[mawzi]

Hi, I'm wondering what other people have gone with when getting a custom tune in Canada?

I have the option of 91 or 93 octane, and I'm getting conflicting opinions. Can't decide.

How much more power will the 93 give me? Is it really noticeable?

I have 335is FBO, N54, stock inlets.

[The Geezer]

Power gains between 91-94 octane are approx 2-3%

[mawzi]

Originally Posted by The Geezer

Power gains between 91-94 octane are approx 2-3%

Are you saying that a custom 94 map will only produce 2-3% more power than a custom 91 map? Is that from experience?

[The Geezer]

I am running F.B.O with custom stage 2 tune using 94 so that part is experience.

As for the 2-3% gain, that just based on what I have read, which is what I add the word "approx"

[mawzi]

Originally Posted by The Geezer

I am running F.B.O with custom stage 2 tune using 94 so that part is experience.

As for the 2-3% gain, that just based on what I have read, which is what I add the word "approx"

Thank you. Where do you fill up for 94?

I was reading these threads and they threw me off. It seems that there's 33 whp difference on the dyno between 91 and 93.

https://www.n54tech.com/forums/showthread.php?t=39837
https://www.n54tech.com/forums/showthread.php?t=40013

[The Geezer]

Petro Canada has 94

Hope the links I sent you help out more.

[fredcase]

What province?

[mawzi]

Originally Posted by fredcase

What province?

The Toronto province

[Donutz]

I went with 91, although I running an OTS tune. While I have plenty of 94 around me, and you can almost always find it in the city, I didn't want to risk being away from the city and not being able to find 94.

[mawzi]

Originally Posted by Donutz

I went with 91, although I running an OTS tune. While I have plenty of 94 around me, and you can almost always find it in the city, I didn't want to risk being away from the city and not being able to find 94.

Exactly what I'm thinking too. I usually fill up at Costco too. Highest they have is 91.

Did you dyno your car? I'll be happy with 390whp, but that might be a stretch on 91.

[Donutz]

Originally Posted by mawzi

Exactly what I'm thinking too. I usually fill up at Costco too. Highest they have is 91.

Did you dyno your car? I'll be happy with 390whp, but that might be a stretch on 91.

I've never had this car on a dyno, so not sure what I'm making. A friend is running a custom 94 tune on his fbo N54 and he made 397hp 442 tq during his tuning session.

[mawzi]

Originally Posted by Donutz

I've never had this car on a dyno, so not sure what I'm making. A friend is running a custom 94 tune on his fbo N54 and he made 397hp 442 tq during his tuning session.

That's actually pretty good. Does it actually feel faster than yours?

[Donutz]

Originally Posted by mawzi

That's actually pretty good. Does it actually feel faster than yours?

Can't say for sure. I don't have much time in his car on the street. Spent a couple hours at Mosport and it definitely felt quick.

[The Geezer]

Originally Posted by Donutz

I went with 91, although I running an OTS tune. While I have plenty of 94 around me, and you can almost always find it in the city, I didn't want to risk being away from the city and not being able to find 94.

Yes this can be a issue if your needing to run 94, but I carry a can of Boostane Octane Booster, for those "Oh $h!t" moments.

[Silent9n54]

both 91 and 93 in canada are pretty shit... i doubt you will see any difference between them... there is really no reason to use cheaper gas in your BMW. thats what civics are for, use the best gas there is, period.

Its been tested that canadian chev 94 is worse than Us 92 oct.

If you want power go for E85 and tune for that.. when you dont have E85 you can just go back to your gas pump tune and not worry.

[shuotong]

The refinery only supplies 87 and 91, the 89 is a blend of 87 and 91 and petrol 94 is a blend of 91 and ethanol. Fuel at Costco, CDN tire and Shell to get 0% ethanol fuel, use octane booster if you need.
You will not damage the engine if you tune it to 94, the car is way too smart it will adjust the timing to accommodate whatever fuel you put in (other than diesel).

[Silent9n54]

Originally Posted by shuotong

The refinery only supplies 87 and 91, the 89 is a blend of 87 and 91 and petrol 94 is a blend of 91 and ethanol. Fuel at Costco, CDN tire and Shell to get 0% ethanol fuel, use octane booster if you need.
You will not damage the engine if you tune it to 94, the car is way too smart it will adjust the timing to accommodate whatever fuel you put in (other than diesel).

our 94 chevron gas has ZERO ethanol and still its worse than US 92

[shuotong]

Originally Posted by shanker604

our 94 chevron gas has ZERO ethanol and still its worse than US 92

True, and 93-94 is only available near big cities, in the rural area there's only 91.
Cut off the catalytic converters and try some leaded fuel.

[fredcase]

I can get barrels of e85 or e98 in Alberta. I have seen pails of e85 on kijiji in ontario.

I usually grab a barrel of e98 a year. 5L per tank, with husky 94 base fuel allows me to run JB4 race map 7, and race bef with no timing pulls.