1999Firehawkls7

iTrader: (3)

My C5 Zo6 has a Ls2 short block w........

-Vengeance Racing VRX5 Custom Grind (236/238 .601/.605 113 LSA)
-Stock 243s
-Ls6 Intake
-Kooks Long Tubes
-Kooks Off Rd X-Pipe (No Cats)
-Stock Rockers w Truion Upgrade
-T56 Car

Dyno Tuned out @ 421WHP 400WTQ......(Dyno Jet)

Now w a set of TEA stage 2 243's whats the HP gain ya think Im looking at w them CNC Porting my heads and bumping the CR up to the most I can w Pump Gas?

Also would I be leaving Power on the table keeping my Cam or swap it out at the same time as well?

HCI2000SS

iTrader: (2)

Maybe anothe 40 hp or so

HioSSilver

iTrader: (8)

Seems low to me.

1999Firehawkls7

iTrader: (3)

The power the car makes now? or gaining another 40hp from the cnc head?

MikeWS6

Those are on the low side. Basically what my h/c ls1 made on a dyno jet. If the car runs good, no biggie. Dyno numbers really dont mean anything at all.

HioSSilver

iTrader: (8)

The power it makes now. There is no guarantee you'll pick up 40 with heads either. You should really be in the 440 range I think. Maybe it will take messaging some of your parts.....maybe it will take changing a few parts.

1999Firehawkls7

iTrader: (3)

Well one thing about the set up is the Ls2 knocks w my Ls1 pcm dont give us a reading so there could be some timing left to be added but w out a darn KR reading while tuning we left it safe.....

While the heads come off or before I plan on making sure the Knock sensors are reading correctly so when we re tune the car for the heads I can lean on it for sure w out having a issue of Spark Knock

HCI2000SS

iTrader: (2)

Not that dynos really matter, but for reference my buddy made around 420 rwhp on his cammed 06 GTO with a stock LS2 intake with full exhaust, 6-speed and tune, so this seems about average to me. It was on a Dynojet dyno as well

1999Firehawkls7

iTrader: (3)

Thinking w a .040 Head Gasket at 63cc Cambers and if the pistons come out of the block by .010 (Which I will Measure once the Heads come off) I will be at 11.78:1 CR

Kinda of worried about the .030 Quench is that to tight? on a stock bottom end Ls2?

Gabbiani

iTrader: (20)

I think the power is about right. Cam is not gigantic - it is still 243s and an ls6 intake. Fast would get you 5-10. Good heads would get 30-40.

I've done tons of c5 z06 cam only cars in the 410-430 range depending on cam size.

The extra .3 liters isn't that big of a difference.

HioSSilver

iTrader: (8)

So I guess my crate ls6 is in ls6 cam only territory. Don't sound right to me......I guess these guys need to finish off there bolt-ons and dot their I's and cross their T's.

Gabbiani

iTrader: (20)

Your numbers on a dyno dynamics don't mean anything in comparison to his on a dynojet.
I know nothing about your car but it isn't trapping 131 with a stock ls6 and full weight.

HioSSilver

iTrader: (8)

Sure they do. The dyno dynamics are about 3.5% lower(I've been on both). That puts me at 431whp/408wtq. I'm about 400lb lighter than stock.

1989GTA

I agree. Maybe somewhere in the 440 range.

thunderstruck507

iTrader: (18)

420rwhp for a mid size cam and stock 243 heads isn't that low...I would call it pretty damn average

HioSSilver

iTrader: (8)

I would agree if it was a cam only ls1. But a ls2 with ls6 heads and a decent size cam should do better. Unless average is your goal.

Like I said op.....go over your parts...message them where needed and maybe change a few and tune it again. I think there is some left in it.

1999Firehawkls7

iTrader: (3)

Did ya not see my post about my Knock sensors not reading?

Go back up to Post #7

Cwarta

iTrader: (12)

Just as an insite, buddy had a 05 gto, pacesetter headers, catless with borla catback, and a vararam. Put down 434/418 on E85. Untouched everything internally sans cam. Car runs like it to. I put down 454/425 on the same day in my LS2 and on a perfectly even hit I was a slow but steady pull away.

His graph for reference.

1999Firehawkls7

iTrader: (3)

Alright ppl.....the point of this Post was not to bash my Whp..........fact of the matter is it's a light weight Zo6 that as it sits pulls away from a 475whp F-Body w my "little" 420whp

All I wanted to see was the Gains I was looking to make, thats all

Cwarta

iTrader: (12)

I hope you didn't take my post as bashing, That was strictly for comparison sake.