Here's the deal. When I bought my TGP a month or two ago with 96K for a good price in good condition, I knew I was still taking a risk because on the test drive it was the slowest vehicle I have driven in a long time. I have a 3.1L 93 Cavalier Z24 that ran 16.2 at the drag strip and the TGP was WAY slower than that.
Well I have been slowly servicing every part of the TGP and the more I drive it, the better it seems to get. I know it was in storage for about a year prior to me buying it but even after going through that first tank of gas and refilling, it was not any faster. However after putting about 800 miles on it, it is really waking up. I ran fuel injector cleaner through also and now I got a cone filter for the turbo and that has increased the fun factor by 200% just for the noise alone. The car really rips now and I would estimate it to be mid or low 15s already and I still haven't tuned up the ignition or serviced the tranny or done the fuel filter! (Next on my list)
Anyways, here's my problem. When I was getting into TGPs heavy I wanted one bad and I saw the photo of Jeff leaving 2 loong tire marks and I mistakenly assumed all TGPs had that kind of power. My TGP has 215/50/16 Blizzak studless snow tires mounted on the factory rims (silly previous owner, not my choice) and I cannot spin the tires at all. I can brake-torque to 2000-2500 RPMs and launch and the car moves like a freight train leaving the station... quiet and silent but it gets up to speed pretty quick. A friend told me the snow tires are really soft (they are) and maybe they are gripping really well. I know the are so narrow because they are only 215 instead of the factory 245.
Is my TGP just weak or all they all kinda doggy off the line? I dunno it doesnt actually feel slow off the line, but it just doesn't spin the tires at all. Maybe it has a really sweet traction hookup that I should be appreciating instead of complaining, I dunno. I know some drag-racers spin a lot and they work very hard to do the opposite!! 8)
PS: We also ran my TGP on a scan tool, the knock retard remained at 0.0 under WOT and I always use 93 octane and I never heard it ping so I assume the knock sensor is working properly and knock is not a factor here.
Mine will not spin the tires either, so don't feel bad. I just got new tires and the old ones were bald. I mean belts showing bald. They would not spin either. I like the way they hook up off the line but I'd like to do a little tire frying once in a while. Guess I'll have to wait to do the chip, x-over, and heads.
My car would not spin the tires easily even once I got the chip and an air filter. However, when i tore down my motor i noticed i had a wiped cam lobe and a few others were low on lift. So it may have been the cam. My brothers car will spin the tires more easily, but not for 20 feet like the picture shows. We've had discussion on this before and are attributing it to inconsistencies in the wastegate actuator and other minute differences between cars.
speaking of wastegate actuators...on my tgp it was overboosting everytime I hit the gas and I traced to a the wastegate and finally the wastegate actuator. I had an extra T25 laying from a turbo sunbird and I switched actuators. My car never overboosted again and I know that the actuator was the problem. I put a boost gauge on the car and it ran between 7 and 8 lbs of boost. My car even before I got the chip would spin the tires a decent amount off the line. Now that I'm chipped it's even better. I was wondering how many lbs the wastegate actuator is set to in the TGP and in the turbo sunbird if anyone knows??
Well untill my Wires went bad, which have not been changed in like 60K no joke.
I could Spin mine for about 10-15 Feet then when it would shift it would Cherp again.
how ever now I can just get a small Cherp 1-2 sec thats it.
I know the minute I go to change and do a tune up on her she will Rip again no Questions asked.
I also know the car is not governed at 128 Like it is supose to be I have been clocked at 135
so I do not know if mine is chiped but judging by the neglect the Prev owners did to her Im gussing not. I think its just a Freak of production.
Clays TGP doesnt spin them either if I remember correctly.
but mine does and I dont know how. or why.
A word on the Governor.
This car is NOT speed governed. What happens is it will hit the REV limiter at 128mph in 3RD gear. If you have the pedal mashed, it will not shift into overdrive (this is a function of the transmission, not the chip), because of the large amount of force on the clutches in the high gear. So if you have it to the floor, you will hit the rev limiter at 128mph, but the true top speed is much higher.
Chris
ok right now i have the lumi ok i knwo this isn't tgp but hwpo do i get it past the 128 say if i had a tgp....
well my TGP has been messed up since I go it and I can punch it even with boost cut and peal/burnout for about 10-15 feet and its an auto BONE STOCK! so something is wrong with your car i am using 245-50-16's.
I had my TGP at 133 on the HUD with plenty of throttle left over. My roomate and his Girlfriend are my witnesses. That was with the Auto in it...let's see what we get with the 5-Speed in her.... 8)
Just outta curiousity, what is the true top speed...I have pegged the speedo out and wanted to know...by the way everyone, the car is getting assembled and painted this week...cant wait to get some pics to show ya! :lol:
Oh...duh, i forgot to mention about the tire peelin thing, mind doesnt really peal tire too much. My car just has a nasty case of wheel hop. If i mash it, the damn thing just sits there and bounces the front tires up and down, rattles the whole damn car...downside to FWD!
Quote from: JTOWNPATGPJust outta curiousity, what is the true top speed...I have pegged the speedo out and wanted to know...by the way everyone, the car is getting assembled and painted this week...cant wait to get some pics to show ya! :lol:
I've heard 152 has been reached. I don't think there is a tested top speed.
Quote from: JTOWNPATGPMy car just has a nasty case of wheel hop. If i mash it, the damn thing just sits there and bounces the front tires up and down, rattles the whole damn car
well it sounds like you need struts and springs my friend. of course if you have z rated tires that are sticky they would give hop too because of the Friction
I never get wheel hop just a nice spin.
I can spin my tires on an incline! Rarely I can spin them from a stop on flat pavement. Then again, I don't have the chip or crossover yet.
YES!
This car (TGP) is quite different from others (rear drivers), though. Mine will come off the line about like a N/A injected FWD, but as soon as it starts to generate boost, it is radically different. It immediately goes to wheel spin, with significant torque steer side to side for the next 25 feet or so, then hooks up and gets on with it. 1-2 shift also barks the tires, not just a chirp!
Everything so far to my knowledge is stock, no chip, no Xpipe, only mod is the converter is out since it plugged from a bad turbo, and the muflers are shot. Tires are good 245/50/16's.
Comparitivly, my IROC will light the tires immediately at launch, and it takes 20 feet or more to get them hooked (same 245/50/16's), but doesn't launch nearly as radically as the TGP. It is much more gradual, feathering the go-pedal will hook it up quicker, but doesn't seem to effect 1/4 times much. There is no need to feather the TGP, as power to weight is just about right.
All in all, the TGP is much more fun to drive cause the launch is so much more radical. Just doesn't have the raw ponies to do the 'smokey burn-out' for ricer showdown.
Yeah - mine gets a little bit of wheel hop on the launch as well (Z rated tires) and chirps into 2nd. This is when I stomp it off the line. My solution was to not stab at the gas, rather I feel for the break point and let my foot ride into it while maintaning traction (and countersteering against all the torque too). You want your car to hook up anyway, not smoke em, right? :D
Just got the TopGun 160 (and filter mod) installed, and I have to agree with mongoose, you really need to manage the throttle, as this thing will light the road on fire (or all the smoke would make you think so). The hole-shot is fantastic, what fun to pull next to a buzz-bomb ricer w/ a coffee can an $2500 in wheels and play with him. I just apply enough throttle to keep ahead of him, when I get traction, then I ante up a little more and tease him. Next light, they let it all hang out, and again I just spool a little harder, kinda' like playin a big ole' Bass!
I think i figured out your problem. Its you intake. When i remove the stock intake and then punched it i burn the tires immediatly, with the intake on I can barely spin the wheels in a turn. Of course if you remove the stock intake you are going to exceed 9.5psi which will result in boost cut so in plain old words you must get a chip!!!!!!
Just wanted to post an update to this old topic. Since I installed the BoostValve manual boost controller and set it to 8-9 PSI, I can now spin the tires massively through 1st and halfway through 2nd gear up to about 40-50 MPH. I raced some RWD Lincoln car egging me on at a stoplight the other day and tried easing in the throttle from an off-idle launch and when I saw them right next to me I could not resist putting my foot straight to the floor -- it left 2 black marks all the way across the stoplight intersection AND THEN SOME!! I went back the next day and the marks were still there.
If I brake-torque the motor from a standstill and generate boost and THEN floor it, OMG it nearly does a "Top Fuel burnout"... So yes it definitely can spin the tires now; in fact I'm all too aware of that and I hardly ever hit the gas in 1st gear anymore while it's winter here.. road is too cold; I'll never hook up.
It's all from the massive spoolup of that manual BoostValve. 8) :lol:
On the subject of tire spin, some factors that can effect whether the tires stick hard are:
the tire quality, the road surface, the temp of the ground, and STE's have skinnier tires.
On the subject of top speed, I have 2- TGP's, one is a low mileage car with no mods except a K&N cone. The other is a higher mileage car with a rebuilt trans. The weird thing is my low Miler car does as Chris A. stated that the trans. kicks down to 3rd when floored at high speed, limiting top speed. My higher mileage car does not kick down but stay in 4th and can pull a top speed easier. Any one no why there's might be a difference between ? Does anyone elses car stay in 4th for a top speed run ? :?: :?: :?: I prefer staying in 4th at high speed.
To tell you, I base my points on 13 years of experience, and talking to over 2,000 TGP owners :-). First tire spin on Josh?s TGP. There are variations between all like cars, miles even being the same or even if both were new or both had 10K miles. The times posted in mag on these TGPs back in 1989 and 1990 showed new models having ets from a best of 15.3 to worst of 16.3, and 0-60 best of 7.0 (in 20 DEGREE weather) to a worst of 8.4 (in 80 DEGREE weather!!). Now both those statements indicate the variances in new vehicles ALONG with the effects of weather, give any 2 TGPs in the same weather will have different ets! Slower TGPs I have found were sometimes the result of the variations on wastegate spring pressures, but there are other factors with these turbos now that they have some mileage on them, key issue is previous maintenance, any burnt oil/mineral oil use with abuse, and the turbo might not spin as freely. The other more common problem is the turbine wheel contacting the turbine housing, this from combustion byproduct build up closing the clearances between the 2, and I have seen my share of TGP turbos, and have cleaned out the build up and gained back good powerful spool up. There are other problems such as the cat getting plugged/partially plugged from running with a cracked OEM crossover pipe and the excessive rich fueling it causes. Aside from those, there is the possibility of the tranny fluid filter being a little full of debris and not allowing full fluid flow. There many other variables aside from just those in newly assembled engines that the mags have proven year after year, a test on a couple of ZR1 Corvettes, that ran 1 second faster with the older 380 hp motor than the bigger 405 hp motor. So, Jason may find when the weather gets warmer he has better traction from warmer rubber/pavement and not as dense of outside air!! Don?t bum about it, get chip?d :-).
Now on that tranny issue going or not going into 4th gear. Some of the first 1989 TGPs were setup to allow 4th gear and WOT, but very soon there after this feature was removed, and for very good reason, 4th gear only has 1 clutch and 1 steel (2nd gear has 10 !!!). So from the failures of 4th gear and WOT, GM took out that feature to save failures, and I hope you are listening, DO NOT run WOT and 4th less you want another rebuild!! OK, yours is a 1990 and can do 4th and WOT, its not normal and indicates you should be very careful to not beat on this tranny by doing any high speed runs, specially on warm to hot days, or like I said in my first sentence above, will find out the tranny will fail/did that once so, learn from my experiences. On that same topic, ALL TGP owners should avoid running 90 and above mph especially on warm to hot days, I know too many owners who were into this and soon had dead trannys, its that single clutch and steel that is the weak link that we must avoid pushing (In the performance tranny rebuild kits I will have, 4th gear is fixed 3 times over and comes with double the clutches and steels). So, easy on those TGPs and high speed running!!! If you need to brag, no one will know, just say they can break 150 mph, I have done it and so has a few others, that?s a fact!
Jeff M
Quote from: Jeff MNow on that tranny issue going or not going into 4th gear. Some of the first 1989 TGPs were setup to allow 4th gear and WOT, but very soon there after this feature was removed, and for very good reason, 4th gear only has 1 clutch and 1 steel (2nd gear has 10 !!!). So from the failures of 4th gear and WOT, GM took out that feature to save failures, and I hope you are listening, DO NOT run WOT and 4th less you want another rebuild!! OK, yours is a 1990 and can do 4th and WOT, its not normal and indicates you should be very careful to not beat on this tranny by doing any high speed runs, specially on warm to hot days, or like I said in my first sentence above, will find out the tranny will fail/did that once so, learn from my experiences.
If you need to brag, no one will know, just say they can break 150 mph, I have done it and so has a few others, that?s a fact!
Jeff M
I wanna brag!!! :lol: There is a ratio to figure out what the actual speed would be, but at 4750 +/- 200RPM with my 5-Speed I showed 138MPH on the HUD. As far as I can tell my speedo is 15MPH slower than the actual speed. That was a fun night against my ex-girfriends 1998 Porche convertible. She said something about whoever got to her house first got oral sex until they were satisfied!!!
As far as the 4th Gear high speed runs...I couldn't agree more. That is what I think finished off my tranny before I decided (forced) to do the 5-Speed swap in the TGP. I take care of my cars, but when they are built to go very fast...I go very fast!! :wink:
Quote from: 1trucavalierwell my TGP has been messed up since I go it and I can punch it even with boost cut and peal/burnout for about 10-15 feet and its an auto BONE STOCK! so something is wrong with your car i am using 245-50-16's.
My TGP w/ 147,xxx miles on her has no problem lighting up the tires as well. it is 100% stock. I can light them up for a good 10ft+ as well. Keep in mind i am also at 5000ft altitude. It will spin them if i powerbrake them and when the trubo spools it spins them even harder. I can break them loose from a dead stop w/o powerbraking, it obviously is not as much but they chirp then continue to break lose again when the trubo spools.
I must pick good cars.. my motors all must be wed. motors. even my monte w/ 17's was able to break them lose every now and then. (100% dry pavement)
Shane
Quote from: TGPilot
She said something about whoever got to her house first got oral sex until they were satisfied!!! :wink:
If that where the wager and she was attractive, I would have beat anyone there on a huffy! :lol:
Shane
after having my tgp now for a year I can almost guaranty that if you can's spin em its you tranny, not engine. If you can't boost correctly then of course then its engine related but if it runs good, boost fine, then its the tranny. The other alternative is to remove the vaccume hose on the turbo and punch it :D just don't go over 3K! :cry:
i got mine, 70k miles, all stock, so i know, an old lady had it, i doubt its chipped, but u smash the gas at a stop and u just spin the tires, flat dry pavment, too, i did it, rocks from the road flyin up hittin the hood and smoke and the wheels are screaming and its sittin at 5k RPM's just burnin out, it doesnt shift till it gest enough traction
Wow, old post. But to update with my car, I can spin my tires all the way through first with my current mods :twisted: Got to learn to control it though when I'm at the track so I can bring down my 60ft. :oops:
Since this thread was revived, I guess I'll post. My TGP(chip, intake, & 2.5'' exhaust) will roast the tires for a LONG way from a dead stop and just punching it. I've also launched w/ boost once on my Goodyear RS-A's(stock size) and that probably took a few thousand miles off of the tread life, awesome smoke show. :mrgreen:
My STE when it was stock, would take off from a stop and then chirp the tires after getting up to about 5mph. After a modified boost controller it would smoke them up to about 20mph or so. Then I cut the cat out, put a K&N filter on the turbo, and put a chip in, and holy hell. From a 20mph roll the tires would break loose. Now with the topend from a 20mph roll it makes a smoke show.
The TGP coupe however, will just barely chirp the tires off the line. IF you brake torque it will brake them loose okay, but on sticky pavement it grips. This is why it cuts 2.0 60's at the track, because you brake torque to 3k and mash the gas.
All cars are different...
Shawn
My tires will light up if the wheels are turned. I tried it one day at a four way stop and after I straitened the wheel out the tires were still spinning (for about another 5 feet). And thats with just flooring it from a stop. The only mod I have is a K&N air filter and thats with 225/60 16 tires :( (working on replacing the bent rack and pinion before I buy new tires).
Quote from: SpeedDemonMy tires will light up if the wheels are turned. I tried it one day at a four way stop and after I straitened the wheel out the tires were still spinning (for about another 5 feet). And thats with just flooring it from a stop. The only mod I have is a K&N air filter and thats with 225/60 16 tires :( (working on replacing the bent rack and pinion before I buy new tires).
VERY bad idea. The reason it will do that is because A) As you turn you are lifting all the weight from one side, and placing it on the other, and B) as by design, the tranny will plant all power to the side w/ the short radius (IOW, all power goes to the wheel w/ no weight on it)
1) Bye, bye spider gears
2) Bye, bye C/V joint. They LOVE it (sense the sarcasim :D ) when you peel out at full lock.
Not bashing you, just don't want you to have any tranny problems or broken axles. These cars are only fun if you can drive them (trust me. :oops: )
Quote from: god910Quote from: SpeedDemonMy tires will light up if the wheels are turned. I tried it one day at a four way stop and after I straitened the wheel out the tires were still spinning (for about another 5 feet). And thats with just flooring it from a stop. The only mod I have is a K&N air filter and thats with 225/60 16 tires :( (working on replacing the bent rack and pinion before I buy new tires).
VERY bad idea. The reason it will do that is because A) As you turn you are lifting all the weight from one side, and placing it on the other, and B) as by design, the tranny will plant all power to the side w/ the short radius (IOW, all power goes to the wheel w/ no weight on it)
1) Bye, bye spider gears
2) Bye, bye C/V joint. They LOVE it (sense the sarcasim :D ) when you peel out at full lock.
Not bashing you, just don't want you to have any tranny problems or broken axles. These cars are only fun if you can drive them (trust me. :oops: )
I only did it once just to see if the car could do it. Ever since I've just been trying to get it running right. But back on topic, from a strait line the car won't burn out. :x
Quote from: SpeedDemonI only did it once just to see if the car could do it. Ever since I've just been trying to get it running right. But back on topic, from a strait line the car won't burn out. :x
Do you want the car to be able to burn out? If so, I can help you do that for about 5 minutes of your time and about $.05. Its not good for the tranny or the tires, but it will really wake up your TGP...
Shawn
why cant u people spin ur tires, i can spin the tires in my friend old 3.0 Mercury Sable, and its hella Slow, u people should be able to
Quote from: Prospeederwhy cant u people spin ur tires, i can spin the tires in my friend old 3.0 Mercury Sable, and its hella Slow, u people should be able to
I think they are talking about, from a stand still, get on it and yeah....
from what I have gathered, it has some to do with the turbo spooling, or lack there of in some people's cases that would be one reason why, such as mine.
Yes, you can get just about any car to spin the tire, I know our '04 TSX has some difficulty but it will, and with some work, I even got the friend's lifted Excusion to spin the tires. :shock:
I know my TGP doesn't have a prayer in the world of spinning the tires of the line right now, but damn when the turbo spools its a whole different story, keeping the car straight is the problem then :x :roll:
Could be that some people have really old tires...or real good ones. With the stock chip the tires would smoke at more than 1/2 throttle from a stop. Now with the TG you hit the gas and the car moves, then 1 second later the tires roast.
well u just Floor is fast from a stand still,. like bring ur foot up and smash it down, ull spin em, the 3.1 w/o boost should be quite capable of doing it, then as the RPMs hit up and turbo spools up its hard gettin traction back
QuoteCould be that some people have really old tires...or real good ones. With the stock chip the tires would smoke at more than 1/2 throttle from a stop. Now with the TG you hit the gas and the car moves, then 1 second later the tires roast
My tires aren't that old, they are about 1 year old, but still with some peoples situations, I don't think that matters, such as mine, it usually takes until about 3000 before the car really wakes up, and even a little power brake its still right around 2800 or so before it starts going anywhere
Quote from: Prospeederwell u just Floor is fast from a stand still,. like bring ur foot up and smash it down, ull spin em, the 3.1 w/o boost should be quite capable of doing it, then as the RPMs hit up and turbo spools up its hard gettin traction back
Yes this I have found out ....our '88 Beretta GT 3.1/5spd and Haltech....and damn, all of 1st and 2nd gear can end up in tire spin if your not careful, and thats with good 17" tires, now with the 15" winter tires...oh it would be ugly I'm sure
they must not be pushing the gas fast enough,lol
Quote from: Prospeederthey must not be pushing the gas fast enough,lol
Your free to come on over any time to see if you can get my TGP to "roast" the tires by just getting on it.....try all day, and until you unbolt the exhaust, its not going to happen.....
My Black 90 TGP spins the tires at anything under 25mph and on wet pavement I've broke them loose at 65mph!!! :shock: :drinking:
lol, i dont see why they wont, mine completely stock, it does it just fine, i doubt mileage is a problem either, if so, mine has 70k miles on it
Quote from: Prospeederlol, i dont see why they wont, mine completely stock, it does it just fine, i doubt mileage is a problem either, if so, mine has 70k miles on it
I don't see how that could be a problem either considering the stock? engine had 140,000? miles on it, and the new engine has <15,000 miles....
For my problem, I'm pretty sure it has something to do with a restricted exhaust preventing the turbo from spooling when it should thus causing the problem.....considering the turbo has been rebuilt recently, and has brand new Jeff M Crossover, so i'm sure there is no exhaust leaks, so restricted exhaust is all I can come up with. I don't know how easy it would be to unbolt the exhaust from the downpipe however to check this theory, and the engine isn't exactly the quietest engine without an exhaust either, even with a turbo....
why is ur exhaust restrictive? isnt ur car stock? and i dont have the new cross over, and mines just fine, thats strange
Quote from: Prospeederwhy is ur exhaust restrictive? isnt ur car stock? and i dont have the new cross over, and mines just fine, thats strange
Because catalytic converters are stupidly restrictive. The cat got plugged up in my dads TGP so we had a high flow cat installed and the car ran well. Ran a best of 15.06 I think. A week later, we decided that it seemed like the cat was still a restriction, so we put straight pipe in instead. We ran it again and it went 14.819. So, even a brand new cat is quite a restriction. If you take the stock cat from a TGP, and replace it with straight pipe, you will be amazed at the difference.
Shawn
Quote from: no1kickerCould be that some people have really old tires...or real good ones. With the stock chip the tires would smoke at more than 1/2 throttle from a stop. Now with the TG you hit the gas and the car moves, then 1 second later the tires roast.
That could be part of it, my STE had some pretty shitty tires on it when I got it, but it still could barely turn those over. With my removed cat and K&N filter, it had no problem roasting the shit out of them. I put my dads RSA's on it from his GTP and they were a lot better, and stuck almost like the other tires when the car was stock. Then I put the chip in and from a 25mph roll they would go up in smoke, a lot of smoke. Then I put my Bridgestone Potenza's on it and it wouldn't break them loose unless I was going <10mph. Then I did the cam/topend and it will smoke them from a 20mph roll. So, it could be partly the tires, but I have some pretty good tires, and I sure as hell can't keep them planted to the ground.
Shawn
Quote from: Prospeederwhy is ur exhaust restrictive? isnt ur car stock? and i dont have the new cross over, and mines just fine, thats strange
Yeah what he said, but no, the car is FAR from stock engine wise......so yeah, that is why I think it is the exhaust causing the problem
i take it the catylic converter is a huge restriction
I can spin my tires through first [once boost hits anyway] with my 235/45/17 ZR-Rated Nitto 555 Extreme tires. 8)
Quote from: 90TGPI can spin my tires through first [once boost hits anyway] with my 235/45/17 ZR-Rated Nitto 555 Extreme tires. 8)
The speed rating has nothing to do with how well the tire grips. The traction, temperature, and treadwear ratings tell you that. However, usually the higher speed rated tires are better performance tires so they grip better. Higher speed rated tires will have stronger sidewalls so they won't flex as much on takeoff and around curves and stuff, whereas if you get the lower rated tires the sidewall will flex a little more helping the tread grip the ground better. If that makes any sense. I'm sure they are sticky tires, its just that telling someone the speed rating when your trying to explain how sticky they are doesn't exactly help.
Shawn
is there a point to having Z rated tires that are exspensive and u can only go what....128 mph
Yes the Z rating tells it grabs the road well and and has a higher speed rating. If you are going 128mph+ you need to think about what would happen if a rabbit or small animal ran out in front of you... or worse yet a large animal or another viehcle :shock:
small animal, bye bye, large animal or car, u have ABS brakes, ur not gonna lock up anyway, so traction in brakin is no good there, and turning, not a good idea at 128mph, u might as well pay for going that fast
Quote from: Prospeedersmall animal, bye bye, large animal or car, u have ABS brakes, ur not gonna lock up anyway, so traction in brakin is no good there, and turning, not a good idea at 128mph, u might as well pay for going that fast
You do know that maybe, just maybe someone may be going that fast on a road racing track right...not nearly as much chance of that happening then, and if you see a small animal doing 128, then you probably wont be swirving around it....
the speed rating really just tells you how much centripital force a tire can withstand. that force then coralates to a certain tire rpm and also to a vehicle velocity. just means they are higher strength.
please correct me if im wrong
Quotelower rated tires the sidewall will flex a little more helping the tread grip the ground better
you want flexible sidewalls for drag racing but not for road-racing/cornering...is that right?
Quote from: futuretgp'erQuotelower rated tires the sidewall will flex a little more helping the tread grip the ground better
you want flexible sidewalls for drag racing but not for road-racing/cornering...is that right?
Yup. You want a stiffer sidewall for cornering, weaker for straightline.
Quotethe speed rating really just tells you how much centripital force a tire can withstand. that force then coralates to a certain tire rpm and also to a vehicle velocity. just means they are higher strength.
please correct me if im wrong
Basically, yes. Its just that usually, if you're buying a Z rated tire it is a performance tire so it is better in straightline.
Quoteis there a point to having Z rated tires that are exspensive and u can only go what....128 mph
Z rated tires are rated for 155+. If you want to be able to go that fast, then you probably should have some Z rated tires. But usually, when you want a sticky performance tire, they will be Z rated or W rated or V rated to begin with, so you automatically get the high speed rating, when you might necessarily not even want it. And like I already said, the sidewall is going to be stiffer on a higher speed rating tire, so the car should theoretically handle better with a z-rated tire over a lower rated tire.
When I got tires for my STE I got H-rated tires because these particular tires were rated very well for wet and dry traction, I really don't need to corner all that well (but they were still rated pretty well for cornering as well) and they were significantly cheaper than any z-rated tire I could find, and H rated tires are rated for 130mph, why do I need to go more than 130 anyways? And, the speed rating is for that sustained speed for an hour, its not like anyone needs to go over 130 for an hour!
Shawn
My Nitto's are a HUGE improvement from my old R-Rated all-weather pepboys tires I had on the original wheels. Night and day difference on the handling. 8)
Shoot, today, it was cold, and i had put 35 lbs of air in my tires cause they only had like 15-20 lbs, and on dry pavment i pushed the gas mabye half way and the thing just lost the tires, didnt burn out, but spun and sqealed them, kinda annoying, i always loose traction with this car, gravel is a pain in the ass too, i wonder how this thing was like brand new, that old lady that owned this must have had a need for speed lol