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EFV-8 Club Forum / General Ford Discussion / 94 Power valves

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Discussion Topic: 94 Power valves

ccnelson

08-06-2012 @ 7:50 PM

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I installed two Daytona carb kits today One in my 47 coupe and all went well. Car idled and ran good. Went to install kit in my 51 and noticed the daphram in the power vale was badly wrinkled. Intalled the power valve and assembled the base to the carb. Applied vacum to the base with a Mytivac up to 15". Lost all vacum in 15 seconds. Tryed again with one from Macs. Same results. Am I correct in assuming that vacum should have stayed at 15" and I have two bad power valves or am I missing something. Thanks for you input.

ford38v8

08-06-2012 @ 8:13 PM

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Simple and quick test for a power valve: Suck on it. It should hold vacuum against your tongue.

Alan

supereal

08-07-2012 @ 7:03 AM

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There have been reports of problems with power valves with rounded bases, particularly when used with the typical triangular gaskets. These allow loss of vacuum intended to pull the valve when fuel demand is high. Many older kits in stock don't have alcohol proof diaphragms, and many vendorscan't tell you if they do. The valves with the rounded base can be machined for a better fit.

TomO

08-07-2012 @ 7:38 AM

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The vacuum leak could be in the gasket of the base to to the carb body, power valve gasket or in your connection to the base. It is difficult to check for vacuum leaks with the carburetor off of the car.

Alan's test will help determine if the diaphragm is bad, letting the carburetor sit for a couple of days with gas in it will let you know if the power valve gasket is leaking and a vacuum gauge will check out the body to base gasket.

Tom

ccnelson

08-09-2012 @ 5:23 AM

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Thanks Tom Alan & Supereal for your tips. Installed a flat base valve in carb and it is on the bench checking for fuel leaks. One thing I noticed when checking with the Mityvac that the round base (Holley) valves would open when vacum was 8" and flat base(Ford)would open when vacum was down to 5-7". THANKS again guys.

Craig

Grant

08-12-2012 @ 5:47 AM

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Hi Craig. Thanks for posting this item.

How did your 1951 carburetor turn out? Are you satisfied with the Daytona kit ? From which retailer did you purchase it ? Do you know of a store in Michigan which sells them ?

Our '51 has been driven less than a thousand miles since 2007 when we bought it, and I want to rebuild the carb to be ethanol-resistant.

JT Ford

08-12-2012 @ 7:35 AM

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You can order direct from Daytona Parts Co.
Got to web site and get their phone number and
call in the order. I ordered the correct power
valves and leather pump for my 8BA carb. Arrived
in 3 days. Great people..............

ccnelson

08-12-2012 @ 6:09 PM

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Grant

The carb turned well on my 51. I've put about 100 miles on it since installing the kit.

I ordered it directly from Daytona Parts Co. (386) 427 7108. As JT mentioned, they are great to deal with.

Craig

Grant

08-16-2012 @ 7:40 AM

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Thanks very much.

I spoke to A.J. at Daytona yesterday. He is sending me two ethanol-resistant carburetor rebuild kits for $42.00 each plus $14.00 shipping.

ken ct.

08-16-2012 @ 8:28 AM

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I have good quality PV and the correct gasket for them in stock @ $16 plus shipping USA made. ken ct.

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