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  #16 (permalink)  
Old 07-15-2010, 02:02 PM
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Quote:
Originally Posted by jmichaelre
The pump has a return so it won't be deadheaded right?
I believe that 'extra' hose barb on the pump is a vapor line to the tank or charcoal canister. Someone correct me if this is wrong.

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Old 07-15-2010, 02:12 PM
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I have my return line hooked to that smallest port on the fuel pump. Its where it was hooked up on the old engine.
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Old 07-15-2010, 02:20 PM
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the pumps with the small connection were intended for circulating fuel back to the tank to help with vapor lock. I think. Some cars had the fitting on the fuel filter.
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Old 07-15-2010, 02:40 PM
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Quote:
Originally Posted by lmsport
the pumps with the small connection were intended for circulating fuel back to the tank to help with vapor lock. I think. Some cars had the fitting on the fuel filter.

that sounds like a return to me
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  #20 (permalink)  
Old 07-15-2010, 02:47 PM
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Quote:
Originally Posted by lmsport
the pumps with the small connection were intended for circulating fuel back to the tank to help with vapor lock. I think. Some cars had the fitting on the fuel filter.
Thanks for the correction.

BTW, was this the type w/a small sized brass-looking restriction visible inside the barb?
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Old 07-15-2010, 02:51 PM
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I don't remember seeing any type of restriction in the outlet barb if that what you mean. I had to buy a fitting for it when I was at the store cause I didn't have the original pump.

I'm guessing you think the fitting might be causing the high pressure?
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Old 07-15-2010, 03:27 PM
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Back on the 5th, there was a THREAD asking about the restriction shown here:



There was no real resolution to the question. It would seem, however, that the size of the restriction on this pump could have an effect on the pressure supplied to the carb.
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Old 07-16-2010, 08:47 AM
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there is no restriction like that on smallest port of the fuel pump
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