E-85 users thread - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Crossover Auto · 11-08-2012, 04:38 AM

If you have been tuned on E85 please post for how long and how many miles.

This will be a good reference if in a few months, we start seeing failures in the cam driven high pressure fuel pump (CD HPFP).

xjohnx · 11-08-2012, 07:45 AM

Quote:

Originally Posted by Crossover Auto

This will be a good reference if in a few months, we start seeing failures in the cam driven high pressure fuel pump (CD HPFP).

any evidence to support this theory, or is this just speculation?

Crossover Auto · 11-08-2012, 04:03 PM

Yes, just look at Mazdaspeed3/6 direct injection pumps. If you have ever used E85, you know it causes some build up. Even running a regular tank of pump gas doesn't prevent it from happening.

http://www.mazdaspeedforums.org/foru...-issues-79030/

Opposed · 11-08-2012, 04:35 PM

Subscribed for this. You guys seem adamant that this will happen. I know early on people have asked this question and most of the tuners on here simply say "nope, it will cause no problems." I would like to run it come spring but I am waiting for more research.

SkullWorks · 11-08-2012, 05:21 PM

I am using E85 and have no problems, and expect none.

Anyone comparing a mazda and a BMW pump (reference the link) has not been exposed to both types of pumps, and has no idea how high the rate of Pump failure is on BMW's regardless of fuel, mileage, or driving style.

I manufacture aftermarket fuel pumps for the Mazda/Audi pumps, I have considered the BMW pumps but the design is literally horrible, and way way way too complex for the task...thankfully our HPFP's are more akin to the mazda and audi pumps but have an issue with the side-loading of the pump shaft.

It's hard to say what the factory uses for a coating in the pumps themselves, but I use a combo of coatings and hard enough material to prevent galling should there be a potential

The fact that the guy had "rebuilt" his pump recently, tells me why it failed. nick anything, scratch anything, get a speck of dirt in there, anything and that thing will die quickly....the average clearance in those pumps is .0002" (yes really less than 1/10th the thickness of your hair) the clearance there is closer than the tolerance on your average factory crank bearings.

Kochinopride · 11-08-2012, 05:32 PM

I've been running E85 for about 300 miles now. Since fuel was on Scarce mode for a while here, I'll be doing more driving in the next few days. I'll report anything odd if it occurs. I'm also going to be dropping a turbo in soon...

Dustin · 11-08-2012, 06:42 PM

How much did fuel economy decrease when switching to E85?

Kochinopride · 11-08-2012, 07:07 PM

To be honest, I haven't noticed a decrease. At least not yet. I hear it burns faster at higher RPMs and I don't pound the pedal (just snowed here). I've driven it about 300 miles and I've used up about 1/6 of a full tank.

SupraLove · 11-08-2012, 07:18 PM

I'm glad we're switching to E85. Once we run out of fossil fuels, we'll still be able to drive our cars!

SkullWorks · 11-08-2012, 08:04 PM

Quote:

Originally Posted by Kochinopride

To be honest, I haven't noticed a decrease. At least not yet. I hear it burns faster at higher RPMs and I don't pound the pedal (just snowed here). I've driven it about 300 miles and I've used up about 1/6 of a full tank.

you sir are either a troll or you can't count, you realize you just proclaimed something north of 100 miles per gallon right?

there is a basic requirement due to the chemical composition of Ethanol (the E in E85) VS gasoline that says you need ~25-30% more fuel not 1/3 the fuel as you are claiming.

I get about 140 miles to the tank or about 14 miles per gallon, but i drive...enthusiastically. and my tune is still slightly rough

(im not on a stock ECU we are running AEM series 2 on mine)

Mitch · 11-08-2012, 08:07 PM

Quote:

Originally Posted by Kochinopride

To be honest, I haven't noticed a decrease. At least not yet. I hear it burns faster at higher RPMs and I don't pound the pedal (just snowed here). I've driven it about 300 miles and I've used up about 1/6 of a full tank.

Your gas gauge is frozen. People have been having this problem with the latest rounds of tunes.

Kochinopride · 11-08-2012, 08:08 PM

believe me I'm not troll and most likely miscounted, badly. my fault.

I don't drive spiritedly - haven't gotten a chance to... I haven't sat down in my car and crunched actual mileage and numbers and all - just did some quick calculations in my head and came up with 300... pretty sure it's less now that I think about it... Thanks for doing the thorough calculation!

Kochinopride · 11-08-2012, 08:09 PM

Quote:

Originally Posted by Mitch

Your gas gauge is frozen. People have been having this problem with the latest rounds of tunes.

That COULD be a possibility, but it has moved... slightly... is there a way I can verify this? Or can it be fixed quickly if that's the case?

xjohnx · 11-08-2012, 08:21 PM

Quote:

Originally Posted by Kochinopride

That COULD be a possibility, but it has moved... slightly... is there a way I can verify this? Or can it be fixed quickly if that's the case?

I know Visconti's E85 rom replaces the MPG gauge with a number indicating what percentage of fuel is in the tank.

11-08-2012, 04:38 AM	#1
Crossover Auto Join Date: Jul 2012 Drives: FR-S, BR-Z, 86 Location: Plano, TX Posts: 231 Thanks: 37 Thanked 53 Times in 45 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	E-85 users thread If you have been tuned on E85 please post for how long and how many miles. This will be a good reference if in a few months, we start seeing failures in the cam driven high pressure fuel pump (CD HPFP).

11-08-2012, 04:35 PM	#4
Opposed Senior Member Join Date: Jun 2012 Drives: 2013 Asphalt FR-S Location: Bloomington, MN Posts: 1,156 Thanks: 499 Thanked 447 Times in 294 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	Subscribed for this. You guys seem adamant that this will happen. I know early on people have asked this question and most of the tuners on here simply say "nope, it will cause no problems." I would like to run it come spring but I am waiting for more research. __________________ Asphalt FR-S: EcuTek Visconti STG2 tune, MAPerformance turbo kit, MAPerformance 3" exhaust, Hotchkis springs, Mach-V 17x9 Awesomes. Build thread: http://www.ft86club.com/forums/showthread.php?t=30703

11-08-2012, 05:32 PM	#6
Kochinopride Senior Member Join Date: Aug 2012 Drives: 13 FR-S, 12 CLS AMG, 05 Lotus Elise Location: Edgewater, NJ Posts: 532 Thanks: 103 Thanked 143 Times in 103 Posts Mentioned: 18 Post(s) Tagged: 0 Thread(s)	I've been running E85 for about 300 miles now. Since fuel was on Scarce mode for a while here, I'll be doing more driving in the next few days. I'll report anything odd if it occurs. I'm also going to be dropping a turbo in soon... __________________ 2005 Lotus Elise 2012 Mercedes Benz CLS AMG 6.3 2013 Scion FR-S 2011 Land Rover LR4 2013 Lamborghini Gallardo LP570-4 Superleggera

11-08-2012, 07:07 PM	#8
Kochinopride Senior Member Join Date: Aug 2012 Drives: 13 FR-S, 12 CLS AMG, 05 Lotus Elise Location: Edgewater, NJ Posts: 532 Thanks: 103 Thanked 143 Times in 103 Posts Mentioned: 18 Post(s) Tagged: 0 Thread(s)	To be honest, I haven't noticed a decrease. At least not yet. I hear it burns faster at higher RPMs and I don't pound the pedal (just snowed here). I've driven it about 300 miles and I've used up about 1/6 of a full tank. __________________ 2005 Lotus Elise 2012 Mercedes Benz CLS AMG 6.3 2013 Scion FR-S 2011 Land Rover LR4 2013 Lamborghini Gallardo LP570-4 Superleggera

11-08-2012, 08:08 PM	#12
Kochinopride Senior Member Join Date: Aug 2012 Drives: 13 FR-S, 12 CLS AMG, 05 Lotus Elise Location: Edgewater, NJ Posts: 532 Thanks: 103 Thanked 143 Times in 103 Posts Mentioned: 18 Post(s) Tagged: 0 Thread(s)	believe me I'm not troll and most likely miscounted, badly. my fault. I don't drive spiritedly - haven't gotten a chance to... I haven't sat down in my car and crunched actual mileage and numbers and all - just did some quick calculations in my head and came up with 300... pretty sure it's less now that I think about it... Thanks for doing the thorough calculation! __________________ 2005 Lotus Elise 2012 Mercedes Benz CLS AMG 6.3 2013 Scion FR-S 2011 Land Rover LR4 2013 Lamborghini Gallardo LP570-4 Superleggera

11-08-2012, 04:03 PM	#3
Crossover Auto Join Date: Jul 2012 Drives: FR-S, BR-Z, 86 Location: Plano, TX Posts: 231 Thanks: 37 Thanked 53 Times in 45 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Yes, just look at Mazdaspeed3/6 direct injection pumps. If you have ever used E85, you know it causes some build up. Even running a regular tank of pump gas doesn't prevent it from happening. http://www.mazdaspeedforums.org/foru...-issues-79030/

11-08-2012, 05:21 PM	#5
SkullWorks Banned Join Date: Mar 2012 Drives: SSM LT MT BRZ Location: SoCal Posts: 1,033 Thanks: 803 Thanked 754 Times in 328 Posts Mentioned: 23 Post(s) Tagged: 1 Thread(s)	I am using E85 and have no problems, and expect none. Anyone comparing a mazda and a BMW pump (reference the link) has not been exposed to both types of pumps, and has no idea how high the rate of Pump failure is on BMW's regardless of fuel, mileage, or driving style. I manufacture aftermarket fuel pumps for the Mazda/Audi pumps, I have considered the BMW pumps but the design is literally horrible, and way way way too complex for the task...thankfully our HPFP's are more akin to the mazda and audi pumps but have an issue with the side-loading of the pump shaft. It's hard to say what the factory uses for a coating in the pumps themselves, but I use a combo of coatings and hard enough material to prevent galling should there be a potential The fact that the guy had "rebuilt" his pump recently, tells me why it failed. nick anything, scratch anything, get a speck of dirt in there, anything and that thing will die quickly....the average clearance in those pumps is .0002" (yes really less than 1/10th the thickness of your hair) the clearance there is closer than the tolerance on your average factory crank bearings.

11-08-2012, 06:42 PM	#7
Dustin Twin Screw You Join Date: Nov 2012 Drives: 2013 Supercharged Whiteout FR-S Location: Burleson, Texas Posts: 1,231 Thanks: 464 Thanked 620 Times in 332 Posts Mentioned: 37 Post(s) Tagged: 0 Thread(s)	How much did fuel economy decrease when switching to E85?

11-08-2012, 07:18 PM	#9
SupraLove Banned Join Date: Aug 2012 Drives: 2007 Toyota Camry LE, 5AT i4 Location: Alabama Posts: 141 Thanks: 173 Thanked 53 Times in 27 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I'm glad we're switching to E85. Once we run out of fossil fuels, we'll still be able to drive our cars!

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