Spring Pressure

What is the recommended spring pressure (closed) for blown hemi, 32psi boost? Feed back would be appreciated - Thanks

 

Spring pressure is a determination of a few things.
RPM is the most important. Weight of valve is second. Also, how strong is everything underneath it. You want to put as much pressure as you can without hurting what is underneath it. (Pushrod, lifter, etc.) Also, how often do you want to change stuff out.
I hate to say it, but until we know some of that, we can't really give a very good answer.

 

This a top dragster, not going to rotate the world and don't want to change parts every weekend. Titanium valves (don't know the weight), cam-x rollers, mantron pushrods, erson cam.

 

when i put my first hemi together several years ago 340lbs at the seat was the norm now i went to the 400lbs at the seat to me its a little harder on the valve but there are guy running a lot more than that im sure there are still are several different ways to run on depending on the size of motor, cam style of head

 

Thanks for the info. I was thinking 380/400 would be ok. Just looking for input based on experience.

Thanks again

 

I do the same as Jim..dave

 

Hi Dave,
We spin about 8200 rpm with our fuel altered, 32 lbs boost, Tittanium intakes, stainless exhaust and we run 340 lbs on the seat. Easier on the valve train than 375 or 400. we have been to 8800 rpm with no problems.
Ricky
P.s. got my blower gel and check is on the way.
Thanks