The Ford Barn - View Single Post - Isky 404A cam

Bored&Stroked · 04-17-2024, 07:33 AM

I've checked the double springs against the Isky 185-G springs and the 185-G springs are actually better. I have no idea as to why Ed created the dual-spring package . . . other than to claim it was better and as part of the overall marketing of the 404-A. You should be fine with about 80 lbs on the seat - which is easy to obtain with the 185-G springs. I'm running 185-G springs on my flathead roller cam with 100 lbs on the seat (and heavy roller lifters) - have had the engine over 6200 RPM and never floated a valve . . . and my intakes are 1.72". For a full-on race engine, you might consider light titanium valves anyway (that is what I'd do).

04-17-2024, 07:33 AM	#64
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,201	Re: Isky 404A cam - Harley Davidson grind? I've checked the double springs against the Isky 185-G springs and the 185-G springs are actually better. I have no idea as to why Ed created the dual-spring package . . . other than to claim it was better and as part of the overall marketing of the 404-A. You should be fine with about 80 lbs on the seat - which is easy to obtain with the 185-G springs. I'm running 185-G springs on my flathead roller cam with 100 lbs on the seat (and heavy roller lifters) - have had the engine over 6200 RPM and never floated a valve . . . and my intakes are 1.72". For a full-on race engine, you might consider light titanium valves anyway (that is what I'd do).