Anyone using Big Chiefs?
08-02-2009 | 12:05 AM
#42
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From: Socialist Republic of Washington State
08-02-2009 | 03:10 PM
#43
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From: Little River SC
Yes, only Ti on 12 degree heads like profiler, copper-berylium seats are the way to go, better heat transfer and corroision protection on the exhaust, have you ever tried cutting in a valve seat on alloy, it's very hard material. 20-25 $ per seat plus machining, most people don't understand the difference between the two. If you need to know the exact alloy makeup between intake and exhaust, I would have to look it up on the spec sheet.
08-02-2009 | 06:19 PM
#44
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From: Socialist Republic of Washington State
Yes, only Ti on 12 degree heads like profiler, copper-berylium seats are the way to go, better heat transfer and corroision protection on the exhaust, have you ever tried cutting in a valve seat on alloy, it's very hard material. 20-25 $ per seat plus machining, most people don't understand the difference between the two. If you need to know the exact alloy makeup between intake and exhaust, I would have to look it up on the spec sheet.
If you have the time, it would be great, who is your source on valves and seats? What do you use when they aren't 12 degree heads?
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08-03-2009 | 07:59 AM
#45
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From: Frankfort,ill
Send them to Jimmy V
08-03-2009 | 09:46 PM
#46
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From: Little River SC
Ferrea valves or if going custom Victory Valves for Ti, it wasn't cost effective for Victory, to do inconel and stainless in the the past.
08-03-2009 | 09:54 PM
#47
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From: Little River SC
Good to see someone out there knows quality; Percision Products, in Arden, NC.
08-05-2009 | 01:00 AM
#48
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From: Socialist Republic of Washington State
BTW with the help on both threads (2 sites)
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Last edited by 2112; 08-05-2009 at 01:02 AM.
08-20-2009 | 08:38 AM
#49
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From: Frankfort,ill
Chuck at :Percision Products is great to deal with drink:
08-20-2009 | 09:42 AM
#50
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From: Cape Coral, FL
Ran Del West intake and exhaust titanium's in some 14 deg's with 9.5:1. Ended up having problems on exhaust side and Del West said that with a compression ratio of only 9.5:1 I needed to get them out and go with a different valve as they do not like low compression ratio's. Higher compression no problem as apparently the exhaust runs cooler? Intake were fine.
