beardWS6

iTrader: (1)

I had my stock heads done and this is what I got out of mt stock heads from 2012 ZL1.

Intake Exhaust
.200 152 106
.300 234 158
.400 286. 202
.500 327. 220
.600 362. 241
.700 378. 244
.800 383. 248

What do you guys think of the heads now?

Car made 704rwhp and 694trq at the wheels with stock heads with this set-up.
1. Roto Fab Cold Air Kit
2. ZL1 Custom Heat Exchanger with dual fans
3. Metco Motorsports 9.1" lower pulley ( includes innovators west damper)
4. Metco Motorsports 2.5" blower pulley
5. Cam specs 227/242/520/590/122+6.
6. .675 lift double valve spring kit with Ti Retainers
7. Comp cam pushrods
8. 160 degree thermostat
9. solid isolater
10. Kooks 1 7/8" headers with Catted Connection pipe
11. Metco 50 MM Idler pulley
12. Blower belt
13. Ported mouth, ported blower, snout, throttle body
14. MSD wires and NGK TR7IX spark plugs
15. Alky Control Meth injection kit
16. ID 850 fuel Injectors

How much power will I gain doing the heads? Thanks!

redtan

iTrader: (5)

A good set of heads is usually worth between 30 and 50rwhp.

You should be able to clear that given that you pulley down after the heads are done to return back to your current boost level.