WHO KNOWS MORE INFO ON THIS ??
IT SUPPOSED TO RUN 200 MPH WITH HIS TWIN TURBO
http://www.yearone.com/enthusiast/ar...et/blueta.html

Supposedly it was built to test the F-car chassis under extreme speeds. At least that is what Pontiac claimed. Who knows why it was really built.

What is interesting to me is the fact that the Twin Turbo TA is using the stock TPI plenum. Makes you wonder about all the TPI sucks at over 4500RPMs comments. Pontiac apparently felt that there was a way to work with it on such a powerfull engine.

Other than some article I read about the car along time ago I can't really tell you anymore than that. Personally I think that Pontiac was experimenting with forced induction on the L98 platform. Many forced induction experiments were conducted during the 80's to determine if it was viable on a factory vehicle. In 1981 they had the Turbo TA with the 301. But I think that was an attempt to get the modest power plant to a drivable spec while producing as few emissions as possible.

Of course today it is not uncommon to see vehicles on the road that have turbo or superchargers. Granted they aren't particularly powerfull and only run a moderate amount of boost.

Things change when you pressurize the air.

Saw an 89 with a Paxton supercharger and no one bid that I knew of. Was only going for $9000 or so I think.
The really funny thing is the last year of the third gens would be getting that done. The LS1 and LTs came along soon enough

Bill

plenum us no where near stock, its oval shapped with no runners. Just has the same style fins on top to look like it at first glance.

Right. A TPI unit isn't that great when the engine has to suck in its own air and fuel, but when you have something forcing air and fuel in, the whole game changes.

If you look in the photo of the close up where you can see the plenum looks like an early attempt at an LT1 intake but rounded and made to sorta appear like a TPI. So if it was LT1 style it would allow over 6K RPM.

That particular car was built to test the extreme HP limits that the 3rdGen FBody chassis would tolerate; the car still sports its GM/Pontiac experimental tag under the hood. As I recall, the engine produces somewhere around 600 HP, but was decently streetable. It also features a complete Corvette IRS in the back end.

The fastest speed I've heard of that car attaining first-hand was 175 mph....

Jim Mattison offered me a ride in that car at Road Atlanta in 1998.... like an idiot, I didn't take him up on it. Pontiac still maintains it in their Historical Collection to this day.

The interior pic is not from that car, but from the GTA wagon parked next to it in the large photo.

So if I supercharged or turbo charged my engine I would be able to use a moddified stock TPI plenum on say a 383?

It may be a retarded question. But I am wondering.

You can. I think you should do a search for posts by Willie. Of course there is always something to be gained by using something better, but the TPI becomes less of a problem when you force air down its throat. Its more of an efficiency thing rather than some sort of RPM or HP limiter.

That blue bird did break 200mph. Unless Year One is misquiting, or misinforming. I don't think that would be very wise to misinform people though.

Here is the quote
Source...

I can believe that a strong enough engine with two twin turbos running enough boost could do it.

What I want is more details about suspension and engine internals and frame re-enforcment to make that happen.

The new Porsche GT out this year for $400,000 plus is just over 600 horsepower and utilizes rear wheel drive V10.

Not a bad goal to shoot for from a V8!
Bill

The interior pic with the three spoke wheel? Is the Kamm car a late third gen as well? They were building the wagons for years...seems strange to me

Bill

No, Bill, the GTA wagon was built from a 1985 Trans Am; there were two built originally, but only this one survives. Whether or not it is the same car that graced the cover of Motor Trend in '85... I haven't been able to get an definite answer on that. The MT car had a gray interior though, so this car may in fact be the second one that was built.

It was converted to GTA trim at some point after the GTAs were introduced in '87. It does still sport its vented fenders as a clue to its original configuration

The seats are the Recaro buckets that were available in '85, I think. Somebody here knows more about that than me, but they are extremely nice. I like them better than the Ultima seats my GTAs have, that's for sure.

There was a 82 T/A built by a Banks guy, I got a old Car & Driver with it in there, made 611 bhp, twin turbo. Was red, 2.43, or some LOW LOW gear. They wanted 200 mph, but only got 198 before they ran out of time to publish.

that is a very nice color...

do you know what color that is frankie?

now that i know that a 91 gta will hit 200 without lifting off..i have to get to work lol

I can't recall specific years, but pretty sure they did some stationwagon mods to the second gens as well, but most know them form the 82 and earlier Vettes. Woulda made an interesting late model Vette conversion.
Off the topic of twin turbo for a sec... My friend's dad had an 89 Corvette 'vert and while lacking the back seats and space of a third gen F car, the interior is super nice in my opinion and the rear top latches in two locations versus one for the F cars... Don't know why we got a bum deal there