[JasW]

Originally Posted by csu87

So much incorrect and half true facts in here.

Yes you can run 100%e85 without any fuel systems upgrades, however you will be running a pretty conservative tune as to not max out the lpfp. It's not so much the low end that you run out of fuel as it is the high end.

Yes you can also run 100% e85 with only an upgraded lpfp, but again, conservatively tuned. I made almost the same power on e60 as i do on e85, since you have to tune conservatively in order to not max out the hpfp inthe upper rpms.

I still peak around 21psi but taper to 16/17psi at 6k rpm to allow the hpfp to keep up.

Of course, every car is different though and if you want to run any kind of e85 mix, you need to continually log until it is dialed in.

On that note, and since this is a basics thread, it might be helpful to tell people what to look for in the logs. I believe 50 psi is the floor, if that's the right word, for the lpfp/fuel low pressure sensor. But what are you looking for re: the hpfp/rail pressure, and in what RPM range?

[csu87]

JB4 Logging

LPFP = FP_L you want to keep above 50
HPFP = FP_H you want to keep above 10

MHD Logging

LPFP = Fuel Low Pressure Sensor you want above 50
HPFP = Rail Pressure you want to keep above 1500

Not sure about COBB' values as Ive never used it to log before.

[Bme30]

I ran a stage one on my stock twins. It was good for e55 all day before my hpfp said no more. A stage one will be more than adequate for 90% of daily users.

Also with my stage 1 I very seldom saw pressures below 60psi running e55. My hpfp has always been my limiting factor!!!!! Even on the single setup running e40 my stage one was great. It was the high pressure dipping to below 10 (jb4).

[JasW]

Originally Posted by 924er

They recommended e50 because it's easy to mix.

That reminds me, there's an excellent E85 calculator that tells you the Exx mix based on what you're putting in and the blend of what you already have in the tank before filling up. Mobile friendly, too: http://www.intercepteft.com/calc.html

[924er]

Originally Posted by JasW

That reminds me, there's an excellent E85 calculator that tells you the Exx mix based on what you're putting in and the blend of what you already have in the tank before filling up. Mobile friendly, too: http://www.intercepteft.com/calc.html

Nice good stuff. I usually put around 5 gallons of e85 to run Cobb e30. The more the better cuz I have 91 octane only

[illuminaughty]

I could be wrong but it looks like this was done on the stock HPFP. Is this only possible because it was a glory run and not an everyday setup?

http://www.n54tech.com/forums/showthread.php?t=29669

[jippii ensio]

^meth is used for fueling

[Papa_Lion]

I should have read this before starting a thread about e60 and supporting mods. This has answered everything for me. Thanks for the info.

[ihernandez7910]

stage 1 walbro upgraded
Mhd e60 custom flash

my hpfp dips a bit into the danger zone.... pretty fucking scary!

lpfp is happy!

Have been running this setup for about 3 months now and still pulling strong!

[mike@x-ph.com]

Originally Posted by ihernandez7910

stage 1 walbro upgraded
Mhd e60 custom flash

my hpfp dips a bit into the danger zone.... pretty fucking scary!

lpfp is happy!

Have been running this setup for about 3 months now and still pulling strong!

Awesome !!

[dreyo27]

Has anyone dynoed their car on factory turbos and 100% e85? using an upgraded LPFP and port injection or Vargas upgraded shotgun kit?

[csu87]

Originally Posted by dreyo27

Has anyone dynoed their car on factory turbos and 100% e85? using an upgraded LPFP and port injection or Vargas upgraded shotgun kit?

everything else stock except lpfp and 100%e85, I dyno'd a tad over 410whp/460ish wtq.

FBO with 100% e85 dyno'd around 450whp/500wtq but a conservative tune that keeps the hpfp right at the minimum pressure. peak 21psi, taper to 17psi. I don't see gaining more than 10 or so whp though if the HPFP wasnt the limiting factor, as the stock turbos cant handle much more than where I am at.

[jgoens]

Originally Posted by csu87

everything else stock except lpfp and 100%e85, I dyno'd a tad over 410whp/460ish wtq.

FBO with 100% e85 dyno'd around 450whp/500wtq but a conservative tune that keeps the hpfp right at the minimum pressure. peak 21psi, taper to 17psi. I don't see gaining more than 10 or so whp though if the HPFP wasnt the limiting factor, as the stock turbos cant handle much more than where I am at.

Just change a lpfp and I could be 410whp? Not bad. Doesn't seem like a big gain for the FBO--I don't really want to deal with the emissions crap with DP here in CA...and for only an extra 40hp doesn't legitimize the cost. Might consider the fuel pump upgrade. Did you do a flash as well?

[Clownaround]

Anyone running a 93 Octane E10 map? 93 in my state has 10% Ethanol. Or would 10% even make a mark?

[N111CUK]

Originally Posted by jgoens

Just change a lpfp and I could be 410whp? Not bad. Doesn't seem like a big gain for the FBO--I don't really want to deal with the emissions crap with DP here in CA...and for only an extra 40hp doesn't legitimize the cost. Might consider the fuel pump upgrade. Did you do a flash as well?

Without the tune the car can't do any better with an upgraded LPFP and e85 in the tank

Hardware mods are only realised once you tune the software to make use of the new hardware. Make sense?

[csu87]

Originally Posted by Clownaround

Anyone running a 93 Octane E10 map? 93 in my state has 10% Ethanol. Or would 10% even make a mark?

everywhere has 10% ethanol. It doesnt change anything

[csu87]

Originally Posted by jgoens

Just change a lpfp and I could be 410whp? Not bad. Doesn't seem like a big gain for the FBO--I don't really want to deal with the emissions crap with DP here in CA...and for only an extra 40hp doesn't legitimize the cost. Might consider the fuel pump upgrade. Did you do a flash as well?

You'll have to do an E85 BEF with JB4. Also, not sure on how long the car will last like this since the turbos are working pretty hard with the stock DPs choking the exhaust side.

[jgoens]

Originally Posted by N111CUK

Without the tune the car can't do any better with an upgraded LPFP and e85 in the tank

Hardware mods are only realised once you tune the software to make use of the new hardware. Make sense?

I have the tune. I usually am running e30.

[dreyo27]

Originally Posted by csu87

everything else stock except lpfp and 100%e85, I dyno'd a tad over 410whp/460ish wtq.

FBO with 100% e85 dyno'd around 450whp/500wtq but a conservative tune that keeps the hpfp right at the minimum pressure. peak 21psi, taper to 17psi. I don't see gaining more than 10 or so whp though if the HPFP wasnt the limiting factor, as the stock turbos cant handle much more than where I am at.

Wow that is pretty impressive. And you are AWD? did you do a Chargepipe\bov and downpipes on that 410whp run?

Thats awesome because assuming you have AWD and 20% drivetrain loss that means you were at 492hp and 552hp at the crank?

[csu87]

Originally Posted by dreyo27

Wow that is pretty impressive. And you are AWD? did you do a Chargepipe\bov and downpipes on that 410whp run?

Thats awesome because assuming you have AWD and 20% drivetrain loss that means you were at 492hp and 552hp at the crank?

Yes chargepipe and bov. No downpipes. Yes awd. Would i recommend it for longevity, no. But I'm trying to go big top mount

[dreyo27]

Originally Posted by csu87

Yes chargepipe and bov. No downpipes. Yes awd. Would I recommend it for longevity, no. But I'm trying to go big top mount

Makes sense. Obviously when you double the boost longevity goes out the window. How high were the IAT? what did you use for the tune?

[jgoens]

Originally Posted by csu87

Yes chargepipe and bov. No downpipes. Yes awd. Would i recommend it for longevity, no. But I'm trying to go big top mount

Did you have FBO before? I always thought you had at least DP's. You had posted your HP with FBO a couple posts back...assuming you took stuff off?