I picked up a ls3 cam for near nothin and was wondering if anyone else has ran one in a 4.8l. I already have springs. Cam will be goin in a 09 crew cab. Ls3 cam specs are 204/211 .551/.525 117.

 

$118 LS9 cam or bust

 

Wouldnt the ls9 cam be to much exhaust duration and the lobe separation on a 122? Wld think it be a bit much for a crew cab? Or wld it work good?

 

Don't worry about the LSA, degrees overlap is more important.

Stock 4.8 cam 45*
LS6 cam 40*
LS9 cam 39*

 

What is the degrees of overlap on the ls3 cam?

 

LS3 has 36*

FWIW I have no experience in forced induction, my suggestions are solely based on the popularity of the LS6 cam for forced induction. Since the LS6 and LS9 are only 1* difference in overlap it would seem like it would be a better choice than the LS3 cam.

Ask some of the experienced FI guys, I'm sure they could explain the needs of your setup better than I can.

 

In your other thread someone said 1st version of the LS6 and the current LS3 are both 204/211 so it will be the same. There is other factors to consider than duration, here are both cams compared.

Old LS6- 204/211 .524/.524 116 LSA 118 ICL 39* overlap

LS3- 204/211 .522/.551 117.5 LSA 120 ICL 36* Overlap

 

Cam in and seems to pull a lil harder on top end now.

 

In your setup I would have went with the LS3 if you got it for next to nothing, the LS9 is to heavily exhaust bias for a turbo setup in my opinion. The LS9 is also setup for a rect port intake port and a supercharger, this is the reason for the heavy exhaust bias.