The Ford Barn

slowforty · 12-17-2021, 10:52 PM

What is the point of blocking off the power valve on a Holley 94?

flatjack9 · 12-17-2021, 11:12 PM

There is none.

ford38v8 · 12-18-2021, 12:03 AM

Quote:

Originally Posted by slowforty

What is the point of blocking off the power valve on a Holley 94?

When running multiple carbs, one power valve is sufficient.

flatjack9 · 12-18-2021, 11:07 AM

I still run all 3. Makes for a more even fuel distribution to all cylinders.

slowforty · 12-18-2021, 12:01 PM

Ok a fellow I know blocked off both carbs. I thought there might have some benefit.

chap52 · 12-19-2021, 07:13 AM

Sponsored Links (Register now to hide all advertisements)

Charly NY advised me on a dual carb set-up to block one PV off. At that time (years ago) he had the correct plugs for that. Chap

JWL · 12-19-2021, 08:29 AM

Except for systems specified mostly for competition, power valves should be used. Blocked power valve carbs provide proper A/F ratio only at wide open throttle.

Charlie ny · 12-19-2021, 09:50 AM

I build 2x2's with and without PV's. Technically I agree PV's are there for upper end
enrichment. With 3x2's my setups have a PV in the center carb. Much of my multi carb work goes thousands of miles away and must be reliable. In reality these cars are street driven between
30 and 70 mph. Another challenge is the true condition of the motors my setups will be going on. My bottom line is a happy customer and I have found that what works best all around for 2x2's is to run 52 jets with blocked PV's. Slightly rich on the low end and slightly lean up high.

I explain these points to prospective customers and we have an understanding.
There are quite a few here that are running my multi carb setups and some input
from them I certainly encourage. I overwhelmingly respect all opinions on this.

Charlie ny

12-17-2021, 10:52 PM	#1
slowforty Senior Member Join Date: May 2010 Location: Tinley Park Ill Posts: 1,060	holley 94 What is the point of blocking off the power valve on a Holley 94?

12-17-2021, 11:12 PM	#2
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,526	Re: holley 94 There is none.

12-18-2021, 11:07 AM	#4
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,526	Re: holley 94 I still run all 3. Makes for a more even fuel distribution to all cylinders.

12-18-2021, 12:01 PM	#5
slowforty Senior Member Join Date: May 2010 Location: Tinley Park Ill Posts: 1,060	Re: holley 94 Ok a fellow I know blocked off both carbs. I thought there might have some benefit.

12-19-2021, 07:13 AM	#6
chap52 Senior Member Join Date: Jun 2013 Location: Marana Arizona Posts: 1,776	Re: holley 94 Sponsored Links (Register now to hide all advertisements) Charly NY advised me on a dual carb set-up to block one PV off. At that time (years ago) he had the correct plugs for that. Chap

12-19-2021, 08:29 AM	#7
JWL Member Emeritus Join Date: May 2010 Location: Fitzgerald, Georgia Posts: 2,204	Re: holley 94 Except for systems specified mostly for competition, power valves should be used. Blocked power valve carbs provide proper A/F ratio only at wide open throttle.

12-19-2021, 09:50 AM	#8
Charlie ny BANNED Join Date: May 2010 Posts: 3,019	Re: holley 94 I build 2x2's with and without PV's. Technically I agree PV's are there for upper end enrichment. With 3x2's my setups have a PV in the center carb. Much of my multi carb work goes thousands of miles away and must be reliable. In reality these cars are street driven between 30 and 70 mph. Another challenge is the true condition of the motors my setups will be going on. My bottom line is a happy customer and I have found that what works best all around for 2x2's is to run 52 jets with blocked PV's. Slightly rich on the low end and slightly lean up high. I explain these points to prospective customers and we have an understanding. There are quite a few here that are running my multi carb setups and some input from them I certainly encourage. I overwhelmingly respect all opinions on this. Charlie ny