Come in help with build-
Thread Starter
Teching In
Joined: Mar 2015
Posts: 11
Likes: 0
From: South Florida
Come in help with build- Hello,
Current setup is as follows. 2002 Z28 A4, w/ ac/ps
Engine: 347 LS1
5.3L heads W/oversized valves (#706 heads)
Comp LSR cam 231/239 .617/.624 113 LSA w/ New pushrods / Valve springs
Wiseco Pistons
K1 Rods
LS6 Intake manifold
LS7 lifters
Ls2 Timing chain
FAST 36# injectors
Aero 340 LPH fuel pump
Car made 378/380 on motor and 494/433 on a 150 shot with a bigger fuel jet then recommended.
The car seems to lack some power on motor at the top of 3rd.
Id like to try and fix this with a more aggressive cam.
Do i need a special cut cam to work with these heads/valve setup? What cam may you recommend? I'd like it to be pretty aggressive on motor with the nitrous as just the extra giddy up when needed. This is not a daily fyi.
Sorry for maybe the ridiculous question but i didn't build this car my uncle did and i inherited it as a wedding gift.
Thanks,
Current setup is as follows. 2002 Z28 A4, w/ ac/ps
Engine: 347 LS1
5.3L heads W/oversized valves (#706 heads)
Comp LSR cam 231/239 .617/.624 113 LSA w/ New pushrods / Valve springs
Wiseco Pistons
K1 Rods
LS6 Intake manifold
LS7 lifters
Ls2 Timing chain
FAST 36# injectors
Aero 340 LPH fuel pump
Car made 378/380 on motor and 494/433 on a 150 shot with a bigger fuel jet then recommended.
The car seems to lack some power on motor at the top of 3rd.
Id like to try and fix this with a more aggressive cam.
Do i need a special cut cam to work with these heads/valve setup? What cam may you recommend? I'd like it to be pretty aggressive on motor with the nitrous as just the extra giddy up when needed. This is not a daily fyi.
Sorry for maybe the ridiculous question but i didn't build this car my uncle did and i inherited it as a wedding gift.
Thanks,
That is a pretty aggressive cam for a 5.7, perhaps the valve springs are just shot and it's considerably more noticeable in the third gear when the engine is building rpms at a slower pace.
A set of MMS220 heads and a matching 92mm FAST intake should put you in the mid fours at the tire on *****
A set of MMS220 heads and a matching 92mm FAST intake should put you in the mid fours at the tire on *****
TECH Fanatic
Joined: Aug 2009
Posts: 1,845
Likes: 255
From: Coast of San Mateo County Between Pacifica & HMB
I agree with A. R. Shale Targa, MMS 220 heads, 227*/231* cam, +FAST 92=
420+ RWHP With stalled auto, better performance bottom to top,
along with Better Driveability as well.
420+ RWHP With stalled auto, better performance bottom to top,
along with Better Driveability as well.
