Bosch '910 *2
11-22-2003, 06:42 AM
#2
Member
Join Date: Aug 2002
Posts: 65
044 - 200L/hr @ 5Bar
910 - 130L/hr @ 5Bar
Bosch seems to rate most of their pumps at 5 Bar. If your running 45psi static pressure and a 1:1 regulator then you probally won't exceed 5 Bar of fuel pressure unless you running crazily high boost. So you would end up with more flow at the lower fuel pressure. Anyway we'll just use those numbers as a worst case senario.
The old rule of thumb is you need 1L/min for every 200hp for a piston engine. However, smelly old rotaries and turbos need a bit more.
For the 910 pumps: 130L/hr = 2.17L/min supports appoximatlely 400hp. So with two of these you would have a **** load of fuel.
Two 044s just seems excessive to me, unless I'm missing something.
910 - 130L/hr @ 5Bar
Bosch seems to rate most of their pumps at 5 Bar. If your running 45psi static pressure and a 1:1 regulator then you probally won't exceed 5 Bar of fuel pressure unless you running crazily high boost. So you would end up with more flow at the lower fuel pressure. Anyway we'll just use those numbers as a worst case senario.
The old rule of thumb is you need 1L/min for every 200hp for a piston engine. However, smelly old rotaries and turbos need a bit more.
For the 910 pumps: 130L/hr = 2.17L/min supports appoximatlely 400hp. So with two of these you would have a **** load of fuel.
Two 044s just seems excessive to me, unless I'm missing something.
11-23-2003, 09:56 PM
#4
Senior Member
Join Date: Dec 2001
Location: Okinawa Japan at McDonalds
Posts: 472
Originally Posted by little rotor' date='Nov 22 2003, 09:42 PM
044 - 200L/hr @ 5Bar
910 - 130L/hr @ 5Bar
Bosch seems to rate most of their pumps at 5 Bar. If your running 45psi static pressure and a 1:1 regulator then you probally won't exceed 5 Bar of fuel pressure unless you running crazily high boost. So you would end up with more flow at the lower fuel pressure. Anyway we'll just use those numbers as a worst case senario.
The old rule of thumb is you need 1L/min for every 200hp for a piston engine. However, smelly old rotaries and turbos need a bit more.
For the 910 pumps: 130L/hr = 2.17L/min supports appoximatlely 400hp. So with two of these you would have a **** load of fuel.
Two 044s just seems excessive to me, unless I'm missing something.
910 - 130L/hr @ 5Bar
Bosch seems to rate most of their pumps at 5 Bar. If your running 45psi static pressure and a 1:1 regulator then you probally won't exceed 5 Bar of fuel pressure unless you running crazily high boost. So you would end up with more flow at the lower fuel pressure. Anyway we'll just use those numbers as a worst case senario.
The old rule of thumb is you need 1L/min for every 200hp for a piston engine. However, smelly old rotaries and turbos need a bit more.
For the 910 pumps: 130L/hr = 2.17L/min supports appoximatlely 400hp. So with two of these you would have a **** load of fuel.
Two 044s just seems excessive to me, unless I'm missing something.
According to those #'s for the Bosch pumps, the Walbro 341 has similar flow to the Bosch 044 pump at 7 bar. I know Walbro pumps are crap, just stating an observation.
11-24-2003, 03:19 AM
#5
Member
Join Date: Aug 2002
Posts: 65
Why do you say Walbros are crap? I've always thought that 341's offered a pretty good bang for the buck.
And yeah there will be some pressure drop.
Even still, though I don't have any personal experience, I think two Bosch 910's will be easily sufficient.
And yeah there will be some pressure drop.
Even still, though I don't have any personal experience, I think two Bosch 910's will be easily sufficient.
11-24-2003, 04:24 AM
#6
Senior Member
Join Date: Dec 2001
Location: Okinawa Japan at McDonalds
Posts: 472
Originally Posted by little rotor' date='Nov 24 2003, 06:19 PM
Why do you say Walbros are crap? I've always thought that 341's offered a pretty good bang for the buck.
And yeah there will be some pressure drop.
Even still, though I don't have any personal experience, I think two Bosch 910's will be easily sufficient.
And yeah there will be some pressure drop.
Even still, though I don't have any personal experience, I think two Bosch 910's will be easily sufficient.
11-30-2003, 11:22 PM
#7
Senior Member
Join Date: Jun 2003
Location: San Antonio TX/Okinawa Japan
Posts: 208
If anyone is looking for a in-line fuel pump, the Airtex E8248 is rated at 60-70gp at 70psi, max pressure is 125psi. Cost is 120-150$ price range. Ran one pump with a 60-1 turbo at 20psi with the stock FPR and fuel pressure was a constant 65psi +/- 2 under boost. Added another pump when the T66 with 4 more injectors were installed. Tried to run both pumps through one stock FPR but the idle pressure was to high. The stock FPR can not handle the volume of fuel two pumps produces. My solution was to run two stock FPR's. One pump runs half my injectors through one stock FPR and my idle fuel pressure is back to a manageable pressure. didn't want to buy a aftermarket FPR. didn't want to run the high idle fuel pressure, my fuel pressure under boost would have been in the high 70's low 80's. Now at 20-25 psi of boost my fuel pressure is in the working range of my fuel pumps. Run both fuel pump from a 2 qt. fuel surge tank. Most local parts stores carry this pump if they carry Airtex products.
Just a suggestion and my personal experience with this pump.
chuck
Just a suggestion and my personal experience with this pump.
chuck
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