The Ford Barn

Phil Gillespie · 12-18-2013, 02:10 PM

Seeking confirmation on the following:

8RT Flathead fitted with single carb 8BA Holley 94.
The gasket between inlet manifold and carb bottom.
Should it have the small hole at fron end of gasket?
Or should it be without this hole? & Why?

Appreciate all advice.
Phil
NZ

ford38v8 · 12-18-2013, 03:16 PM

No hole. That's for the heat riser manifold for the Stromberg carburetor. You don't want or need heat on the bottom of the Ford/Holley 94 carburetor.

Ross F-1 · 12-18-2013, 03:30 PM

There's no hole in the manifold, so there's no heat coming thru the hole. It does no harm.

ken ct · 12-18-2013, 04:10 PM

They need that small hole to get vacume from both barrels to the PV. All 94 gaskets from 56 down to late 38 have this hole. Stromberg gasket has no hole there. ken ct. That hole is for vacume NOT heat.

Ross F-1 · 12-18-2013, 06:40 PM

The vacuum supply to the economizer valve is in the base of the carb on 8BA/8RT's. The hole in the gasket does nothing, but doesn't do any harm.

ken ct · 12-18-2013, 07:31 PM

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Ross I beg to differ with you that passage comes out right under the PV which is where PV gets vac. to operate. The vac. passage on the rear of the base is for automatic trans carbs its a spark valve. ken ct.

Phil Gillespie · 12-18-2013, 11:38 PM

Quote:

Originally Posted by ken ct

Ross I beg to differ with you that passage comes out right under the PV which is where PV gets vac. to operate. The vac. passage on the rear of the base is for automatic trans carbs its a spark valve. ken ct.

So Ken to get the vaccum supply to the PV valve on this carb I should fit a gesket with the hole in it?

Thanks,
Phil

Ross F-1 · 12-18-2013, 11:40 PM

Is there a hole in your manifold under the hole in the gasket?

ken ct · 12-19-2013, 01:13 AM

If their is a hole in the manifold you have a 35-36 intake on there.Why do you think ALL 94 carb gaskets have that hole there.ALL Stromberg gaskets have no hole. ken ct.

ford38v8 · 12-19-2013, 01:46 AM

Ken, you went and done it again! I'm confused and befuddled. Time for bed.

ken ct · 12-19-2013, 07:29 AM

Well I try and keep you guys on the straight and narrow. I tell it like it is. That extra hole only appears on some of the 35-36 manifolds [not all] why I don't know.Which is for heat to the Strom. base also which DOES NOT have a hole there like the 94 carb.Their PV are mechanicly operated. That's why PV's blow or burn out when you get a backfire through the carb with 94's. ken ct. Sorry if you are confused.

34PKUP · 12-19-2013, 08:09 AM

Quote:

Originally Posted by ken ct

If their is a hole in the manifold you have a 35-36 intake on there.Why do you think ALL 94 carb gaskets have that hole there.ALL Stromberg gaskets have no hole. ken ct.

Quote:

Originally Posted by ken ct

Well I try and keep you guys on the straight and narrow. I tell it like it is. That extra hole only appears on some of the 35-36 manifolds [not all] why I don't know.Which is for heat to the Strom. base also which DOES NOT have a hole there like the 94 carb.Their PV are mechanicly operated. That's why PV's blow or burn out when you get a backfire through the carb with 94's. ken ct. Sorry if you are confused.

Sorry but I am confused also (and that's not hard to do) but this takes the cake. Why are you bringing up 35-36 manifolds when the original question posed pertained to an 8RT ?

Walt Dupont--Me. · 12-19-2013, 08:52 AM

I usually don't stick my nose into these stupid threads but the poor guy just asked a simple question. Most of those gaskets have that little hole, I don't know what it's there for but it don't do anything. There no exh there on those 8BA in takes. The PV gets it vacuum from a slot on the bottom carb. Someone has posted a pic. SO, don't worry about that little hole when using the late intake. Walt

1952henry · 12-19-2013, 09:24 AM

Quote:

Originally Posted by 34PKUP

Sorry but I am confused also (and that's not hard to do) but this takes the cake. Why are you bringing up 35-36 manifolds when the original question posed pertained to an 8RT ?

I'll do you one better. Why did he bring up the spark control valve hole in the REAR of the carb when the focus and pictures pertained to the BOTTOM of the carburetor

ken ct · 12-19-2013, 09:43 AM

First of all Ross asked if he had a hole there in his manifold which only appears on some 35-36 manifolds.He could have had a wrong intake on it. ken ct.

Phil Gillespie · 12-19-2013, 07:14 PM

Thanks for all advice and assistance.
My inlet manifold does not have the hole in it. 8BA inlett manifold
So just fitted a gasket with this hole in the front.As have plenty of these ones.
Found my high pitched squeal which as air bein sucked in at joint above.

Again thanks.
Phil
NZ

Ross F-1 · 12-19-2013, 07:20 PM

I wonder if your power valve (economizer valve) is too tall, and is holding the throttle section off the bowl section? Some kits come with a PV that will do that.

Walt Dupont--Me. · 12-19-2013, 07:36 PM

Quote:

Originally Posted by Phil Gillespie

Thanks for all advice and assistance.
My inlet manifold does not have the hole in it. 8BA inlett manifold
So just fitted a gasket with this hole in the front.As have plenty of these ones.
Found my high pitched squeal which as air bein sucked in at joint above.

Again thanks.
Phil
NZ

Take the throttle body off the float bowl. I think you'll find the gasket is sucked in where your getting your squeal. If it's sucked in usually the bottom of the float bowl is warped. Charlie machines those bottoms. For quick fix you might file where those 2 out side holes are. There usually bent down by over tightening those screws. Walt

ken ct · 12-19-2013, 07:37 PM

I have shorter PV's in the correct # 5.5 that fit and work very well. Either that or your base to middle section gasket has a break in it some where. ken ct.

ken ct · 12-19-2013, 07:42 PM

He could also have the wrong gasket in there, the bigger venturies use a gasket with bigger holes in it and it wont work with the smaller venturies. Some kits come with both sizes of gaskets. The wrong one could have been used on a rebuild. ken ct. Ive seen it happen by DIYS rebuilders that don't know any better.

12-18-2013, 02:10 PM	#1
Phil Gillespie Senior Member Join Date: Sep 2011 Location: Christchurch New Zealand Posts: 1,640	8ba Holley 94 Carb gasket to inlet manifold Seeking confirmation on the following: 8RT Flathead fitted with single carb 8BA Holley 94. The gasket between inlet manifold and carb bottom. Should it have the small hole at fron end of gasket? Or should it be without this hole? & Why? Appreciate all advice. Phil NZ

12-18-2013, 03:16 PM	#2
ford38v8 Senior Member Join Date: Jul 2011 Location: SF Bay Area Posts: 7,283	Re: 8ba Holley 94 Carb gasket to inlet manifold No hole. That's for the heat riser manifold for the Stromberg carburetor. You don't want or need heat on the bottom of the Ford/Holley 94 carburetor. __________________ Alan

12-18-2013, 04:10 PM	#4
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: 8ba Holley 94 Carb gasket to inlet manifold They need that small hole to get vacume from both barrels to the PV. All 94 gaskets from 56 down to late 38 have this hole. Stromberg gasket has no hole there. ken ct. That hole is for vacume NOT heat.

12-18-2013, 07:31 PM	#6
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: 8ba Holley 94 Carb gasket to inlet manifold Sponsored Links (Register now to hide all advertisements) Ross I beg to differ with you that passage comes out right under the PV which is where PV gets vac. to operate. The vac. passage on the rear of the base is for automatic trans carbs its a spark valve. ken ct.

12-18-2013, 11:40 PM	#8
Ross F-1 Senior Member Join Date: Nov 2010 Location: NM Posts: 2,443	Re: 8ba Holley 94 Carb gasket to inlet manifold Is there a hole in your manifold under the hole in the gasket? __________________ '52 F-1, EAB flathead

12-19-2013, 01:13 AM	#9
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: 8ba Holley 94 Carb gasket to inlet manifold If their is a hole in the manifold you have a 35-36 intake on there.Why do you think ALL 94 carb gaskets have that hole there.ALL Stromberg gaskets have no hole. ken ct.

12-19-2013, 01:46 AM	#10
ford38v8 Senior Member Join Date: Jul 2011 Location: SF Bay Area Posts: 7,283	Re: 8ba Holley 94 Carb gasket to inlet manifold Ken, you went and done it again! I'm confused and befuddled. Time for bed. __________________ Alan

12-19-2013, 07:29 AM	#11
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: 8ba Holley 94 Carb gasket to inlet manifold Well I try and keep you guys on the straight and narrow. I tell it like it is. That extra hole only appears on some of the 35-36 manifolds [not all] why I don't know.Which is for heat to the Strom. base also which DOES NOT have a hole there like the 94 carb.Their PV are mechanicly operated. That's why PV's blow or burn out when you get a backfire through the carb with 94's. ken ct. Sorry if you are confused.

12-19-2013, 08:52 AM	#13
Walt Dupont--Me. Senior Member Join Date: May 2010 Location: Gardiner Me. Posts: 4,200	Re: 8ba Holley 94 Carb gasket to inlet manifold I usually don't stick my nose into these stupid threads but the poor guy just asked a simple question. Most of those gaskets have that little hole, I don't know what it's there for but it don't do anything. There no exh there on those 8BA in takes. The PV gets it vacuum from a slot on the bottom carb. Someone has posted a pic. SO, don't worry about that little hole when using the late intake. Walt

12-19-2013, 09:43 AM	#15
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: 8ba Holley 94 Carb gasket to inlet manifold First of all Ross asked if he had a hole there in his manifold which only appears on some 35-36 manifolds.He could have had a wrong intake on it. ken ct.

12-19-2013, 07:14 PM	#16
Phil Gillespie Senior Member Join Date: Sep 2011 Location: Christchurch New Zealand Posts: 1,640	Re: 8ba Holley 94 Carb gasket to inlet manifold Thanks for all advice and assistance. My inlet manifold does not have the hole in it. 8BA inlett manifold So just fitted a gasket with this hole in the front.As have plenty of these ones. Found my high pitched squeal which as air bein sucked in at joint above. Again thanks. Phil NZ

12-19-2013, 07:20 PM	#17
Ross F-1 Senior Member Join Date: Nov 2010 Location: NM Posts: 2,443	Re: 8ba Holley 94 Carb gasket to inlet manifold I wonder if your power valve (economizer valve) is too tall, and is holding the throttle section off the bowl section? Some kits come with a PV that will do that. __________________ '52 F-1, EAB flathead

12-19-2013, 07:37 PM	#19
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: 8ba Holley 94 Carb gasket to inlet manifold I have shorter PV's in the correct # 5.5 that fit and work very well. Either that or your base to middle section gasket has a break in it some where. ken ct.

12-19-2013, 07:42 PM	#20
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: 8ba Holley 94 Carb gasket to inlet manifold He could also have the wrong gasket in there, the bigger venturies use a gasket with bigger holes in it and it wont work with the smaller venturies. Some kits come with both sizes of gaskets. The wrong one could have been used on a rebuild. ken ct. Ive seen it happen by DIYS rebuilders that don't know any better.