I have a '00 T/A M6. My current mods are a MTI lid,Borla catback,KB DD SFC's,hotchkis LCA's and torque arm,eradispeed rotors,SLP line lock,nitto Dr's and a spec st. 3 clutch.
I was considering a 150hp TNT kit but since that would be used mainly at the track I want to improve my daily driving performance (to keep the pesky imports at bay) so i thought of this combo. keep in mind I have to stay 50 state emmisions legal.

LS6 intake,
FTRA,
ceramic coated edelbrock shorty headers (keeping 50 state legal sux!)
zo6 MAF
Slp ported and polished TB
smooth bellows
predator power programmer

I figure I should gain somewere between 20-30hp. I'm hoping this combo is good for mid 12's at around 110-111mph or so. Do these numbers seem about right to you guy's. I would like to match the performance of the mustang I used to have as my daily driver.It ran 12.5@112 with heavily ported windsor sr. heads and Gt40 intake ,long tubes and no emmisions whatsoever.I would like to match that with a 50 state legal bolt on LS1.
any help will be appreciated

 

Shortys are pretty much useless on a LS1...stock manifolds probably flow just as good..I have the same problem here in NJ, we can only run shortys..legally anyway....everything else looks pretty good for about 20 hp, maybe a bit more.

 

the corvette exhuast manifold are good cheap up grade. (a used set) ina magizine i read they showed a 9 hp gain over stock f-body manifolds.

 

IMO, I'd say you can do a cam swap and you'd still be emissions legal...just don't go too big. That would get you the most power without crossing the line on emissions requirements. Something like the LS6 cam is a good upgrade...cheap, and pretty much guaranteed to pass emissions since they already do in the Z06. Also, if you switch to the LS6 manifold, they don't have provision for an EGR valve, so you'll be deleting that in the process. I'm sure that switching to shorty headers won't hurt performance, but I don't really know that they're worth the effort? For your M6, I'd also recommend running 4.10's / 4.11's.....they won't kill your highway mileage like they do in the A4, but they'll greatly improve your acceleration.

 

Thanks for the responses.

I was planning on running the SLP LS6 intake for the '98-00 models with the egr.
I plan on doing a head/cam package next year. I figured that if I stay with a ported 5.7LS1 head I can keep the comp. the same and with a mild cam it could pass emmisions.I don't beleive LS6 heads are 50 state emmisions legal on F bodies?If they are I'll get them. I always wanted a LS6 T/A.
I would like to go with 4.11's but I read on here that alot of people end up breaking rearend parts after installing 4.11's on a stock 10 bolt. I think I'll wait untill i have the cash for a 12 bolt before I go for a gear change.
If I only had more money!!!!
_____________
my T/A- http://www.cardomain.com/member_page...page_id=764642

my mustang- http://www.cardomain.com/member_page...page_id=762099

 

Why wouldnt ls6 heads be 50 state legal, they come on a production....More often then not its the cam you need to worry about being legal rather then the heads

 

Exactly. That was my reasoning for recommending the LS6 cam.....if the LS6 heads/cam are factory production pieces, they should be 50 state legal. You can also look at the GM Hotcam kit, which some guys say doesn't peak as high as the LS6, but gives you a little better low end, and is still emissions friendly AFAIK?

In terms of 4.10's breaking more than stock 3.42's, I'd say that's probably due to the fact that most guys who put in 4.10's aren't putting them in to drive slow, it's 'cause they're intending to drive fast, as much as possible! Don't think that 3.42's don't break either.....try driving the car hard on the 3.42's all the time, and launching at the track with slicks.....I'm sure you could break something no matter what ratio is in there!?

 

SSRA > FTRA
smooth bellows is visual mods at best
ZO6 maf will probably cause problems in the tuning
and the TB is minimal gains

but the SLP LS6 intake with EGR is a good idea, as is the LS6 cam

 

I looked into getting the LS6 conversion kit.They sell it at pace performance. In they're catalog it reads that It's only emmisions legal on '01- up vettes?They're online catalog says its a off road conversion only and it may not pass emmsions testing.I think possibly that LS6 heads increase compression and then sends out more pollutants.
or is that only because of the cam? Maybe I'll call them today after I get home from work to find out whats the deal. I'll let you know.

 

i think it's more a matter of changing the original equipment. it's kindda like a blanket law to cover most mods.

the heads are probably "passable" if the tech doesn't notice them. kindda like the cam will pass as long as the emissions are low.

considering i've heard cams as big as the TR224 pass cali emissions...i'm sure the LS6 would.

 

Like the LT4 Cov. kit years ago same goes for the LS1...aftermarket heads and cam will yield you way more power and probably cost considerbly less...Your lookin at around 350ish rwhp w/ that LS6 kit

 

thanks for the advice guy's. I probaly wont bother with the TB anf MAF sensor now. I am thinking about springing for the head/ cam package with my income tax refund.
I emailed Pace about the LS6 heads and they wrote this:

"The heads should have little or no effect on emissions in this swap. The big variable with emissions is the camshaft. if you use the stock LS6 cam and have the PCM programmed accordingly (with CA emissions compatibility in mind) there should not be any problem. We cant say that anything like this is emissions legal especially in California, because it does not have an EO# or CARB certification. But if you do the swap as I mentioned, the emissions should be the same as an LS6 Corvette"

Which head /cam combo that will pass emmisions thats halfway affordable?
Patriot seems to have good prices. How do their head perform?
take it easy guys.

 

tr (thunderracing)224 cam should pass the sniffer w/ a tune and it will give you more power then the LS6

 

I've decided on head and cam. Can it be done with engine in car? If I have to remove engine, is it easier to remove from top or from droping front suspension? I'll be ordering everything in about a month.
thanks,
mike