jack27

Thanks guys for replaying
About the knock that i had
.9 or 1. I cant really remember
But that because i was running timimg up to 25
Something like that
And its not an issue

The other thing that the guy is looking at the dyno
Is
There was a stock car. Ls2 With stock short block
It had g6x3 and the same AFR head
For this car. The car dyno was 500
I havent tuned the 500 rwhp car
I havent even looked at the file
The owner used the car for few months then changed the car compo to supercharger



So the issue is
Same cars
Same heads
Same camshafts
One with piston and roads ( -2 or -3 )
Other is stock


My friend car is 460
The stock car is 500

This is what my friend trying to ask

r4104

the latest news my piston -3.2 my compresion is 11.18 & i have attached the latest dyno sheet & tell me what do you think

SMOKINV8

iTrader: (6)

You could pick up some good torque below 4300rpm if you add some fuel. It's pretty lean and you can see the power pick up when it starts getting enough fuel to run.

Your tuner's methodology on pulling the timing back is good. You might try finding out what octane gas you had during your tuning session, vs. what the other guy had in his.

If you had the exact same bolt-ons it would be surprising to see that much of a difference, but I haven't seen any comparisons of the bolt-ons. Everything has to work together, so if you've got a bottleneck in the exhaust or intake path it's going to hold your power back. Are you running stock exhaust manifolds?

r4104

I have vraram intake , 1/34 header kooks , c6 npp exhaust , fast 102
Both same fuel
After calculation i found that we both have same compresion
He have stock short block with AFR heads 62 CC

ducatisl

iTrader: (1)

Count me as another who used to run high timing (28*) but on the dyno tuning for nitrous recently, my tuner and I discovered that low timing (21.5*) was perfectly fine with no loss in power. Car is cam'd (224/236) LS3, stock heads.

LS2-wise, a friend i race with has a ported head/cam LS2 in a C6, and he lays down 505, but I believe that's on a Dynojet. I lay down 468 on a Mustang.

Maybe your intake/exhaust combination is not working as well as what's on the other car.

yelw 06 z51

The numbers are a little low. LSCHLEM on corvetteforum got 500+ hp ( I think around 460 tq) on stock ls2 block with ported fast 102 and a smaller 228 cam. He also had 59cc heads though not sure on the size of the head gaskets.

r4104

this car is driving me crazy. i think there is something wrong with it because it knocks at 23 timing ... what can cause knocks ? my plugs, wire's new fuel cycle is not high what it could be ?

djjonesivs

iTrader: (2)

Ls2
Etp 215
M6
19* -21 *timing 13.0:1 afr
6600rpm limiter
503 451
More in it at higher rpms

Had 24-26* before cam only
Dropped the timing made more power due to air flow efficiency
Probably 11-11.5 for scr