TTFS Dual Fuel Pump Upgrade for N55

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Xer0449

Corporal
Jan 30, 2017
174
This is what I was told.
Makes the most sense I guess. They’re telling me that the 35% pump should be enough for full e85 on a PS2. Does that sound right?

My car right now nose dives rail pressure to 900psi on a single gallon of E.

Also, I hate California gas.
 

VACust

Corporal
Dec 1, 2016
112
US - Utah
Makes the most sense I guess. They’re telling me that the 35% pump should be enough for full e85 on a PS2. Does that sound right?

My car right now nose dives rail pressure to 900psi on a single gallon of E.

Also, I hate California gas.
Sounds about right. I’m running a SpeedTech kit with an EFR 8374 and we are going to see what the 60 pump will make with the fuels I listed. Are you mixing E98 or E85 pump?
 

Xer0449

Corporal
Jan 30, 2017
174
Sounds about right. I’m running a SpeedTech kit with an EFR 8374 and we are going to see what the 60 pump will make with the fuels I listed. Are you mixing E98 or E85 pump?
I'm actually mixing pump E80 and 91ACN.
 

VACust

Corporal
Dec 1, 2016
112
US - Utah
I'm actually mixing pump E80 and 91ACN.
I’m mixing E98 with 91. I have read a few S55 guys that were running full E85 thought they were running out of injector at high RPM. Since N55 and S55 injectors are the same I’m wondering what we will see. The E85 S55 cars were making 550 wheel on stock fuel systems with boost tapering from 21psi to something like 17psi. Personally I don’t think you need to run more than E50.
 

VACust

Corporal
Dec 1, 2016
112
US - Utah
I’m mixing E98 with 91. I have read a few S55 guys that were running full E85 thought they were running out of injector at high RPM. Since N55 and S55 injectors are the same I’m wondering what we will see. The E85 S55 cars were making 550 wheel on stock fuel systems with boost tapering from 21psi to something like 17psi. Personally I don’t think you need to run more than E50.
I think some have made a little more power since I last researched S55 on E85. Haven’t really read much in the last few months about it. I think mid 600+ should be attainable on E50 or high octane fuels. Maybe even more.
 

Xer0449

Corporal
Jan 30, 2017
174
x
I’m mixing E98 with 91. I have read a few S55 guys that were running full E85 thought they were running out of injector at high RPM. Since N55 and S55 injectors are the same I’m wondering what we will see. The E85 S55 cars were making 550 wheel on stock fuel systems with boost tapering from 21psi to something like 17psi. Personally I don’t think you need to run more than E50.
Running out of injector at DI is pretty impressive in itself. I'll prob stick around E50 as well. It'll be nice to pair it up with the inevitable N55 flex-fuel kit.
 

VACust

Corporal
Dec 1, 2016
112
US - Utah
x


Running out of injector at DI is pretty impressive in itself. I'll prob stick around E50 as well. It'll be nice to pair it up with the inevitable N55 flex-fuel kit.
I’ve also read and had conversations with others that think the injectors are fine for way more power. The problems they were having was high RPM and running E85. I know there are a couple F8x cars out there running way more than 550 wheel DI only with E50 or 100+ fuels. I’m sure one of the next things we will see for sale after these HPFP upgrades will be injectors.
 

Xer0449

Corporal
Jan 30, 2017
174
@VACust have you been able to put your pump in? I don’t think Ken has what he needs yet.

@TuningTechFS are we going to be able to run these single HPFP pumps on late e-series 9e60b ROM, or is it up in the air?
 

VACust

Corporal
Dec 1, 2016
112
US - Utah
@VACust have you been able to put your pump in? I don’t think Ken has what he needs yet.

@TuningTechFS are we going to be able to run these single HPFP pumps on late e-series 9e60b ROM, or is it up in the air?
I had to go to Hawaii for work and added a few days to the trip so I won’t be doing anything to it for at least another week. I did talk to Ken in an email last Monday after I landed and he was adding the tables to my ROM verosion that night. My HPFP is supposed to be waiting for me when I get home. I’ll post if/when I hear anything.
 

scrllock

Corporal
Dec 17, 2018
220
Just heard from my local perf shop that XDI is looking for distributors for a new n54-style hpfp. Add that to the list of options coming "soon" I guess.
 
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Reactions: Torgus and KevinC39

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