Anyone recommend a fuel pump or pumps for a nnbs with a procharger. I've already bought everything to convert it to return style I just don't know what pump I should go with. I'm about maxed out now with a stock flex fuel pump at 550 rwhp on 9# now

 

A walbro 450lph pump should do good on pump gas.

 

What would you recommend for E85?

 

Two 450's.

Just based on what walbro says, the 450 handles E85 no problem but I can only assume that one pump is good for 700+ hp on gas only. Go to E85 and you need atleast 30-40% more fuel flow, so two large pumps would for sure be enough.

 

Running 2 450's for E85 on a Procharged 5.3 with 630rwhp. No shortage of fuel. 2nd pump is on a Hobbs switch. I rotate the pumps periodically so they get the same run time.

Also, TI Automotive makes 2 versions of the 450 nowadays. One has a higher relief pressure for those running high boost.
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