I might buy a car with HKS 272 cams in a 2.0 and during the test drive I noticed what seemed to have low vacuum, I'm new to camming out imports but even with a nice size cam in one of my v8's I had higher vacuum....although I know its like comparing apples to oranges also.

I know it depends on cam timing, ignition timing, stroke, the tune itself and the healthyness of the engine but what's everybody vacuum at idle and what rpm does your idle at?? This car I believed was idling around 1,100 I assume to help prevent it from stalling/loping/weak brakes with the low vacuum, etc...but curious on what everybody else's vacuum is at and at what rpm...

 

Mine is around -20 psi i think maybe alittle more and my idle is alittle over 1100.

 

Mine with Cosworth M2 cams is pulling right at 11 in/hg at 900 rpm. Feel free to PM me if you have any questions. Those cams shouldn't need to be idling that high. I had my HKS 272's idling at stock RPM with no problems.

Josh

 

My IX had 10-12 in/hg with FP4R's @ 900 RPM.

 

close to -20

 

I have HKS 272s on my 2.1L and it idles out just around -20in/hg

 

2.4l idle @ 900rpms with -17 vacuum

 

hks272's,900rpms and about 20 on mine also

 

-9 to -11 with cosworth m3s

 

My FP4R's sat at -14/-15 vacuum and idled at 1K

 

brian crover 272's @900rpms -20.

 

at 900 rpm im about -18

 

Cosworth Cams but don't know if they are M1 or M2 - can't get a hold of the previous owner. Idles around 1,000 with -17/-18 vacum

 

Evo VIII Kelford 272's 1062RPM/-10

 

10 for me at 1k rpm's with kelford 272's