well i was reading the article posted in another thread by david vizard
http://www.babcox.com/editorial/ar/eb90252.htm

and i got to wondering, how do they do it?
looking at a few threads here, i remember hearing a cam has only 230 duration, makes 400+ rwhp (although in a 383) and only revs to 6500 maybe rpms?
how do you make that kind of power with that small duration?
you have to be using 1.6 rr's as most do anymore
now, if you have an lca of 110 or less, isn't the cam going to want to rev more before it makes its peak power?

reason i ask is, i plan on doing heads/cam over the winter (this upcoming winter) and i will still have a stock bottom end
how would i get the cam to be about 230 duration, 1.6 rr's, good driveability somewhat, and make about 400 to the wheels?
emissions are going away in december here (thankfully) so i wouldn't be worried about that
but could you get a relatively small cam (like the 230 duration) with a narrow lca to make over 400 at the wheels and still say under, let's say, 6500 since i'd have the stock bottom end?
sorry for ALLLLL the questions, and all those numbers i used right above are just hypothetical since nothing is going to be ironed out until heads are done, etc.

 

ttt

 

It's easy we lie and make up numbers ;-)

LOL not really.

It's all part of the equation really. He has a set of very good heads to do that. It's not even pushing it in terms of what kind of power you can make with a cam like that. In the shop I have a motor that with the same cam and bolted into a car (because it sits in the corner of my shop now carless) would be over 500rwhp SAE. It's smaller than a 383 and it would drive like a baby.

The combination is the key. Intake, headers, heads, displacement, compression and all the little things go together to make one hell of motor.

The article you posted is something you have to understand inside and out, some people do and some people don't. It can be a lot of trial and error like posting dyno charts on a forum and going thru till you find the best one or you can have a good understanding of what works and get there in 1-2 tries rather than years of plugging away watching the results of others. You could do even better with a engine dyno and a controled environment dyno and lots of cam and valvetrains to test find even more power, but the cost ot the end user would be unreal.

Bret