Sorry to bring up an old thread but I had a question regarding the flow numbers quoted. Do you have any data on what the volume flowed per stroke of the stock HPFP? I have found that Bosch Makes a series of HPFP's that flow 1.1 cubic centimeters of fuel per stroke and support 200+ or 500 Bar of pressure depending on model. Doing some math on the flow numbers that Shaun posted, the stock pump looks to only flow 0.15 cubic centimeters per stroke. It seems like the Bosch pumps I found would provide MORE than enough fuel for pump gas and even enough for E85 up top (they may be near the limit in lower rpm's depending on boost levels)