The Ford Barn

foxfire42 · 07-24-2011, 04:14 PM

I'm having carb problems especially with a sticking float. My car is a stock 1934. The carb says 97 and P19400. The venturi is 31/32. If this is a 97, I read that a "48" is actually correct for 34. The main difference being the size of the venturi. Is there any benefit to keeping this one and having it bebuilt or should I look for a 48? I'll probably be into it the same financially either way.

Thanks

f1builder · 07-24-2011, 05:22 PM

i doubt you would notice much difference between the 97 and the 48 in every day driving. yours is a 97 as the 48 venturi is 1 1/32. the 97 is the more popular and the parts all interchange for both. there are several threads that tell the story on how to rebuild or you can send your carb to one of the guys on hamb (kenct/uncle max to name 2) and they will fix you up proper with a bolt on rebuild. good luck and have fun.

BrianCT · 07-24-2011, 05:25 PM

The correct carb is a model 48 that is not marked 48. Ford or Stromberg Put the 48 on starting in 1935. If you are not going to go for a 1000 point judged car stay with the 97. Many were retrofitted to 34's. I have had no sticking trouble with the Grose jet style float control and highly recommend it.

Walt Dupont--Me. · 07-24-2011, 08:50 PM

Don't use the rubber tip needle and seat, The core fuel will make the needle stick. Also use the leather acc pump. Walt

Walt Dupont--Me. · 07-25-2011, 07:53 AM

That is supposed to be corn fuel. Walt

Terry,OH · 07-25-2011, 11:10 AM

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as mentioned the 48 for 34 is not marked 48, the marking started in about 1935. The basic size of the 1934 (model 48) Carb. is slightly larger than the 97, but the extra size is not needed. If you wish to keep the single 97 on the car you can rebuild it your self using a 97 rebuilding kit and if you want to replace any of the other parts not in the typical rebuilding kit get parts for a 97 such as the main jets .045 or the economizer valve #65. If you live above 5,000 ft use main .043 and above 10,000. ft use .041 main jets. The original style fuel inlet valve with .098 size and an all steel needle work well.

Pete · 07-25-2011, 01:05 PM

Quote:

Originally Posted by Walt Dupont--Me.

Don't use the rubber tip needle and seat, The corn fuel will make the needle stick. Also use the leather acc pump. Walt

Several years ago I got some needle kits from Uncle Max and they had nitrile rubber tips. Nitrile rubber will stand just about any chemical you can pour through it except hydrazine and picric acid.
I like the rubber tip ones because they never leak and you can run 6 lb of fuel pressure with no seeping. Many modern carbs use them.

07-24-2011, 04:14 PM	#1
foxfire42 Senior Member Join Date: May 2010 Location: AZ and WA Posts: 766	Stromberg Carb question I'm having carb problems especially with a sticking float. My car is a stock 1934. The carb says 97 and P19400. The venturi is 31/32. If this is a 97, I read that a "48" is actually correct for 34. The main difference being the size of the venturi. Is there any benefit to keeping this one and having it bebuilt or should I look for a 48? I'll probably be into it the same financially either way. Thanks

07-24-2011, 05:22 PM	#2
f1builder Senior Member Join Date: Jan 2011 Posts: 554	Re: Stromberg Carb question i doubt you would notice much difference between the 97 and the 48 in every day driving. yours is a 97 as the 48 venturi is 1 1/32. the 97 is the more popular and the parts all interchange for both. there are several threads that tell the story on how to rebuild or you can send your carb to one of the guys on hamb (kenct/uncle max to name 2) and they will fix you up proper with a bolt on rebuild. good luck and have fun.

07-24-2011, 05:25 PM	#3
BrianCT Senior Member Join Date: May 2010 Location: Windham, CT Posts: 703	Re: Stromberg Carb question The correct carb is a model 48 that is not marked 48. Ford or Stromberg Put the 48 on starting in 1935. If you are not going to go for a 1000 point judged car stay with the 97. Many were retrofitted to 34's. I have had no sticking trouble with the Grose jet style float control and highly recommend it. __________________ [FONT=Comic Sans MS]

07-24-2011, 08:50 PM	#4
Walt Dupont--Me. Senior Member Join Date: May 2010 Location: Gardiner Me. Posts: 4,200	Re: Stromberg Carb question Don't use the rubber tip needle and seat, The core fuel will make the needle stick. Also use the leather acc pump. Walt

07-25-2011, 07:53 AM	#5
Walt Dupont--Me. Senior Member Join Date: May 2010 Location: Gardiner Me. Posts: 4,200	Re: Stromberg Carb question That is supposed to be corn fuel. Walt

07-25-2011, 11:10 AM	#6
Terry,OH Senior Member Join Date: May 2010 Posts: 5,394	Re: Stromberg Carb question Sponsored Links (Register now to hide all advertisements) as mentioned the 48 for 34 is not marked 48, the marking started in about 1935. The basic size of the 1934 (model 48) Carb. is slightly larger than the 97, but the extra size is not needed. If you wish to keep the single 97 on the car you can rebuild it your self using a 97 rebuilding kit and if you want to replace any of the other parts not in the typical rebuilding kit get parts for a 97 such as the main jets .045 or the economizer valve #65. If you live above 5,000 ft use main .043 and above 10,000. ft use .041 main jets. The original style fuel inlet valve with .098 size and an all steel needle work well.