Tiny Fuel Tank Pickup Line
05-09-04, 08:01 AM
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Location: Australia
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Tiny Fuel Tank Pickup Line
Ive got a 13BT conversion into my SII RX7.
My fuel system has been upgraded - 1700cc indy blues, 044 bosch pump, surge tank, carter lift pump, SX fuel pressure regulator etcetc.
Having a look at the factory fuel tank I can see the feed line is tiny. Im talking tiny here folks!
Since this is a suction line at low pressure, this has really got me worried. Graham Bell in his book on forced induction talks about a 1/2" line being good for around 650hp - now thats for the BSFC of a piston engine typically. So given the BSFC of a rotor, your looking at around 520hp or so.
So what am I going to do? I guess remove the tank and braze in a modified pickup with a 1/2" feed line? Or put two pickups in there at different corners each with a 1/2" feed line?
Has anyone done anything about this?
My fuel system has been upgraded - 1700cc indy blues, 044 bosch pump, surge tank, carter lift pump, SX fuel pressure regulator etcetc.
Having a look at the factory fuel tank I can see the feed line is tiny. Im talking tiny here folks!
Since this is a suction line at low pressure, this has really got me worried. Graham Bell in his book on forced induction talks about a 1/2" line being good for around 650hp - now thats for the BSFC of a piston engine typically. So given the BSFC of a rotor, your looking at around 520hp or so.
So what am I going to do? I guess remove the tank and braze in a modified pickup with a 1/2" feed line? Or put two pickups in there at different corners each with a 1/2" feed line?
Has anyone done anything about this?
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05-09-04, 02:56 PM
#8
Here is mine. I got the car with the fuel cell sitting on top of the spare tire hole backwards. Whoever's bright idea it was to mount it like this was smoking crack. I mounted the cell below after figuring out where to trim the new sheet metal. There is still a gap in front, but I might use it to route the breather line.
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