drinknfountn

I took my motor to the dyno & didn't start to make torque until 4700, peaked out at 5800, 675 horse. It's a Chevy 540 w/Brodix intake, BB2+ heads (ported), 1050 Dominator carb, & it has a Crane cam 610 intake lift, 632 exhaust lift, 112 lobe separation, duration 298 intake, & 306 exhaust. Dyno guys says too much duration on exhaust, holding valves open too long, blowing raw gas out of exhaust. Can jet down doesn't make much of a difference, still rich. This is the 2nd cam I've put in the motor & neither one seems to be the one. Going broke trying to trouble shoot this. The guy dynoing is a "car guy" the guy that built the motor is a "boat guy" but doesn't build many motors. Where I live only 1 close to me is Sterling and don't have pockets deep enough for him. So, if anyone could give me some input on what cam shaft I should run or why this cam won't work, I'd greatly appreciate it.

GPM

where is the cam in the motor, lobe center? what are the .050 numbers?

Griff

There should be no problem with that cam in a 540. Its a crane 741 and plenty of people run them in 502's.

Actually, 675hp @ 5800 sounds pretty decent. Thats if he's got the dyno set up right.

To bring the torque curve down, you could advance the cam. I would also think about trying a smaller carb.

drinknfountn

I appreciate your feedback, however I am not much of an engine guy (at all) so I don't really know what you are referring too. I'm not sure if it is lobe center b/c the dyno guys were setting it up. What is ".050 numbers"? Sorry for the ignorance, but like I said, I am not an engine guy

woody1

whats the duration at 50 thousand, got the cam card?

Vinny P

If you are not sure of the cam numbers, post the cam grind # or part # and brand. Your dyno guy will know what advancing the cam means. Basicaly it means offsetting the valve timing to make it happen a bit earlier or later, depending on what you prefer.