Thread: LS 4 conversion 99gt??

So im planning on going up under the hood of my car adding performance. I know its alot of options but im still not sure. I was thinkin about getting a newer l36 motor an adding a turbo, then i was thinkin about getting the full L67 motor and tranny swap and adding some performance parts along as well. But I just recently heard that a shop near me could do a LS4 conversion in 97 to 2003 grand prixs!! Has anyone done or know of some1 who has this conversion already put in a early model Grand Prix?? If so can u help with me with some advice or let me know if its even worth all the money im going to put in the project? Personally im a all motor kind of guy i was wanting alot of horse power but i know adding boost is a faster way to make your car have more power; any HELP would be much appreciated

first off, you need to know how to work on a car before you can even think of doing any of this. that being said, go buy some tools.

second, anyone that WANTS to mod an LS4 is clearly an idiot. there is no aftermarket support and the motor doesnt have any nuts to begin with.

More **** talk i said HELP u dumb ass**s not trash talk an im pretty sure i know more about cars than u quik GT maybe u meant u know more about gp's than me but cars in general highly doubt that 1 an the idiot comment what did that have anything to do with a LS4 conversion so i guess quik GT is an idiot to because he said he was thinkin about doing it as well or maybe you trying to say anyone with ls4 gxps, and ss's are idiots for buying theyre LS4 powered cars and adding mods to them.(by the way look on youtube ive seen ls4 cars makin mid to high 11 passes on therye)

i didnt see one....wait, found one period in that entire ramble you just spit out.

i was telling you that an LS4 conversion is completely retarded, so even debating it is moronic. if you want to make your car fast then maybe you can ask the right questions first. until then, have fun learning by yourself **** knob.

figure out how to get an LS1 into it

Originally Posted by tylerbinski

figure out how to get an LS1 into it

LOL hell yeah man anythings possible with cars nowadays

Originally Posted by BoostedComp

then you wonder why people knock on you... your a tool... quickgt tried helping you by telling you the drawbacks of adding an ls4 to a 97-03 grandprix he went on to HELP you and tell you there isnt much after maket for those engines... he didnt say they arent good engines.. he said after you have it in, there isnt much more you can do... and judging by all the questions your asking and the fact that you cant seem to do much under the hood work on your own... i doubt you know more about the mechanical aspect of cars than he does...

Reread his last sentence was it really called for any whatsoever?

It's uncalled for? He was giving you advice, you need to learn more about what's right/wrong for these cars before you just jump into them. Judging by SO many of your previous posts you don't know a whole lot about how to make a car faster. You said that you beat a GTX WITH A MALFUNCTIONING CPS, that can hurt his performance a lot. Please get over yourself.

For the LS4 swap do some searching about the motor. There isn't much of an aftermarket for them, it's much smaller than the 3800 aftermarket which is already small enough. Keep your motor and look into an L67 swap, top swap, or turbo. You will go much faster without the headache of swapping in a completely different motor.

If you want a lot of power, turbo it. If you want to stay non-boosted, start looking at a stroker kit and a set of heads with a nice big cam.

Originally Posted by DanGTP

If you want a lot of power, turbo it. If you want to stay non-boosted, start looking at a stroker kit and a set of heads with a nice big cam.

Around how much wheelhorse power do u think i could get with just those mods alone? Say if i was to get a stage 3 cam on the cam part?

Originally Posted by Sandman

It's uncalled for? He was giving you advice, you need to learn more about what's right/wrong for these cars before you just jump into them. Judging by SO many of your previous posts you don't know a whole lot about how to make a car faster. You said that you beat a GTX WITH A MALFUNCTIONING CPS, that can hurt his performance a lot. Please get over yourself.

For the LS4 swap do some searching about the motor. There isn't much of an aftermarket for them, it's much smaller than the 3800 aftermarket which is already small enough. Keep your motor and look into an L67 swap, top swap, or turbo. You will go much faster without the headache of swapping in a completely different motor.

Has anyone ever heard the old sayin ''if u dont have anything positive to say then dont say it all'' ppl on here should follow that old sayin.

Originally Posted by gtryda

Has anyone ever heard the old sayin ''if u dont have anything positive to say then dont say it all'' ppl on here should follow that old sayin.

haha, maybe you should follow your own advice

even with a fully done up n/a motor you will be hard pressed to run 12s even with all the traction the world can give you. boost is the only answer this motor takes.

An LS4 swap while differnt is probably not the best or most cost efficient way to go.. and as most have said the aftermarket isnt that great

A top swap or turbo on the engine you have now is the way to get the best gains for the amount spent. Look in the for sale section almost any time and you can find most of what you would need to make your ride faster

Yea i was kinda thinkin in order to have any chance of hittin 12's i would have to have some kind of boost thats y i thought the LS4 would have a better chance than a L36 at crackin the high 12's on a all motor car but your right not really alot of performance parts available for LS4''s i wonder y Gm would put them in 3 or 4 of their cars an not make that much performance parts for them. The LS1's an LS3's have alot of aftermarket parts but not the ls4's??

supply and demand the demand for aftermarket parts is greater for ls1'2'3s performance companys go where the money is