Racing Fuel (100 octane) in 335i

PINOY_E90 · 01-25-2009, 07:51 PM

Guys,

Is it ok to put 100 octane fuel in 335 once in a while if i want to have more power/fun? I am really curious how it will behave running 100 octane... fyi mine is stock...

any infor will be appreciated...

Thanks

theplayer · 01-25-2009, 07:52 PM

Your car will explode!

aut0sh0cker · 01-25-2009, 07:55 PM

your car will enjoy it! if you really want more power just get a JB3/V3

TedRoc · 01-25-2009, 08:08 PM

Not sure... Let us know!

clickclickboom · 01-25-2009, 08:37 PM

If you have no way of increasing boost or timing, nothing different will happen.

captainaudio · 01-25-2009, 08:40 PM

Quote:

Originally Posted by clickclickboom

If you have no way of increasing boost or timing, nothing different will happen.

Using higher octane gas than the car is designed for will not harm anything but it will not give you a performance advantage.

CA

Deda · 01-26-2009, 02:33 AM

if you want more power buy M3! dont mess with octane numbers.

BMW MotorSport · 01-26-2009, 03:07 AM

Quote:

Originally Posted by captainaudio

Using higher octane gas than the car is designed for will not harm anything but it will not give you a performance advantage.

CA

+1 agree, no gains.

exo-ak-dk · 01-26-2009, 07:17 AM

+15 HP/30 TQ!!!!!

vegasspeed · 01-26-2009, 12:47 PM

It does nothing. Get a book on turbo charging. It will answer a lot of these questions. Everytime you change boost you have to alter fuel enrichment, engine timing and cooling of the engine. I all you do is one of the 3 it doesn't give you anything helpful. The car must be programed for it.

Sniz · 01-26-2009, 12:50 PM

Quote:

Originally Posted by Deda

if you want more power buy M3! dont mess with octane numbers.

lawdude · 01-26-2009, 12:50 PM

Make sure it's unleaded.

GeorgiaTech335coupe · 01-26-2009, 03:08 PM

It won't hurt your engine and will give you a little more power. If you are stock, then it won't be much, but the ecu should add a little timing especially at high rpms. 100 octane gave me about .5 mph in my 1/4 mi runs.

Mr. 5 · 01-26-2009, 03:14 PM

Quote:

Originally Posted by lawdude

Make sure it's unleaded.

This is the only rule that you should follow.
I will be running 105 this Friday and it won't hurt anything.
Leaded gas will destroy your cats!!

GeorgiaTech335coupe · 01-26-2009, 03:16 PM

Quote:

Originally Posted by Mr. 5

This is the only rule that you should follow.
I will be running 105 this Friday and it won't hurt anything.
Leaded gas will destroy your cats!!

Some tuners say a diluted mix of leaded is ok. 50/50 at least, not that I'm willing to try it.

Sniz · 01-26-2009, 03:29 PM

more concerned about your o2 sensors w/ the leaded fuel.

I have no cats.

Mr. 5 · 01-26-2009, 04:06 PM

Quote:

Originally Posted by Sniz

more concerned about your o2 sensors w/ the leaded fuel.

I have no cats.

It will take some time before the 02 sensors go, but the cats is a for sure deal.

Quote:

Originally Posted by GeorgiaTech335coupe

Some tuners say a diluted mix of leaded is ok. 50/50 at least, not that I'm willing to try it.

Yeesh. Yah, you can try it. I wouldn't trust leadded fuel with any sort of cat.

vegasspeed · 01-26-2009, 04:07 PM

I say even with a Dinan tune it doesn't give you that much help. Procede and others actually have a seperate map for running race fuel. Those maps get the very most out of the race fuel with timing, fuel delivery and engine cooling.

ducati955 · 09-11-2011, 07:19 AM

old thread, but since its been a while, this causes no harm at all? but really only helps w a tune?

is it good to run once in a while to "clean" the car a little? or am i just making crap up?

thanks guys

MalM3 · 09-11-2011, 09:01 AM

it wont "clean" anything so much, but it will make the ecu adjust

this will take time, but will reflect in your mpg

this will also revert (in time) when you change back to your regular octane value

the power gains are real, but minimal. and this depends greatly on the condition of the engine and exhaust on the whole

but , id do it

cwn23 · 09-11-2011, 09:08 AM

Putting race gas on a stock car will give minimal gains, but adding race gas to a modded car will give you the results you are looking for

ErvGotti · 09-11-2011, 09:20 AM

Quote:

Originally Posted by ducati955

old thread, but since its been a while, this causes no harm at all? but really only helps w a tune?

is it good to run once in a while to "clean" the car a little? or am i just making crap up?

thanks guys

A waste of money unless you are increasing boost. BMW designed these engines to run on 91oct with peak performance on 93oct with the stock tune. Anything above 93 and you might pick up 5hp with better timing. If you want to clean the fuel system a little just throw in some Techron or BG 44k in the fuel tank.

01-25-2009, 07:51 PM	#1
PINOY_E90 Second Lieutenant 56 Rep 209 Posts Drives: 2008 E90 335i Join Date: Dec 2006 Location: Peachtree City, GA iTrader: (0)	Racing Fuel (100 octane) in 335i Guys, Is it ok to put 100 octane fuel in 335 once in a while if i want to have more power/fun? I am really curious how it will behave running 100 octane... fyi mine is stock... any infor will be appreciated... Thanks __________________ 2008 E90 335i Jet Black, Black Leatherette, Aluminum, Automatic, Paddle, Sport Package, Ipod/USB, Formula One Pinnacle Tint 35%, Depo Blackline, M3 reps front bumper, Black Gloss Grille, Matte Black M359, V1
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01-25-2009, 07:52 PM	#2
theplayer Private 20 Rep 83 Posts Drives: 3-series Join Date: Jan 2009 Location: Los Angeles iTrader: (0)	Your car will explode!
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01-25-2009, 07:55 PM	#3
aut0sh0cker meh 123 Rep 1,756 Posts Drives: E92 335i, 997.2 C4S Join Date: Jan 2008 Location: 91362 iTrader: (2)	your car will enjoy it! if you really want more power just get a JB3/V3
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01-25-2009, 08:08 PM	#4
TedRoc Private First Class 102 Rep 140 Posts Drives: 2021 M850i Gran Coupe Join Date: Jan 2009 Location: Columbus, Ohio iTrader: (1)	Not sure... Let us know! __________________ 2021 M850i Gran Coupe Mineral White Sold Cars- 2018 M3 F80 ZCP Yas Marina / 2017 M3 F80 ZCP/ 2014 435i Sport Silver / 2009 335i E90 LCI AW / 2005 535i Silver / 2002 323ci Black Dinan Stage 3
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01-25-2009, 08:37 PM	#5
clickclickboom Private First Class 78 Rep 164 Posts Drives: Rust Bucket Join Date: Oct 2008 Location: PA iTrader: (0)	If you have no way of increasing boost or timing, nothing different will happen.
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01-26-2009, 02:33 AM	#7
Deda Major General 564 Rep 7,034 Posts Drives: BMW M5 comp Join Date: Apr 2008 Location: Croatia iTrader: (0)	if you want more power buy M3! dont mess with octane numbers.
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01-26-2009, 07:17 AM	#9
exo-ak-dk Black Magic Wheels - BMW 36 Rep 1,090 Posts Drives: E90 Join Date: Aug 2007 Location: Denmark iTrader: (0)	+15 HP/30 TQ!!!!!
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01-26-2009, 12:47 PM	#10
vegasspeed Captain 80 Rep 761 Posts Drives: 335i 6MT coupe Montego Blue Join Date: Apr 2008 Location: Las Vegas iTrader: (1)	It does nothing. Get a book on turbo charging. It will answer a lot of these questions. Everytime you change boost you have to alter fuel enrichment, engine timing and cooling of the engine. I all you do is one of the 3 it doesn't give you anything helpful. The car must be programed for it. __________________ 335i coupe Montego Blue Dinan stage 3 tune, Advan RS wheels 350whp/365wtq 1994 Brooklands Green Acura NSX Comptech Supercharged 390whp/300wtq
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01-26-2009, 12:50 PM	#12
lawdude Colonel 93 Rep 2,339 Posts Drives: 335i ZPP ZSP TiAg MT Join Date: Jul 2006 Location: Georgia iTrader: (1)	Make sure it's unleaded. __________________ What do I know? I'm insane.
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01-26-2009, 03:08 PM	#13
GeorgiaTech335coupe Lieutenant Colonel 76 Rep 1,883 Posts Drives: Black BMW 335i coupe Join Date: Mar 2007 Location: USA iTrader: (0)	It won't hurt your engine and will give you a little more power. If you are stock, then it won't be much, but the ecu should add a little timing especially at high rpms. 100 octane gave me about .5 mph in my 1/4 mi runs. __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(e90post.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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01-26-2009, 03:29 PM	#16
Sniz Lieutenant General 654 Rep 10,587 Posts Drives: e92 335 - gone // e36 M3 turbo Join Date: Mar 2007 Location: Ellicott City, MD iTrader: (1)	more concerned about your o2 sensors w/ the leaded fuel. I have no cats. __________________
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01-26-2009, 04:07 PM	#18
vegasspeed Captain 80 Rep 761 Posts Drives: 335i 6MT coupe Montego Blue Join Date: Apr 2008 Location: Las Vegas iTrader: (1)	I say even with a Dinan tune it doesn't give you that much help. Procede and others actually have a seperate map for running race fuel. Those maps get the very most out of the race fuel with timing, fuel delivery and engine cooling. __________________ 335i coupe Montego Blue Dinan stage 3 tune, Advan RS wheels 350whp/365wtq 1994 Brooklands Green Acura NSX Comptech Supercharged 390whp/300wtq
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09-11-2011, 07:19 AM	#19
ducati955 Lieutenant Colonel 90 Rep 1,717 Posts Drives: lifted tacoma on 38's & ducati Join Date: Sep 2006 Location: long island ny iTrader: (2) Garage List 2007 BMW 335i [10.00]	old thread, but since its been a while, this causes no harm at all? but really only helps w a tune? is it good to run once in a while to "clean" the car a little? or am i just making crap up? thanks guys __________________ car totaled out !!AW335i, oem aero lip, m3 csl rims, oem m3 sides, vorst csl carbon trunk, tinted, lowered on H&R sport, AR DP's, Bastauck dual exhaust, BMS intake, etc NEW RIDE white GTR!
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09-11-2011, 09:01 AM	#20
MalM3 4 pot warrior 37 Rep 1,307 Posts Drives: E90 318I Join Date: Apr 2009 Location: DENMARK iTrader: (1) Garage List 2006 e90 [10.00]	it wont "clean" anything so much, but it will make the ecu adjust this will take time, but will reflect in your mpg this will also revert (in time) when you change back to your regular octane value the power gains are real, but minimal. and this depends greatly on the condition of the engine and exhaust on the whole but , id do it __________________ Been there, done that, wanna do it again
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09-11-2011, 09:08 AM	#21
cwn23 Major 23 Rep 1,142 Posts Drives: E92 Join Date: May 2007 Location: USA iTrader: (0)	Putting race gas on a stock car will give minimal gains, but adding race gas to a modded car will give you the results you are looking for
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