I know this subject has been beat to death, but I am very interested in doing a twin turbo project on my 91 vette. This is probably the only board I go on CF. A lot of people are going to surperchargers because it seems like it is to hard for a twin turbo project, but superchargers have parasitic belt loss, and also with high boost the belts slip! Turbos are much more efficient, are more driveable, and can make much more horsepower! Since there are not any good shops around here where I could have a turbo kit made, or atleast the exhaust manifolds, I have been doing a lot of research on companys coming out with turbo kits for the C4, I have found these two companys that don't seem to be mentioned at all, only the Gale banks system and the STS system.

LT1 Twin Turbo kit (coming soon) - http://www.high-techracing.com

L98 and ZR1 Twin Turbo kit (jan. 04) - http://www.turbochargedpower.com

I know the Gale Banks kit is coming out for a few more months, and people wish it would come out sooner, well the one turbo kit comes out next month! That company (turbochargedpower.com) seems to put out some nice kits for the mustang, and I can't wait to see what their L98 kit looks like. Hopefully these kits will be as affordable too. I was just wondering why everyone is going after the Gale banks and STS kits? I am just trying to find all the kits and get an idea of what we are looking at. I know there are a lot of people on this forum that are very interested in a turbo kit, I am just trying to give my .02 cents and also want to hear other peoples opinions. Now its time to start getting serious about turbo projects, im sick and tired of just talking about them, I am ready to do one.

Also, I am curious to what motors you guys are going to have if you intended to do a turbo project? There is a guy with a thirdgen camaro who has a 400 block with a 327 crank, running a 352CI and he is looking to spin up to 8k! That is a bit much for me, especially since my car is going to be street driven. What about a 400 block with a 350 crank? 377CI? Big bore, short stroke motors are perfect for turbos and reducing the amount of turbo lag. Although, I have heard problems about 400 blocks leaking coolant? It would probably be better for me to keep my stock 350 block, splayed 4 bolt main, and run a 383 with a decent sized bore? Also I was considering running the zz409 cam or a little bigger comp cam with AFR 195 heads. Mostlikely a miniram and 8.5 compression ratio. I am just trying to get some ideas, and everyone else's ideas together to come up with a solution that works. Pretty soon I am going to buy a 350 block(since my car is my daily driver) so I can start building up the bottom end. So any input would be greatly appreciated, bu no flamming please. Sorry this is so long too!





[Modified by Red91Vette, 5:55 PM 12/20/2003]

 

45+ views and no responses?

 

you are wasting your time on those companies. High Techracing has been saying they have an LT1 vette is in the process of installing a Twin turbo.
That statement has been on their website for how long already?? 4-5yrs ago? My question is where the heck is the TT vette? Turbochargedpower is also a new kid on the block that also promise a TT C4 vette but have not seen it by any one yet.

Gale Bank are right now seem to be the only one that actually making and testing TT on the C4 vettes. Should be on the market very soon. If you want a TT so bad and don't want to wait. Then a custom build TT is only possible if you gotta the doughs.


Bruce
383LT1 Supercharged

 

I agree with you there, I saw in a magazine a few years back about that kit being made. I doubt it will ever be produced, but that was for the LT1 anyway, so it didn't effect me. I am still considering the kit from turbochargedpower. There was a post on them a little while back, I remember a forum member had his ZR1 in their shop, maybe another C4, can't recall, but that is promising to know that atleast they have vettes in their shop.

I don't really like the Gale Banks turbo set up, don't get me wrong, its a nice kit and all, but I want the turbos out of site. I am looking to do a turbo kit similiar to the lingenfelter C5 one, mounting the turbos down low and outta site, the perfect sleeper. I would love to be able to have a single turbo instead of twins, with a V8's exhaust output, you could make insane power and high top end. I just dont know where to mount the crossover tube at? The STS kit has the turbo mounted low and outta site, but I don't like the idea of having it back by the rear end, too far to travel for the exhaust and intake. I would have turbo kit made, but I don't have the money, I am building up a motor now and want to get ideas for it. In the near future I should have a sufficient amount of funds for the kit or to make my own.

 

I was directed to this post by a customer whose C4 we are currently designing and building a twin turbo kit on. For all you armchair quarterbacks out there, this is not a simple job, nor one that should be rushed into without serious consideration, research and careful planning. We have been building turbo systems for over four years and have enjoyed tremendous success with them (www.turbochargedpower.com). However, building a kit on a Mustang is like having Carnegie Hall to work in compared to the C4 and C5 Vettes. However, we are coming very close to finishing up the C5 and Z06 kits, and the C4 and ZR1 kits should not be too far behind. We will certainly be posting technical info and photos when they become available. Please be patient with us and the other companies who are trying to meet your need for speed; you will be rewarded for the wait!

Sincerely,

Tom Berry
HP Performance
Turbocharged Power Systems http://www.turbochargedpower.com


[Modified by Turbocharged Power, 3:29 AM 1/4/2004]

 

Well this is kind of funny. This same topic is going on in the ZR-1 net list server. I will tell you what I told them. I will give you complete details when I get my car back from them. Yes I am the one that has his 90 ZR-1 in there shop right now. So Bruce I can tell you that there is at least one shop that is currently working on this and I for one want them to do it right and not rush threw it. I can also tell you that I am happy with them as of know. I am a very picky person and also a mechanic and when I dropped off my car and talked with the guys that do the work. I felt a lot better after that. They know what they are talking about and didn't try giving me any B.S. I can also tell you that my was not the only vette that was there getting turbos on it. I also saw some of there other work. Anyways I will be sure to give a lot more details as they come. Boy will it be fun testing :D

 

tom,

thanks for posting, very interested in two vette kits, the ZR1, and the 94 LT1.

SGC is currently working on a ZR1 twin turbo too. perhaps you guys should compare notes!!

the owner of SGC is Aaron Scott and he is SUPER sharp on the LT5 and can give you some great tips. they are working on a "stage I" similar to your kit which will go on the stock short block. at 11-1 cr, boost will be low but with a target of 550 rwhp is will be all that is needed for most!!

later, a "stage II" full build, lowering the compression on a 368 to around 9-1, more boost and way more HP with great reliability.

the LT5 and LT1 are both great engines and very strong.

I wish you the best of luck and let me know how I can help.

I seriously suggest you give Aaron a call
http://www.sgcvette.com has all his info.

if you guys work together, both will benefit!!!

boostamuv in 2004!!

 

For all you armchair quarterbacks out there, this is not a simple job, nor one that should be rushed into without serious consideration, research and careful planning. However, building a kit on a Mustang is like having Carnegie Hall to work in compared to the C4 and C5 Vettes.

:iagree: Man he's not kiddin! lol

 

I love this quote! :rofl: Its so true!

 

Could Bruce's oppinion be jaded by dreams of superchargers.
Just Kidding Bruce :D

 

OK guys, maybe I'm over simplifying things a bit, but in my latest January Hot Rod they show a kit for an L98 mounted on a corvette. Give Nelson Racing Engines a call at (818) 998-5593. It looks like a single turbo unit mounted down low.. (see page 34)... I don't know about the turbos... I know they make gobs of power (just ask John Meanie), but all of that heat scares me to death, especially under a fiberglass hood... As you all have mentioned, the underhood temps of a vette can reall soar as there is just nowhere for the heat to escape. I used to have a 1989 turbo TA and it ran real well, but that turbo got so hot it would absolutely burn the skin right off your hand with the slightest touch.... In the above kit it shows the pass over tube snaking ariund the oil pan... wouldn't that heat the heck out of your oil by being so hot.... Turbos are great and all, but for the street a supercharger will probably make all the HP you reasonably need..

 

I checked out your News page and while there was mention of a kit for the L98 C4s (85-91), I saw no mention of plans for a an LT1 Corvette (92-96) turbo kit. Any reason for this? Thanks....

 

If your talking about the turbocharged power web site look under the smoken deals 2 section.

 

Thanks, found it! Guess I'll have to call to see how many $$$...

 

Turbo? NO Thanks. Who need the more problem.
I 'll stay with my well built cogged drive setup supercharged any day over an experienment turbo and unproving turbo kit. just my .02


Bruce

 

I see your point but out of curiosity, what are the details of your proven supercharger setup? Thanks...

 

Why don't you do a search???
If you really think you can get a a turbocharged vette for cheap price. Than please keep dreaming. Sure there have been done, But it necer a kit available. That means custom . And custom means a lot of dough?

I am happy with my supercharged D1SC blown 383LT1. How is that 18psi sound to you? yeah with no chance for the belt to slip either. Nedd to say more?


Bruce

 

When it comes to performance, I'm well aware of the cost and I don't recall saying or even inferring that it could be done on the cheap. I know better. I also wasn't questioning your premise, I merely asked the details of what you were running. Thanks for providing them. And as for you needing to say more, nope, you've said enough...

 

NO doubt. But thats 18 at redline, not 18 from 2800 to redline. Respective area under the curve is what really matters.

 

I hope this thread doesn't turn into a turbo vs. supercharger war! Bruce, out of curiosity, how much horsepower are you putting up? Do you have any pics of your cog setup? I heard it was really hard to have a cogs setup on a C4. I just never looked into the details, more interested in turbos, but I love forced induction either way.