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IMR-Merlin IMR-Merlin is offline
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Join Date: Oct 2010
Location: Southern NH
Posts: 3,553
Quote:
Originally Posted by spuggy View Post
Have you found a pump with a higher spec than 044? That actually performs better? (hint: the Walbro "300 litre" pump doesn't perform anything like as well as the 044 - also rated at "300 litres" - and the difference is especially marked at higher - e.g. CIS - pressures).

I make 425 FWHP on CIS with a single 044 up front. When I go EFI, I don't see any reason at all to fit another pump. Because the pressure will drop (roughly halve) - the flow will increase correspondingly.
Are you telling me that the Bosch 044 is the high water mark for inline fuel pumps?
I would think that a high revving NASCAR engine or a 2000 HP drag car would be running a higher flow rate than a 265 lph 044.

If you are fine with the single 044, then why the redundant system with 2 pumps? Is there an issue with pump cavitation and losing pressure under max flow? I am just curious as to the benefits of 2 equal rate pumps performing the same task a 1 higher flow pump.

I am running oil lines forward for my oil tank and I could run fuel lines in a new location if it was beneficial.

Thanks for all the feedback

Brendon
Old 03-22-2013, 04:42 PM
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