How much vacuum should I have at idle? I think I pulled 14psi last time I checked. Would an aftermarket cam affect that?

If its low, I just can't seem to find the leak. I spent some time today following all the vacuum lines that I know of with the propane tourch listening for increased idle, but found nothing. Is there a better test for this?

 

Not sure what it should be stock. I'm pulling 17 In/mg myself, and I have a Cam. I would guess that you either have timing issues, or a bad vaccumn leak. If it's not those things, It's mechanical 9burnt valves, rockers too tight etc.). I'm not sure if it's within specs, but it sure sounds low.

 

I have a very mild cam pulling 19"

Stock is right around 20"

Both @ 1000rpm

The bigger the cam, the less vacuum you will have.

 

I thought mine was around 18 @1000 on stock cam?? I may be wrong.

 

When I checked mine, it was at 750 rpm, i should try it at 1000 to get a better comparison