DuMaurier 7

After looking at the BOSCH 044 pumps , I've decided that they may be a bit too expensive right now ( I hope to be Buying an OS twin disc clutch soon , and the holidays are here) , so I am looking at a cheaper but effective alternative. Used stock parts for Jap spec cars are fairly cheap and abundant down here , so I am thinking about putting a pair of SUPRA TT or 300ZX TT pumps into my tank and T'ing their supply into the discharge of the A1000 and using the E6K to start them when required . I know a couple (if not all ) of you will say that its over kill , but with fuel I would much rather have more than less , I DO NOT want to pull my engine again , and as I said the cost of those pumps wouldn't be a REAL factor , and I would be more than able to install and set up the whole system , let me know what you guys think.

Badog

IGY

It sounds like you aren't going to run the supra pumps all the time. If you do this the pressure in the system will drop whenever you don't have all the pumps running at the same time. You can try it, and it might work as long as you run all the pumps all the time. I would try running the two Walbro 255L high pressure pumps all by themselves Y'd into the one -8 line(this is what I use). I know this setup will do 1.8kilo of boost on a secondary bridge w/ T51S, static fuel pressure of 3kilo, 4x1680cc inj, with no drop off.

88fc3sw/hx83

Igy,

I wanted your opinion on the BNR33 GTR fuel pump? According to some test flow results, they outflow any "in-tank" pump upto 75 psi.

DuMaurier 7

why would the system pressure drop when the pumps switch off ? , when they kick in their discharge pressure should equalize with the system pressure , the FPR should handle that . What I am looking for is more flow , my FPR (PAXTON) is supposed to be sized to flow 1000HP worth of fuel .

IGY

I'll use myself as an example; Running 2 pumps static fuel pressure of 43psi. One of the pumps stops working, fuel pressure goes to around 20 psi and car stalls. Another example; I was running one walbro pump, static fuel pressure of 43 psi. I installed the second walbro and the fuel pressure goes to 60 psi. Unless you have a little troll or a magic button that adjusts your fpr on the fly, turning pumps on and off is not going to work.

IGY

Stock R33 GTR pump only flows 210-215lph. Tomei makes an aftermarket upgrade GTR pump that flows 275lph, but I seriously doubt anyone wants to pay the $450 that the pump costs. A little birdy told me that the Bosch 044 pumps flow 280lph. Is this true? A friend of mine just installed a dual Bosch 044 setup in his car last week. What is the cheapest people are getting these pumps for?

88fc3sw/hx83

IGY,

Incase you didn't know, APEXI BNR33 GTR fuel pump is the Highest flowing intake fuel pump out. There are numerous sites that say this. Here is a link to Maxcoopers site http://maxcooper.com/rx7/parts_info/fuel/p...pexi_bnr32.html



and another link

http://www.stealth316.com/2-fuelpumpguide.htm#j8



I don't know how much power you're making using the tiny Walbro fuel pumps, but they're not highly regarded here in the U.S. by ANY of the top runners.

vosko

it is never a good thing to go cheap just get the twin bosch pumps and be done

jspecracer7

Well as a comparison, I remember a black FD3s with twin walboro fuel pumps beating a 20B TII with a TEC III and a T-76



Ask Dragon what he's using in his 20B.