I'm working on a car and I have BNR's on the way. The car currently has two stock 550's in the primary rails, two 1300's in the secondary rail and a Supra pump. I've seen where some have made ~425 rwhp and I should have plenty of fuel with the current srt up.

http://www.maxcooper.com/rx7/how-to/...tem/calcs.html

Now I have also seen where others have said where they were short on fuel with this set up but even with 1680's in the secondaries? Thought by those who have used the BNR's??? Is there something weird about these as far as fuel???

Maybe uping the fuel pressure with an Aeromotive pump...
http://realstreetperformance.com/sto...on-test-5.html

 

I made 421 on a dynapack at 17 psi non-seq, with 850/1300 and a Supra pump. IIRC the pump was running out of steam so extra fuel inj duty cycle was dialed to compensate. I was in the 90% + range.

If you search my username and 'BNR dyno' you'll find a bunch of my old threads with my setup

 

So if I toss out the Supra pump and use the Aeromotive do you think I'll have enough fuel?

 

If your goals are 400+ I'd say you'll need 850/1300s. You can try 550/1300 but I doubt you can max BNRs with them. Hotwiring the supra pump is another option, or moving up to a higher-flowing pump.

This thread has some good info:

https://www.rx7club.com/3rd-gen-archives-73/some-fuel-system-ramblings-578521/