LS4 Performance - LS4 GXP Turbo & Tranny build up project

Hey All,

After doing much comparative research, I've clearly been able to decide that going turbo is the best bang for the buck.

So my project begins.

You can follow it on facebook if you like.

http://www.facebook.com/pages/Pontiac-Grand-Prix-GXP-Turbo-LS4-Project/141735545854397#!

I think you will find this an interesting build. Not only are we updating the car from an E40 to an E67 PCM, but I have also agreed to let the car be use in 2 R&D projects once its complete.

Im certain you will find it interesting. Posting pictures as we go.

This build will also produce an affordible yet scalable Turbo Kit.

Cheers

Is your car the black gxp up at Kevin's place?

Looks cool to me.

-Mike

I'm following on FB. Be sure to join the LS4 tech group if you haven't already.

Hey All,

After doing much comparative research, I've clearly been able to decide that going turbo is the best bang for the buck.


Turbo is the bets way to go. I'm curious to see what one of our LS4's would do with a stickies, stall, with bolt ons and juice.

Look at Rossko's car then. He has all of that. He just needs to tie it all in together. Once that happens, watch the eff' out... lol...

-Mike

Hey Guys,

Sorry I've taken some time to re post here. Work... you know... busy ugh.

Dieselpump - Yup thats my beast at Kevins house of Horse Power :)

Alabamaguy - Yes I found it and tried to join. Couldnt get it. :(

Work on the car is moving along well. Im quite please with Kevin and
the Cartuning staff.

Coming up later this evening are photos of the first R&D project being done on the car. Kevin is responding to his customers and creating a non ic version of his turbo kit for the LS4 crowd. The first photos of this will be posted on my Facebook page later this evening. I've already seen snippets of this myself and it looks very cool indeed. Kevins got a plan to cut the kit up into various stages and make it more affordible. This way we can go turbo from small to big as our cash on hand allows. I think he has a great concept going. From all the research I did, this is indeed the kit to have so anything to put it in reach of everyone is a big step forward.

Also coming up is the final verdict if the E40 to E67 pcm swap will fly properly.

After the non ic kit has been dyno'ed a second R&D project will also begin on my car. Stay tuned to my FB page for updates.

I see some of you already there, which is great. Very glad to have you on board.

This shit is just too much fun to not share it. :burn:

Cheers

Cartuning

I don't see a turbo in the last pic posted WTF! HAHA j/k looking good man keep it up.

Kevin and Cartuning definitely know what they're doing!

No shit right :D the one vid on there of the gxp at 654whp on 12psi :hump:

I don't see a turbo in the last pic posted WTF! HAHA j/k looking good man keep it up.

Try it now :)

No shit right :D the one vid on there of the gxp at 654whp on 12psi :hump:

Not only do these dudes know their shit, but Kevin's one of the brightest guys i've met in a very long time. No atitude no bs and fantastic to work with. Im a fussy prick and very hard to please coming from the Porsche community but these guys impress me. I'm greatly enjoying every minute of it.

Cheers

I like it. K.I.S.S. Now get rid of that damn maf.

No shit right :D the one vid on there of the gxp at 654whp on 12psi :hump:

I've seen the Cartuning videos. I don't buy that 654 whp power claim for that boost level. Someone was aggressively playing with dyno settings to get it to read that.

Adding a turbo to the system actually lowers volumetric efficiency. There's no way that just 12 pounds of boost increased whp by 400 over stock NA levels. 400-450 whp I'd believe - and that power would be awesome.

I've seen the Cartuning videos. I don't buy that 654 whp power claim for that boost level. Someone was aggressively playing with dyno settings to get it to read that.

Adding a turbo to the system actually lowers volumetric efficiency. There's no way that just 12 pounds of boost increased whp by 400 over stock NA levels. 400-450 whp I'd believe - and that power would be awesome.

Car wasnt stock to start with. Cam, Rockers, Porting, LS1 TB, 3" down pipe.

Your right, it wasnt 12 psi. Was a whole lot more.

However for a bone stock 3.8L L36 running at 12 psi the numbers are 400 hp.

Check out the dyno graph of a bone stock Comp G with a kit.

http://www.cartuning.ca/products/product.php?model=grandprix&engine=l36

However the numbers are indeed correct.

plz show me where they got 654whp out of an ls4 on 12psi plz...

i think the accurate number there is 464 i do believe...now, ive seen 503whp i think it was out of the cartuning kit with some tuning done by Kevin on Jays car...the "first concept".... and maybe i didnt read it clearly...was that v6 car your speaking of?