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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > BM3 OTS map for 94 gas

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      05-24-2018, 09:20 PM   #1
voyagergab
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If you were to run 94 gas which here in calgary has ethanol, would you pick the 91 OTS map on 93 OTS map.
This is for stock M2 with just MPE.

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      05-24-2018, 09:34 PM   #2
eatingpizzainthef87rules
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94 Petro is great gas, I run a 13:1 compression coyote on it and the timing is very aggressive with 0 knock for pump gas and such high compression. I wish we got gas here with higher ethanol content - 10% maximum is the worst.

I tried various brands of 91 including Shell with 0 ethanol and had to dial timing WAY back.
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      05-24-2018, 09:40 PM   #3
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Quote:
Originally Posted by bovairdf87 View Post
94 Petro is great gas, I run a 13:1 compression coyote on it and the timing is very aggressive with 0 knock for pump gas and such high compression. I wish we got gas here with higher ethanol content - 10% maximum is the worst.

I tried various brands of 91 including Shell with 0 ethanol and had to dial timing WAY back.
Thanks.

Funny just recently I had issues with rough running on full tank of shell v power 91. Car is still stock.

Added 1/3 tank of husky 94 and it smoother out.

I was told that 10% ethanol is ok for fuel pump but higher numbers like 30% will gum them up.
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      05-25-2018, 12:39 PM   #4
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Quote:
Originally Posted by voyagergab View Post
If you were to run 94 gas which here in calgary has ethanol, would you pick the 91 OTS map on 93 OTS map.
This is for stock M2 with just MPE.

proTUNING Freaks
FWIW I ran the 93 OTS map and my logs were very clean on Winnipeg 94 Octane from Husky.

Your results will obviously vary considering you're further west!
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      05-25-2018, 11:02 PM   #5
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I'm running the 93 OTS map and using Petro 94 in the GTA. I will produce the first logs this weekend...but I haven't had any issues that I know of. Car pulls like stink and is loud as f@$#! Bang! Bang!
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