jason5

iTrader: (2)

2000 camaro ss 6 speed, how does my a/f look
ls1 bored .10 349 cubic inches
222/224 566/568 112 comp cams
patroit ls6 stage 2 heads 10:5:1 compression
hooker long tubes
ls6 intake
ported tb
ls6 maf
slp air lid
bellow
3 inch y-pipe

gomer

iTrader: (13)

You could use some fuel curve tuning.. it is kinda rich at the end. Were you running thru a full exhaust or did you have a cutout? I would have expected over 400rwhp with that setup.

jason5

iTrader: (2)

hooker long tubes with 3 inch y -pipe, through slp lm exhaust, no cats

WS6FirebirdTA00

iTrader: (33)

i would have expected to see about 410 or so myslef

TVWilkes

Your A/F needs some tuning.It seems a little low.How new is the short block?

jason5

iTrader: (2)

the car had 50,000 miles on it and i pulled and bored it .10 to get rid of the piston slap and it did, and put cam, heads, comp r lifters, yella terra rockers, comp pushrods, ported ls6 oil pump, headers and ls6 intake on it, the motor has 400 miles on it today when i had it dyno

gomer

iTrader: (13)

The comp R lifters may be your problem. Did you triple check the hot preload on them? Too much preload on the comp R's (which require much less than stock) is a very bad thing.

Btw, I ran a set of the TSP raceport LS6 styles a while back with a 221/221 .558/.558 114lsa and made 424rwhp 398rwtq thru a 10 bolt.

jason5

iTrader: (2)

incorrect preload can lose that much hp

gomer

iTrader: (13)

Yes, too much preload can hang the valves open and loose cylinder pressure.. which will cause a big loss in power. If you didn't mill the heads, used 7.4 pushrods, and yella terras without a shim on Comp R lifters, you have too much preload and that is really hurting you.

jason5

iTrader: (2)

dang i didn't know they were different from stock, i set the preload at .035 with yella terra rockers and 7.450 pushrods, because i thought that what stock was suppose to be around. well this sucks, i guess i'm gonna have to buy some adjustable rockers now, does any one know what the preload need to be with these lifers

gomer

iTrader: (13)

Wow, if you are running 7.450's and no shims you have WAY too much preload. I'd either run no shims and 7.350's or shims with 7.40's. Comp R preload is right around .010 or so HOT, not cold... it is better to have a touch to little preload and some valvetrain noise than to have too much. Adjustable rockers are some serious $$$, you cheapest route would be to shim the rockers or buy shorter pushrods.

jason5

iTrader: (2)

well first i had 7.350 pushrods with no shims and the car sounded like a loud sewing machine and the cam wasn't loping so i knew something was wrong, pulled the valve covers off, and there was so much clearence between the pushrod and rocker, you could shake the rocker, i measure the clearence between the rocker and valve spring but i forgot what it was, so i put 7.450 pushrods in and it quieten it down and the cam started loping then figure it fixed the problem, so what route should i go now

TVWilkes

You will only have a 1/4 of a turn preload on the Comp R lifters.I would go back to the stock type lifter.The incorrect preload will rob tons of power.

SStolen

iTrader: (22)

Yep, go back to stock. Perfectly fine for your set-up.

c5blkvette

I have very similar mods and got 401rwhp and 384rwtq