Valve Spring preasure recommendations.

[Doug_Guilds]

I just bought a head and it has a 528/538 solid lifter flat tappet cam in it. what seat preasure should i be looking for in springs? Does 120 ish sound right? I looked up the info for the cam and it's a Race Engineering cam but no recommendations on springs. Also who sells the best springs?

Forgot to add that this is for a 2.3 Ford.

[let-r-eat]

Crane 99884 is a good little spring for that installed at 1.550. That's around 127 or 28 on the seat.

[Jb35]

I would shoot for 110 pounds at seat. That should be safe to 8000 rpms I think. 120 is a little much Iwould think. I've run as low as 100 with a cam close to that size up to 8300 rpms. The more pressure from your springs the more horsepower your killing. I get springs from crower most of the time.

[Doug_Guilds]

Thanks for the info so far! One thing I am wondering also is, what can we use to test seat pressure on the 2.3 ohc? I see a lot of pressure testers but they don't appear to be usable on an over head cam set up.

[let-r-eat]

romac tester and a height mic during installation?I don't test any while they are installed.

[J.D. Laramee]

If, That cam and rockers have been run together, previously broken in, 130 on the seat is good. I get most of my springs from Howards or Schneider. 110is not enought pressure for that cam, It has a pretty aggressive lobe. I still set up heads at 130-145 on the seat, and flat tappet,Hyd. or solid.,Joe

[84Dave]

PAC beehive spring. I've used them for years on my paved oval engines. Have never failed one. And PAC will nitride them, which adds life. www.RacingSprings.com . -Dave-