Originally Posted by 69-chvl

I realize this is highly subjective, but I believe my L94 with a BTR Stage 2 LS3 cam idles pretty bad at 13" of vac at about 800. Car shakes pretty bad, but runs and drives excellent otherwise. I read all these threads about how people with much bigger cams use the word "mild" but I can't see how that is possible. I moved the timing and AFR all around and not much changes. I had a professional assist, not much different. Is this about it, or is this something about the BTR cams that makes them a little rougher?

Combo - L94, BTR Stage 2 225/238 .620/605 113 lsa 113+3, LS3 intake/DBW TB/injectors, headers/Holley TermX/TH400/

Thanks

Originally Posted by kinglt-1

I would say what you are experiencing is normal for that amount of overlap. Ime anything with positive overlap will chop.

Here is a 224/228 112 in my old LS1 car w/ 850 idle.

https://www.youtube.com/watch?v=8wgKAPy5VkQ

Originally Posted by LilJayV10

I'd venture to guess 55kpa is pretty damn good for that cam. Stock is low 40's?

My junk idles at 75kpa....

Originally Posted by 69-chvl

Sounds great - and rowdy. I guess any positive overlap will allow exhaust to back up into the intake. So should I insist on a cam with no more that 0 overlap???



55-56 in neutral, 59-60 in gear at 800-850. 75kpa that motor must be ready to jump out from under the hood lol

Originally Posted by Saber-1

Not quite your build but it’s a good example of how it should be.

https://youtu.be/1PV9Z7zweus