Can anyone chime in on the performance difference in a btr stage 3 and stage 4 cam....I had a stage 4 but I had ptv issues with 2 sets of stock 243 and 799 heads so we decided to go down to a stage 3

 

Hmm that is odd. I am running the stage 4 with stock 243's and haven't ran into a problem. I didn't check clearances but the car sees 7k rpms every time it's driven.

 

Yea it is odd another guy with a gto had the same problem I had and strangely we bought our cams around the same time

 

I am running a gmpp stage 2 camshafts in my ls3. It does not have a lopey idle. It sounds more like a baby copo than anything. It is very surge below 2,000 rpm. At 3,000 it is like a light switch to 7,000rpm. All business. I like it now. Hated tuning it. 34°-37° of timing from 3k up. Peak tq @4600 peak hp@6600.