331 power on desktop dyno

[turboranger83]

i downloaded the desktop dyno 2000 on my computer. i put in the 331 combo that i wanted and came up with 510hp @6500 rpm and 443 lb.ft.tq. @5000rpm. the combo i put in was:
3.25 stroke
4.030 bore
afr 185 heads
10.50:1 compression
750 carb
single plane intake(victor jr.)
small tube headers w/muffler
xe282hr cam

the question is this; are these numbers actually possible? what kind of springs doing i need to rev the cam up that high?

 

[nmcgrawj]

i downloaded the desktop dyno 2000 on my computer. i put in the 331 combo that i wanted and came up with 510hp @6500 rpm and 443 lb.ft.tq. @5000rpm. the combo i put in was:
3.25 stroke
4.030 bore
afr 185 heads
10.50:1 compression
750 carb
single plane intake(victor jr.)
small tube headers w/muffler
xe282hr cam

the question is this; are these numbers actually possible? what kind of springs doing i need to rev the cam up that high?

Is that flywheel or rear wheel? I have seen those programs be kinda close sometimes....and others i have heard of them being WAYYYYY off. That seems like a bit much of power from a 331. Maybe someone with a combo similar to that can come tell u what to expect.

 

[hllon4whls]

The program calculates flywheel HP.

 

[matm347]

I assume the hr at the end of the cam number is for hydrolic roller? If so, it's the lifters you'll need to worry about when revving that high. But you'll want to keep your shift points under, but right around 7k...my stock style lifters work up at that RPM, but not as good as some aftermarket would. Crane makes their anti-pump lifters and I think AFM makes some as well.

But that figure does seem a tad high, I'd believe it if it were with a perfect tune running a solid roller cam though.

 

[hllon4whls]

I used that program to predict what my car would run. Looked all the specs up for the cam and input them. Had to approximate on the heads.

Built the motor in desktop dyno and then raced it in desktop dragstrip (whatever they call it). Pretty darn close. IMO it gives a ballpark figure.