Vacuum this low normal?

[340Duster247]

I'm going on vacation so I'll update everyone when I get back.
I'm going to bump up the initial a lil bit and see if that helps. My old cams initial I had a 24* so Maybe I'll be able to get away with more.
Definitely not too lean at idle.
When I put in gear (warmed up) the engine only drops around 100-150rpm.
My idle mixture screws are 3/4 turn out. 4 corner. That's where it idles the best and best vacuum
Thaks for all the advice guys!!!

 

[MRL Performance]

Do you have a power valve in the carb?

 

[AJ/FormS]

I once ran the 292/509 mopar hyd. cam in my 360, with 1.6 rockers, 750dp, and 10.7 true c/r. I ran it from 4*retarded to 4* advanced. Lots of vacuum(IIRC 11inches). I measured that cam as about 239*@.050.It ran a little warm when new,but relaxed after a bit. I wonder if your intake is sucking air from the crankcase side. Not hard to prove. If thats ok, Id move to verifying the cam timing, not that I think thats the problem, but we gotta start with a firm foundation. Others here are offering excellent advice.PS, I ended up running that cam advanced. Seemed a bit torquier. Eventually I went to a much smaller(223*)cam, for better street manners.Hope this helps, AJ

 

[FrostyMopar]

I have a 254/254 solid grind in my 318 with only 14 degrees advance at idle and i get about the same vacuum. I really need to do something about my timing.

I'd say yours (vacuum) like mine, is lower than it should be.

 

[MRL Performance]

Another thing to look for, does the timing drop also when you drop it in gear???