Confused yet again

[mudchucker]

Originally Posted by Dark_5.0

Reguardless of wether or not you keep the speed density or convert to mass air the E-cam wont do you much good in a stock engine.

1.6 and 1.7 is the roller rocker ratio. With the E-cam and stock heads 1.6 roller rockers is what you would want.

Mass air is better but you can run 11's on speed density.

Dark, what would you recommend for modifications to get the most gains with the E-cam and speed density?

[~The Jester~]

HEADS.

and an intake. Big cams don't do much good if the intake/exhaust sytem can't utilize what the cam brings to the party. That intake and stock heads can only flow so much air/fuel, no matter how far the valve opens, or how long it stays open. That's where you run into "killing" the engine with too big of a cam. Ya loose port velocity. Think of it this way. You have a 1/2" garden hose that you wash your car with. Inside the house, there's a 1/2 copper line that feeds the 1/2 spigot. With me so far? What would happen if all we did was switch the spigot with a 3/4" one? Might get a little better flow (read as power) but prolly not. What happens when we put a 2" valve in there instead? The water gets lost in the big valve now, and not much comes out the hose, we lost our velocity.

A VERY crude metaphor, but you get the idea. Simply adding a cam nets you very little horsepower. When selecting a cam, planning for the future is a good idea. In fact once you add the other goodies, that new cam will keep adding to the mix.

Make sense? I hope so. Just tryin to help ya out!

[mudchucker]

Originally Posted by ~The Jester~

HEADS.

and an intake. Big cams don't do much good if the intake/exhaust sytem can't utilize what the cam brings to the party. That intake and stock heads can only flow so much air/fuel, no matter how far the valve opens, or how long it stays open. That's where you run into "killing" the engine with too big of a cam. Ya loose port velocity. Think of it this way. You have a 1/2" garden hose that you wash your car with. Inside the house, there's a 1/2 copper line that feeds the 1/2 spigot. With me so far? What would happen if all we did was switch the spigot with a 3/4" one? Might get a little better flow (read as power) but prolly not. What happens when we put a 2" valve in there instead? The water gets lost in the big valve now, and not much comes out the hose, we lost our velocity.

A VERY crude metaphor, but you get the idea. Simply adding a cam nets you very little horsepower. When selecting a cam, planning for the future is a good idea. In fact once you add the other goodies, that new cam will keep adding to the mix.

Make sense? I hope so. Just tryin to help ya out!

Ok, that makes sense, i have never thought of it in those terms (which totally makes sense now). Would you port and polish what is there, or would a nice aftermarket be a better choice? Thanks for your help Jester.