Quote: OK guys. Made a couple pulls tonight and its not even in the ballpark. timing was at 36 and jets were 78 w/pv and 86. Jetted up 2 sizes and lost power. Tried 34 degrees and lost power. Peak hp was at 5700 rpm - 560hp, peak tq at 4900rpm - 559lbft. Checked cranking compression and all cylinders were right at about 160. Loosened lash .005 on cyl 1 as a test and pressure went up to 175. Valve lash was checked and none were out of line. What do you think the problem could be? My engine builder thinks the cam is wrong and the intake is not great. How much could port matching the intake be worth (if it was off by a lot)? Why would it not pull past 5700??
Here are the cam specs:
262/268 @ .050 lobe lift .390/.400 lsa- 112 recommended installed at 108, and is installed at 109 .585/.600 lift
Engine guys, please help!
I was going to guess 575HP as the cam is very mild with a wide lobe sep of 112. But you asked for a cam with mild street manors and you got it.
But IMO the peak RPM HP is lower then it should be. So you Do have more there untapped as of yet. mike
