[Z06] Maybe The PRC Heads Are NOT The Answer To Guide Wear
10-03-2013, 02:06 PM
#21
Team Owner
10-03-2013, 02:06 PM
#22
10-03-2013, 02:09 PM
#23
Team Owner
I was wondering the same thing. Mine are at 1.5 turns. 6k miles, no noises, nothing strange here so far in my PRC285ccs. Ti valves, .650 PRC dual springs.
If I ever have to swap heads I would probably just throw some TF 255 heads on it and swap to ls3 rockers/intake.
If I ever have to swap heads I would probably just throw some TF 255 heads on it and swap to ls3 rockers/intake.
10-03-2013, 02:28 PM
#25
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St. Jude Donor '08
Even at 1.5-2.0 turns, I can't see that changing the valvetrain geometry and causing .016" of guide wear in 7,000 miles
Our Katech 427 with WCCH heads is setup at 1.5 and after 3 years of solid abuse and racing there are no issues.
10-03-2013, 02:30 PM
#26
Pro
The OP used stainless intake valves also? What was the reasoning behind that? I thought the common practice was to use OEM intake valves or new titanium valves. Just curious. Sorry if its a noob question. They should back up their heads. Many of us have their products....myself included.
10-03-2013, 02:31 PM
#27
Team Owner
The OP used stainless intake valves also? What was the reasoning behind that? I thought the common practice was to use OEM intake valves or new titanium valves. Just curious. Sorry if its a noob question. They should back up their heads. Many of us have their products....myself included.
10-03-2013, 02:33 PM
#28
Pro
Looking at his car I did not think $600 would be the reason. I was wondering from an engineering perspective if he felt there was a benefit to them vs OEM/Titanium. In my case i reused my intake valves for weight savings.
Sucks.
Sucks.
Last edited by Svre46; 10-03-2013 at 02:35 PM.
10-03-2013, 02:41 PM
#30
Team Owner
I also question why he went with the heavier SS intakes. I went with their Ti intakes. Sure hope I didn't make mistake when I decided to go with the PRC265's.
10-03-2013, 02:43 PM
#31
Burning Brakes
10-03-2013, 02:45 PM
#32
Melting Slicks
10-03-2013, 02:45 PM
#33
The OP used stainless intake valves also? What was the reasoning behind that? I thought the common practice was to use OEM intake valves or new titanium valves. Just curious. Sorry if its a noob question. They should back up their heads. Many of us have their products....myself included.
So they came with new intake and exhaust valves.
Your heads have SS valves and bronze guides, right?
10-03-2013, 02:49 PM
#36
Team Owner
I decided I will have my car inspected each year at my speed shop. My first inspection will be in April of 2014 (1 year mod anniversary and snow melts). I will keep everyone posted here of course.
10-03-2013, 02:53 PM
#37
Interesting that the exhaust is within spec but the intake is so far out of wack.
I'm curious to know what is the weight of the SS intake valves is compared to the Ti? The delta from OEM for intakes should be much higher than the smaller exhausts.
I'm curious to know what is the weight of the SS intake valves is compared to the Ti? The delta from OEM for intakes should be much higher than the smaller exhausts.
10-03-2013, 02:53 PM
#38
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St. Jude Donor '08
No, this is a show/street car. I doubt that Andy has ever approached 7k RPM. Half of the miles on the car since the heads were installed was a 3,500 miles road trip last month with other members of his Corvette club.
Yes, I have bronze guides and stainless exhaust valves, but we are looking at the intake wear in this example. I have stock intake valves and Andy has the stainless valves in this particular set.
Yes, I have bronze guides and stainless exhaust valves, but we are looking at the intake wear in this example. I have stock intake valves and Andy has the stainless valves in this particular set.
10-03-2013, 02:55 PM
#39
Pro
Basically I am questioning the use of stainless intake valves vs. the "fix" of just using stainless exhaust valves. Since his intake guides were so out of wack was the valve behind it? I’ll stay subscribed and hopefully someone will get to the bottom of it though I doubt it. Seems like we are just going in an endless circle.
