Recently bought a set of Pro Comp 3002 aluminum heads the guy i got them from could not tell me what valve spring was on them ,they either come with a hydraulic roller valve spring or a flat tappet valve sprig how can i tell what is on them ,
buy new springs for the cam you will be running, then you will know.
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Generally a flat tablet cam will have a single spring, hydraulic rollers will have a single with damper or dual. Of course there are exceptions to this rule but for 90% of the generic heads this will usually be the case.
A quick spring rate check will also highlight which one you have.
You should be able to have your machinist pull a couple and test them.
If they were assembled from ProComp and not a local, I wouldn't trust 'em regardless of the readings.
Hate to agree with Ed, but why take a chance? Buy quality springs with the pressures and rate recommended by the cam manufacturers. Valvetrain will be worth a lot more than the head castings, but who's counting?
Organized people are just too lazy to look for their $h!t.
cant find any info on these heads as to what size spring they take, there use to be page that had all this info .
It's a crap shoot.
I wouldn't do anything until the heads are inspected and checked for installed height, and correct retainers / keepers, etc.
Hydraulic roller and solid flat tappet are going to be very similar in spring requirement.
Race only solid flat tappet with stainless valves I like to keep seat pressure 130-135-ish and over the nose pressure under 400, about 350-370-ish, considering my use is 98% under 6600 rpm's.
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