Mario Posted November 13, 2012 Share Posted November 13, 2012 Nice comparison provided by sound performance between common fuel pumps used, Quote Link to comment Share on other sites More sharing options...
johnny g Posted November 13, 2012 Share Posted November 13, 2012 That Walbro 416 looks pretty great. Quote Link to comment Share on other sites More sharing options...
Mario Posted November 13, 2012 Author Share Posted November 13, 2012 Yes, looks pretty good indeed. Quote Link to comment Share on other sites More sharing options...
Geo Posted November 13, 2012 Share Posted November 13, 2012 i'll be going the walbro 416 route, once i get my arse in gear and order one off Lee. Quote Link to comment Share on other sites More sharing options...
Al Massey Posted November 13, 2012 Share Posted November 13, 2012 Think the walbro 416 will be getting ordered by me Quote Link to comment Share on other sites More sharing options...
johnny g Posted November 13, 2012 Share Posted November 13, 2012 I don't think we'll be seeing any more Twin 044 installs now!! Quote Link to comment Share on other sites More sharing options...
mwilkinson Posted November 13, 2012 Share Posted November 13, 2012 (edited) Nice find. I have been looking for something like this for some time. I note, whilst the Walbro unit has some superb flow rates at relatively low PSI, there is a significant change in flow rate vs PSI. The Bosch on the other hand has a relatively low flow rate change vs PSI. Is this significant? I am in the process of swapping my Bosch pump for a single Walbro 450lph pump. I chose to do this as the flow appears to be enough, with uprated lines, for my power target of 800bhp. I want to avoid the staggered twin pump setup due to complexity and noise. Any opinions or thoughts on this? Is fuel pressure regulated accurately enough with an FPR to maximise a single pump at 800bhp? Edited November 13, 2012 by mwilkinson (see edit history) Quote Link to comment Share on other sites More sharing options...
johnny g Posted November 13, 2012 Share Posted November 13, 2012 Depends on your boost really. Big turbo + low boost = lower fuel pressure. IIRC. 3bar static = 43.5psi Running 1.7bar = 24.7psi Sum of both = 68.2psi. Round up to 70psi = 355l/hr - comfortably higher than most. Quote Link to comment Share on other sites More sharing options...
Samurai 20V Posted November 13, 2012 Share Posted November 13, 2012 i'll be going the walbro 416 route, once i get my arse in gear and order one off Lee. Would it not be overkill at BPU? Quote Link to comment Share on other sites More sharing options...
absz Posted November 13, 2012 Share Posted November 13, 2012 Flowing that much fuel as the 416lph will most proberly require some sort of fuel cooler or you may suffer vapour lock Quote Link to comment Share on other sites More sharing options...
Wez Posted November 13, 2012 Share Posted November 13, 2012 Its a shame the comparison doesnt detail current draw as well. Nice info though Quote Link to comment Share on other sites More sharing options...
Littler Posted November 13, 2012 Share Posted November 13, 2012 Would it not be overkill at BPU? Maybe, but Geo won't stay at just BPU Quote Link to comment Share on other sites More sharing options...
Geo Posted November 13, 2012 Share Posted November 13, 2012 Would it not be overkill at BPU? always plan ahead Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 13, 2012 Share Posted November 13, 2012 They are showing information from three totally different sources. No temperature offset figures, and as Wes mentions, no current draw figures. Very poor comparison. You usually find things that need to run a low voltage DC motor, hard, and are also miniaturised suffer reliability and heating issues. You DO NOT want to be heating your fuel more than necessary. That's why the Bosch one is a big bugger, it has a big motor run conservatively.... And it's why 95% of professional motorsport teams run Bosch fuel pumps rather than anything else. Quote Link to comment Share on other sites More sharing options...
andz222 Posted November 13, 2012 Share Posted November 13, 2012 is it ok for bpu Quote Link to comment Share on other sites More sharing options...
mwilkinson Posted November 13, 2012 Share Posted November 13, 2012 Ref current draw, found some figures from a test on an Australian Skyline forum. Running at 13.5v on normal pump fuel 98 Ron. 50 Psi - 14.8 amps 60 psi - 15.6 amps 70 Psi - 16.5 amps Quote Link to comment Share on other sites More sharing options...
Stephen G Posted November 13, 2012 Share Posted November 13, 2012 is it ok for bpu i was using a 044 at bpu no problem Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 13, 2012 Share Posted November 13, 2012 is it ok for bpu Which one? They are both fine for "BPU", as is a healthy stock pump. Quote Link to comment Share on other sites More sharing options...
Paul Whiffin Posted November 14, 2012 Share Posted November 14, 2012 Plenty of the Walbro 450's in stock if required. I can organise a group buy if there is enough interest? Quote Link to comment Share on other sites More sharing options...
Paul Whiffin Posted November 14, 2012 Share Posted November 14, 2012 Oh and they are very good indeed, we've tested them up to 750bhp so far. Quote Link to comment Share on other sites More sharing options...
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