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Twin engine GTP project progress thread

frosty said:
I could care less what turbo you use. I just want to see a twin engine ******* grand prix doing retarded burnouts and launches. You sir make me happy.
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LOL.

It will be twin engine supercharged at first. Turbo is for next year.
If I only I wasn't so busy to complete. Back from a snowmobile Race in New York.
 


Sub'd don't give no isht about the turbo lets see the build, if you want to make one for yourself with 6262's do it but this is his thread to be proud of not bashed...
 
SnowTh1ef said:
Any updates?
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We worked a little on the suspension. Just a few hours since the last update.
Shop's been ultra busy with drag snowmobiles and custom trail sleds.
I will try and find some time to complete, if I don't finish before winter hits I will be very dissapointed.
All we need is a few days of work and we're done.
 
GM did something similar to this in the 80's on a Chevy Citation. Since the rear end of a Fiero is the front of a Citation, they took the rear back from the Fiero and put it in the rear of the Citation. Two 2.8 Liter V-6engines.....1 pushing and 1 pulling. They never released any numbers as it was one of the many weird prototypes they dont release much info about.
 


SnowTh1ef said:
Two Boosted 3.8's will be much more badass. Excited to hopefully see this thing on a track fairly soon!
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It's not looking good.
We have so much work at the shop I can't even give a day's work on it.
If it ever slows down before there is snow I will finish it.
 
welcome to the club bud!

what a long strange trip its been... we are currently finishing off the new rear powerplant and gathering more 2nd gen W suspension parts for when we redo the tube frame chassis...been sorta looking at a double A arm seup for the rear since we can go clean sheet

enjoy the rear throttle cable...we went through 23 different setups before we found one that worked okayish. now we are switching to 04+ dbw for the rear that will let us use a switchable hand throttle/foot throttle.

from experience....for just cruising around and shocking people (you'll love the looks you get when people hear the rear engine start) linking the throttles is plenty fun and quite predictable.

however for the strip/track there is a huge benefit to independant throttles as you can limit front wheelspin while applying power at the rear.

you have complete control over making the car oversteer/push with a bit of practice.

we've spent over 10 years building the 442, stick to it....id suggest maybe not going as overboard as we did....but we are paying homage to a legend so ****it

youll have a blast with it but youll sweat your brains out... lol

Regards, James
 
Turbocharged400sbc said:
welcome to the club bud!

what a long strange trip its been... we are currently finishing off the new rear powerplant and gathering more 2nd gen W suspension parts for when we redo the tube frame chassis...been sorta looking at a double A arm seup for the rear since we can go clean sheet

enjoy the rear throttle cable...we went through 23 different setups before we found one that worked okayish. now we are switching to 04+ dbw for the rear that will let us use a switchable hand throttle/foot throttle.

from experience....for just cruising around and shocking people (you'll love the looks you get when people hear the rear engine start) linking the throttles is plenty fun and quite predictable.

however for the strip/track there is a huge benefit to independant throttles as you can limit front wheelspin while applying power at the rear.

you have complete control over making the car oversteer/push with a bit of practice.

we've spent over 10 years building the 442, stick to it....id suggest maybe not going as overboard as we did....but we are paying homage to a legend so ****it

youll have a blast with it but youll sweat your brains out... lol

Regards, James
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Hi James, thanks for sharing. If you have any more insights on things you wasted time on, or improvements you made, let me know.
I wish our busy season didn't start this early, it sucks not finishing a project in time.
I now have to resort to driving my spare parts GTP car and laying 300 feet burnouts everytime I leave the shop.
These S/C love the very cold and dry winter air.

Although our snowmobiles are plenty fast to make any street car feel really slow. We are recording 0-60mph in 1.7 seconds with datalogging on ice.
500HP+ in a 775lbs machine does that.
 


TwinV6GTP said:
Hi James, thanks for sharing. If you have any more insights on things you wasted time on, or improvements you made, let me know.
I wish our busy season didn't start this early, it sucks not finishing a project in time.
I now have to resort to driving my spare parts GTP car and laying 300 feet burnouts everytime I leave the shop.
These S/C love the very cold and dry winter air.

Although our snowmobiles are plenty fast to make any street car feel really slow. We are recording 0-60mph in 1.7 seconds with datalogging on ice.
500HP+ in a 775lbs machine does that.
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everything is a waste of time lol
we've been through several iterations of the current setup and are now finally getting the two new powertrains together....but we still have more chassis work to do...
whole lotta fun

darkhorizon said:
And the dreams with no expected completion...
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we've been working on our heap for a while now...oddball **** always is harder/longer to build...its not retard easy like a 3800 in a fiero...:th_laugh-pointup:

but there are craploads of projects out there that never get completed so i see your point...

hows your jalopy doin?
 
As far as the turbo argument I have to agree with DH, you can do whatever you want on a Z1 motor and it doesn't remotely relate. Your never going to run 54 psi on a 3800 although if you do try video it so I can see. In the little research ive done about turbo **** for these 3800's its obvious, you need a much bigger turbo that can flow decent air at a lower pressure. Not like a 4g63 or z1 where you can just keep turning the boost controller up.
 
Turbocharged400sbc said:
everything is a waste of time lol
we've been through several iterations of the current setup and are now finally getting the two new powertrains together....but we still have more chassis work to do...
whole lotta fun


we've been working on our heap for a while now...oddball **** always is harder/longer to build...its not retard easy like a 3800 in a fiero...:th_laugh-pointup:

but there are craploads of projects out there that never get completed so i see your point...

hows your jalopy doin?
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Theres a difference between a guy like you and mr zero posts. If I had a dollar for every hour I've spent helping someone work on a 3800 related project only to have it just eventually get parted out or sit around i'd be rich.

Your never going to run 54 psi on a 3800 although if you do try video it so I can see.
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Its not nearly as eventful as you think. On these motors the valve float will stop you from doing anything too dangerous.. Ive ventured pretty high a few times and its not all that insane. There is no reason to look at trying to put the mathematically wrong turbo on a motor and call yourself "smarter than everyone thats ever turbo'd a 3800".
 
I like the misconception of boost equaling power. It makes me giggle every time I think about it.

Then again, who needs flow when you've got a pretty little boost gauge, amirite?
 


"random guy at a car meet" : how much boost are you running?!?!?
me: usually like 28
"random guy at a car meet" : holy crap wowowowow
me: It basically makes the same power on 18....
 
darkhorizon said:
Its not nearly as eventful as you think. On these motors the valve float will stop you from doing anything too dangerous.. Ive ventured pretty high a few times and its not all that insane. There is no reason to look at trying to put the mathematically wrong turbo on a motor and call yourself "smarter than everyone thats ever turbo'd a 3800".
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Not at all what was said...

I had it on shelf, it would work pretty well. A stock 3.8 makes 200HP ! That turbo is perfect for engines making 140-200HP N/A
Sure it is on the small side for a 3.8 V6 but it will spool very quicky. There are better choices with larger turbines but not for me, it was free on the shelf. You are too sensitive and took the statement literally.

As for the 1100cc no one has made more testing than us. Nearly a thousand dyno pulls on many different turbo sizes for different application.
trail riding, drag racing, lake racing, top speed/radar etc...

Stock turbo, 2860, 2871, 3071, 3076, GTX3076, Precision 5830, Precision 5130, Precision 5530, VF45, and many hybrid turbos.

I know very well how to choose a turbocharger and what happens when you have too much turbo (Surge or lag) or not enough (Surge or extreme backpressure/low power output)

It always comes down to similar things.

A 3.8L V6 doesn't need as much boost to make 600HP, no doubt. Nor does it require the same turbocharger, no one has or should claim that.
A 3.8L needs a larger inducer on the compressor wheel and needs less pressure ratio ability than our 1100cc engine does. It also needs a larger turbine wheel because of the torque available at low RPM (Exhaust pressure)
 
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