Sittingmongoose

iTrader: (1)

https://ls1tech.com/forums/generatio...e-porting.html

Check that out. Fasterproms is now offering stage 2 porting. I am getting this done to mine. Should help to lessen the horrible intake we have. We are getting closer to having a modifiable car.

o and i already talked to Jeremy, he can do this for our intakes as well.

JDMC5

iTrader: (3)

the LS4 intake is stupid restrictive.....so is the cam and so is the exhaust.

Sittingmongoose

iTrader: (1)

well thats why this stage 2 intake would be great, that way people can get the benifit of having a new intake without having to retrofit a ls6 intake to fit

TheMonteMan

post pics when you get yours done.

CenTexSS

iTrader: (2)

That looks great. I might be doing this soon.

Sittingmongoose

iTrader: (1)

o i will, i have an appt for the 13th to get it done. expect my post that night o and thats going to include a before and after dyno too

CenTexSS

iTrader: (2)

Will you be getting the heads/cam done at the same time?

JDMC5

iTrader: (3)

Oh I agree, it should help. I think the area behind the TB is the big restriction though. One person had good success fitting an LS2 intake on his LS4. Never got any hard numbers but IIRC he said the SOTP improvement was big.

That intake is so restrictive I wouldn't be surprised it hear 20hp improvement just by switching to a stock LS6/LS2 intake.

Sittingmongoose

iTrader: (1)

I will be doing the heads and cam next week than a tune and the intake on the 13th.

He did have good sucess but it required a lot of money and modding. Also if you do the stock intake you cna keep the DOD

JDMC5

iTrader: (3)

DOD = GARBAGE. I still don't get how my vette could get 30mpg on the freeway but a smaller engine with DOD can't.

CenTexSS

iTrader: (2)

We can get 30mpg highway.........

neilownz

If we had more than 4 gears it might be even better.

Sittingmongoose

iTrader: (1)

i get well over 30, and neilz you had put different heads on right?

neilownz

Yeppers.

Compg

It's about 1000lbs lighter.

mike690003

iTrader: (2)

And the low drag coefficient helps too....

JDMC5

iTrader: (3)

so you're saying the grand prix weights 4200 lbs? hardly, try 400. Shouldn't make that big a difference.

JP_GXP

Mine has gotten 30 mpg, with DoD tuned out.

I'm sure weight to power ratio and more gears helps a little too.

Striker

iTrader: (1)

So you guys can't swap over to an LS6 intake, or any other intake for that matter?

Also is the exhaust that restrictive??

neilownz

LS4 powered cars are the stepchild of GM. Either the oil pressure sender or the power steering stuff is in the way. The rear manifold is terrible.