Hey guys. Just looking in general to get some input on what kinda vacume you guys are pulling at idle with bigger cams.

NOT: gsr cams / itr cams, i'm looking strickly for aftermarket numbers.

 

About 20"Hg to high 19"Hg with Skunk2 Pro2+'s.

 

18ish with crower 402t's

 

Around 20" on comp 57200

 

8-10"

 

ok so maybe mine isn't that bad. I was so used to my old ls motor with stock cams pullin like 20.. When i saw my gauge readin 15-16 i thought it was odd & figured it had to be something with my cams.

I don't have any vacume leaks, i've checked everything over real well to assure my self of that. I've got a set of custom ground cams in here that are compairable to some skunk2 stage 2 NA cams.

I'm wondering if i advance the exhaust cam gear a degree or so, to remove the overlap, if that might give me a little more vacume. any thoughts on this?

the whole reason i'm getting at this subject is because my tial bov isn't opening like it used to due to the change in vacume.. i might just have to order a spring but figured if i can make an adjustment to compensate then i could save my self the hastle & money of ordering & replacing the spring.

*EDIT: Cam Spec's

Intake: 0.485, 252
Exhaust: 0.466, 262


Modified by Running925 at 8:40 AM 5/2/2008