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#1
05-21-2025, 11:33 PM
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Power valve recommendations.
I have a 3878261-EH 3310. Without success I have been trying to find out what primary and secondary power valves were in installed from the factory. The internet has been no help as the numbers are all over the place. Hope I can get some direction from the folks here. Craig
__________________
You've never lived until you've almost died -- for those who fight for it, life has a flavor the protected will never know! 
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#2
05-22-2025, 08:59 AM
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It looks like it is a 6.5 valve Craig..........
https://documents.holley.com/techlib...al_listing.pdf
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| The Following User Says Thank You to napa68 For This Useful Post: | ||
dykstra (05-22-2025) | ||
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#3
05-22-2025, 11:54 AM
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That listing is where I have an issue. The carb I have is and early 4150 with two PVs and it indicates *(12-13)* which does not appear at the end of the chart. The listing on that chart is a single PV for a 4160 carb. UGH! Thanks for the response!
__________________
You've never lived until you've almost died -- for those who fight for it, life has a flavor the protected will never know!
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#4
05-22-2025, 12:49 PM
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Do you know the vacuum at idle the engine produces. That will guide you as to # PV needed. I think Tim's 6.5 # will work fine. Call our sponsor Custom Carbs Tom or Phil can help you.
https://customrebuiltcarburetors.com/
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Steve Shauger The Supercar Registry www.yenko.net Vintage Certification™ , Providing Recognition to Unrestored Muscle Cars. Website: www.vintagecertification.com
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earntaz (05-22-2025) | ||
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#5
05-22-2025, 01:44 PM
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I agree with Steve that Phil will be able to help you out. I have included Phil's contact information and a Holley Specification Chart.
__________________
1966 Corvette Coupe L79 Mossport Green 1969 Camaro Z/28 Hugger Orange NCRS #22211
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earntaz (05-22-2025) | ||
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