Let's talk cams...

[NAILS]

pat,
a few suggestions id like to make..

A ROLLER CAM !!

pick any hydraulic flat tappet cam and a comparable hydraulic roller gives more average torque under the curve.. less stress to the lobes and lifters which ultimately provides better hp... we can go on for a while about comparisons but im just making a suggestion.

also, you can reuse roller lifters for the most part. i have been raised with the practice of matching flat tappet cams & lifters. it isnt recommended to mix/match flat tappet cams and lifters. im very confident in saying most engine builders dont recommend it.

 

[patmckinneyracing]

Well my biggest concern is addressing the valve springs I have.

I looked at them and they look to be double springs, but I want to say there's a dampener inside the spring?... Here is a pic of some Isky springs that look similar. I have no idea what the lift rating is on them and I'm worried that once I add on 1.6 rockers to a fairly large camshaft, I'm gonna end up with springs binding up and destroying the valvetrain.

http://static.racingjunk.com/63/ui/0/83 ... BC-305.jpg

The summit cam has served me well thus far, but it just has too much duration and a small operating range. I'm looking at getting 400hp/430lb. I am a torque guy and could care less about making a ton of hp up top, it's the launches that I want this car to get up and go. What you guys have to factor in is once I add the 1.6 rockers which give more lift compared to the 1.5's.