The 04+ GTPs and GXPs benefit big time from a PCM upgrade. Because of the use of the 4T65E-HD the programming is putting in some serious torque management to preserve the life of the tranny.

Ya I know the L67 has lots of potential we all do. The fact is somepeople want to be different.

When I had my 63 Nova I was going to hot rod the 250 straight six it had in it. Only because all the others were your standard 350/350. If the block wouldn't have been toast I woulda built it. But the block wasn't worth saving.

It's all well and good to be different; I'm an advocate for such, but it's only fair to let someone know when the way they want to go will be somewhat difficult and costly.

I think it would interesting to see a GXP engine in a 97-03. Someone else can work through the PITA process though, and most of us could still give it a run for it's money.

I almost did it, but backed off on account of the down time it'd have caused me along with the incompatibilities that would have had to be dealt with between the pcm and bcm...

I still think it'd have been one cool little drop in had I had the resources to do it... =D

i agree the L67 is def the best choice, i just like to see what u guys think. the N* is crap, my mom's had a few in her cadillac's. whenever my pop and i lined up, i'd blow the doors off it, but top end that motor will put up good a fight. they enhale gas though and i mean destroy.

I would love to do an LS1 with an M90 on it. i'm planing it out when this motor (if ever) shits out on me.

as of right now i have no reason to touch my GTX it beats most V8's with mods.

Whew, good luck. You'll have to get custom everything, and a lot of mods to handle the boost since LS1's are very high compression (for some reason I'm thinking they are 12:1). It'd be better to just buy a Procharger kit which is premade with all the components for it.

ive seen it done and oh boy it's sick nasty, only if u slap in intercooler to it.

there is a guy in florida that has a S/C LS1, he was at our local mod day. I didnt get to look at it, but i didnt even think it could be an M90 blower

yeah... V8's like centrifugal blowers. they're easier to adapt (mount the unit, get a belt around it somehow, and run steel tubing to the intake) than doing the entire upper intake custom. i've seen a roots type supercharger on a GTO that seemed pretty crazy (and expensive).

This will mate upto the LS1



power increases of 123 hp and 124 ft-lbs of torque for the LS2 and 110 hp and 120 ft-lbs of torque for the LS1.

price

$6,599.00

For that you could get a built tranny and a turbo setup for your 3800