E-85 tune, does it require a new fuel pump? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Tal · 09-30-2015, 03:53 PM

Hey guys, tomorrow i'm going to go get my E-85 tune. The tuner suggested that I get a new fuel pump. Is this a good idea?

ka-t_240 · 09-30-2015, 04:03 PM

No need unless your car is boosted and requires larger port injectors.

Many of us have been running E85 on the factory fuel system for a long time!

Tectoniic · 09-30-2015, 04:35 PM

Very vague question without giving some more info on your car and the mods you have

kch · 09-30-2015, 05:20 PM

Quote:

Originally Posted by Tal

Hey guys, tomorrow i'm going to go get my E-85 tune. The tuner suggested that I get a new fuel pump. Is this a good idea?

As others have said, you're fine to run E85 with the stock fuel pump if you're NA. However, if you've got some sort of FI, then you might need to consider a fuel pump and injectors.

Illuminaughty · 09-30-2015, 05:28 PM

Boosted or NA? I don't believe in solving problems that you don't yet know exist, especially when you can introduce new ones along the way. I'm (lightly) boosted running 7PSI on E85 and I can still peg the AFR (lambda) down to 11.0 at WOT. Entirely stock fueling system.

I'd ask your tuner why he thinks you need a new fuel pump. Seems like a rather blind assumption unless you're going for big power right off the bat.

OkieSnuffBox · 09-30-2015, 07:23 PM

No, just like everyone on the FB page told you.

trigger happy · 09-30-2015, 08:19 PM

nope

Zendeta · 10-02-2015, 02:48 AM

How much of a difference is running an E85/Flex fuel kit. Exactly what soft of gains are we looking at?

steve99 · 10-02-2015, 03:39 AM

Quote:

Originally Posted by Zendeta

How much of a difference is running an E85/Flex fuel kit. Exactly what soft of gains are we looking at?

have a read of the Basic bolt on mods guide below.

you can get about 20 hp gain on a stock car with E85 and dedicated E85 tune.

Flex fuel kit/tune does give more power its just allows you to switch seamlessly between E85 and petrol or any mix in between.

dedicated E85 or petrol tunes you need to run tank down then fill with other fuel and re-flash ecu were talking naturally aspirated here. Boosted is different story

Fastbrew · 10-02-2015, 04:03 AM

So - I am on E85 flex/AVO. I only changed the injectors to FIC880s. No pump. At 10.5PSI boost on E85, I get 350WHP. When I ran 92 at 12PSI boost - I was getting around 283WHP.
Two things you don't need to get this HP - a new fuel pump or a full 3" exhaust. 2.5" up front is fine.

09-30-2015, 04:35 PM	#3
Tectoniic #FiftyShadesOfBlue Join Date: Apr 2015 Drives: 2015 FR-S Location: Chicago Posts: 1,195 Thanks: 2,086 Thanked 1,425 Times in 730 Posts Mentioned: 13 Post(s) Tagged: 4 Thread(s)	Very vague question without giving some more info on your car and the mods you have __________________ Engine/Exhaust: OFT w/ E85 Tune \| FT86SF Catted UEL \| Invidia Q300 Catback Wheels/Tires/Suspension: Avid.1 AV-20 18x8.5 +33 w/ 245/35/18 PSS \| RCE Yellow Springs \| Velox LCAs Cosmetic: Valenti FT86SF Special Edition Tails \| Diode Dynamics Full HID/LEDs \| BRZ Fender Garnishes

09-30-2015, 08:19 PM	#7
trigger happy Bang Bang Join Date: Oct 2013 Drives: 2013 Raven FR-S Location: louisville, ky Posts: 216 Thanks: 334 Thanked 61 Times in 45 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	nope __________________ Raven 6MT//Injen CAI//VDS UEL//Invidia N1//OFT//ST Coilovers

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Fuel Pump, tune	woode	Forced Induction	5	12-31-2013 12:07 PM
Fuel pump	sw20kosh	Engine, Exhaust, Transmission	1	12-10-2013 11:21 PM
Visconti Tune STG 1 Pump Gas Help	Cal3000	Engine, Exhaust, Transmission	7	05-05-2013 09:36 PM
Car fuel pump on...	Genomaxter	Engine, Exhaust, Transmission	5	11-29-2012 11:06 AM
Dynosty FR-S/BRZ Fuel System Upgrades! Deatschwerks DW65C Fuel Pump	Dustin@Dynosty	Engine, Exhaust, Bolt-Ons	3	08-21-2012 05:53 PM

09-30-2015, 04:03 PM	#2
ka-t_240 Senior Member Join Date: May 2014 Drives: BRZ Location: Fargo, ND Posts: 973 Thanks: 124 Thanked 328 Times in 237 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	No need unless your car is boosted and requires larger port injectors. Many of us have been running E85 on the factory fuel system for a long time!

09-30-2015, 05:28 PM	#5
Illuminaughty Member Join Date: Dec 2014 Drives: 2013 Subaru BRZ Limited 6MT Location: South Florida Posts: 50 Thanks: 22 Thanked 26 Times in 17 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Boosted or NA? I don't believe in solving problems that you don't yet know exist, especially when you can introduce new ones along the way. I'm (lightly) boosted running 7PSI on E85 and I can still peg the AFR (lambda) down to 11.0 at WOT. Entirely stock fueling system. I'd ask your tuner why he thinks you need a new fuel pump. Seems like a rather blind assumption unless you're going for big power right off the bat.

09-30-2015, 07:23 PM	#6
OkieSnuffBox Senior Member Join Date: Aug 2014 Drives: '23 BRZ Limited Location: OKC, OK Posts: 2,089 Thanks: 683 Thanked 1,337 Times in 761 Posts Mentioned: 9 Post(s) Tagged: 1 Thread(s)	No, just like everyone on the FB page told you.

10-02-2015, 02:48 AM	#8
Zendeta Junior Member Join Date: Jul 2015 Drives: FRS Location: Arizona Posts: 6 Thanks: 0 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	How much of a difference is running an E85/Flex fuel kit. Exactly what soft of gains are we looking at?

10-02-2015, 04:03 AM	#10
Fastbrew Senior Member Join Date: Apr 2014 Drives: 2014 Pearl White BRZ Location: USA Posts: 764 Thanks: 123 Thanked 461 Times in 233 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	So - I am on E85 flex/AVO. I only changed the injectors to FIC880s. No pump. At 10.5PSI boost on E85, I get 350WHP. When I ran 92 at 12PSI boost - I was getting around 283WHP. Two things you don't need to get this HP - a new fuel pump or a full 3" exhaust. 2.5" up front is fine.

User Name		Remember Me?
Password