Here's my dilemma. I think I may have gotten too big a cam for my car and
I'm thinking I've screwed up enough that I have a very narrow powerband.
The problem I'm getting is I get gobs of torque in 2nd gear up to red line
but once I shift into 3rd, I'm chugging along and my engine isn't building
up enough speed to keep the supercharger at 7lbs boost (more like 3 or 4).
I've got an SLP cam in it. Here are the specs:
duration, 1.5 lift, 1.6 lift, Lobe sep.
206/214 .470/.490 .501/.522 112deg
I know it's not a supercharger cam which I should have gotten but I put the
supercharger in after the cam so by then it was too late. Anyhow, it's a
1989 305, TPI with a bunch of mods, siamesed runners, intake and plenum
siamesed and ported. 52mm throttle body. ATI procharger (max 7lbs)
My question is this: I'm thinking I might be getting some valve float.
Will going back to 1.5 ratio rockers be of any benefit. In my head, it
seems that if there's less lift, there should be a less chance that valve
float would occur. Is this sound reasoning? I'm currently using 1.6 roller
rockers on the intake side and 1.5 stock rockers on the exhaust. I would
have used 1.6's on the exhaust side but I don't have enough valve clearance
and I didn't have 1.5 roller rockers to put in at the time (I do now). So
what is your recommendation? Switch all the rockers over to 1.5 roller's or
keep the 1.6's on the intake and put 1.5 rollers on the exhaust?