WHICH FUEL PUMP

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mr m
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WHICH FUEL PUMP

Post by mr m »

Hi Need to replace the mech fuel pump on the 400 cu in b engine, original pumps were 20gpm 5/16" inlet.
already has an aftermarket uprated one on it but not sure what its rating is, was thinking of using the 71 440 cuda one as has 3/8" inlet and 33gpm and can get from rock auto
Will this fit ok does anyone know and any suggestion's, car is rated 480hp
IF ITS ON WHEELS, LOWER IT!!
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Pete
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Re: WHICH FUEL PUMP

Post by Pete »

I used the Carter M4862 Big Block Mopar pump in my 440-6, worked well.

Keep an eye on the push rod - they can wear and cause problems with under-fuelling especially at higher rpms...

These flow 120 US GPH so not sure where you get your figures....
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Blue
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Re: WHICH FUEL PUMP

Post by Blue »

The Carter mechanical pump solved a fuel starvation issue I had with a hot 440, you do need to use a fuel pressure regulator with it though.
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mr m
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Re: WHICH FUEL PUMP

Post by mr m »

tks for info guys, sorry it meant 20gph minimum, That is the one i was looking at will give it a go :thumbright:
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Pete
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Re: WHICH FUEL PUMP

Post by Pete »

I must admit I did not use a pressure regulator on my 6 Pak set up, but then again the carbs may have been bleeding off more pressure than a 4bbl set up...never suffered from float bowls flooding or over-fueling.
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mr m
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Re: WHICH FUEL PUMP

Post by mr m »

found my issue luckily had a spare one worn bigtime
still gonna renew pump though
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Blue
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Re: WHICH FUEL PUMP

Post by Blue »

Very common issue on big blocks. If you can believe what you read on the forums, the new replacements wear more rapidly than original parts.
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Pete
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Re: WHICH FUEL PUMP

Post by Pete »

Agreed, you can get some with different finished ends and different materials. I tried to use originals where possible.

I used to carry spare pushrods in the car - that's how much they can wear!!!
Pete Wiseman; Cambridge.

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mr m
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Re: WHICH FUEL PUMP

Post by mr m »

blimey didnt know that its an original one i have fitted🙏
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mygasser
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Re: WHICH FUEL PUMP

Post by mygasser »

they had that problem with the 'crop duster' on roadkill garage, the engine fell flat at half track (1/8 mile) as it was running out of fuel in the carb float bowls.
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Re: WHICH FUEL PUMP

Post by v8rumble »

Interesting, where do you buy just pushrods?
mr m
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Re: WHICH FUEL PUMP

Post by mr m »

bought an ARP one to keep as as pare from amazon google 440 fuel pump pushrod and have a look at the options
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Re: WHICH FUEL PUMP

Post by v8rumble »

:thumbright:
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