Fuel Pump Upgrade! Dual Walbro 400s
#1
Fuel Pump Upgrade! Dual Walbro 400s
Just swapped out my densos for these. These guys are tiny! I could easily fit 3 in the returnless bucket! The walbro 255 is the same size as the denso 1020 for comparison.
If you have not read the thread I made about fuel injector flow vs pump flow, I highly recommend it here: https://www.performancetrucks.net/fo...p-flow-510434/
With these pumps I should have roughly 70L/hr more at a 5psi higher base pressure than the densos, so I should have plenty of fuel!
If you have not read the thread I made about fuel injector flow vs pump flow, I highly recommend it here: https://www.performancetrucks.net/fo...p-flow-510434/
With these pumps I should have roughly 70L/hr more at a 5psi higher base pressure than the densos, so I should have plenty of fuel!
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What size is the outlet nipple? I'd suggest leaving your base pressure at 43.5, then boost reference 1:1. That pump flows a lot of fuel at the lower pressure! That's what I'm going to do, but with just a single pump.
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Excellent spreadsheet! Thanks! With that you can make sure your pump keeps up with injector flow, AND, you can back work it so you don't get too much (unneeded) pump! What is the outlet nipple size on the 262, or the 267 pump?
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Thanks! And you're running the return line back into the bucket, right? Are you leaving the EVAP in it's place on the top of the "hat". That seems to be the biggest stumbling block with the early (04-05) returnless systems. That stuff take up a lot of space!