Valve Spring Pressure

[Wild Blue 32]

What kind of valve spring pressure should I run on the seat and max lift. It's a 2.3 ford solid lift head with .525 lift. I've heard numbers all over the board from 90 on the seat to 150 on the seat. Thank you.

[Jb35]

Ask cam manufacturer. But I'm going to guess and say 110 to 120 at seat 240 to 260 open.

[car62]

you will get lots of different answers here,id suggest asking cam manufacture as recommended...personally id go a little more around 125-135 and 255-265

[Wild Blue 32]

The guy I bought my cam from told me 90 or 95 pounds on seat. Any more and it costs power. I guess i'll try that. Thanks for the responses.

[J.D. Laramee]

90-95 isn't near enough! 130-135 is a lot better numbers

[Wild Blue 32]

JD Are you saying the valves will float at 95 pounds?

[let-r-eat]

JD is spot on here. I'd be taking that 90 95 pound with a grain of salt. More spring doesn't cost power on these cars. Quite the contrary actually. I'd be more interested in controlling the valve motion.

[84Dave]

As suggested, talk to the cam manufacture. And also tell the manufacturer the rpm range you intend to run the engine. It makes a difference when it comes to spring pressures. -Dave-

[Wild Blue 32]

I talked to the guy that set up my head. He said he set it up with 115 pounds seat pressure. How will I know if Its not enough? Will I here the valves float or will it just not run high RPM? Thanks for the responses.

[Old Rob]

Correct valve spring pressure

First off, are you talking Hydraulic, Solid or Roller.
Hydraulic you should have between 95 - 100 lbs on the seat with no more than 250Lbs on the nose at max lift.
Solid, run 105 - 110 lbs on the seat and a max of 275 lbs at max lift.
Any more and you will have a short cam life.
Roller, run 115 - 130 lbs on the seat and a max of 300 lbs at max lift.
Valve spring pressure is not the only cause of valve float. Too tight of guides, and rocker to valve stem angle are also a factor.
Another factor is the cam asymetrical?

What kind of valve spring pressure should I run on the seat and max lift. It's a 2.3 ford solid lift head with .525 lift. I've heard numbers all over the board from 90 on the seat to 150 on the seat. Thank you.

[Wild Blue 32]

It is a solid cam. it seams to run really good. what do you mean is the cam asymetrical? It is 515 lift intake and 520 lift exhaust.