I am building a 292+.030 for a street driven nostagic Hot Rod or 59 Edsel. I have a set of G heads and new Schuman valves. The springs I am going to have my machine shop use are Schneider #68030. These are a single spring with a press. of 110lbs seat and 320lbs open. The cam is a Isky 301444

Is to much spring pressure for the Isky cam OR just about right.  Thanks for all info

Rick

Does that cam have a more common designation? ( Like E-2 or ?) And what is it's recommended RPM range? Have you checked with Isky for their recomendation ?

Paul

Seat pressure sounds good but if that 320# is the over the nose pressure, then it’s on the high side.

Lorena, Texas (South of Waco)

It is a E4 with .425 lift rpm range 2000-5000  A very mild cam. I did write to Isky tech line for there recomemdation.

I am sure they will say to buy there springs, Thanks for the help

Rick

Rick, I would lower the spring pressure in the range of 100 lbs on the seat and try for approx 270 ish open. Our lifters don't like real high pressure for longevity. I'm running 100 lbs on the seat and around 260 lbs open with the bee hive springs and accidentally hit the 7000 rpm limit a few times ( I don't recommend that ) with no problems. This is just my take on it.

-Gary Burnette-

I agree that the 320 is too much. Any idea what the installed height is seated and how much it is open for 320lbs? I suspect that that cam will not have enough lift to get to the 320lb figure, anyway.


Lawrenceville, GA

After more checking with Schneider that 320lb open spec is at .600 lift!  My small lift cam should be ok.

Thanks for the replies

Rick

If it is of any interist I messured a stock spring yesterday and this is what I came up with.

90lbs @ 1.750"  (Seat pressure)

195lbs @ 1.312"

210lbs @ 1.250"

Stock springs should be good for at least 5000 rpm so go from there.

   God Bless.   Tim                           http://yblockguy.com/

350ci Y-Block FED "Elwood", 301ci Y-Block Unibody LSR "Jake", 312ci Y-Block '58 F-100, 338ci Y-Block powered Model A Tudor

tim@yblockguy.com  Visalia, California    Just west of the Sequoias

I would check the Isky specs for that cam. They are well engineered kits if you use their springs and retainers. Certainly worth looking into. Good luck.

Jim

Tim: Just for clarification, I've seen stock spring pressures listed in a couple of places but the only one I can put my hands on at the moment, is from Eickman' Y-Block book. The pressures you are listing as stock, I think are well above the minimum, the book lists. I think seat pressures stock, are around 70 lbs at 1.780 & maybe 155 lbs or so at 1.390. What you may have there, are close to what Schumann's Sales lists as Police duty springs. Stock (new) springs were only rated to 5400 RPM. However, I'm not positive of my info..?

Paul