Who would be interested in a custom mandrel bent stainless Crossover with stainless braided flexes?
I built one on my can and have been running it for a while now. would you guys be interested in them if i made them? I would need your stock x-overs for the stock flanges and EGR Bung. the mandrel bends are much better flowing the the stock bends, so you will not have restrictions due to the crossover feeding the turbo. it should result in faster spoolup times, more overall flow out of the engine to the turbo.
here are pics of my mandrel X-over (EGR Removed)
here is my yahoo club photo album -go the the 1990 turbo Grand Prix
http://f1.pg.photos.yahoo.com/ph/redzmonte/my_photos
http://us.f1.yahoofs.com/users/264e494c/bc/1990+Turbo+Grand+Prix/__sr_/f2e9.jpg?phapyfABmP7SCYvR
http://us.f1.yahoofs.com/users/264e494c/bc/1990+Turbo+Grand+Prix/__sr_/cabf.jpg?phapyfABNzyr9f0q
http://us.f1.yahoofs.com/users/264e494c/bc/1990+Turbo+Grand+Prix/__sr_/8343.jpg?phapyfAByA0l2ri_
also i have made a Custom downpipe for my car. i wanted to know how much interest there is in the downpipe.
here is a pic. it is 2.5" Mandrel Bent. it will be flange to flange and will need to be perfessionally installed.
http://us.f1.yahoofs.com/users/264e494c/bc/1990+Turbo+Grand+Prix/__sr_/mstgpdp.jpg?phCgyfABTfov1jVI
http://us.f1.yahoofs.com/users/264e494c/bc/1990+Turbo+Grand+Prix/__sr_/mstgpdp4.jpg?phCgyfABwxuBEEmd
Just trying to get a feel of interst. post if your interested. pricing will be very reasonable.
Depending on $$$
im "intrested" in both
keep me posted
Added pics -TTT
no worky
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If all you need is the flanges could you take a n/a 3.1 x-over? I don't want the egr bung. (Twill be removed from coding) And perhaps throw a different flange on there? :lol:
Quote from: god910And perhaps throw a different flange on there? :lol:
Good point. If we're going to start messing around with custom x-overs, wouldn't this be a good oppurtunity to rig up a flange that would accept....say....a T3? :shock:
And what's involved with deleting the EGR?
so uh... yea. where's the pics? i'm just getin [X] too
im in on the Removal of the EGR also....how to??????
Quote from: god910If all you need is the flanges could you take a n/a 3.1 x-over? I don't want the egr bung. (Twill be removed from coding) And perhaps throw a different flange on there? :lol:
same here.
FWIW, my TGP crossover was rebuilt by Shane using SS braided flexes, and it looks really good. i have yet to actually use it tho.
throw some pics up of it
(http://www.turbosedan.com/P1090042.JPG)
(http://www.turbosedan.com/P1090041.JPG)
ain't nuttin wrong with that........... :D
Faster spooling? If the T-25 spools any faster we'll have full boost at idle.
i'm gonna be interested in getting a new x-over... wether it be this one or one from Jeff M possibly debatable.
Quote from: redturbo90Faster spooling? If the T-25 spools any faster we'll have full boost at idle.
I can power brake and get 10PSI at a stop if that helps any. don't know what you guys are getting.. i am only running 10psi on wot btw with stock mufflers.
i changed the IMG to URL, try the links.
RedZ
I need to check on the downpipe but the mandrel x-over with your stock flanges will be ~$375US shipped. again i need the stock flanges to build them so i would need the stock x-over up front to build them.
as far as adding a T3 flange on i can do it for the cost of the flange. but i will have to figure something out with the mounting bracket to the tranny.
shane
I dunno about the rest but those pic links don't work for me nether.....
try this link:
here is my yahoo club photo album -go the the 1990 turbo Grand Prix
http://f1.pg.photos.yahoo.com/ph/redzmonte/my_photos
I'd possibly be interested in the downpipe. Would you need the flange from the stock downpipe?
So if we were gonna go w/ a different turbo flange and no EGR could we use an N/A x-over? The only x-overs I have are JeffM's. I wouldn't mind trying one out (I can't get near 10 psi, line boost, but would love to) :twisted:
Quote from: The Burning RomI'd possibly be interested in the downpipe. Would you need the flange from the stock downpipe?
no. i have that flange. the only flanges i would need would be for the x-over
Quote from: god910So if we were gonna go w/ a different turbo flange and no EGR could we use an N/A x-over? The only x-overs I have are JeffM's. I wouldn't mind trying one out (I can't get near 10 psi, line boost, but would love to) :twisted:
no, the NA x-overs are much different. modifying your existing one or making a new one would be the way to go.
I power brake and build 10 psi. I have for mods. Custom intake, Mandrel X-over, mandrel Downpipe, Gutted Cat, Stock Catback. I Live in 5000ft altitude on top of that.
Redz
As long as the pricing is reasonable, I am interested also. How big is the downpipe going to be? 2.5", 3"???
Shawn
Same, Same, how much for 3" downpipes?......
Me too, I would be interested in a 3 inch down pipe. It would compliment my new exhaust nicely. $????
Mike
I will have to check, but i think 2.5" was a tight squeeze. i don't know if a 3" will fit.
1.75" Mandrel bent X-over w/ ss braided flexes $375 Shipped +stock x-over
2.5" mandrel downpipe With SS Braided flex. $155US Shipped
shane
Quote from: RedZMonte1.75" Mandrel bent X-over w/ ss braided flexes $375 Shipped +stock x-over
2.5" mandrel downpipe With SS Braided flex. $155US Shipped
shane
That crossover price is the same if we provide a different flange for the turbo, correct?
I am very interested....when I get the $ I will definately buy!
Thanks,
Shawn
Quote from: RedZMonte1.75" Mandrel bent X-over w/ ss braided flexes $375 Shipped +stock x-over
2.5" mandrel downpipe With SS Braided flex. $155US Shipped
shane
i'm definately interested in the downpipe. do you need the old downpipe?
Another question...
The downpipe...will it still bolt up to the stock exhaust even though the downpipe is 2.5 & the exhaust is 2.25"? (so I can use my stock exhaust until I can get it upgraded) Or is it 2.5" and I have to get a 2.5" exhaust to bolt to it? And, if it will fit a 2.25", it will still fit a 2.5" also??? I just want to make sure this will work how I want it to.
Thanks,
Shawn
Get a reducer. Make it work. Then upgrade, and take out the reducer.
What kind of power gains did you see with the downpipe? [I remember a year ago when you first made it you were estimating $250+ for a downpipe :shock: ]
How hard would it be to install?
Quote from: 90TGPWhat kind of power gains did you see with the downpipe? [I remember a year ago when you first made it you were estimating $250+ for a downpipe :shock: ]
How hard would it be to install?
It shouldn't be too difficult. It is just a few bolts. However, getting to them will be the problem, and getting it to come off if it has been connected for the last 14 years.
I would think the gains would be pretty good assuming the rest of the exhaust flowed good (basically a 2.5" exhaust with high flow cat/no cat, and good flowing mufflers). I am hoping to use the downpipe to help me pull off a 13.999 this year. I am going to try and see if I can do it on the stock turbo...that is the goal.
Shawn
Quote from: dbtk2Quote from: RedZMonte1.75" Mandrel bent X-over w/ ss braided flexes $375 Shipped +stock x-over
2.5" mandrel downpipe With SS Braided flex. $155US Shipped
shane
That crossover price is the same if we provide a different flange for the turbo, correct?
I am very interested....when I get the $ I will definately buy!
Thanks,
Shawn
yes, i need the stock x-over sent to me with the payment so that i can use the flanges off the stock x-over because they are not standard T25 flanges.
Quote from: malibuoldsQuote from: RedZMonte1.75" Mandrel bent X-over w/ ss braided flexes $375 Shipped +stock x-over
2.5" mandrel downpipe With SS Braided flex. $155US Shipped
shane
i'm definately interested in the downpipe. do you need the old downpipe?
no, it is a full new downpipe. As i stated previously i have the flanges for the downpipe. and the downpipe will have to be professionaly installed.
Quote from: dbtk2Another question...
The downpipe...will it still bolt up to the stock exhaust even though the downpipe is 2.5 & the exhaust is 2.25"? (so I can use my stock exhaust until I can get it upgraded) Or is it 2.5" and I have to get a 2.5" exhaust to bolt to it? And, if it will fit a 2.25", it will still fit a 2.5" also??? I just want to make sure this will work how I want it to.
Thanks,
Shawn
it will be flanged. so you will have to get it professionally installed. they will make it fit to the stock cat and catback. as you see in my pics i have a flange welded to my stock cat. then i gutted my cat. so the answer is yes, it will fit the stock exhaust but it needs to be professionally installed.
the downpipe is only the pipe. it does not include a cat. Just to clear things up.
Looks Awesome
I would be in for a 2.5 Downpipe or if a 3 inch will fit and your considering making them i would take that over a 2.5
but im in for a downpipe regardless
I have a few questions about the crossover though
I will PM you
thanks REDZ
Dave
I am kinda curious to know how you figure a larger downpipe will benefit on a stock T25 turbo setup? There is so much backpressure in the system it is sad...but putting a larger diameter exhaust pipe on after the T25 exhaust fan (turbo drive) really wouldn't seem to benefit. Now with a T3 or T4 turbo I could see major gains over the stock exhaust ID" going up to 3" all the way back... 8)
when it comes to turbo's the more you can open up the exhaust system and let gasses out of the turbo you will allways benifit. the faster you can get gasses out of the turbo the faster it will allow gasses to travel into the turbo, resuling in faster spoolup and better the gasses will flow at high rpm's.
RedZ
What's the largest anyone has gone on the exhaust all the way through on a TGP? Would 3" be too much?
Quote from: 6000STE/AWDWhat's the largest anyone has gone on the exhaust all the way through on a TGP? Would 3" be too much?
the biggest i have heard of was 3", but that was on eclipse5302's '91 Cutlass Sedan with a TGP engine. you can see pics of it at http://www.turboste.com i am wondering if he had boost creep problems using such a big exhaust with a small turbo?
I have spoke to him a few times about Swap related stuff and he never mentioned anything bad about his fully 3' Exhaust set-up.
Quote from: RedZMontewhen it comes to turbo's the more you can open up the exhaust system and let gasses out of the turbo you will allways benifit. the faster you can get gasses out of the turbo the faster it will allow gasses to travel into the turbo, resuling in faster spoolup and better the gasses will flow at high rpm's.
RedZ
Hows it going RedZ 8) . Got to say that going that big will hurt performance for the fact you lose exhaust gas velocity :cry: , not a good idea like welding mild steel to stainless. 3 inch is too big for a T25, T28 or some T3s. I have a T70 turbo on my truck and on the dyno going from a 2 ? downpipe to a 3 inch down pipe netted only a 3% gain in hp :roll: , but that is a much bigger turbo than these. It also depends on the length of the exhaust system, if it were shorter you could get away with bigger, but adding mufflers and cats changes that as well. And before anyone bites on that cat :lol: , tests have shown very little hp loss from a stock cat, upgraded ones are the best if you have to hate your :snipersmile: cat.
Jeff M
i now have everything i need. I can make the downpipes and Mandrel x-overs if anyone is interested.
any idea how long it would take? just wondering how long i'd be w/o a car while a x0ver is being made from the stock one.
Quote from: tyroeliteany idea how long it would take? just wondering how long i'd be w/o a car while a x0ver is being made from the stock one.
2-3 days plus shipping time. so with shipping ~5business days maybe faster.
Shane
Well, Shane, I'm out on the X-over because I don't have a core. And I'm not chopping up one of my Jeff M's :shock:. I do have a question about the DP though. Are you using stock flanges for it, or do you have an aftermarket supplier of them? I have been looking at my extra DP, and it looks like I can grind the welds off the flanges (that would separate the SS flex braids), but I don't know what is under them. Anyone know? Since the 5 speed is a track/RARE weekend runner I am thinking of making a 3" DP and dump it behind the Driver front tire.
Let me check into flanges. I might be able to get some made. its going to make it cost more obviously but you won't need a core.
as for the downpipe i have all the flanges and everything i need for it. unless your running a larger turbo i don't think you need a 3" downpipe. if you want a 2.5" mandrel dump i can probibly make one. your best bet is to just get the one i make now and unbolt it from the cat, that will be just as good if not better because you don't need to swap the pipe at the track, just undo the 2 bolts.
OR another option is to add a cutout into the downpipe and unbolt the flange at the track with the wing nuts.
Shane
Shane - i'm a little confused about the downpipe you sell. does the downpipe you sell go from the turbine housing to the cat, or is it just the 'S' shaped pipe between the cat and the part of the downpipe that has the SS braids on it? (like in the pic on your website) in other words, does your downpipe replace this part:
http://turbosedan.com/turboste/DSC00901.JPG
I believe its the part after that section in your picture josh.....
where that piece connects to the actual Exhaust pipes that hug the frame and bend towards the Cat.
Dave
Quote from: DavisI believe its the part after that section in your picture josh.....
where that piece connects to the actual Exhaust pipes that hug the frame and bend towards the Cat.
Dave
correct
ok, just wanted to be completely sure.
FYI: I can make the turbo flange but and i just orderd 2 flanges for Manifold to x-over to see if they will work. i want OEM style ones so they won't bend over time.
Shane
I've tried getting hold of Jeff M for weeks now, can't even get any more than the automated response. How much for one of the pipes reman'd?
-- Lee
Quote from: RedZMonte1.75" Mandrel bent X-over w/ ss braided flexes $375 Shipped +stock x-over
2.5" mandrel downpipe With SS Braided flex. $155US Shipped
shane
Prices......
Jeff M is right about a 3" pipe being overkill on a small V6. These V6's, (even the turbo'd ones) need a little amount of BP to help scavange the exhaust gases. And velocity of the gases has alot to do with it. Becuase it helps PULL burnt gasses out of the system.
For example, Say you have 2 1/4" pipe with 500 CFM of exhaust gas flowing thru it... The velocity of the gas will be constant at so many feet per sec. Now if you replace that 2 1/4" pipe with a 3" pipe, you are still moving 500 CFM of exhaust gasses. BUT the velocity of the gasses slows down. If you replace a 2 1/4" pipe with say a 1 3/4" pipe, again, you are still moving 500 CFM of gas but the velocity of the gas will increase.
Thus small pipe = higher velocity
large pipe = lower velocity
The size of the pipe will also be a factor in the amount of backpressure, But keep in mind that bends in the pipe also fit into the BP equations.
Too small a pipe will be too restrictive, while too big a pipe will allow too much loss in BP...
:arrow: Bigger is not always better :!:
Quote from: Gearhead43Jeff M is right about a 3" pipe being overkill on a small V6. These V6's, (even the turbo'd ones) need a little amount of BP to help scavange the exhaust gases. And velocity of the gases has alot to do with it. Becuase it helps PULL burnt gasses out of the system.
For example, Say you have 2 1/4" pipe with 500 CFM of exhaust gas flowing thru it... The velocity of the gas will be constant at so many feet per sec. Now if you replace that 2 1/4" pipe with a 3" pipe, you are still moving 500 CFM of exhaust gasses. BUT the velocity of the gasses slows down. If you replace a 2 1/4" pipe with say a 1 3/4" pipe, again, you are still moving 500 CFM of gas but the velocity of the gas will increase.
Thus small pipe = higher velocity
large pipe = lower velocity
The size of the pipe will also be a factor in the amount of backpressure, But keep in mind that bends in the pipe also fit into the BP equations.
Too small a pipe will be too restrictive, while too big a pipe will allow too much loss in BP...
:arrow: Bigger is not always better :!:
We have plenty of backpressure, in fact we have too much backpressure.
Let's generalize and say we have twice as much backpressure as boost(most factory turbo cars have around a 2:1 ratio). So, if you have a TG chip and are running around 11-12 psi then we have 22-24 psi of backpressure between the exhaust valves and the turbine. This a big problem bacause of exhaust gas reversion. The exhaust backpressure far exceeds the intake manifold pressure and there is actually reversion of exhaust gases into the intake manifold. This is why most turbo cars do very well with a factory cam, because factory cams don't have a lot of valve overlap so this fights the exhaust gas reversion. So if we have 22-24 psi of backpressure before the turbo and then another 4-5 in the turbo-back exhaust then that would make it 26-29 psi of total backpressure. So, why not just put on a huge turbo-back exhaust and get rid of the extra 4-5 psi. Most aftermarket turbo companies that make exhausts use 3" or as big as will fit. :twisted:
Now, will this make our cars spool faster. Well, it should but the problem is that our boost is computer controlled over 4 psi. Our turbo spool-up ~4 psi(since that is our wastegate actuators pressure setting) and then it's controlled via the computer using the wastegate solenoid. The solution is to simply run a manual boost controller, but it's comes at a price. The computer can pull boost down to ~4psi in an excessive knock situation, possibly saving your engine. 8)
I have a couple of questions/comments...
Do the billows you are using have an insert, or are they rippled causing the exhaust to swirl, disrupting the smooth Exhaust flow. :shock: :shock:
Are you using the JCWhitney billows which have mild steel flanges instead of stainless attachment flanges??? Your welds look extremely large, tending to make it look like dissimilar metals...
:shock: :shock: :wink: :drinking:
3" downpipe is overkill and will not gain you anything on our little turbos. 2.5" is more then sufficent for most turbos, again unless your running insane ammount of boost ~24+. Our turbo's will not be efficent most likely after like 12-14psi. If you run enough boost to require a larger downpipe then 2.5" then you are going to need a larger turbo before anything.
i use SS flexes. Not from JCW. It is all made of I belive T409 Stainless. mine is Mig welded. The ones i will be making i told my guy i wanted tig welded. so the welds will be nicer then what you see here.
Shane
RedZ
I sent you a PM last week about a downpipe!!!
I would like to make a Buy
let me know
so did you ever hear back from Shane :?:
I did
but i haven't bought anything yet......
he was supose to give me more info on payment options and stuff but nothing yet.....
Has anyone bought the Downpipe and/or Crossover from REDZ yet????
I wanted a down pipe............ :?
Dave do you want one of his, or are you just after a stock downpipe??????
I wanted the one he has posted in this thread.....
the 2.5 SS one......
I have a stock downpipe but would to go larger to go along with my 3 inch exhaust system.....
I guess i will have it made at a shop here
so did he just disappear again or what? :?
seems so
i was going to buy a down pipe from him and..........nothing when i asked where and how to send the money.... :?
dunno whats up
Won't be the first time from what I've heard. Well Davie, at least you didn't send him the money already. Then you'd be pissed. :shock:
true dat............ :x
well i dropped off a TGP intercooler with him last month when i sold him my TGP charge pipes and crossover pipe - he told me he could sell the IC quick. i've met up with Shane like 3 times now and have even been to his house (he has some very nice cars btw). i dunno...if he hasn't sold it yet i'd rather just get it back and ebay it off myself. it's not a big deal at all...but maybe i should just give him a call...
Is he still MIA??? I want to buy one of these downpipes because the more I look at the stock one the more it looks like it sucks, but I can't buy one 'cause he's gone.
Shawn
ya gotta wonder........im glad i didn't buy.............
monte! you get my message?
he hasn't responed to any of our messages!!!!!!!
your not alone.....
some business man..... :roll:
Now that he SEEMS to be back. :roll:
Has anyone here had any bad business dealing with him?...or does he just propose to build something...get everyones hopes up...and disappears into the Colorado sunset? 8)