74 XB Fairmont
Join Date: Sep 2001
Location: Cranbourne, Vic
Re: Should I get 3V's bare or built?
To setup my heads cost me around $300-$400. Heads cost well above $3000 complete at the time I bought. So I saved plenty at the time. The Isky springs are triples. The dampener is still a spring.
To work out whether the Isky's are suitable? They can handle upto 650thou lift but really a cam with 650thou lift doesn't have 650thou. You have to minus the lash adjustment. For example 22thou. So really the cam only had 628thou lift.
Valves are the expensive bit. After I had issues with valves I spent just over $500 on better valves which I've since replaced again! With better ones.
If you valves are 2.19 and 1.71? You'll come out of it pretty well. As you just cut the valves back to 2.150 and 1.650.
The Isky 8005a spring in my combo has gone from 410lbs open to 394lbs open since I've owned them. 16lbs loss is pretty good for a spring. My other springs lost a little less they went from 340 something to 334lbs open.
The complete prices are pretty good. At traded it's damn hard to even assemble them for the same cost. Do your sums and see if it works out cheaper via your sources? If it does buy bare. If not buy complete. John will supply better springs if you need them?
XB Fairmont (street car) firstname.lastname@example.org.