[C2] What size power valve is this? 8.5 or 6.5? Pic.
Thread Starter
Drifting
Joined: Jun 2006
Posts: 1,595
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From: Durham ON
What size power valve is this? 8.5 or 6.5? Pic.
Dave
Last edited by DSR; Nov 26, 2016 at 11:26 AM.
Safety Car
Joined: Oct 2001
Posts: 3,599
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From: Coldwater MI
I think the numbers are stacked (6 over 5) like shown halfway down this page: http://www.crankshaftcoalition.com/w...ve_carburetors
Melting Slicks
Joined: Apr 2005
Posts: 2,777
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That is a 8.5 Power Valve.
8.5 valve with your engine w 11" of vacuum at idle sounds right.
8.5 makes more sense for your engine. AKA the 2" rule for selecting power valves.
8.5 valve with your engine w 11" of vacuum at idle sounds right.
8.5 makes more sense for your engine. AKA the 2" rule for selecting power valves.
Last edited by babbah; Nov 26, 2016 at 12:08 PM.
Thread Starter
Drifting
Joined: Jun 2006
Posts: 1,595
Likes: 180
From: Durham ON
Okay I got it figured out. My logbook has two numbers in it. 11" vac. at idle and 8 to 12" vac. at 650 rpm. The second one makes more sense for the 6.5 power valve. I will have to recheck vacuum at idle once the motor goes back together.
Thanks for the help. Dave
Thanks for the help. Dave
Team Owner
Joined: Aug 2007
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Army
https://www.corvetteforum.com/forums...post1593043695
