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Skeese’s E85 Fuel System for 750 RWHP Thread

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Old 05-18-17, 08:44 PM
  #101
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I was going to say the same thing. I love pushlok style hose and fittings but they really do need a bit of flex so as not to eat themselves.

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Sounds mean as hell!

Nice update.

One thing from my experience, keep a very careful eye on the short lines from the two pumps to the Y fitting.

Because the hose is stiff and the run is short with the push lock nipples taking up length you can see there is a tighter bend right at the nipple end on the Y fitting. This will tend to abrade the hose from the inside and it will split earlier than it would otherwise.

If you go to -an style you will lose the push lock nipple length for a longer hose length to have the bend in and there won't be the internal stress riser of the nipple against the short radius of the hose bend.

-edit- actually, this would be a prime place for steel hardline and tube nuts. I am not a fan of Aluminum because it fails with vibration and it is connected right to the pumps.

I lost a motor from this when I first did my '044 in-tank. The hose lasted about a mile and ofc failed under WOT. Your mileage may vary, but I would hate to see it fail ever.

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Old 05-19-17, 09:58 AM
  #102
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Any worries about the loop of hose from the secondary rail to FPR looping over the turbo?

I can't tell how close it is, so its probably not a big deal.


is there any advantage to running the rails in parallel vs series?
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Old 05-19-17, 09:39 PM
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EFR9180 26.5psi just shy of 750rwhp, E85. 2x 044 pumps running at 70psi base fuel pressure. 13.5v at the pumps. Genuine 044's are very hard to beat in terms of performance, reliability, life span, current draw, and cost.
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Old 05-20-17, 02:06 AM
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Originally Posted by dguy View Post
I was going to say the same thing. I love pushlok style hose and fittings but they really do need a bit of flex so as not to eat themselves.
Another issue with this Y setup is if you lose one pump the good pump will back feeds through the bad pump. Depending on what the fuel demands are one pump may be enough to save your motor even if it is lean but if it back feeds through the bad pump probably not.

Using a fuel log with the OEM 044 check valves may solve both potential problems.

There are tons available. Here is an example that would fit the way you currently have things routed.

Dual Bosch Fuel Pump Log Black
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Old 05-20-17, 11:34 AM
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Check Valves!
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Old 05-20-17, 12:19 PM
  #106
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Quote:
Originally Posted by Gilgamesh View Post
Any worries about the loop of hose from the secondary rail to FPR looping over the turbo?

I can't tell how close it is, so its probably not a big deal.


is there any advantage to running the rails in parallel vs series?
It really isn't close enough to be of worry and it was the only way I could run that 8AN line without putting a bunch of pressure on the barb from having a tight bend. When you look at the location from the side you can see its far enough forward its more over the compressor side. That being said, I'll check the line after some pulls when the whole bay is super hot, if the line is sketchy hot to me, I'll add a some heat shielding.

As for parallel vs series, it isn't necessary to go parallel until very high horsepower levels. In theory it will flow more fuel.

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Originally Posted by JZG View Post
EFR9180 26.5psi just shy of 750rwhp, E85. 2x 044 pumps running at 70psi base fuel pressure. 13.5v at the pumps. Genuine 044's are very hard to beat in terms of performance, reliability, life span, current draw, and cost.
What car is this? 70 PSI base fuel pressure is crazy! I'd definitely like to hear more about this setup. Bosch has moved to adding individually serialized seals to the 2017 044 boxes that you can go verify online, so it is now REALLY easy to know if you got fakes or real pumps.

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Originally Posted by Neutron View Post
Another issue with this Y setup is if you lose one pump the good pump will back feeds through the bad pump. Depending on what the fuel demands are one pump may be enough to save your motor even if it is lean but if it back feeds through the bad pump probably not.

Using a fuel log with the OEM 044 check valves may solve both potential problems.

There are tons available. Here is an example that would fit the way you currently have things routed.

Dual Bosch Fuel Pump Log Black
I'll ultimately be adding check valves to this setup, but it isn't a deal breaker for me right this moment. I'll be relying on the ECU to react to the fuel pressure loss and cut the ignition to save the motor.

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Check Valves!
Coming soon.


Headed out to drive and tune some today within the hour. Hopefully will have an update soon.

Skeese
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