E85?
Thread Starter
Heel & Toe
Joined: Aug 2017
Posts: 16
Likes: 0
E85?
Want convert to full time e85 (no sensor) have station 1 mile from my house, have a fast 102 238/240 cam n tea ported 243 full rave exhaust want to know what’s needed pump injectors etc like to just use some gm flex fuel injectors what is everyone’s set up thanks
Melting Slicks
Joined: Jun 2006
Posts: 2,484
Likes: 261
From: Miami Florida
When I first converted to full time E85 I just filled the tank with it and went to tune it, all was enough with a cam you may need a larger capacity fuel pump but the tuner will tell you if you will need pump or injectors or both.
Later sense I was going for 550 or better wheel I got a Walbro 450 lph and 72 lbs injectors tho 60 may do.
That's all I did the rest of the fuel system is all stock.
About 2 years later the in tank fuel pressure regulator stop working so if you go in there to change fuel pump upgrade the pressure regulator as well if they make an aftermarket one.
Not wanting to drop the tank again I installed a small external pressure regulator using the schrader valve at the end of the ds fuel rail for a return style fuel system.
Later sense I was going for 550 or better wheel I got a Walbro 450 lph and 72 lbs injectors tho 60 may do.
That's all I did the rest of the fuel system is all stock.
About 2 years later the in tank fuel pressure regulator stop working so if you go in there to change fuel pump upgrade the pressure regulator as well if they make an aftermarket one.
Not wanting to drop the tank again I installed a small external pressure regulator using the schrader valve at the end of the ds fuel rail for a return style fuel system.
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,341
From: Gilbert AZ
IMO there is zero sane reason to not just spend the $100-250 on a flex fuel sensor and let it do its work. Safety, ease of use, no worries about changing fuel, can run anything from 91-e90+, etc. Just do the sensor, it is stupid cheap for what you get out of it.
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,628
With the flex fuel sensor in place, as the E rating changes, the sensor will allow the ECM to compensate for the changes in the pump fuel. Hence there is already a flex fuel tables in the ECM programming, so all that is needed it to install the sensor installed, and turn the tables on in the tune to use them during the tune.
Last edited by Dano523; Dec 22, 2017 at 09:36 AM.
Instructor
Joined: Oct 2017
Posts: 124
Likes: 13
LS9 Injectors $200
DSX Flex Fuel kit $300
Good dyno tune $500 ish
I run a little Lucas ethanol treatment to keep the system lubed. All good.
Cam, heads, headers, xpipe and intake. 499.5whp. It is a GS though so has the Z06 fuel pump.
DSX Flex Fuel kit $300
Good dyno tune $500 ish
I run a little Lucas ethanol treatment to keep the system lubed. All good.
Cam, heads, headers, xpipe and intake. 499.5whp. It is a GS though so has the Z06 fuel pump.
Last edited by JeremyAZ; Dec 25, 2017 at 10:08 PM.
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Instructor
Joined: Oct 2017
Posts: 124
Likes: 13
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,628
As stated, your going to be using 30% more fuel with E85 than petro for the same amount of power, and as for if the stock fuel pump will be able to keep up with the demands, really need to know the HP you plan achieving.
Hence with NOS, your going to be spraying both NOS, and more fuel, and depending on the HP you plan on achieving, the stock fuel pump may not be able to keep up with the demand.
And just a FYI, with NOS playing the once in blue moon thing ,it not a mater of if the engine is going to blow, but when isntead.
Hence with NOS, you create more heat, and if the piston ring gaps have not been increased, just a mater of time when the rings to to zero gap from the heat, they bind to the side of the cylinder, and snap the head off a piston isntead.
So to build a motor for NOS, you have to increase the ring gap for the upcoming heat for when on NOS, which means that when the motor is not run on NOS/subject to the increase head, your giving up power/compression instead.
Hence with NOS, your going to be spraying both NOS, and more fuel, and depending on the HP you plan on achieving, the stock fuel pump may not be able to keep up with the demand.
And just a FYI, with NOS playing the once in blue moon thing ,it not a mater of if the engine is going to blow, but when isntead.
Hence with NOS, you create more heat, and if the piston ring gaps have not been increased, just a mater of time when the rings to to zero gap from the heat, they bind to the side of the cylinder, and snap the head off a piston isntead.
So to build a motor for NOS, you have to increase the ring gap for the upcoming heat for when on NOS, which means that when the motor is not run on NOS/subject to the increase head, your giving up power/compression instead.
Instructor
Joined: Oct 2017
Posts: 124
Likes: 13
As stated, your going to be using 30% more fuel with E85 than petro for the same amount of power, and as for if the stock fuel pump will be able to keep up with the demands, really need to know the HP you plan achieving.
Hence with NOS, your going to be spraying both NOS, and more fuel, and depending on the HP you plan on achieving, the stock fuel pump may not be able to keep up with the demand.
And just a FYI, with NOS playing the once in blue moon thing ,it not a mater of if the engine is going to blow, but when isntead.
Hence with NOS, you create more heat, and if the piston ring gaps have not been increased, just a mater of time when the rings to to zero gap from the heat, they bind to the side of the cylinder, and snap the head off a piston isntead.
So to build a motor for NOS, you have to increase the ring gap for the upcoming heat for when on NOS, which means that when the motor is not run on NOS/subject to the increase head, your giving up power/compression instead.
Hence with NOS, your going to be spraying both NOS, and more fuel, and depending on the HP you plan on achieving, the stock fuel pump may not be able to keep up with the demand.
And just a FYI, with NOS playing the once in blue moon thing ,it not a mater of if the engine is going to blow, but when isntead.
Hence with NOS, you create more heat, and if the piston ring gaps have not been increased, just a mater of time when the rings to to zero gap from the heat, they bind to the side of the cylinder, and snap the head off a piston isntead.
So to build a motor for NOS, you have to increase the ring gap for the upcoming heat for when on NOS, which means that when the motor is not run on NOS/subject to the increase head, your giving up power/compression instead.
I’m afraid you are incorrect about the ethanol benefits. Yes demand is higher and YES there are HP gains. Need LS9 injectors; flex fuel kit and tune. If you have Z06 or Grandsport fuel pump it can keep up. Hence the 30whp and 15wtq gain and $1.89 a gallon for flex fuel. As for Nitrous you need a stand alone fuel system to provide for the extra fuel demand. Hence the stand alone fuel system. Pushing any motor 50% or more power then manufactured design is a risk. Spray or boost. Hopefully a good tune can prolong it.
Thread Starter
Heel & Toe
Joined: Aug 2017
Posts: 16
Likes: 0
I’ll be running heads milled to 62cc and .40 cometics and will also have to flycut wanted the benefits s more compression and e85 r the ls9 injectors good enough for h/c ls2 on e85 I can do stand alone if I do decide on spraying it just want to make sure stock pump is enough and I get enough injector
Burning Brakes
Joined: Jul 2008
Posts: 923
Likes: 37
From: Green Bay Wisconsin
You can expect an 8% gain running E85 on a naturally aspirated engine, and about 15% if you have a turbo or supercharger.
Douglas in Green Bay
Burning Brakes
Joined: Nov 2009
Posts: 1,114
Likes: 42
From: California
Just posted a comparison the other day, gotta weigh out all your options for sure 
https://www.corvetteforum.com/forums...rs-vs-e85.html
https://www.corvetteforum.com/forums...rs-vs-e85.html
Heel & Toe
Joined: Jan 2018
Posts: 16
Likes: 1
I have a 2014 c7, and want to do flex fuel kit, I have a ecs supercharger, headers, catch can, and meth kit, do i need to change the injectors? If so what's ur total price?