Tuning the Megasquirt (Pt 10.) - E85 Ultimate Guide 1

E85 or Ethanol flex fuel is basically an inexpensive race gas. If you have it in your area, you need to look into running it with your Megasquirt. In this episode we will cover why E85 helps performance and can add power safely, how it's different than gasoline, and the best way to convert your tune to run it in Tuner Studio and Megasquirt. We cover ALL the screens and settings in this video!

Time Codes:
00:00 Overview
01:09 E85 basics, energy density, some chemistry lol
02:45 Atomization vs Vaporization
03:00 Cooling properties, flame speed, vapor pressure
03:43 Supporting Mods
04:20 Approach for tuning and configuration
05:30 AFR & Lambda explained for real
07:06 Config Section
08:02 Getting Started
09:04 Level 1 - Fuel VE
10:12 Level 2 - Req Fuel Calculation
13:03 Level 3 - Using the Fuel Multiplier %
15:22 Level 4 - OEM style - Using a Flex Fuel Sensor
16:24 All about the 4 VE tables
17:28 Exporting and Importing VE tables and Multi table setup
20:14 Use Fuel Multiplier + VE 1 and VE 3
22:11 The Blending Curve (Flex Blending)
23:49 BOSS Mode - Control EVERYTHING (table switching)
27:44 Winning at E85, the full summary of the best way to do it

Next time we will put it all into practice and do the steps live in the car, handling troubleshooting, retuning so you know exactly how everything works. So stay tuned!

OGPedxing is all about DIY, gadgets, and tools.

Some links may be for my affiliate pages which earn the channel a tiny amount if you click through. It's an easy and free way to support the channel and helps me bring more content to you! I greatly appreciate it!

See my recommended tools and parts here (all stuff I use personally):

[igorrusu]

I do not usually comment but this is the best playlist tutorial i came across!! I got my car dyno tuned on e85 recently and was having some issues afterwards. Now i have a more in depth knowledge on how everything works and feel comfortable messing around with the settings. Great job on the whole playlist!

[mlfishing]

Very interesting watch mate! :) Thanks Ped

[Samiyr]

Great video, I'm not going to lie your videos are the reason that I upgraded my MS2 to an MS3X. Love the videos and the easy to follow layout. Still looking for the part 2 to this video.

[vodkanelle]

i really am lucky to have stumbled upon your vids

[milleun]

Incredible work, thank you so much. As a French speaker you are clear and easy to understand.

[howardhutchinson]

Absolutely educational. The tenor, visual aids, and bullet point of views, was quite instructional. This is tantamount to a tutorial. Thanks man.

[eboat]

doing first start soon on long time project car and im running e85. thanks alot for this info

[boostedchevy]

Great videos thank you. I have a question. I am running an ms3 goldbox and enabled flex fuel as per the video. However, it doesn't seem to be automatically adjusting. It's reading the percentage and idles fine, but as soon as I try and give a liitle throttle it goes way lean. Any suggestions? Thank you.

[cwh]

Big fan of your videos. They are easy to follow and very helpful.

I have one question that I believe I know the answer to, but wanted to check. My car is constant e85, no switching back and forth. Fuel is tsted at each fill and ethanol added to make straight 85 if needed. I changed the required fuel to 9.8 stoich. Do i also need to multiply the VE table by 1.38? Or do I only do 1 or the other?

Thank you.

[morganfreeman]

I wish i had an MS3 because it really opens up so much possibilities. For now I'll have to do with my budget and ms2x. Great info anyways, thanks !

[robmespeedy]

I wish this guy was my auto shop instructor 👨‍🏫
Why am I limited with MSPNP2 ? 15:15

[John-rwbv]

This was an everything-you-need-to-know that actually contained everything-i-needed-to-know, you're a legend mate cheers! Would a lot of this also apply to an LPG conversion? LPG is a mix of propane and butane. I'm not sure if you can buy a sensor that detects the % of each, but if you could...?

[deanstevenson]

EAT 85..Street is Neat...and Korn is Sweet. Thnks

[norb]

If you set the setback multiplier to 100% on sensor fault when running e85 it will fault to a too lean condition I would set it to 140% bit safer Stoich of E10 is 14.10 not 14.6:)

[natetheocles]

Your videos are awesome man. How did you get started with your quest to becoming a tuner?

[matthewmoilanen]

Not to contradict but Alcohol burns slower and less "explosively" than gas. But it burns longer so and applies less combustion pressure but for a longer period of time to effectively apply more total pressure to the crank through the piston and rod. This is why alcohol makes more power and is less destructive to internal engine parts. As a side note on alcohol dirt mods we find that typically we don't or shouldn't add more timing as it doesn't add any power. The longer burn time on the power stroke seems to be the big benifit and using that up by advancing timing won't provide any advantage.

[GoBrokeOffroad]

Enjoy watching your videos and trying new stuff in tuner studio. Do you think you could drive an external pwm through the tacho wire? Just to turn it on/off?

[jmpcrx]

Hi, thanks for all your videos, have been going through them... Ive nearly finished a turbo conversion on my mk2 mx5 and was wondering if you might give me a quick bit of advice 😁😁.. I'm in the UK and the government has recently changed most of the fuel over here from e5 (5% ethenol) to e10 (10% ethenol). This apparently could cause some problems for the fuel systems on older cars like mine. I have a new ms3 mini. I will get it mapped by a tuner soonish and was hoping to take advantage of the extra ethanol in the new e10 fuel. (I can still buy e5, but it is 99octane and very very expensive). But was wondering what parts of the fuel system I would have to replace to make it more reliable? Just any rubber hoses? Or do you know of any more internal hard to reach parts that could fail? I'm guessing it would be the same parts that you would have to change when using e85..?
Thanks 👍👍

[mielsen]

Awesome video! Wouldn't running on e85 cause a lot higher cylinder (peak) pressures because it burns faster and you'll add spark advance? Isn't that the weak spot for a stock (miata) engine where it would bend your rods? Thanks for anyone clearing that up :)

[eboat]

any idea why i have ve value of 70 in idle? seems high. i have all settings correct for injectors. deadtime, size, required fuel. i have 2000cc engine 940cc injectors 4x, fuel press ia correcr and e85 as fuel. im bit lost here