Pontiac G6 Forum banner

Predormance Mods to the GT 3.5L

15991 Views 27 Replies 9 Participants Last post by  nickya0721
So, I have the G6 GT with the 3.5l, and basically besides performance exhaust and CAI, there's nothing else to do to the 3.5l, preformance wise, that's relativley inexpensive to do? I wanna get some extra HP without like takin apart the engine and stuff like that. Im lookin for mods like, new fuel delivery systems, ignition system, turbo or supercharger, intake manifold stuff like that.

Also has any body heard of the JET performance moduel for the G6. If so, is there even a bennifit to geting it.
1 - 20 of 28 Posts
So, I have the G6 GT with the 3.5l, and basically besides performance exhaust and CAI, there's nothing else to do to the 3.5l, preformance wise, that's relativley inexpensive to do? I wanna get some extra HP without like takin apart the engine and stuff like that. Im lookin for mods like, new fuel delivery systems, ignition system, turbo or supercharger, intake manifold stuff like that.

Also has any body heard of the JET performance moduel for the G6. If so, is there even a bennifit to geting it.

CAI, Headers If you have an 05-06 model,The rest of the exhaust,good sparkplugs,Tune.

If you really want get into Port and polish the Cyinder Heads and Intake manifold.

Also
New fuel delivery systems $,$$$

ignition system Like MSD? not really need and also $,$$$

Turbo or supercharger You can but you will need to beefing up the trans,If you Did under 4lbs of boost you could proably get away with a shift kit, regular fuild chages and a Heavy duty cooler.... For awhile but it will take 3k to do right just for the trans. $$,$$$

intake manifold
you can get headers for the 05-06 model, not anything other than that
ok thanks i have the 2007 model.
3 more questions


do you know where i could get some prices for a fuel delivery system and intake manifold.

on the 07 i would have to pull the engine to do headers

and just out of curiosity do you know what kind of turbo or supercharger would work because some people say a turbo on a g6 is unsuccessful
ok thanks i have the 2007 model.
3 more questions


Do you know where i could get some prices for a fuel delivery system and intake manifold.

You would have to source everything out, IMHO LS1 injectors(if they fit) and a Boost a pump should quinch the thirst of any mod you can throw at it.

On the 07 i would have to pull the engine to do headers
No, lot of other stuff...

and just out of curiosity do you know what kind of turbo or supercharger would work because some people say a turbo on a g6 is unsuccessful
Would have to be all custom, Give STS an call it's the $$,$$$ you have to throw at it to work is the problem.
Don't worry, the vast majority of any mods you throw on the six will not only increase power, but also mileage so bigger injectors are not necessary.
Don't worry, the vast majority of any mods you throw on the six will not only increase power, but also mileage so bigger injectors are not necessary.
????
What the hell did I just say??? Dont pay attention to me today I am a little loopy. Must be from the exhaust fumes I inhaled from being in my garage working on the snowmachines....LOL
HOw much power out of high performance intake manifolds??? I found some and was wondering since they are only like 130 bucks...
where did you find the manifolds at? i have been looking but can only find gaskets and spacers
jcwhitney.com

It is an amazing site and they have EVERYTHING you could ever imagine and all you do it type in your year, make and model and they have everything you need that is gauranteed to fit your car.
http://wot-tech.com/ theyhave a cam and manifold
on the 07 i would have to pull the engine to do headers

and just out of curiosity do you know what kind of turbo or supercharger would work because some people say a turbo on a g6 is unsuccessful
you're worried about putting headers on, but you're confident about putting on a turbo?? i don't think you understand how much is involved with a turbo...

I'm not trying to burst your bubble here, but there is a LOT involved with a turbo and if you aren't very knowledgeable about engines/cars, then I'd suggest that you stay away from a turbo until you are knowledgeable about engines to the point where you can do it all yourself (except the dyno tune...cuz who has one just laying around?)

unless someone actually gets a turbo setup on a G6, then we're all going to assume that it "isn't worth the money"...which IMO isn't true, but I'm not about to dump that much money into my car because : 1. mine's automatic 2. i'll probably be buying a newer/different car within 5 years 3. i don't have anywhere near the money that it'll cost and 4. my G6 is my DD and it gets crappy city mileage to begin with
If you intall an sts turbo you can run a g6 on stock internal around 2-3 psi which might get you like 40 horsepower, and it will get you like 2 mpg better.
?????
That is what sts told me. Apparantly their turbo is way "smoother" so it is the easiest of any turbos anywhere on stock internals. Their turbo's do get the coldest air to the engine though, that is for sure.
That is what sts told me. Apparantly their turbo is way "smoother" so it is the easiest of any turbos anywhere on stock internals. Their turbo's do get the coldest air to the engine though, that is for sure.
they get the coldest air to the engine because its rear mounted and only 2-3psi...it better be colder than a header-mounted turbo.

and 2-3 psi would also be the reason why it's so "easy" on the internals...

IMO, if you're going to do a project like that, you should do it right the first time. if you get that 2 psi turbo installed, you're just going to want more power...which means you're going to get rid of it and upgrade to a bigger, header-mount turbo so you can spool faster and get the air to the engine faster.

like i said, if you don't know what you're getting into, then stay away
you're worried about putting headers on, but you're confident about putting on a turbo?? i don't think you understand how much is involved with a turbo...

I'm not trying to burst your bubble here, but there is a LOT involved with a turbo and if you aren't very knowledgeable about engines/cars, then I'd suggest that you stay away from a turbo until you are knowledgeable about engines to the point where you can do it all yourself (except the dyno tune...cuz who has one just laying around?)

unless someone actually gets a turbo setup on a G6, then we're all going to assume that it "isn't worth the money"...which IMO isn't true, but I'm not about to dump that much money into my car because : 1. mine's automatic 2. i'll probably be buying a newer/different car within 5 years 3. i don't have anywhere near the money that it'll cost and 4. my G6 is my DD and it gets crappy city mileage to begin with
yeah i know it takes alot of time, im just curious for like later on i didnt say i was goimng to buy one this second.
STS turbo's run at a lot more than 2-3 psi!!! H3LLO! They are like any turbo...depending on the size of it you can run one at 2-3 psi or as high as 12 psi. They make a bolt on application that is 9 psi strong...They can give a 210 hp v6 mustang 315 horsepower (at the wheels, so more than their GT version) with just 7 psi.
1 - 20 of 28 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top