which one?
going in a 5.3 heads have been worked: .05 milled, larger valves cc has been unshrouded
7.35 pushrods

truck already has 3k stall in it with 3.73 rear end, will eventually have full compliment of bolt ons. Will turn around 6500 rpm at wot, looking for cam that starts around 2k rpm.

thunder racing cam: 224/224 .563/.563 112
comps XR275HR: 222/224 .566/.568 112
lpe ls1 gt2-5: 222/222 .566/.566 112

not a cam guru
ultimate goal 350/400 rear wheel

 

I may be bias here, but I really love my TR224!!!

 

did you go with stock pushrod size?

 

i would think that with the milled heads that might be an option for you. i dont think any of those cams will start at 2000 rpm's either. even the 216-220 cam i had started at around 2200 and above. with a 3000 stall that should not be a problem at all.

 

Those 3 cams are virtually identical, you don't need to be a "guru" to see that. There have also been numerous "success" stories from people running each of the 3 different manufactures. I've always liked Comp Cams. I have run several Hydraulic cams from Comp in the past in different cars, and I have a solid lifter cam from Comp in my '57 Chevy now. When degreeing in the cams from Competition Cams they have ALWAYS came up "right on" the money. I've run Crower cams and also a Competions cam in other small block Chevy motors (non-LSx Gen I motors) and have had their Cams come up off as much as 6 degrees! I've never run a cam from Thunder or Lingenfelter, and I'm sure they are great products...but I CAN tell you that Comp Cams is definately a GOOD choice. Do a search in the internal engine section under Cam Degreeing and you'll see what I mean.

 

I was thinking that out of the cams listed some might be better because of a more exagerated ramp rate and would there for be better to go with, getting the valve to max lift faster.
anybody now if the rates are different?

 

The TR224 is the most aggressive.

The Lingenfelter is a Comp # 3714
The TR is a propritary Comp lobe.
The Comp is # 3714 & # 3715

 

I was gonna chime that too. Thunders got more agressive ramps.

 

I'm still running stock pushrods.

 

interesting

You always here, when you see over 6,000rpm it's time for new pushrods.

..hm