Originally Posted by bygddy
OK, so it has 920 heads on it now, and why the hell would it have this? Guage reads real real low on oil pressure, no noises or knocks, but like virtually zero at idle....would the remote cooler and filters affect this?
The 920's are one of the better prefered 76cc open chamber heads.
The turn out good when ported. Much better than the 882's. The ast cast ports are better and will turn out better, once ported.
A good 76cc head to start working with for a low buck blower motor.
I have a set here too that are almost done, for my blower motor project.
I just drill and roll pin the rocker studs on mine, when I port them.
The 920's actually turn out better than my infamous ported 305HO heads do.
Just with the larger low compression chamber. They need generous porting. 2.02 x 1.60 best for these.
For the supercharger you don't want to chave them any more than nessessary.
low cr is better.
No idea on the low oil pressure. What is the oil pressure at 2000 rpm with the engine fully warmed up.?
That is what matters.
You don't need a lot of oil pressure at idle. As long as the oil light stays off and the lifters don;t tick its enough.
rev it up and read the oil pressure @2000-2500rpm. (warm engine)