Mkuhn138
1/2 ton status
This is a cheater Cam reground on a zz4 core originally by GM performance. The stock specs are as follows:
Intake Duration at 050 inch Lift:208
Exhaust Duration at 050 inch Lift:221
Duration at 050 inch Lift:208 int./221 exh.
Advertised Intake Duration:275
Advertised Exhaust Duration:280
Advertised Duration:275 int./280 exh.
Intake Valve Lift with Factory (1.5:1) Rocker Arm Ratio:0.474 in.
Exhaust Valve Lift with Factory (1.5:1) Rocker Arm Ratio:0.510 in.
Valve Lift with Factory Rocker Arm Ratio:0.474 int./0.510 exh.
Lobe Separation (degrees):112
This cam is reground by brezenski http://www.castheads.com/crate_heads.php who is well known in the circle track world for disguised/under cover/cheater parts. The lobe separation and duration are changed slightly, but valve lift is not changed at all - they do not give out the exact specifics for obvious reasons. In a ZZ4 or 604 engine these changes are worth about 15hp, and idle and low end manners aren't noticeably affected. I will also include the matching valve springs, retainers, and locks - these are also brezinski parts. These are very expensive parts, but obviously not worth the extra cost to any of us since we aren't competing or trying to hide anything. This would be a great setup to use in combination with a set of vortec heads. Looking to get $200 - lifters aren't included.
Intake Duration at 050 inch Lift:208
Exhaust Duration at 050 inch Lift:221
Duration at 050 inch Lift:208 int./221 exh.
Advertised Intake Duration:275
Advertised Exhaust Duration:280
Advertised Duration:275 int./280 exh.
Intake Valve Lift with Factory (1.5:1) Rocker Arm Ratio:0.474 in.
Exhaust Valve Lift with Factory (1.5:1) Rocker Arm Ratio:0.510 in.
Valve Lift with Factory Rocker Arm Ratio:0.474 int./0.510 exh.
Lobe Separation (degrees):112
This cam is reground by brezenski http://www.castheads.com/crate_heads.php who is well known in the circle track world for disguised/under cover/cheater parts. The lobe separation and duration are changed slightly, but valve lift is not changed at all - they do not give out the exact specifics for obvious reasons. In a ZZ4 or 604 engine these changes are worth about 15hp, and idle and low end manners aren't noticeably affected. I will also include the matching valve springs, retainers, and locks - these are also brezinski parts. These are very expensive parts, but obviously not worth the extra cost to any of us since we aren't competing or trying to hide anything. This would be a great setup to use in combination with a set of vortec heads. Looking to get $200 - lifters aren't included.
