Hey guys.You all are a wealth of info & I appreciate all your swift answers.
My question is,will callaways stock exhaust manifolds & turbos(1988-1991) fit under the hood of my 1994 lt-1 coupe with automatic?
Also if it will where can I find a set?
Nothing sounds cooler than a turbo vette!
I am thinking about doing a 383 stroker & possibly supercharge or a twin turbo set-up would be slick-not too many corvettes have them(c4s).
Anyone here have done a twin-turbo set-up & what is involved?
I know everything should be forged,but what else should be done?
My car is in amazing shape & would like a unique set-up that is fast & reliable(low 12s in quuarter).
Either I spent the money on this or buy another corvette(c6 or c5 zo6).
Thanks in advance!!!!

 

I've spoken with Chris @ Callaway personally - they reserve all of the B2K (Twin Turbo) components for the Callaway Certified cars, so your best place to get the parts would be from a used or wrecked B2K car.

The B2K components fit on the L98's without a significant hood modification, but they couldn't breath - that's why they made the tri-angle air inlets.

 

I'm sure with a bit of work, Callaway manifolds and turbos would fit under the hood of an LTx car. However, you'd be much better off selling your car and buying a Callaway or going with a supercharger kit for your car.

The 2,000 or so parts that make up the Callaway turbosystem would cost you $20k+, if you could get them - Callaway Cars only sells replacement parts to registered Callaway owners. And, you'd have to spend a lot of time and more money adapting them to the LT1, so much so that you'd be better of buying a complete car.

 

Those were on the first year only ('87) and fed air to the intercoolers. The intake air is taken from the stock airbox in front of the radiator. The '88+ cars ducted air to the intercoolers from beneath the bumper and did away with the hood vents.

 

Thanks guys for your answers.I did not know calloway only sells to calloway owners.20k to install for parts only?I could do job myself,but 20k is alot.I just thought lt-1 twin turbo set-up would be the s**t.It seems everyone has a supercharger or 383 set-up-time to wake up & jump on the "bandwagon".I like my car & the newer style of interior/exterior to the older c4s.I know they did make a 1991 model but if I bought that I would not drive it.It is a collector & not something someone should drive the hell out of.I just heard here that lt-1s handle alot of boost because of iron block.

 

When Callaway did their setup, they cut a section out of the frame rail which was later reinforced.

Can you put that setup on an LTX?
Anything can be done with enough time & $$$

There's forum member with turbo LTX cars over in the FI section.

Personally I'm going with a supercharger, it's just easier to install.

 

Here is one Nelson Racing worked on. Bring a Callaway and a large checkbook.
http://www.youtube.com/watch?v=forDELWZjFc

 

I think it's best to point out the "search" button on this particular topic (even though I am always happy to voice my opinion...lol). Only because of the depth of the questions that you've got.

it's not going to take $20k for you to twin-turbo your late model c4. I don't even believe it would cost that much if you went with authentic callaway stuff. In my opinion, there are a lot of talented shops these days that will be able to better package the turbo kit for you and probably yield far better numbers than the callaway cars had been rated.

namely:

-nelson super cars (these guys did a customer twin-turbo build)
-Rad rides by Troy (currently doing the "time machine", which is John Meaney's corvette'-although his car is an l98).

the above vendors are the top-dollar shops that have a serious reputation for mega-buck builds.

there is a local (to me) shop that recently did a twin-turbo Lt4 (true grand sport) recently.

the shop is called Forced Air Tech (in Phoenix, Az)

I have no experience with these guys, I've heard about them a few times in the local automtive community, but that's about it. they did quote me $10K to do a COMPLETE custom twin-turbo kit for a late model c4 while retaining AC cruise control etc. Not bad for doing NONE of the work myself.

The Lt-x platform is not too boost friendly. Actually, it's got high compression and weak internals. the only saving grace is the reverse flow cooling system. Otherwise, the bottom-end should be beefed up before going to town on a twin-turbo kit.

the goal that you've got in mind CAN and has been achieved with just an engine build (if the engine build is within your alloted budget). There are a hand-full of guys on here that have gone deep 11's and high 10's all motor.

the next cheapest route would be nitrous (on a build bottom-end, or a mild shot on a stock bottom-end). Depending on how often you use it, it would prove to be the "best bang for the buck".

there is also a few guys that have gone single turbo on the forum. locating the turbo in roughly the same spot as the superchargers are placed on these later c4's. Chris (lcvette) has definitely proven that a single turbo is more than up to the task with this 700-900+ horsepower examples. He ha snow chosen to go with the Ls-x platform.

if you're going to go with a supercharger, it seems as though the vortechs are slightly more common here on the forum. I really like the transmissions on the prochargers though (4.10:1 all the way up to 5.x:1 with the F1 head units). this means that the prochargers will get into boost MUCH sooner than the vortechs (the t-trim's have a 3.65:1 if I recall correctly). Although it's been said that the procharger bracketry is not quite as decent as the vortech brackets and NEITHER are sufficent for more power down the road (belt wrap, number of ribs, etc).

In my experience in the supercharged crowd is to stick with a reputable vendor, and one that is dedicated to your platform....i.e.

Greg Carrol of Blower works!

if you want a COMPLETE kit that is well thought out, with all the bugs worked out of it, Greg is definitely the go-to-guy!

Also, anyone that has a serious turbo build on this forum has inevitably gone to a stand-alone computer system (Big Stuff 3, FAST, Accel, etc) you'll have to figure in the cost of the standalone if you're serious about turbos and the proper engine management.

 

Just to answer the OP's question, I believe they moved some stuff around? I want to say they relocated the starter, and had some nice aluminum pieces to move it. But maybe I'm confused... I seem to recall seeing pictures of some of their aluminum brackets that were finished a brilliant blue to relocate some stuff to make room for the turbos.

 

Get in touch with lcvette here on the forum. He can build you a turbo kit for less than 10k that will make as much power as your shortblock can handle.

His LT4 made 940rwhp.

 

I have a friend I race with that has an 89 Callaway aerobody. He just bought a used set of exhaust manifolds for $2500 for future use as a spare. The parts are getting hard to get and very expensive. The frame piece that was sectioned was called a "wonderbar" by Callaway. It was the bar above the rack and pinion that was used to carry fresh air to the intake because everthing fit so tightly in the engine compartment.