The Ford Barn

trainguy · 06-09-2013, 01:41 PM

The carb on my 51 the original type designed with the vaccuum port for the loadamatic dist.I blocked off the port because I am running a Bubbas chevy conversion which needs vaccuum from below the throttle plates.I feel the car should run better than it does and wonder if there is a better carb choice.Thanks Phil

alan · 06-09-2013, 03:04 PM

find a 4 bolt Mercury intake, install and then run a Rochester 2G

Henry/Kokomo · 06-09-2013, 03:52 PM

Alan X 2.

Walt Dupont--Me. · 06-09-2013, 04:34 PM

The 2GC works fine, specialy with a bigger engine like a 276 but your stock 239 should run good with the stock Holley. Walt

Ol' Ron · 06-09-2013, 05:56 PM

You might want to check the timing curve. Bubbas distributors are adjustable in both Mechanical and vacuum. Another old timers trick is to being the engine up to a fast idle and slowly bring you hand over the carb. If the engine begins to speed up you're lean. If it stalls out Rich and if it just slows down OK.. An AF meter is more accurate.

trainguy · 06-09-2013, 06:03 PM

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Quote:

Originally Posted by Ol' Ron

You might want to check the timing curve. Bubbas distributors are adjustable in both Mechanical and vacuum. Another old timers trick is to being the engine up to a fast idle and slowly bring you hand over the carb. If the engine begins to speed up you're lean. If it stalls out Rich and if it just slows down OK.. An AF meter is more accurate.

How would I go about checking the timing curve?

alan · 06-09-2013, 06:53 PM

I am running a 2gc rochester from a 66 v6 jeep and played around with the jets to get it running good, I too am running a chev dizzy from Bubba but with no vacuum advance-I wonder if I should change out to an adjustable vacuum advance. The engine is a 51 merc with a 77b Isky cam, currently running a 3:25 gears in a 9" ford, not really good for around town on hills but great running down the road!!

Charlie ny · 06-09-2013, 07:07 PM

Phil,
Try setting the initial at 4 degrees....this is with the vac hose off the dist
and the source of vac plugged. I'm talking shade tree stuff here.....crack the throttle
while the timing light is seeing the mark on the pulley and the pointer...you should see
the mark jump about an inch. The throttle cracking thing should be enough to get you
to 2500 rpm. This is a rough and dirty way to determine that things are functioning.
If Bubba set it...it's right.
A properly set up 94 is all you'll ever need.
A bolt on alternative would be a Stromberg 48 which Uncle Max can fast
freight to you. The Stromberg carb eliminates the sometimes erasable vac power
valve and is tuner friendly.
Charlie ny

Merc Cruzer · 07-07-2023, 07:55 PM

Quote:

Originally Posted by Ol' Ron

You might want to check the timing curve. Bubbas distributors are adjustable in both Mechanical and vacuum. Another old timers trick is to being the engine up to a fast idle and slowly bring you hand over the carb. If the engine begins to speed up you're lean. If it stalls out Rich and if it just slows down OK.. An AF meter is more accurate.

Thanks Ol' Ron, I will give that a try on mine.

scicala · 07-08-2023, 11:18 AM

Holley 94 carbs can be fairly easily modified for ported manifold vacuum to the distributor, using the same port on the backside of the carb.
Saves a lot of time and money.

Sal

cadillac512 · 07-08-2023, 01:42 PM

Quote:

Originally Posted by scicala

Holley 94 carbs can be fairly easily modified for ported manifold vacuum to the distributor, using the same port on the backside of the carb.
Saves a lot of time and money.

Sal

Now THAT is valuable information!

Terry

Ol' Ron · 07-08-2023, 02:15 PM

The Holey 94 cannot operate any load a matic distributor. The 94 used on the 8ba engines has a different vacuum sysem for this distributor. However any carb can run the converted SBC distributor as this is NOT ported vacuum, also do not use this port for the chevy distributor as this won't work either Hope yoy understand this. maybe soneone else can explain it better.
The old fart!!!

06-09-2013, 01:41 PM	#1
trainguy Senior Member Join Date: May 2010 Location: Lehighton Pa Posts: 1,085	51 ford carb. The carb on my 51 the original type designed with the vaccuum port for the loadamatic dist.I blocked off the port because I am running a Bubbas chevy conversion which needs vaccuum from below the throttle plates.I feel the car should run better than it does and wonder if there is a better carb choice.Thanks Phil

06-09-2013, 03:04 PM	#2
alan Senior Member Join Date: Jul 2010 Location: UPSTATESC Posts: 669	Re: 51 ford carb. find a 4 bolt Mercury intake, install and then run a Rochester 2G

06-09-2013, 03:52 PM	#3
Henry/Kokomo Senior Member Join Date: May 2010 Location: Kokomo, Indiana Posts: 1,731	Re: 51 ford carb. Alan X 2. __________________ Henry

06-09-2013, 04:34 PM	#4
Walt Dupont--Me. Senior Member Join Date: May 2010 Location: Gardiner Me. Posts: 4,200	Re: 51 ford carb. The 2GC works fine, specialy with a bigger engine like a 276 but your stock 239 should run good with the stock Holley. Walt

06-09-2013, 05:56 PM	#5
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,862	Re: 51 ford carb. You might want to check the timing curve. Bubbas distributors are adjustable in both Mechanical and vacuum. Another old timers trick is to being the engine up to a fast idle and slowly bring you hand over the carb. If the engine begins to speed up you're lean. If it stalls out Rich and if it just slows down OK.. An AF meter is more accurate.

06-09-2013, 06:53 PM	#7
alan Senior Member Join Date: Jul 2010 Location: UPSTATESC Posts: 669	Re: 51 ford carb. I am running a 2gc rochester from a 66 v6 jeep and played around with the jets to get it running good, I too am running a chev dizzy from Bubba but with no vacuum advance-I wonder if I should change out to an adjustable vacuum advance. The engine is a 51 merc with a 77b Isky cam, currently running a 3:25 gears in a 9" ford, not really good for around town on hills but great running down the road!!

06-09-2013, 07:07 PM	#8
Charlie ny BANNED Join Date: May 2010 Posts: 3,019	Re: 51 ford carb. Phil, Try setting the initial at 4 degrees....this is with the vac hose off the dist and the source of vac plugged. I'm talking shade tree stuff here.....crack the throttle while the timing light is seeing the mark on the pulley and the pointer...you should see the mark jump about an inch. The throttle cracking thing should be enough to get you to 2500 rpm. This is a rough and dirty way to determine that things are functioning. If Bubba set it...it's right. A properly set up 94 is all you'll ever need. A bolt on alternative would be a Stromberg 48 which Uncle Max can fast freight to you. The Stromberg carb eliminates the sometimes erasable vac power valve and is tuner friendly. Charlie ny

07-08-2023, 11:18 AM	#10
scicala Senior Member Join Date: Jun 2010 Location: Detroit suburb, MI Posts: 3,706	Re: 51 ford carb. Holley 94 carbs can be fairly easily modified for ported manifold vacuum to the distributor, using the same port on the backside of the carb. Saves a lot of time and money. Sal

07-08-2023, 02:15 PM	#12
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,862	Re: 51 ford carb. The Holey 94 cannot operate any load a matic distributor. The 94 used on the 8ba engines has a different vacuum sysem for this distributor. However any carb can run the converted SBC distributor as this is NOT ported vacuum, also do not use this port for the chevy distributor as this won't work either Hope yoy understand this. maybe soneone else can explain it better. The old fart!!!