383 cam advice?

[273]

I’d like to see a cam shoot out where they keep lift and overlap the same and change the duration to match overlap with different Lsa.

 

[rumblefish360]

Huh?

 

[273]

Huh?

I feel overlap is an very over looked cam spec, like to see what the same overlap with different lsa would do to the powerband

 

[RustyRatRod]

It would be sooo interesting to hear your opinions after your test run!
With that narrow LSA it should make a lot of power from the bottom. I'm sure you will get tears in your eyes if you're behind LOL

Actually, that's sorta backwards. The tight LSA has more of a peak power. The wider LSA has a flatter torque curve, usually giving up a little at the higher RPM ranges for more bottom end and mid range. You can see it on a dyno program if you change back and forth. Sometimes, it's pretty substantial. That's why I generally recommend a 112 and sometimes a 114 for a 100% street car. Much like the factories did.

 

[rumblefish360]

I feel overlap is an very over looked cam spec, like to see what the same overlap with different lsa would do to the powerband

The amount of Overlap is due The LSA. How can...
OH nevermind

 

[dartgarth]

This might help

Camshaft Comparison Testing

I followed this mantra with a hydraulic roller on my build. 383, 10:1 custom pistons, mild port on the heads, Ferrea valves, 1.6 rockers, performer RPM intake, Holley Sniper injection, CPPA (tti now) 1 3/4 headers. I had a custom cam ground by http://jonescams.com/ 264/272 seat, 217/225 @ .050 .340 lift at cam .544 at valve, 109 LSA installed 2 degrees advanced. I had very similar numbers on the dyno to the Hot Rod article....

Runs great loads of power and torque, idles well with a distinct lope.

Garth

PS I have this cam that I'll sell if you want it. Crane Hydraulic Roller Camshafts 689511