Holley 94 auestion 1 Attachment(s)
While trying to get two usable carburetors together, I ran across this one that has a different fuel line fitting. Is this something that came stock or maybe it was used to repair the fuel inlet threads?
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Re: Holley 94 auestion 1 Attachment(s)
another pic
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Re: Holley 94 auestion Yes, that’s a repair. More than one way to skin a cat, repair fittings have been around since back in the day, yours looks to be a modern version.
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Re: Holley 94 auestion Any idea where I could get another?
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Re: Holley 94 auestion It's a heli coil repair thread size 7/8 x 20 TPI. Look it up on Google.
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Re: Holley 94 auestion Quote:
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Re: Holley 94 auestion I thought helicoils were stainless. That looks to be a brass insert of some kind. Keensert?
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Re: Holley 94 auestion The threads in a 94 bowl should be 1/2 x 20. That does look like a insert to me not a helicoil. I think either will work as long as its installed square, it has to seal with the gasket.
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Re: Holley 94 auestion You'd probably be able to find an unmodified carb top easier, Art. Unless the repair is truly a commonly found and well known device.
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Re: Holley 94 auestion I would think a common Helicoil would have a tendency to leak in that application. I would prefer to use some kind of insert.
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Re: Holley 94 auestion 1 Attachment(s)
Quote:
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Re: Holley 94 auestion Quote:
How could it possibly be a 7/8 x 20 thread ? The boss on the carb isn't even that big. Sal |
Re: Holley 94 auestion The brass part that is marked ".098" looks to me like the fuel inlet/seat of off a Stromberg 97? I don't think it's a 94 Holley part.
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Re: Holley 94 question Quote:
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Re: Holley 94 auestion I think this is the thread insert;
https://www.stromberg-bulletin.com/s...et-thread-fix/ |
Re: Holley 94 auestion Not sure what Clive is saying by never seeing a 1/2" thread. They're all 1/2" by design.
I wonder if the fix was to take them to 9/16" I've never had a stromberg, can I assume the thread is the same as a 94? 1/2"-20? I'm just going by my 94 experience. Mart. |
Re: Holley 94 auestion Quote:
The fuel line connection is the same as the Holley but where it threads into the carb it's 7/16. It's an expensive repair by the time you purchase the inlet, insert, proper drill and tap. Not to mention associated shipping costs. |
Re: Holley 94 auestion 3 Attachment(s)
My Holley 94 experiment for the day.
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Re: Holley 94 auestion Art, are you rethreading a pipe thread to 1/2-20? To make it a face seal instead of an olive (as we call them) fitting?
I actually went out to the garage (it's nearly midnight here) to check a 94 is 1/2 -20. I began to doubt myself. so, if I have this right, a stromberg has a brass fitting with a 7/16 thread into the carb. This brass fitting takes the normal 1/2" "ford" nut. this is adapted into a worn out or damaged holley by threading out to 9/16 and using an insert to adapt down to 7/16 to take the brass piece robbed from a stromberg? I can see why you're using the lathe to get you out of a mess. Mart edit: "standard" (UNF) for 7/16 is a 20 tpi pitch. 24 is used on weatherhead fittings like brake pipes for 1/4" tube nuts. |
Re: Holley 94 auestion Quote:
I turned down this $3 fitting to .503 , smoothed out the threads in the carb with a .500 bit, Added a bit of sleeve retainer and pressed it together. |
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