NaturalMystic831

I was thinking the same thing. So the TR224 seems to be the consensus. You guys are extremely helpful.

aprilia1

Did you notice all those that responded DON'T live in Kalifornia? Your HC emissions are far tighter in this state than others and going beyond an LSA less than 114 and duration greater than 220 is risking failure. Our state sucks as far as performance modifications so keep it conservative to eliminate a need to always find a friendly smog test site.

Just upgraded a 1999 C5 with a Vinci 079 cam and LS6 ported heads which will not "offend" the smog goons. It is a very strong torque cam and will pass easily with a 210/218 duration and a 116 LSA and not needing a tune per the experienced installer. In fact, he stated this is the best performing cam he has installed to date. You can also look to a Lingenfelter GT2-3 which is capable of passing with a modest tune or nothing at all I am told. Why risk emissions failure when you can have incredible street performance gains with a reasonable cam. This cam and head combo is very strong in real world use. Be cautious my friend unless you always want to search out a "friendly" smog tester.

A1

PREDATOR-Z

Ha, Ha stock Z06 pulling 400rwhp stock on dyno, I would like to see this freak.

405 bhp with 12% driveline loss (and I'm being conservative) translates to ~352 rwhp
That is about where they should dyno if that. (stock)

plaf713

iTrader: (8)

there is no accomplishment in passing ny emissions, as long as you arent throwinng codes you can pretty much get away with anything and there is no sniffer, not sure how this is helping a guy in cali

Ryan L

If you read my post again, I said stock LS6 longblock (which is the engine). Intake, long tubes, and tune reach anywhere between 390-400rwhp on the Z06s. It doesn't make sense that a TR224 would gain as little as 0 HP on top of that.

http://forums.corvetteforum.com/show....php?t=1672810

PREDATOR-Z

Read your post again, you don't have a Z06

But hey you'll find out when you dyno won't you? and the more the better.

Ryan L

I think you mean the thread starter, which is not me. But yes, I have a 390rwhp Z06 with only an air filter and headers. I have also thought about the TR224 and would hope for nothing less than 415-420 rwhp.

I hope.

PREDATOR-Z

I'm not arguing with that, but you are not stock, you are bolt ons. and yes you should pick at least a good 25/30rwhp tuned

I was talking about the Goat.

NaturalMystic831

Aprilia, I took into consideration that some of the guys weren't from Cali, and I figured the TR224 would be borderline so I was considering the TR220 as well. Thanks for the info anyhoot.

Prey-dator, I know I don't have a Z06, but it's basicly the same block as the real thing without some small upgrades (windows in the block between both banks, etc.) and if I remember correctly, the C5 is a 5.7L. Instead of being condescending and snotty, you should try to educate us noobs. Funny how some people think they can talk down to others because of the massive amounts of posts they have. Dubai must have some long, cold, lonely nights.

PREDATOR-Z

I did not talk you down, merely stating the reality of things as per my experience. Sorry you feel that way, and my apologies if you do.
A Goat because of the drivetrain configuration VS a Z06 will not dyno the same even if they have identical motors with exactly same bench dyno output.

Anycase, I always try to help, again sorry if you read it the wrong way.

NaturalMystic831

Hey, no problem. I know things can sound different when they are read versus being heard. All I was getting at is if a 5.7L Z06 can put out close to 400 hp at the flywheel with a good tune and some bolt ons then it's not such a far-fetched idea to expect the same out of a GTO LS1 (which happens to come with the LS6 intake) + '04 Z06 heads + bolt ons + a mild aftermarket cam. By the way, I'm kinda leaning towards the TR220 at 114 LSA. I didn't install the yella terras for hp as much as for durability and valvetrain geometry consistency but will the reduction in friction free up any horses?

BAD2000TA

iTrader: (6)

FYI - Predator-Z has a high number of posts because he's been here for awhile and is ALWAYS willing to help out people with questions. He is very knowledgeable about what works, what doesn't, and why certain combos don't work as expected. Try to be aware that you are new and there are many people that have years of experience with these motors. Just try to be nice.

NaturalMystic831

I've always enjoyed learning, that's why I'm in my last year of an electrical apprenticeship and that's why I'm here but that ^^^^ doesn't read too well

PREDATOR-Z

Like you said sometimes things don't read what we mean. No harm done. You are on the right path.
For Cali, try to keep your choice of cams in the -6* overlap to be totaly safe.
Many -2* (TR224) have passed but it depends where tested and on which day in time.
i'm here to help if I can.

NaturalMystic831

Thanks for the info. I'm used to seeing cams rated in LSA. What would a -6* equate to? Is there a formula to convert or are they independent of one another? I was also condsidering the TR220 at 114 LSA. The first test when I take it to the state referee to get it certified is the only one I'm really worried about. On subsequent tests I can take it to my buddy's dad, he runs a smog station. Oh yeah, one thing I've been wondering for a while, will having the Z06 heads w/yellow springs, yella terra rockers, and slp pushrods allow me to use a higher redline (than stock GTO) or does it also depend on the bottom end?

NaturalMystic831

t.t.t.

silverLSWON

iTrader: (16)

x2 or the comp 224 230 cam.

NaturalMystic831

Do you know if the TR224 or TR220 have the same base circle as the stock cam?

PREDATOR-Z

They are both smaller

NaturalMystic831

Would it be necessary to buy longer pushrods if I go with either one of these cams?