PRC LS7 heads question.
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Joined: Sep 2012
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From: WV
PRC LS7 heads question. I bought a used tsp ls7 a few months back and am trying to figure out the heads on it. All it says on the build sheet is PRC cnc ported ls7 cylinder heads with hollow stem intake intake valves with 1.290" dual springs and Ti retainers. It looks like they have bronze guides by looking down the ports. But it says nothing about the exhaust valves. Id like to know if it has stainless exhaust valves and if those hollow stem intake valves are any good. Ive contacted texas speed and didn't get too much out of them since it was built it 12/07. Any help would greatly be appreciated. Anybody else have these heads?
Unfortunately we cannot pull orders up that far back to see 100% sure what was done. We always change out the exhaust valves. Back then, we would have put a stainless steel valve in it. About 90% of the time the guides are replaced as well so that is why you are seeing bronze guides in there. The hollow stem intake valves work well though Titanium is a better option as they are still lighter. Though some people don't want to pay for the upgraded Titanium valves over the Hollow Stems. My guess is this was a new head and not a customer supplied head. Otherwise they would have just reused their stock titanium valves.
Lonnie
Lonnie
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Last edited by Sales3@Texas-Speed; Nov 6, 2014 at 01:07 PM.
Thread Starter
TECH Regular
Joined: Sep 2012
Posts: 445
Likes: 0
From: WV
Thanks for the help. I figured they was stainless by looking at the options on the sight the other day. So you guys have your own extra porting on these heads correct? If so is it the same porting that would've been done back in 2007? How much would it be if I bought a set of titanium intake valves through you?
Thanks for the help. I figured they was stainless by looking at the options on the sight the other day. So you guys have your own extra porting on these heads correct? If so is it the same porting that would've been done back in 2007? How much would it be if I bought a set of titanium intake valves through you?
Lonnie
__________________
NOW OFFERING TSP BY YANK CONVERTERS
COMP - FAST - PACESETTER - WISECO PISTONS - LUNATI - CALLIES - NEW TSP BRAND CRANK & RODS - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - ARH HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - PRECISION INDUSTRIES - YANK - CIRCLE D - AND MORE!
COMP - FAST - PACESETTER - WISECO PISTONS - LUNATI - CALLIES - NEW TSP BRAND CRANK & RODS - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - ARH HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - PRECISION INDUSTRIES - YANK - CIRCLE D - AND MORE!
NEW NUMBER (512)863-0900
