How much vacuum is your car making at idle especially with cams?
Jan 2, 2011, 05:15 PM
#25
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...
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...
Also, if it has stalling issues then biss can get adjusted. (base idle set screw). . if that does not fix the issue then you can adjust the Desired ISCV tables in the ecu which control the idle air controller stepper motor.
Cool thing about these cars is, the stock ecu is so strong that you dont even need a aftermarket ecu to get your $'s worth mod wise.
