Twin engine GTP project progress thread

**Scottydoggs** · 06-11-2014

damn impressive! now to make the tranny bullet proof.

gmrbadass took a gtp and turbo'ed it. i think he only added rockers with the turbo and was running it around 16 psi, he was quite happy too. then the tranny started to take a dump. and it was adult owned car from day one with only 78,000 miles on it. and serviced more then regularly. guy was anal lol

**TwinV6GTP** · 06-11-2014

Yeah tranny worries me too. What broke in his trans ?

Sent from my iPhone using Tapatalk

**Scottydoggs** · 06-11-2014

nothing really broke, it just started to slip. gregs one of them guys who can rebuild a tranny, so it was no big deal for him as he want to rebuild it anyways. just had to do it sooner then he wanted i guess.

hes the guy whos now got the pjr whipple car.

**wyoprix** · 06-16-2014

i like it always wanted to build a prix with a rear engine sorta like a feiro never thought of running 2 engines your ****ing crazy i like it

**TwinV6GTP** · 07-10-2014

Ok now with the success of my two Turbo Grand Prix, project twin engine is in full swing.
We'll update pretty often from now on.

We are in the process of completing the turbo kit for the rear engine. Front engine was already modded with 2.6 pulley race fuel, adjustable regulator so for now it will be one turbo engine one supercharged engine in the same car !

We are also doing a little paint job for the car. The plans for the cooling for the rear we'll put a stock radiator near the trunk lid. We'll have two grills in the trunk lid for the hot rad air to come out.

**97AutoXVette** · 07-10-2014

Keep posting pics! Definitely interested in seeing the radiator/airflow setup in the rear.. Not to mention the turbo setup

**TwinV6GTP** · 07-10-2014

Rear engine turbo intake mani

Sent from my iPhone

**Grandprix202** · 07-10-2014

I'm guessing all custom made?

**TwinV6GTP** · 07-10-2014

Originally Posted by Grandprix202

I'm guessing all custom made?

yes custom made, but that intake would work with the front engine too.

**TwinV6GTP** · 07-10-2014

The box below are my slotted and drilled disk brakes for my 07 GT. They look great btw... big change with the rims I have.

**darkhorizon** · 07-10-2014

why would you make an intake significantly worse than the ones that come stock??

**TwinV6GTP** · 07-10-2014

Originally Posted by darkhorizon

why would you make an intake significantly worse than the ones that come stock??

What in the world makes you a reference in web flow bench testing ?

That intake works wonderfully on my daily driver. Better or as well as the na intake on the parts car.

Sent from my iPhone

**TwinV6GTP** · 07-10-2014

Sent from my iPhone

**97AutoXVette** · 07-10-2014

Damn... That's awesome.. Makes me wonder, on the other thread you have going about the turbo 11 second build.. Do you use stock exhaust manifolds on it or P-logs??

**TwinV6GTP** · 07-10-2014

Originally Posted by 97AutoXVette

Damn... That's awesome.. Makes me wonder, on the other thread you have going about the turbo 11 second build.. Do you use stock exhaust manifolds on it or P-logs??

11.00 @ 129 mph stock manifold (untouched)

**TwinV6GTP** · 07-11-2014

Hey guys, just so you know. I'm not trying to say none of the upgrades are useful.
P-Logs replacement of the front manifold is a big gain on a S/C set up or a very large turbo set up.
In my case, for my daily driver and the parts car when it ran 11.00 had a small turbo with a small opening. Going to a P-log would not make much difference as the main restriction is the turbine of the turbocharger.

Also I run a bone stock engine for the simple, it's cheap and easy and gives me the results I want. I have to run a little more boost than guys running higher flowing set ups but in my case it's perfectly fine. I'd rather enjoy my car more often with doing as little work as possible. So far it's been very good to me. The main limitation in the car itself is the transmission. So why would I need any more power I can already make the trans slip if I want by cranking up the boost.

So all in all, I'm waiting for the projects to become bottlenecked to the point I HAVE to buy a built trans to go faster or buy expensive lightweight parts... That's where I am now.
This is why I am building the twin engine project. Since by splitting the weight in two between two completely independant drivetrains I will put less stress on each transmission and therefore go quicker.
Although the rear engine is going to have so much traction, it's bound to hit that wall quicker, I expect Solid 9 seconds out of the twin engine, once both engines are turbocharged and working well.

At this point if you really think about it, take out all of the work and R&D of course, maintenance wise, this car will be cheap as hell for such a quick car. 500$ engine, 300$ transmissions...

**darkhorizon** · 07-11-2014

Hey guys, just so you know. I'm not trying to say none of the upgrades are useful.
P-Logs replacement of the front manifold is a big gain on a S/C set up or a very large turbo set up.
In my case, for my daily driver and the parts car when it ran 11.00 had a small turbo with a small opening. Going to a P-log would not make much difference as the main restriction is the turbine of the turbocharger.

Also I run a bone stock engine for the simple, it's cheap and easy and gives me the results I want. I have to run a little more boost than guys running higher flowing set ups but in my case it's perfectly fine. I'd rather enjoy my car more often with doing as little work as possible. So far it's been very good to me. The main limitation in the car itself is the transmission. So why would I need any more power I can already make the trans slip if I want by cranking up the boost.

So all in all, I'm waiting for the projects to become bottlenecked to the point I HAVE to buy a built trans to go faster or buy expensive lightweight parts... That's where I am now.
This is why I am building the twin engine project. Since by splitting the weight in two between two completely independant drivetrains I will put less stress on each transmission and therefore go quicker.
Although the rear engine is going to have so much traction, it's bound to hit that wall quicker, I expect Solid 9 seconds out of the twin engine, once both engines are turbocharged and working well.

At this point if you really think about it, take out all of the work and R&D of course, maintenance wise, this car will be cheap as hell for such a quick car. 500$ engine, 300$ transmissions...

YOU POST SO MUCH WRONG CRAP ITS STUPID. MY GOD. I am a person that prides himself on doing things cheap, but you are just a flaming hypocrite about it. You spent THOUSANDS of dollars more to run that 11.0 than I spent to run 10.9, so stop acting like an authority on it.

I cant post now, but litterally everything here is wrong.

**TwinV6GTP** · 07-11-2014

Originally Posted by darkhorizon

YOU POST SO MUCH WRONG CRAP ITS STUPID. MY GOD. I am a person that prides himself on doing things cheap, but you are just a flaming hypocrite about it. You spent THOUSANDS of dollars more to run that 11.0 than I spent to run 10.9, so stop acting like an authority on it.
I cant post now, but litterally everything here is wrong.

You went 10.9 in a RWD rear engine Fiero, just the car plus the parts to build the project, you broke the budget for the parts car...

What is wrong is most of things you've said about my project before I ran the times I did. Now your angry because you've been proven wrong.
No one that I can see as ever taken as much stock parts to that limit before. I wanted to prove it could be done, because I hate the negative attitudes many throw at others because of their own failure. It doesn't mean you failed at somethings others will.

You went a different route yourself.

And yes the parts car was a super cheap build other than the time to build it. The turbo cost me nothing, it was sitting at the shop for a year because it wasn't right for most other projects we worked on. Now that turbo is going in the twin engine set up, so it was no money lost. Almost everything I put in the parts car was reusable for a better more extreme project.
Everything was calculated and it worked out perfectly.

So buzz off with your negative attitude.

**Timing** · 07-11-2014

lol dh just wont give up trying to put you down. You have done what others have not or said that couldnt be done and i dont see anything your saying to be false at all. I cant wait to see the results of this twin engine build. How are the engines going to sync with each other?