felix_is_alive

does anyone know a fuel pump (intank ) that can support , say 1000 hp i know its overkill but better be safe than sorry
are two cosmo pumps any good , has anyone tried it??
i have seen the evil7 site and he has two bosch pumps that support 800hp each , does anyone have the part numbers for that pump??

johnisenglish

I was talking to Aermotive about that a few weeks ago, and they said that the problem at that point is that you have issues with the pickup. To support that much power a pump is going to have to suck up a god awful lot of fuel, and during heavy turns, heavy acceleration, etc, the fuel in the tank can slosh around and the small bit thats left it in pick up will be used before the rest of the fuel settles once again.

So pretty much, you need a sump, which lends itself to an external pump.

However, to answer your question, Aermotive says that their A1000 can be mounted in the tank, or the roof, or anywhere else you please. They do recommend that you install a sump and mount it externally and below that sump.

I'm using two Walbro units, because at the peak pressure that I'm going to be having at max boost and WOT, they actually flow MORE then the aermotive unit, and cost substantialy less. Ofcourse, I may have issues with the pickup in the tank, but based on other peoples experiences I'm not too worried about that.

johnisenglish

By the way, I've got all the numbers for this, I'll post them after I eat breakfast when I have time to dig them up

felix_is_alive

thanx, isnt the two walbro-pump-setup what those 900hp supras run???

RotorMotor

iTrader: (5)

ok i asked this in the FD section but no help there on pumps... how far can i take the cosmo pump (this is for my 20b BTW)... im running it in stock form for now... then new turbos yada yada later

felix_is_alive

not shure , on stock twins you might be able to get 14~15psi with 3rotor pump

RETed

Stock Cosmo is a waste of time.
Even a 255lph Walbro flows more...
Aeromotive make some of the largest FI fuel pumps in the business, but I dunno if a single one can support 1000hp on a rotary - more like 800hp.
The Bosch ones are probably the infamous "Bosch Motorsports" units (part number ends in -044), but they only support up to 500hp on a single fuel pump - I dunno of any larger one, and I doubt they make one that supports 800hp on a single pump.
The only thing that can support huge flow numbers on a single fuel pump is probably the Weldon units; these are used on methanol burning engines and flow gargunatuan amounts of fuel for a single pump - 360gph from Shane Racing.

Side note, if you run twin fuel pumps it's recommended to run separate pick-ups and sumps for each in the fuel tank.


-Ted

felix_is_alive

weldon pump........hhhmmmm i dont know ......just too much noise.....i was looking more into a two pump intank setup , say two cosmo`s,or two walbrough`s, two bosch, i just didnt want to run an external ,..i dont know what do you guys think???

88fc3sw/HX83

YEP, two of any of those pumps will work. Ari use to run two cosmos in his FD and we all know the #'s he made.

RotorMotor

iTrader: (5)

ok from my research-> cosmo pump can do 250lph at 12v and 43psi if i remember correctly... so if you run 2 you should be fine.

does anyone have a diagram of running 2 intank pumps? what is the setup/mounting like... im off to do some searching...

felix_is_alive

hhhmmm so all i need now is another cosmo pump and i should be fine ......interesting

OC94Rx7

Hello Heath
Here is a thread from the single forum
https://www.rx7club.com/showthread.p...hreadid=274902
Shawnk is working on 2 intake pumps. Maybe he can help you?

Oliver

RotorMotor

iTrader: (5)

thanks oliver! i have a used cosmo pump w/ 10Kmi that i got from the forum ($125) on its way. i think i read that if you run 2 pumps you would want 2 separate pick up tubes??? hopefully oliver's link will answer some of the questions i have.

oh yeah, also if you want to squeeze a little extra from the cosmo pump it can be run at 14.5v to yeild an output of ~280lph @43psi if i remember correctly. id feel more comfortable running 2 pumps though. also, another tip that was mentioned, is that upgrading the stock power wiring for the pump should yeild extra output as the stock wiring is garbage (especially if you are using 2 pumps). in any case i would be extreemly careful making my own wires that go to the GAS TANK (if you know what i mean ) -heath