David Neibert
SCCoA Admin
I'm curious if the other people using Stiegemeier's big cam (240/240 .539/.539) are getting the same kind of HP & TQ numbers I am.
Since installing this cam in the spring of 2004, I've made numerous changes to my car and dynoed it several times. It doesn't seem to matter what the outside temp is (47f-95f) or how much fuel (10.8-13.8 AF) or how much timing (26-31 degrees) or how much I overdrive the blower (15%-24%) or how much exhaust restriction I've got (w/cats vs. no cats).
The car still pulls between 325 and 335 rwhp. Considering I have an AOD with a fairly loose non locking converter that's not bad and is still enough to run high to mid 12s, but it's a far cry from the power it was making with my old cam (usually 350-370 rwhp).
I've been told by more than one person, that my problem is with the cam having too much duration....especially on the intake side. Simply stated the overlap is causing too much of the intake charge to bleed off which results in less air and fuel getting into the cylinder. BTW, I only get about 130 psi doing a cold motor compression test. I think I was getting about 155 psi before.
I've ordered a new cam made from a billet blank that has much less duration and more lift (very close to my old cam). But before installing it, I'd like to know if others are having similar results with the 240/240 cam.
David
Since installing this cam in the spring of 2004, I've made numerous changes to my car and dynoed it several times. It doesn't seem to matter what the outside temp is (47f-95f) or how much fuel (10.8-13.8 AF) or how much timing (26-31 degrees) or how much I overdrive the blower (15%-24%) or how much exhaust restriction I've got (w/cats vs. no cats).
The car still pulls between 325 and 335 rwhp. Considering I have an AOD with a fairly loose non locking converter that's not bad and is still enough to run high to mid 12s, but it's a far cry from the power it was making with my old cam (usually 350-370 rwhp).
I've been told by more than one person, that my problem is with the cam having too much duration....especially on the intake side. Simply stated the overlap is causing too much of the intake charge to bleed off which results in less air and fuel getting into the cylinder. BTW, I only get about 130 psi doing a cold motor compression test. I think I was getting about 155 psi before.
I've ordered a new cam made from a billet blank that has much less duration and more lift (very close to my old cam). But before installing it, I'd like to know if others are having similar results with the 240/240 cam.
David