Checking PTV?
04-30-2007, 07:40 AM
#1
Checking PTV? I'll be installing a pair of patriot stg3 heads w/ the vengeance cam. It is stock height w/ the 2.08 intake valve and 1.60 exhaust. Would the valves effect PTV? Do these kind of valves hang lower? I was just going to flycut .030 and not bother to measure. But should I measure the PTV and hope there's enough room. Do I use the heads I'm going to use to measure the PTV? What is a good method to measure my PTV? Needs as much info.
04-30-2007, 05:26 PM
#4
Yes, those valves have a huge affect on PTV clearance. Not only because of the diameter but because of the margin (the part that hangs down into the piston beyond the contact point of the seat and valve) Here's how I checked PTVC:
https://ls1tech.com/forums/showpost....64&postcount=6
https://ls1tech.com/forums/showpost....64&postcount=6
04-30-2007, 05:51 PM
#5
Originally Posted by Xtnct00WS6
Yes, those valves have a huge affect on PTV clearance. Not only because of the diameter but because of the margin (the part that hangs down into the piston beyond the contact point of the seat and valve) Here's how I checked PTVC:
https://ls1tech.com/forums/showpost....64&postcount=6
https://ls1tech.com/forums/showpost....64&postcount=6
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05-01-2007, 05:11 AM
#9
Originally Posted by Xtnct00WS6
Yes, the heads have to be on to test PTVC. If you use stock TTY bolts, you'll need 2 sets. I'd recommend getting ARP bolts or studs though. If you use the clay method, you'll need a solid lifter of some kind.
05-01-2007, 07:18 AM
#10
Originally Posted by vettenuts
Why not just use the old bolts, tighten to 30 lb-ft or some lower number. You don't need to preload them, only take out the clearance.
