Twin Turbo Buick GS Project

[Steve]

:biggrin::biggrin::biggrin:



That's a pretty good deal your buddy has on that motor. How many cubes is it and what turbos?

Maybe if I would have known about it earlier we could have talked.

Mine is just about finished. :biggrin:

It is 427 cubic inches. He originally built it with twin 47-88's but later changed it to twin pro mod 91's. The Supra is a 25-3 car also and was just completed in Jan/10. My buddy is still getting the chassis worked out but the car has been high 4.60's with very big MPH(after all it is a Supra!) on 315 DR's. He had talked about getting a twin turbo 600+ inch ProLine BBC a while back but I heard from a mutual friend last night that he had changed his mind and is going with something even crazier than that!!

 

[Bent6]

Sounds like your buddy has the fever pretty bad.

Like most of my projects go, this one has already snowballed a bit. The original plan for this car was 25.5 - then it turned into 25.3. So far I've resisted the urge to hang a pair of 4788s on it and stuck to the plan for the 72s I have picked out for this engine. After all - it's a "street" car. :wink:

 

[Steve]

Sounds like your buddy has the fever pretty bad.

Like most of my projects go, this one has already snowballed a bit. The original plan for this car was 25.5 - then it turned into 25.3. So far I've resisted the urge to hang a pair of 4788s on it and stuck to the plan for the 72s I have picked out for this engine. After all - it's a "street" car. :wink:

They do all snowball some, just some more than others! He had a drag radial Pro Charged Mustang that he sold and then bought the Supra so that he would have a nice street car to drive. It was a low mileage TT Supra that was a very rare color for those cars and then he made a trip to the track and then it progressed to a 25.3 Outlaw Radial Car!

 

[Bent6]

Since everything revolves around the engine, here's a preview of sorts.

Intake manifold - not finished but getting there.

 

[John Wilde]

The front looks similar to a Nelson intake.

http://www.nelsonracingengines.com/the-gallerry/with-NRE-intake-manifold.html

 

[Squid4life]

Wow, great looking intake. This is such a sick build!

 

[88 CuttyClassic]

when i turned 19 my dad gave me my set of keys to his 70 stage 1 and said "this isn;t 1970 anymore....dont get arrested" they haven;t caught me yet!!!

 

[jevans]

Since everything revolves around the engine, here's a preview of sorts.

Intake manifold - not finished but getting there.

Before this build is complete, you may want to add "NWS" to the thread Will...

This Intake is definitely "Engine Porn"


John

 

[SS/GN]

I think you have too much time on your hands,but you sure make good use of it:wink:Eye Candy

Kevin

 

[aminga]

That makes me happy in my pants

 

[drew454u]

1. that car is gonna be incredible.
2. What tranny are you gonna use??
3. That has to be the wildest "street car" car i have ever seen.
4. Where are the parachutes??
5. What colors are you gonna go with??

Good luck and you are right, they did amazing work on that chassis.

 

[pm87tb]

Nice build man... That intake is sweet!!!

 

[Bent6]

Update

Some updates on the chassis build for those interested.........

Frame notch boxed in

Control arm mounting points reinforced/tied into cage

New adjustable UCA mounts

New adjustable LCA mounts

Upper and lower control arms

Believe it or not we're going to have to add a couple of more bars to tie the rear frame rails back into the main cage crossmember to make the NHRA chassis inspector happy. A little overkill IMO but he's the one with the certification stickers. There's a lot more hoops to jump thru to get the 25.3 certification. Once he signs off on it it'll be ready to start welding it all up. Waiting on some brackets for the rear end housing and the plan is to have it back on the ground by Christmas. Delays with the engine have it pushed back to the first of the year.

 

[John Wilde]

Will, this is just getting better and better.

 

[Squid4life]

Looks great Will. A true piece of art! Love the UCA/LCA mounts.

 

[Bent6]

Thanks guys.

Not to tease you or anything but the rear suspension is what's really going to set it apart as far as the chassis fabrication part goes. I doubt many have seen anything like it before - definitely outside of the box.

Stay tuned..............

 

[GlockandRoll]

cant wait, how much will it end up weighing... or could you even guess at this point?

 

[Bent6]

Can't say for sure but the max weight for 25.3 spec is 3600# with driver so we'll have to keep the car itself to no more than 3400#. The LSX engine should come in pretty light and we are going to use carbon fiber pieces in select areas to help keep the weight down.

Here's a pic from Afco's website of the rear shocks we'll be using. Afco M1 Big Guns with remote nitrogen reservoirs. The rear suspension design will have the shocks completely inside the trunk so the adjustments will be able to be made without ever having to get under the car.

 

[jevans]

Good choice of shocks Will...These will look right at home with the rest of the build. You'll be happy with the M1's, the adjustments are endless. Can't wait to see what Alec and John come up with for the mounting of the rear shocks and anti roll bar...

And to think, all of this for a "street car"...

 

[Bent6]

Update

Well, it's been a while but we have made a little progress. Car is back on all fours at what we hope is close to the final ride height. The rear suspension should start coming together next week.

The engine itself is 95% done. Finishing up the liquid intercooler next week and then just waiting our turn to get it on the dyno. We can't do much more with the chassis until we get the engine in the car. Anyways, here's what it looks like right now.