[Solid67]

Trying to figure out how to properly calculate an e30 blend so I can run the BM3 Stg 1 e30 OTS. BMW states that the m240i has a 13.5-gallon tank, but the other day when I ran my car to empty (dashboard said 3 miles to empty) and filled it up, it was 12.5 gallons.

I know e30 means 70 (93) / 30 (e85) blend but how many gallons of e85 would I need to put in before filling up the rest with 93?

Also, do I need to gap my spark plugs for e30?

[SoCalCarGuy]

http://www.georgebelton.com/E85Calculator.php

.020-.022 gap

[Antec800]

The miles left on tank isn’t 100 accurate when it shows 0 you usually have a little less then the gallon, and the miles left on tank changes on how you drive also

[Mkswoosh]

I'm assuming it's better to have a little more than less ethanol when trying to reach that e30 calculation?

[Solid67]

Originally Posted by Mkswoosh

I'm assuming it's better to have a little more than less ethanol when trying to reach that e30 calculation?

Yes from some additional research it would be better to be over (E31-E33) then under (E29 or less).

[Solid67]

Fellas I am going to try the stg 1 e30 ots map tonight with stock spark plugs and only other mod is the xHP stage 2 transmission flash. My only question is how do I go back to 93. Do I just run the tank until empty then fill up with 93 and flash back?

[Mkswoosh]

Originally Posted by Solid67

Yes from some additional research it would be better to be over (E31-E33) then under (E29 or less).

Appreciate that! I think I've read somewhere on stock fuel pumps bmw recommends no more the e20. Is that true? I figured if I'm not consistently running e30 100% of the time. Probably twice a month 5 gallon mixtures each time itll be okay.

[Pablo M]

I have m240 in my dash board read 20miles for empty i add 3.5 gallon e85 and the rest 93. 🚀

[Solid67]

Originally Posted by Pablo M

I have m240 in my dash board read 20miles for empty i add 3.5 gallon e85 and the rest 93. 🚀

Are you having any issues? When i tried the e85 calculator it showed it needed about 4-4.5 gallon of e85 then the rest 93.

[Pablo M]

Originally Posted by Solid67

Are you having any issues? When i tried the e85 calculator it showed it needed about 4-4.5 gallon of e85 then the rest 93.

Any issue i run 12.00 sec 117 mph

[Pablo M]

Myabe not run exact e30 but the feeling its a bullet

[Pablo M]

Originally Posted by Pablo M

Any issue i run 12.00 sec 117 mph

And race track distance is 25 miles not flat street and have mountain to arrive to tace track any issue

[Mkswoosh]

E30 really make a huge difference to it being compared to rocket? Damn. I'm excited to try it out now

[Solid67]

Fellas ran stg 1 e30 ots 2.0 and holy shit did the car become a rocket. Had my two cousins with me in the car and I didnt expect it to pull as hard as it did. Crazy story but I got pulled over for doing 78 in a 55, but earlier i was doing 100 then did a pull up to 140, so got really lucky he clocked me at 78. The cop was real cool and let me off the hook (literally handed me my license, insurance card, and registration) and told me to slow it down.

My damn Dragy was dead, but I was able to get one datalog for the night.

Model: B58
Stage: 1 OTS
Version: 2.0
Octane Map: e30
Brand-Octane Fuel Used: Mobil e85 + Mobil 93
Link: http://www.bootmod3.net/log?id=5d296b08ae729b026c8774ab
Observations: No throttle closure - fast as shit
Mods: BM3, xHP Stage 2 Transmission Flash - everything else stock

Car felt freaking awesome, like a rocket. Can't wait to go e30 stg 2. I don't think I will be going back to 93 now that I'm on the corn train!!!

[RF30A]

I usually let the car get down to about a quarter tank and then I know I can put 11 total gallons in (340i). So, I may not have a completely full tank when filling but I know my ratio is correct.

I also use the calculator posted above.

[Solid67]

Fellas got some performance metrics for stg 1 e30 ots.

[msk340i]

Do I have to gap the spark plugs to run e30?

[4DOOR_E90]

Originally Posted by SoCalCarGuy

http://www.georgebelton.com/E85Calculator.php

.020-.022 gap

Originally Posted by SoCalCarGuy

http://www.georgebelton.com/E85Calculator.php

.020-.022 gap

Can you run without the gapping without any misfires ?

[pauli18c]

Originally Posted by Mkswoosh

Appreciate that! I think I've read somewhere on stock fuel pumps bmw recommends no more the e20. Is that true?

Are you guys running E30 OTS stg1 on stock fuel pumps?

[Solid67]

Originally Posted by F36_GC

Can you run without the gapping without any misfires ?

Yes, you can. I was running stock plugs on Stg 1 and 2 E30 OTS with all supporting mods and really didnt have any issues. I upgraded my spark plugs anyway to NGK 94201 and had them gapped to .022 because I will be running a meth or port injection kit sometime soon. I have ordered a JB4 and will use it along with BM3 (BEF).

Originally Posted by pauli18c

Are you guys running E30 OTS stg1 on stock fuel pumps?

I've run Stg 1 and Stg 2 on the stock fuel pump with no issues. You will only start having issues I believe once you go above E40 and then again its all based on your tune and goals. I believe you can run straight E85 but you would have to limit boost/load a lot or you will crash the HPFP, so really not worth it.