I'm looking into getting a set of trick flow oval port heads for my BBC. I have a couple of questions.

I have an isky 292 megacam but I have compcam 925 springs and was wondering if I can use them.
Would the springs on the fully assembled heads be ok right from trick flow or is it too much spring?
Or would I be better off buying bare heads and go from there?

Thanks, I'll get some numbers if anybody wants them.

Trick Flow probably gives lift specs on the supplied springs, do you know what those numbers are?

Here are the specs for the trick flow springs

Valve Springs, Standard:
1.530" o.d. double with damper
138 lbs. @ 1.950" installed height
430 lbs. @ 1.250" open
420 lbs. per inch rate
.700" maximum valve lift


Here are the specs for what Isky recommends

8005-A
TYPE:dual w/damper
DIA.:1.530"
RATE:400 lbs per inch
INSTALLED HEIGHT: 1.875"
SEAT PRESSURE: 135 lbs
OPEN PRESSURE: 395 lbs
COIL BIND: 1.160"

Thanks for the reply, every time I post something no one replies, I guess my questions are too in depth for a lot of people. I know the values are pretty close and I've been building engines since I was a kid and have always used the full valvetrain kits on performance engines. I think they'll be o.k. but I just need a second or third opinion. Plus this one is going in my chevelle so I want to be 100% sure.

Thanks again, :beers:

Josh

Springs will lose some pressure after awhile so I would think the trickflow springs would be alright. Your cam lift is only .590 so you will not have a problem in that aspect

Thanks for the help.

Josh

You could take some of the shim out of TF's to reduce the pressure. I would ask Trick Flow for a spec on the installed height you need. They might be able to tell you how much shim needs to come out for your cam. If not, you could bring either spring to your machine shop for a test of installed height.

If that's a double spring I'd pull the inner for break-in and carefully observe best practices for lube and break-in.

I'd check (machine shop valve spring tester) the springs for pressure @ height as they are installed, don't take their word for it.