Single Intank Pump That Support 500rwhp
Senior Member
Joined: Sep 2002
Posts: 1,089
Originally Posted by vosko' date='Jan 20 2003, 08:56 AM
speed_nyc has a weldon pump OMG it is so loud. its ridiculous.... lol
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Joined: Jul 2001
Posts: 17,839
From: NJ
Originally Posted by SPEED_NYC' date='Jan 20 2003, 01:18 PM
[quote name='vosko' date='Jan 20 2003, 08:56 AM'] speed_nyc has a weldon pump OMG it is so loud. its ridiculous.... lol
it costs like $800 doesn't it ?
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Joined: Jul 2001
Posts: 17,839
From: NJ
Originally Posted by SPEED_NYC' date='Jan 20 2003, 04:30 PM
yeah, think about stuff like 'what was that grinding noise' or 'why dso i see little peices of tranny in my rearview?' 
Senior Member
Joined: Jul 2001
Posts: 273
From: oHIo
Stock FD or Supra pumps will not support the pressure or volume for 500RWHP when doubled let alone single. Figure about 20psi for that RWHP goal. Add that ontop of your base fuel pressure. Then calculate by the amount you have to squirt at 50C to acheive your goal. Now adjust that by factoring to see how much more fuel you have to squirt at 10C! You'll want the higher rated pump(s)!
But for that much RWHP, assuming you have the pump(s) to handle it, your fuel lines will now become the limiting factor. The stock line is closer to AN-04 than it is AN-06. If you go with FAT supply lines, you'll need to maintain volume @ pressure. So, ideally, if you're going to AN-08 supply, running 2 Walbro's will provide the same volume at pressure. And don't forget your return lines! You're pressure is dictated by the return line!
And while we are at it, get rid of that serial, primary-to-secondary setup. Have the single supply line branch to BOTH the primary and the secondary rails with AN-06, then back to either side of the fuel regulator.
Tony
But for that much RWHP, assuming you have the pump(s) to handle it, your fuel lines will now become the limiting factor. The stock line is closer to AN-04 than it is AN-06. If you go with FAT supply lines, you'll need to maintain volume @ pressure. So, ideally, if you're going to AN-08 supply, running 2 Walbro's will provide the same volume at pressure. And don't forget your return lines! You're pressure is dictated by the return line!
And while we are at it, get rid of that serial, primary-to-secondary setup. Have the single supply line branch to BOTH the primary and the secondary rails with AN-06, then back to either side of the fuel regulator.
Tony
Senior Member
Joined: Sep 2002
Posts: 656
From: Columbia,MO
Well if my pump won't cut it than I will get another one. Which one should I get to support my T78 @ 24psi. Not that I plan on running that much anytime soon, but I want a pump that could do it safely. To go external I need to Sump the tank and add the pump in-line, should I move my fuel filter in-line as well when I do it?