Hello everyone, thought I'd submit a viewpoint to this thread as I commissioned some of the recent testing at Kinsler for the OEM Supra pump.
Firstly, these fuel pumps are extremely sensitive to the voltage being applied. Therefore any comparison between flows of various pumps requires the voltage to be given as well. It's as meaningless to compare flows without voltages as it is to compare flows without knowing the pressures.
Secondly, neither Jeff Lucius (a Dodge Stealth owner) nor myself (a MKIV Supra owner) have any axes to grind with HKS or any aftermarket vendors, however if HKS are indeed simply rebadging a Mazda Cosmo Denso pump, and charging triple the price for it, then personally I'd rather buy the OEM Supra pump which is proven to flow more under the same conditions.
We're currently trying to get a group together to commission the same testing on the Walbro pump, since all figures we have to date are based only on Walbro's published data, not from independent testing. If anyone has really deep pockets, it would be very interesting to buy & test the current HKS offering as well.
John
