Aftermarket cast head (AFR, TFS, etc.) that has iron/powdered metal valve guides?
01-15-2011, 10:34 AM
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Aftermarket cast head (AFR, TFS, etc.) that has iron/powdered metal valve guides? Hey guys, I'm looking to swap the PRC 220's I have on my 382 for something a little more aggressive. Long term durability is going to be a key factor for me, so I do not want something that has bronze valve guides, I would prefer something OE if possible. Do any of these manufacturers offer their heads with this as an option?
01-15-2011, 12:26 PM
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Hey guys, I'm looking to swap the PRC 220's I have on my 382 for something a little more aggressive. Long term durability is going to be a key factor for me, so I do not want something that has bronze valve guides, I would prefer something OE if possible. Do any of these manufacturers offer their heads with this as an option?
01-16-2011, 10:23 PM
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I actually have Yella Terra ultralites on my car already, I can run anything. I'm more interested in long term durability than anything else. Is powdered metal what GM uses in their heads from the factory?
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01-17-2011, 06:31 AM
#8
Do you know you have issues with the guides? When I set up my YT's the wipe pattern was 0.045" wide, which should help the longevity of the guides. My prior setup used Dart heads (bronze guides) and Crane rockers, which wipe very wide and there was some guide wear after less then 10K miles. That was the primary reason I went with the YT's on the new setup.
Last edited by vettenuts; 01-17-2011 at 04:44 PM.
01-17-2011, 10:40 AM
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Do you know you have issues with the guides? When I set up my YT's the wipe pattern was 0.045" wide, which should hell the longevity of the guides. My prior setup used Dart heads (bronze guides) and Crane rockers, which wipe very wide and there was some guide wear after less then 10K miles. That was the primary reason I went with the YT's on the new setup.
01-17-2011, 04:51 PM
#11
We offer powder metal guides in any of the PRC aftermarket castings too!
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
01-18-2011, 12:23 PM
#14
http://www.enginebuildermag.com/Arti...ditioning.aspx
As for the type of guide to install, many shops use the same type as the original and replace same with same (bronze with bronze, cast iron with cast iron, or powder metal with powder metal). Powder metal guides may be more expensive, so for some applications it may be more economical to substitute cast iron or bronze guides for the OEM powder metal guides. But these other materials may not provide the same longevity as powder metal.
Also this:
The idea of using a bronze valve guide is to help prevent galling to the stem of the valve as well as giving a better seal without making the valves sticky. Which can sometimes happen when we use some aftermarket valvetrains and high rev the living **** out of our motors.
As for the type of guide to install, many shops use the same type as the original and replace same with same (bronze with bronze, cast iron with cast iron, or powder metal with powder metal). Powder metal guides may be more expensive, so for some applications it may be more economical to substitute cast iron or bronze guides for the OEM powder metal guides. But these other materials may not provide the same longevity as powder metal.
Also this:
The idea of using a bronze valve guide is to help prevent galling to the stem of the valve as well as giving a better seal without making the valves sticky. Which can sometimes happen when we use some aftermarket valvetrains and high rev the living **** out of our motors.
Last edited by Viper; 01-18-2011 at 12:33 PM.
