anybody upgrade your exhaust valves?
10-27-2004, 12:03 PM
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anybody upgrade your exhaust valves?
I am rebuilding my engine and head now. The stem seals and valve guides (exhaust only) were smoked. So i am researching a exhaust valve replacement. The stock valve has a 28mm head and a gigantic flow restricting neck. So i am think a 29 to 30mm stainless valve with with a much more agreeable neck area. so far i have found no one with a drop in valve for this application (ferrea, manley, autotech, mondello...). anybody have a source or am i stuck with custom?
10-27-2004, 12:32 PM
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was rs2
<center><img src="http://pictureposter.audiworld.com/82531/111_1131.jpg"></center><p>
i just removed my rs2 exhaust manifold. I was running all the rs2 junk with a hybrid turbo and ned ritchies stage V software. the valves, valve guides and seals weren't destroyed but the guides and seals needed replacement. the valves and seats are in good shape, their just horribly restrictive. i'm building a stainless tubular exhaust manifold and 4" turbo back exhaust so removal any unnecessary restriction from the head is a must.
i just removed my rs2 exhaust manifold. I was running all the rs2 junk with a hybrid turbo and ned ritchies stage V software. the valves, valve guides and seals weren't destroyed but the guides and seals needed replacement. the valves and seats are in good shape, their just horribly restrictive. i'm building a stainless tubular exhaust manifold and 4" turbo back exhaust so removal any unnecessary restriction from the head is a must.
10-27-2004, 02:29 PM
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The Skinny
<center><img src="http://pictureposter.audiworld.com/82531/pieces_assembly_top.jpg"></center><p>
I have designed and fabricated an exhaust manifold with long equal length runners and a 5.5" long collector. the runner length from head flange to T3 flange is 33.5"+/-.2. the collector is 321 stainless and head flange and runners are all 304. runner are 16-gauge 1-5/8" OD. I just finished this manifold and a 4" turbo back exhaust system. Now i'm in the middle of the rebuilding the motor. I'm replacing the rods (pauter) and doing a bit of head work to increase its flow capabilities.
I have no performs data from this system yet. probably be the middle of november before i'm driving it. I have a manufacturing jig for the manifold. I have not built the jig for the exhaust yet, but that is easy. Don't have a cost yet either. But it ain't cheap. just the cost of materials for the manifold is as much as buying a some of the tubular manifolds that are out there. Once i get some miles on this system i'll go through the exercise of determine costs. Let me know if your interested.<ul><li><a href="http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=793046716 7&ssPageName=STRK:MESE:IT">control arms i'm selling on ebay</a></li></ul>
I have designed and fabricated an exhaust manifold with long equal length runners and a 5.5" long collector. the runner length from head flange to T3 flange is 33.5"+/-.2. the collector is 321 stainless and head flange and runners are all 304. runner are 16-gauge 1-5/8" OD. I just finished this manifold and a 4" turbo back exhaust system. Now i'm in the middle of the rebuilding the motor. I'm replacing the rods (pauter) and doing a bit of head work to increase its flow capabilities.
I have no performs data from this system yet. probably be the middle of november before i'm driving it. I have a manufacturing jig for the manifold. I have not built the jig for the exhaust yet, but that is easy. Don't have a cost yet either. But it ain't cheap. just the cost of materials for the manifold is as much as buying a some of the tubular manifolds that are out there. Once i get some miles on this system i'll go through the exercise of determine costs. Let me know if your interested.<ul><li><a href="http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=793046716 7&ssPageName=STRK:MESE:IT">control arms i'm selling on ebay</a></li></ul>
