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Registered
Join Date: Jul 2004
Location: Minnesota
Posts: 330
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Which valve guides should I buy?
Pelican sells a couple of different valve guides and I'm curious if it makes difference. Bronze and Phosphorus bronze.
Also curious what the oversized ones are for? Figured since the motor is apart and the valves seem to have a very slight wobble to them I'd replace them all. Brian
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1987 911 Coupe-Current ride 2007 997TT-Sold 2006 997 C2S-Sold 1991 964 Turbo-Sold 1987 911 Targa-You never forget your first |
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09-27-2006, 07:41 PM
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3.4 Bigger is better
Join Date: Nov 2003
Location: South Dakota
Posts: 1,497
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Were the heads done when the other engine work was done? I would consider sending the heads out to get the work done, I would not trust anyone who hasn't done them before. And I believe that Manganese bronze are what were put in the heads.
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Michael 88 911 Diamond Blue CE Carrera 3.4 HC3.4 member 2020 Honda Passport Last edited by 88-diamondblue; 09-29-2006 at 09:46 PM.. |
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09-27-2006, 08:01 PM
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3.4 Bigger is better
Join Date: Nov 2003
Location: South Dakota
Posts: 1,497
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Brian,
These are the heads after they came back from Supertec.  
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Michael 88 911 Diamond Blue CE Carrera 3.4 HC3.4 member 2020 Honda Passport Last edited by 88-diamondblue; 09-29-2006 at 02:45 PM.. |
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09-27-2006, 08:13 PM
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Registered
Join Date: Jul 2004
Location: Minnesota
Posts: 330
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Whats' the cost of having this done?
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1987 911 Coupe-Current ride 2007 997TT-Sold 2006 997 C2S-Sold 1991 964 Turbo-Sold 1987 911 Targa-You never forget your first |
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09-28-2006, 05:31 AM
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Try not, Do or Do not
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Manganese bronze offers much better wear characteristics and the phosphorous bronze offers superior cooling.
In turbo and race heads (anything making high exhaust temperatures) we use the PB guides for the exhaust valve. On most street engines we use MB exclusively. BTW: the exhaust valves guides generally get a slightly larger clearance to allow for better oiling. High performance turbos generally run without valve stem seal . This promotes cooling and reduces wear. Yes oil consumption can go up.
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Henry Schmidt SUPERTEC PERFORMANCE Ph: 760-728-3062 Email: supertec1@earthlink.net |
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09-28-2006, 06:58 AM
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Registered
Join Date: Mar 2002
Posts: 3,563
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Interesting. Protomotive recommended AliSiBr valve guides for my blown Carrera motor. They said they are very durable and are excellent for high power turbo motors
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition 
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10-05-2006, 09:20 PM
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Porsche
Retor 911
Scarab
Riley
