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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Fried Fuel Pump
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Tue, 15 April 2003 14:32
 
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heya,
how is the crummydore pump like for sucking the fuel? i hear rumours that many EFI pumps are not good at scavenging fuel from the tank, and then cavitate, run dry and blow up... if you surge tank it and get a lifter pump, there's no chance of running dry.
if you run the fuel rail return line to the surge tank, you only need a small pump to supply the surge tank (as it replaces the fuel the engine actually uses, which will be much less, on average, than your injector size)..
at worst, get a low pressure pump which is rated at say 10% more flow than the external pump is rated _at fuel rail pressure_ (it won't flow more than that unless your rail pressure goes down.. and that's all bad) and then just run it in series with the EFI pump. the low pressure pump will be better at scavenging theu the little lines to the tank, and you could T the rail return to between the two pumps to reduce the work done by the first pump (so it can be smaller/cheaper)
anyhoo, hope this gives ya some ideas...
Cya, Stewart
ps, there is a VL turbo pump on ebay atm for about $60...
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