The Ford Barn

rcranger · 07-06-2015, 06:06 PM

have a eab motor in my T ,carb is running way to rich what is the best kit and how do i figure which power vale to use ,wrote to couple guys on here who know these questions but never recieved any answers, getting ready for a trip and want to get my mpg up from 18 to in the 20's

JSeery · 07-06-2015, 06:32 PM

A kit will help you with a rebuild if there is a carb problem, but won't help an improper jetting issue. Do you know what jets are in it? Or to high fuel pressure or improper float setting, etc.

rcranger · 07-06-2015, 09:26 PM

fuel pressure is at 2lbs will chack the jets and float

lonewolf · 07-06-2015, 10:08 PM

You have to lower your power valve if you have a cam. The longer the duration the lower you go. If it's a stock motor use a stock power valve

flatheadmurre · 07-06-2015, 10:51 PM

Measure the intake vacum half of that is a start for choosing size of powervalve.

rcranger · 07-07-2015, 12:53 AM

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Will put gauge on it tommorow ,I am guessing vacuum at idle then half of what I have?as a start point

tubman · 07-07-2015, 01:43 AM

To answer your question, the best kits come from Daytona Parts. You can't order on-line from them; you need to call them and talk to them so they can make sure you get the right kit.

I have done a few 94's over the last few years, and most of the problems I found concerned ill-fitting or improper power valves. The later model ones for Holley 4-bbls will screw into the carb body, but will leak and cause all kinds of problems. I even ran into a case where a power valve was too high and pressed against the carb base and wouldn't work at all.

Mart · 07-07-2015, 06:58 AM

An often overlooked cause of rich running is the flatness of the base and body. If they are not properly flat, you can get an air leak into the power valve chamber, which can lower the vacuum in the chamber and cause the power valve to be supplying extra fuel all the time. Lapping the lower face of the body and the upper face of the base will get them flat. Mine were miles off and the carbs became much more tuneable since I did get them flat.

Mart.

green50 · 07-07-2015, 07:01 AM

For proper fitting power valves try CarQuest. I believe part number FM728G is the 5.5 and it comes with a gasket. Just picked one up yesterday.

Ol' Ron · 07-07-2015, 07:23 AM

18MPG is pretty good for a flathead. Fuel economy depends allot on the driver as well as the carb. You need to install an AF meter and take it for a drive. Also the ignition system must be able to advance the timing during cruise to be able to burn a lean mixture when the PV is closed.
But at 18 mpg I think it's very close right now.

07-06-2015, 06:06 PM	#1
rcranger Member Join Date: Aug 2010 Posts: 70	holley 94 question have a eab motor in my T ,carb is running way to rich what is the best kit and how do i figure which power vale to use ,wrote to couple guys on here who know these questions but never recieved any answers, getting ready for a trip and want to get my mpg up from 18 to in the 20's

07-06-2015, 06:32 PM	#2
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: holley 94 question A kit will help you with a rebuild if there is a carb problem, but won't help an improper jetting issue. Do you know what jets are in it? Or to high fuel pressure or improper float setting, etc.

07-06-2015, 09:26 PM	#3
rcranger Member Join Date: Aug 2010 Posts: 70	Re: holley 94 question fuel pressure is at 2lbs will chack the jets and float

07-06-2015, 10:08 PM	#4
lonewolf Senior Member Join Date: May 2010 Location: Michigan Posts: 464	Re: holley 94 question You have to lower your power valve if you have a cam. The longer the duration the lower you go. If it's a stock motor use a stock power valve

07-06-2015, 10:51 PM	#5
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: holley 94 question Measure the intake vacum half of that is a start for choosing size of powervalve.

07-07-2015, 12:53 AM	#6
rcranger Member Join Date: Aug 2010 Posts: 70	Re: holley 94 question Sponsored Links (Register now to hide all advertisements) Will put gauge on it tommorow ,I am guessing vacuum at idle then half of what I have?as a start point

07-07-2015, 01:43 AM	#7
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,303	Re: holley 94 question To answer your question, the best kits come from Daytona Parts. You can't order on-line from them; you need to call them and talk to them so they can make sure you get the right kit. I have done a few 94's over the last few years, and most of the problems I found concerned ill-fitting or improper power valves. The later model ones for Holley 4-bbls will screw into the carb body, but will leak and cause all kinds of problems. I even ran into a case where a power valve was too high and pressed against the carb base and wouldn't work at all.

07-07-2015, 06:58 AM	#8
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,744	Re: holley 94 question An often overlooked cause of rich running is the flatness of the base and body. If they are not properly flat, you can get an air leak into the power valve chamber, which can lower the vacuum in the chamber and cause the power valve to be supplying extra fuel all the time. Lapping the lower face of the body and the upper face of the base will get them flat. Mine were miles off and the carbs became much more tuneable since I did get them flat. Mart.

07-07-2015, 07:01 AM	#9
green50 Senior Member Join Date: Dec 2013 Location: North Georgia Posts: 392	Re: holley 94 question For proper fitting power valves try CarQuest. I believe part number FM728G is the 5.5 and it comes with a gasket. Just picked one up yesterday. __________________ Gene

07-07-2015, 07:23 AM	#10
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,855	Re: holley 94 question 18MPG is pretty good for a flathead. Fuel economy depends allot on the driver as well as the carb. You need to install an AF meter and take it for a drive. Also the ignition system must be able to advance the timing during cruise to be able to burn a lean mixture when the PV is closed. But at 18 mpg I think it's very close right now.