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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Race Gas



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      05-19-2012, 12:34 AM   #45
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Quote:
Originally Posted by Sam335ix View Post
Thanks eyim, will try it but wouldn't map 5 suppose to take care of that (auto tune based on mods and gas etcc..)
drive safe . That tank of gas won't last lol

I'm basically only running just below 15 psi.
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      05-19-2012, 12:35 AM   #46
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drive safe . That tank of gas won't last lol
Averaging 16.7 mpg lol you ain't kidding. I wished I had bought a non xi :-(
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      05-19-2012, 01:01 AM   #47
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Originally Posted by Sam335ix View Post
Averaging 16.7 mpg lol you ain't kidding. I wished I had bought a non xi :-(
trust me the xi is prob more fun to drive
I lose too much traction ><
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      05-19-2012, 01:06 AM   #48
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trust me the xi is prob more fun to drive
I lose too much traction ><
I wished you were local se we could run vs each other... Stayed with an me head or head up to 110 and a friends n54 din and stage 2 and intake.. My dyno numbers sucked but I am keeping up head to head with others.. I should stfu and be happy :-)
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      05-19-2012, 01:31 AM   #49
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Just got back from the track.
My friend ran 12.1 @ 110.
Kind of were playing around his car and the e39 M5 as well.
Yeah........ I wasn't a part of it
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      05-19-2012, 09:16 AM   #50
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Just so you guys know that my xdrive looses traction a lot. I'm not even running race gas and I have to switch tc off
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      05-19-2012, 10:39 AM   #51
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Quote:
Originally Posted by PR3CI5N View Post
Screw race gas unless you're tracking your car. Just go buy a bottle of NOS octane booster racing formula with mmt. It'll bring your octane up 60 points. So my 91 turns into 97 and trust me it really works. Costs $14 a bottle and u add it to atleast 16 gallons of gas. So pretty much everytime u fill up. My car feels exactly the same to me when I use race gas.
what shop did you buy this from? and isn't 60 points .6... so 91.6.
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      05-19-2012, 12:10 PM   #52
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Just so you guys know that my xdrive looses traction a lot. I'm not even running race gas and I have to switch tc off
Something is wrong with my car then... I feel it's fast but with all of my mods I expected to be faster... I don't effimg get it.
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      05-19-2012, 12:13 PM   #53
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What is the reason behind not feeling the extra octane with my mods? Can't run map 7 on jb4 since its not true race gas... So map2 or map5 to let it auto tune?
That I'm not sure. Stick to map 1 or 2. Map 2 is noticeably stronger in my experience. I have an AR 4" dp, BMS Stage II, ER cp, and 93 pump and it flies.

I rarely have traction issues even goosing it in first; running a Quaife LSD, M3 subframe bushings, Rogue toe arms, and Hankook V12 size 265 rear. And I'm RWD.

You XI guys can do an LSD ... look into it. That or stickier tires. You don't have RFTs do you?
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      05-19-2012, 01:32 PM   #54
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That I'm not sure. Stick to map 1 or 2. Map 2 is noticeably stronger in my experience. I have an AR 4" dp, BMS Stage II, ER cp, and 93 pump and it flies.

I rarely have traction issues even goosing it in first; running a Quaife LSD, M3 subframe bushings, Rogue toe arms, and Hankook V12 size 265 rear. And I'm RWD.

You XI guys can do an LSD ... look into it. That or stickier tires. You don't have RFTs do you?
I don't have any traction issues at all but LSD is on my list. Just heard back from Terry and he said I can run map7 with 50/50 mix so I am going to try it out.
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      05-19-2012, 02:30 PM   #55
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So I just took it out on map 7 and instant difference. Boost gage was constantly hitting 16/17 psi and this is how I want the damn car to feel. 50/50 103 octane and 93 octane.
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      05-19-2012, 03:07 PM   #56
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No, 1 point is equal to .1 octane. So 10 points equals 1 octane. The octane booster I'm referring to increases your octane a full 60 points which equals a 6 octane increase. My CA 91 turns into 97 octane.


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Originally Posted by 335 oClock View Post
what shop did you buy this from? and isn't 60 points .6... so 91.6.
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      05-19-2012, 03:22 PM   #57
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Quote:
Originally Posted by PR3CI5N View Post
No, 1 point is equal to .1 octane. So 10 points equals 1 octane. The octane booster I'm referring to increases your octane a full 60 points which equals a 6 octane increase. My CA 91 turns into 97 octane.
where are you at in SoCal ? where can I get such an amazing time?
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      05-19-2012, 03:33 PM   #58
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Haha. I'm located in Brea up in O.C. You can get this great time at any autozone, O'rielly's etc. It's called "NOS octane booster racing formula w/ MMT". Cost $13-14. I buy a couple every time I go because they seem to run out of stock fairly quickly. Only add a bottle with a full tank though (16 gallons).


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where are you at in SoCal ? where can I get such an amazing time?
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      05-19-2012, 03:36 PM   #59
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Quote:
Originally Posted by PR3CI5N View Post
Haha. I'm located in Brea up in O.C. You can get this great time at any autozone, O'rielly's etc. It's called "NOS octane booster racing formula w/ MMT". Cost $13-14. I buy a couple every time I go because they seem to run out of stock fairly quickly. Only add a bottle with a full tank though (16 gallons).
map 2 here I come 8)
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      05-19-2012, 04:38 PM   #60
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Map 2 or 5. Both feel strong. Really depends on your mods. Good luck

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map 2 here I come 8)
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      05-19-2012, 04:43 PM   #61
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Originally Posted by BMW_Belgier View Post
Wikipedia says:

ROZ 91 = Regular
ROZ 95 = Premium
ROZ 98 = Premium plus

Is this correct?

BMW says i have to fill up at least with ROZ 95.

You can have 100 or 102 octane here at the regular gas stations (Shell, Aral,...)
Since we're quoting Wikipedia...US & Canada use AKI, which is (RON+MON)/2:

Research Octane Number (RON)
The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane.

Motor Octane Number (MON)
There is another type of octane rating, called Motor Octane Number (MON), or the aviation lean octane rating, which is a better measure of how the fuel behaves when under load, as it is determined at 900 rpm engine speed, instead of the 600 rpm for RON.[1] MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON, however there is no direct link between RON and MON. Normally, fuel specifications require both a minimum RON and a minimum MON.

Anti-Knock Index (AKI)
In most countries, including Australia and all of those in Europe, the "headline" octane rating shown on the pump is the RON, but in Canada, the United States and some other countries, like Brazil, the headline number is the average of the RON and the MON, called the Anti-Knock Index (AKI, and often written on pumps as (R+M)/2). It may also sometimes be called the Pump Octane Number (PON).

Difference between RON and AKI
Because of the 8 to 10 point difference noted above, the octane rating shown in Canada and the United States is 4 to 5 points lower than the rating shown elsewhere in the world for the same fuel. See the table in the following section for a comparison.
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      05-19-2012, 05:31 PM   #62
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Perfekt! Thanks
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      05-19-2012, 07:40 PM   #63
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Map 2 or 5. Both feel strong. Really depends on your mods. Good luck
yay

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      05-19-2012, 07:43 PM   #64
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Map7 and just feels insane now, few more runs and the car is night and day. Too bad the gas is too expensive.
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      05-20-2012, 12:33 AM   #65
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Map7 and just feels insane now, few more runs and the car is night and day. Too bad the gas is too expensive.
you need atleast a full tank of 100 octane to run that map.
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      05-20-2012, 01:35 AM   #66
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Haha yup that's it! Enjoy. LMK what you think after a few WOT's.

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yay

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