How to calculate effect of different cams?

[TERRA Operative]

Ok, I'm currently planning a decent blacktop build for my AE101 Levin.

I'm trying to work out what cams I want, and all I can find is nebulous suggestions that aren't much help at all...

Is there any way I can calculate the effects particular camshafts have on an engine (torque and power delivery in the RPM range etc)? Even approximate calculations would be better than the info I've found so far.......

[Billzilla]

Use a good engine simulator, such as Engine Analyser Pro 3.3
I've used it for years and got excellent results with it.

An example -> http://www.billzilla.org/engvariable.html

[TERRA Operative]

Sweet looking software. I'll check it out.

[andrew_mx83]

u can download dyno 2003 for free off a torrent if that helps

i couldnt find eng analyzer pro as a free download anywhere and it sounds like it needs a LOT of info about the engine to work

[Chrisso]

You do need a ton of info for engine analyzer, but if you're going for a serious build you should have all of this anyway. I've only played with it a few times, but I liked the program.

[TERRA Operative]

Yea, I got engine analyzer pro. I've almost got all the info sorted. Looks like a pretty good bit of kit.

Just need flow rates for the blacktop head and throttle bodies...

[andrew_mx83]

what size tb's?

i have found that my 40mm dellortos are around 260cfm per venturi if that helps at all.

[TERRA Operative]

The blacktop TB's have a butterfly size of 45mm IIRC.

[andrew_mx83]

supposedly 45mm TBs flow around 290cfm.