Fbody01s6

What are some smog legal numbers you guys have gotten in Ca.

if so what mods are the best to get more hp and still pass the emissions test

93camaro_zzz

iTrader: (13)

Check out the Procharger P1SC setup. It is 50 state legal.

djsanchez2

iTrader: (14)

Forged bottom end, Heads, blower cam (smog legal design), Procharger. That will net the greatest amount of power for a smog legal set-up. I wouldn't expect much more than 600whp though through a restrictive stock exhaust.

93camaro_zzz

iTrader: (13)

^ Exhaust cut-outs a quasi-legal. lol

djsanchez2

iTrader: (14)

Still restricted by the stock manifolds and cat.

Susuki2012

nicer than u need.

Fbody01s6

Thanks for the reply i think a blower would feel better with the m6 and i have an a4 i think I'll go with heads and cam first maybe a stall since i do plan on getting another f body with an m6 i taught heads and cam where not smog legal

djsanchez2

iTrader: (14)

A4 would be perfect with a Turbo. Sadly the only Smog legal turbo kit around for Cali would be STS kit.

Heads are legal, cam just has to be a certain size. There is info in here if you search around specifically in this section.

Fbody01s6

Thanks For the Info I'll look into The Smog legal cam size specs

Jeremy 92 RS

iTrader: (9)

Surprisingly not a lot of people go the route you're seeking. What djsanchez said would be a maxed out setup, a cheaper route would be some bad *** heads and a small enough cam that a good tuner can get to pass the sniffer. Probably not much bigger than 224/224. And all of the little **** you can add like pulley, a nice air intake like K&N FIPK, and throttle body will help pile the HP on. Will be more than enough power to smoke 9/10 cars on the road. Or 10 out of 10 depending on where you live lol. And since you're an auto, even better. A nice torque converter will feel like you added 50+ hp on the butt dyno.

slogoat

I'm running a p-1sc through stock manifolds and put down 501. To get more power out of the smog legal kit, you need to go with bigger injectors, higher flowing fuel pump, and I'm running a 10psi pulley.

Fbody01s6

so with the p-1sc on stock manifolds and stock internals i would get some where around 80-90 hp gain? since im guessing the gto is somewhere around 400 allready bone stock

Fbody01s6

haha well i allready have an underdrive crank pulley and a slp lid ad k & n filter and was allready thinking about getting a nice torque converter but i did not know that aftermrkt heads and a cam were smog legal and as i learned apprently they are, so i will get some asap with some resarch on the set up (best heads,cam set up,best intake etc.)

djsanchez2

iTrader: (14)

LS1 GTO will put down ~300-315whp
LS2 GTO will put down ~330-345whp

slogoat

I put down 355/355 with an intake, catback and tune. So yeah Mr Sanchez's numbers are spot on. With about 6 psi you should get at least 100 hp. I'm getting a little more due to the different pulley and more fuel. Either way it does suck trying to stay legal. If you are doing N/A just remember the choke point is the stock manifolds and cats so don't expect some of the big N/A gains that you read about because a lot of those guys are running long tubes.

Fbody01s6

Thats what im worried about with the stock manifolds that if i go the N/a route i wont get the flow needed to back up the cam nd heads i have taught about carb eq legal shorty headers but the gains are garbage for the price compared to a pair of decent LTH's

djsanchez2

iTrader: (14)

^^^ There are not really any gains with shorties. I used them on my last car just for the sound. LOL

jeffro_93

iTrader: (16)

I can see 400 being a reasonable goal while staying smog legal and naturally aspirated.
I'm pretty sure 228/228 cam is the absolute biggest you can go and still pass smog.
You can have a shop port and polish some 243's and put you up there as well.
From my experience, too big of a cam, and altering the exhaust is the biggest way of failing smog. You can do a forged bottom end, a 228 cam, ported and polished heads, intake and throttle body and make decent power. If you dont mind swapping exhaust every 2 years you could do long tubes with gutted or regular cats.
Then theres always the P1, which is smog legal or even a nitrous shot which is easy enough to uninstall every 2 years.
Before doing any of this, i would do a 3600 stall, that will make your car feel like a totally different car instantly. I picked up half a second on a bolt on/free modded 98 camaro with a pi 3200.

NnOoSsSs

iTrader: (1)

Whats a nice TB thats pretty popular with you guys.

jeffro_93

iTrader: (16)

There are a few guys out there that can port and polish your stock one. Pick up a few extra rearwheel, and still look totally stock.