I feel there is one that will work better. The stock one has to comprimise to meet certain standards and such. Works good stock but not for maximun ouput.
My only issue is that cams will lower dynamiccompression so with my 1.9 head it"ll get a little more finicky depending on the cam. May try to put 1.6 precups in my 1.9 head. Than i can afford to mill the valve reliefs. I'd be happy with 20:1 or so. I also think a custom or gasser long runner would help no to low boost opereation when combined with a cam.
I feel there is one that will work better. The stock one has to comprimise to meet certain standards and such. Works good stock but not for maximun ouput.
My only issue is that cams will lower dynamiccompression so with my 1.9 head it"ll get a little more finicky depending on the cam. May try to put 1.6 precups in my 1.9 head. Than i can afford to mill the valve reliefs. I'd be happy with 20:1 or so. I also think a custom or gasser long runner would help no to low boost opereation when combined with a cam.
I seem to recall that all of the precup inserts are of the same volume, it's the volume milled into the head that changes from engine to engine.
I was going to put 1.5 precups in a 1.9 head to be placed upon a miller-cycled 1.6 to get back up into the cold starting range, but measuring the 1.5 and 1.6 precup inserts gave me the same numbers...
Huh that dosen't make it easy for me.