100 unleaded vs 110 leaded...?

Malaka1 · 02-04-2010, 12:22 PM

I am going to the track tonight and was wondering which would be best to use 100 unleaded or 110 leaded?

HPFREAK · 02-04-2010, 12:24 PM

DO NOT RUN LEADED

BAD JUJU for 02 equiped cars and cats.

Malaka1 · 02-04-2010, 12:37 PM

Well I do not have any cats, and do I really need 02 sensors if the Proceed uses 02 sim logic?

HPFREAK · 02-04-2010, 12:40 PM

Ya just avoid the leaded gas it is not great to use and not necessary if you have 100 near you, but if you have no cats and dont care about your 02's then you can try it but I would always avoid using leaded.

jpsimon · 02-04-2010, 12:47 PM

just find some unleaded 104 and call it a day

GeorgiaTech335coupe · 02-04-2010, 01:04 PM

I'm pretty sure the leaded gas will screw up your O2 sensors and make your car run like crap, even if you are using an O2 sim. The O2 sim is dividing the voltage of the signal from the O2 sensors to keep it within tolerance, but if that original signal is messed up then it won't be effective. I could be wrong though, as I am not 100% about that.

Sniz · 02-04-2010, 01:17 PM

dont run leaded, already been said....just dont do it.

run as close to 100% race gas as possible and you'll be fine.

ianthegreat · 02-04-2010, 01:24 PM

I've done it.. no ill side effects. Car ran great. Wouldn't do it regularly.

Can gum up your injectors and cover your sensors.

Malaka1 · 02-04-2010, 03:56 PM

Should I lower the rear tire pressure at all?

Darkcyd_Turbo · 02-04-2010, 04:02 PM

Quote:

Originally Posted by Brad@PSI MOTORS

DO NOT RUN LEADED

BAD JUJU for 02 equiped cars and cats.

Brad totally made me

!

+1

Sniz · 02-04-2010, 04:04 PM

Quote:

Originally Posted by Malaka1

Should I lower the rear tire pressure at all?

yes, are you on runflats or good tires?

Malaka1 · 02-04-2010, 05:15 PM

Generals...

Just waiting for the tread to finish on these, have a new set of RE050A Pole Positions ready to go on.

GeorgiaTech335coupe · 02-04-2010, 05:19 PM

I wouldn't go lower than 25-26 psi on street tires. That's just my opinion.

jpsimon · 02-04-2010, 05:27 PM

Quote:

Originally Posted by Malaka1

Generals...

Just waiting for the tread to finish on these, have a new set of RE050A Pole Positions ready to go on.

don't wait! get rid of the generals

OpenFlash · 02-04-2010, 05:28 PM

In a pinch (ie, tank not empty) leaded gas is okay for use, ONCE in a while. A day at the track here and there wont harm your o2 sensors. Just don't make a habit of it. Our o2 sensors are sensitive enough

And don't forget to datalog!

shiv

shockin330i · 07-08-2010, 12:48 AM

Just wondering what one should air down RFT to? 25psi?

Jonny550 · 07-08-2010, 11:02 AM

Quote:

Originally Posted by shockin330i

Just wondering what one should air down RFT to? 25psi?

Wouldnt make a difference, the sidwalls on the RFT are like a rock so 40 psi and 25 psi really make no difference. The softer the sidewall the more you get that wrinkle effect witch makes the car hook up better.

dzenno · 07-08-2010, 12:49 PM

Here's personal experience:

your o2 sensors will be fine if you run it a few times (not a FULL tank of it) but say 2-3 gallons for dyno or 1/4 mile runs...

HOWEVER, IN MY CASE, it has damaged fuel injectors TWICE out of TWO times I ran it so I will definitely not run it again...

Vicko · 07-08-2010, 08:07 PM

Ive mixed 1/4 93 + 5 gallos of c16 (it makes 1/2 tank) for street rallys. Like Shiv said, Once in a While...
So far, no side efects, but lots of fun!...

Irishace · 07-08-2010, 08:11 PM

MS109 4tehwinz

02-04-2010, 12:22 PM	#1
Malaka1 General 104 Rep 919 Posts Drives: F30 335i 6MT Black Join Date: Jun 2009 Location: Clearwater, FL iTrader: (6)	100 unleaded vs 110 leaded...? I am going to the track tonight and was wondering which would be best to use 100 unleaded or 110 leaded?
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02-04-2010, 12:24 PM	#2
HPFREAK Lieutenant Colonel 63 Rep 1,884 Posts Drives: C6 ZO6 Join Date: Sep 2009 Location: Socal iTrader: (8)	DO NOT RUN LEADED BAD JUJU for 02 equiped cars and cats. __________________ My Youtube Channel
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02-04-2010, 12:37 PM	#3
Malaka1 General 104 Rep 919 Posts Drives: F30 335i 6MT Black Join Date: Jun 2009 Location: Clearwater, FL iTrader: (6)	Well I do not have any cats, and do I really need 02 sensors if the Proceed uses 02 sim logic?
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02-04-2010, 12:40 PM	#4
HPFREAK Lieutenant Colonel 63 Rep 1,884 Posts Drives: C6 ZO6 Join Date: Sep 2009 Location: Socal iTrader: (8)	Ya just avoid the leaded gas it is not great to use and not necessary if you have 100 near you, but if you have no cats and dont care about your 02's then you can try it but I would always avoid using leaded. __________________ My Youtube Channel
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02-04-2010, 12:47 PM	#5
jpsimon Team Zissou 3077 Rep 10,198 Posts Drives: 2022 AWD M3 Comp - SMB Join Date: Dec 2006 Location: CT iTrader: (7)	just find some unleaded 104 and call it a day
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02-04-2010, 01:04 PM	#6
GeorgiaTech335coupe Lieutenant Colonel 76 Rep 1,883 Posts Drives: Black BMW 335i coupe Join Date: Mar 2007 Location: USA iTrader: (0)	I'm pretty sure the leaded gas will screw up your O2 sensors and make your car run like crap, even if you are using an O2 sim. The O2 sim is dividing the voltage of the signal from the O2 sensors to keep it within tolerance, but if that original signal is messed up then it won't be effective. I could be wrong though, as I am not 100% about that. __________________ 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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02-04-2010, 01:17 PM	#7
Sniz Lieutenant General 658 Rep 10,587 Posts Drives: e92 335 - gone // e36 M3 turbo Join Date: Mar 2007 Location: Ellicott City, MD iTrader: (1)	dont run leaded, already been said....just dont do it. run as close to 100% race gas as possible and you'll be fine. __________________
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02-04-2010, 01:24 PM	#8
ianthegreat Colonel 60 Rep 2,314 Posts Drives: n54 Join Date: Apr 2008 Location: Pittsburgh/Houston iTrader: (1)	I've done it.. no ill side effects. Car ran great. Wouldn't do it regularly. Can gum up your injectors and cover your sensors.
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02-04-2010, 03:56 PM	#9
Malaka1 General 104 Rep 919 Posts Drives: F30 335i 6MT Black Join Date: Jun 2009 Location: Clearwater, FL iTrader: (6)	Should I lower the rear tire pressure at all?
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02-04-2010, 05:15 PM	#12
Malaka1 General 104 Rep 919 Posts Drives: F30 335i 6MT Black Join Date: Jun 2009 Location: Clearwater, FL iTrader: (6)	Generals... Just waiting for the tread to finish on these, have a new set of RE050A Pole Positions ready to go on.
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02-04-2010, 05:19 PM	#13
GeorgiaTech335coupe Lieutenant Colonel 76 Rep 1,883 Posts Drives: Black BMW 335i coupe Join Date: Mar 2007 Location: USA iTrader: (0)	I wouldn't go lower than 25-26 psi on street tires. That's just my opinion. __________________ 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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02-04-2010, 05:28 PM	#15
OpenFlash 1737 Rep 17,960 Posts Drives: A Lot Join Date: Sep 2006 Location: SF Bay, CA iTrader: (0) Garage List 2018 Ducati Panigal ... [0.00] 2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00]	In a pinch (ie, tank not empty) leaded gas is okay for use, ONCE in a while. A day at the track here and there wont harm your o2 sensors. Just don't make a habit of it. Our o2 sensors are sensitive enough And don't forget to datalog! shiv
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07-08-2010, 12:48 AM	#16
shockin330i Brigadier General 798 Rep 4,784 Posts Drives: 2016 ZCP M3 Join Date: Jan 2007 Location: f y'all, I'm from Texas (RGV) iTrader: (1)	Just wondering what one should air down RFT to? 25psi? __________________ ERnie 2016 BSM/f80/ZCP
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07-08-2010, 12:49 PM	#18
dzenno Banned 273 Rep 5,876 Posts Drives: Join Date: Feb 2006 iTrader: (1)	Here's personal experience: your o2 sensors will be fine if you run it a few times (not a FULL tank of it) but say 2-3 gallons for dyno or 1/4 mile runs... HOWEVER, IN MY CASE, it has damaged fuel injectors TWICE out of TWO times I ran it so I will definitely not run it again...
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07-08-2010, 08:07 PM	#19
Vicko Private First Class 3 Rep 183 Posts Drives: 335i coupe 6mt Join Date: Mar 2007 Location: San Juan,PR iTrader: (0)	C16 Ive mixed 1/4 93 + 5 gallos of c16 (it makes 1/2 tank) for street rallys. Like Shiv said, Once in a While... So far, no side efects, but lots of fun!...
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07-08-2010, 08:11 PM	#20
Irishace ElevenPointFive 326 Rep 2,450 Posts Drives: E90 335 Join Date: Oct 2009 Location: Toronto iTrader: (1)	MS109 4tehwinz __________________ 2008 E90 335xi - N54 Daily Driver MHD Stage 2+ ~ CPE DPs ~ BMS Intake ~ AMS FMIC
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