The Ford Barn

Ol' Ron · 01-21-2018, 03:18 PM

The original CT L-100 had .375 for both intake and exhaust. with .016 clearance, Thus aprox .360 net lift. However, on a reground stock cam, allot of material is removed from the base circle to get that much lift. I consider any cam over .350 net lift a hi lift cam. again the Isky 400jr ground on a billet would still have allot removed from he base circle due to the fact it must fit through the cam bearings. I'm also Conservative when I build a street engine. I look for reliability and economy, anlong with long life. Thus 50 lbs of valve spring pressure.

01-21-2018, 03:18 PM	#22
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,985	Re: milling iron heads The original CT L-100 had .375 for both intake and exhaust. with .016 clearance, Thus aprox .360 net lift. However, on a reground stock cam, allot of material is removed from the base circle to get that much lift. I consider any cam over .350 net lift a hi lift cam. again the Isky 400jr ground on a billet would still have allot removed from he base circle due to the fact it must fit through the cam bearings. I'm also Conservative when I build a street engine. I look for reliability and economy, anlong with long life. Thus 50 lbs of valve spring pressure.