http://www.turbosedan.com/vids/Cutlass_0-90mph.mov <--that is how the car is now, after the recent KAZ MotorSports tune).
it sounds like i shifted to 2nd really early but i had to get out of it due to mad tire spin, then start again in 1st (and still spun badly as you can see the speedo and tach flare up FAST and the tach reached ~5500 RPM before shifting to 2nd). i try to shift at 5000 RPM. i shifted to 2nd at around 30mph, shifted to 3rd at 53mph, and then shifted to 4th at 76mph. FWIW 5000 RPM in 4th = about 110mph.
even with the botched launch, mad tire spin through 1st gear, 4500ft elevation and with Dan in the car (i think he weighs about 230lbs; i weigh about 170 fwiw) it still made it to 91mph in .2 miles according to my odometer (which IS verified accurate). that's very roughly 91mph in the 1/4. do you guys think the car could trap 98-100mph at sea level with a GOOD launch and track prep, no extra passenger or other extra weight (like spare tire or tools, 1/4 tank of premium pump gas etc)? i wonder what it would get for an ET? 14.2-ish? i'm guessing the car weighs 3400lbs. it dyno'd 227whp & 325wtq before i had it tuned, and an with an "eductated guess" i'm thinking it would do about 255whp & 360wtq on a Dynojet now. i wish i could go to the track but #1 - it's winter and the tracks are closed around here, and #2) the closest 1/4 mile dragsrip is at 4900ft. i'm just curious what the car is capable of as is.....
any guesses?
14.3 at sea level
Quote from: kuntzie on February 11, 2007, 09:29:06 AM
14.3 at sea level
well i would certainly be happy with that! how fast did you get with the stock turbo and what were your mods with that Jeff?
i hit a 14.3@ 99 MPH if i remember correctly
this was with
1.6/1 rockers
magnaflow hi flow cat
2nd grear dump
street tires
stock clutch
taylor 8mm wires
jeff m x-over
rest of the exhaust was stock
with the gutted cat i hit a 14.4
also was at 11-12 psi (chip was set for 11.5 psi)
oh ay also no a/c if that really matters
also if this is the same vid i saw earlier that comeone else posted on ur site then you were shifting WAY WAY to early on every shift.
when i was running hte stock turbo i didnt go into 5th gear at all going down the track and was shifing at ~6k
Quote from: kuntzie on February 11, 2007, 10:31:16 AM
i hit a 14.3@ 99 MPH if i remember correctly
this was with
1.6/1 rockers
magnaflow hi flow cat
2nd grear dump
street tires
stock clutch
taylor 8mm wires
jeff m x-over
rest of the exhaust was stock
with the gutted cat i hit a 14.4
also was at 11-12 psi (chip was set for 11.5 psi)
oh ay also no a/c if that really matters
also if this is the same vid i saw earlier that comeone else posted on ur site then you were shifting WAY WAY to early on every shift.
when i was running hte stock turbo i didnt go into 5th gear at all going down the track and was shifing at ~6k
thanks! that gives me something to compare to :icon_biggrin:
if you look at my dyno graphs i wouldn't say shifting at 5000 RPM is way too early (although i could be shifting a little faster). maybe if i had my 1.6 rockers in i'd go a little higher, but even then i'd be hesitant to because the engine
does have almost a quarter million miles on it and has never been rebuilt. i don't want to be too hard on it. even with lower miles and 1.6 rockers i can't really see doing any better shifting past 5500 RPMs with the stock GEN-II plenum/LIM/heads. i'd have to see a dyno graph to convince me.
keep in mind the 284s gearing is different than mine. with the W-body 282 gearing, 4th gear @ 5000 RPMs = about 110mph and i'll never be trapping 110+ in this car. all i'd like to reach is 100mph and i'd be happy and leave well enough alone on this engine (and car). IOW no turbo upgrade for me. i really just want to see if i can hit 13.99 @ 100mph (alititude corrected of course) on the stock turbo, intercooler and stock unported GEN-II heads/intakes. i think it's definately possible; maybe use some alcohol injection, exhaust cutout, 1.6 rockers, underdrive pulley, tuning, and drag radials.
looks like the only real difference in mods (when you had the stock turbo) was the rockers and the differences in the chip (however subtle they may be). i have a rebuilt crossover pipe, stock clutch, no AC and street tires as well. my spark plug wires are Magnecor KV85s. i have a test pipe in place of the cat and currently have a pair of rusty OLD mufflers from my Turbo STE that i'm sure are pretty well clogged up. they look like the same mufflers the TSTE had when it left the factory (they're GM mufflers, and the TSTE had 160,000 miles on it when i parted it out). if i keep the car injectors and mufflers are the next thing i'll be doing.
i really need to put those 1.6 rockers in but i still need the pushrod guide plates (i don't want to grind out the current ones). i would try that 2nd gear dump but only after i upgraded the clutch. i think starting out in 2nd and dumping the clutch at higher RPM would help the 60fts alot! our gearing is a little different but regardless both the 282 & 284 are REALLY steep in 1st gear. with all of the low end torque the Turbo 3.1 puts down with the stock turbo 1st gear = smoke show with very little throttle. although i think before i try launching in 2nd gear i'll try staged boost control just to help save the clutch.
Quote from: kuntzie on February 11, 2007, 09:29:06 AM
14.3 at sea level
Josh's car would run well into the 13's at sea level and trap over 100mph(the ET would be in the 13's if traction was anywhere in sight of course). If I had to guess, I would say it would trap at least 102-103mph.
PS: I think you'll trap 96-97ish at 4900'. ;)
fwiw (and i know this is about as unofficial as it gets haha) my brother and i 'benchmark' our cars by testing them going up a local I-90 on-ramp. at the end of the on-ramp there is a big lightpost right where the ramp merges with I-90 itself. we will floor it all the way up the onramp and check our speed just as we pass the lightpost. we've done this 'test' repeatedly with no changes made to the car and the 'trap speed' is always consistent unless the temps are way different (obviously they are faster in the winter).
my stock Supercharged Regal GS only got to 94mph on a cool day last October.
my Turbo Cutlass got to 102 mph last week, but last night i took out the spare tire, along with some tools and camping gear and tried again and got to 104mph! i even had to wait a little to floor it this time because of some gravel at the beginning of the on ramp would have caused major traction loss. i think without that gravel there i could have hit 105mph possibly 106mph.
then my brother's Spirit R/T gets to 110mph. damn it :laugh:
a stock Supercharged '98 Regal GS would typically trap 92mph (correct me if i'm wrong) and i think my Cutlass could trap 10mph over that car easily...at least it seems that way with the 'tests' we've done. i wish i lived closer to a track :icon_neutral: i should get a speedo vid of the Regal GS while i'm scanning. last time i scanned i got next to no KR (.5* at one point then nothing), but that car is SLOW compared to the Cutlass even though it runs great. i'm not saying my GS is slow, but compared to my Cutlass it is.
i'm going to try to make it to Douglas Motorsports park this summer. that is the track that is at 4900ft. there is also the Sturgis dragstrip but that's only 1/8 mile (Sturgis is also at 4900 ft). both tracks are about 1.5 hours away from me. i could go to Bandimere down in Denver but that's above 5000ft i think and the last thing i want to do is break my car 6hrs away from home.
i was hitting 103 MPH traps and still not getting into the 13s
Quote from: kuntzie on February 12, 2007, 03:29:11 PM
i was hitting 103 MPH traps and still not getting into the 13s
you do have different gearing though. i'm not sure if the 284 or 282 gearing would be better for 1/4 trap speeds in our cars though.
EDIT: what was your 60ft time when you hit 14.3 @ 99mph? also, what was your 60ft when you trapped 103mph?
Quote from: kuntzie on February 12, 2007, 03:29:11 PM
i was hitting 103 MPH traps and still not getting into the 13s
You should have been hitting 13's with 103mph traps. Also, I thought you hit 14.0@100mph at best on the stock turbo Jeff? If I remember correctly you were launching in 2nd gear sometimes too(??).
ya that right i did hit a 14.030@ 10x i remember now, ya i was launching everytime in 2nd gear, and all my 60s were in th 2.1 range
great, it's looking like Douglas Motorsports Park is not going to be open for 2007, or probably ever again. i tried to check their website but the domain had recently expired. i've heard rumors they were shutting it down, but it's looking like it's true this time. i think my next best choice would be the 1/4 dragstrip in Pierre, SD. Oahe Speedway is only 1700ft elevation but it's almost 5hrs away. better than Denver though, ecspecially considering the altitude. i've heard really good things about Oahe Speedway (track prep, layout, pit crew etc). they open on April 21st for T&T...i might try to make it and take advantage of the cool spring weather.
I agree shifiting way to early but that car has some grunt!. Get some tires and take it to the track! Just for the record, the cutlass digital dash is by far the best in the w-body world! I wish I could have that in my GPSE!
Ken
OLD POST NOOB! :laugh: lol Josh sold the Cutlass like a month ago.