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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 > Are Octane Boosters Safe?



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      02-09-2013, 06:16 PM   #1
Brent13
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Are Octane Boosters Safe?

Looks like a lot of tunes require 93 octane. Since 92 octane seems to be the highest you'll find in Oregon I'd like to find something to increase the octane and give me that little bit more insurance against detonation. Do octane boosters really work and, if they do, are they safe?
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      02-09-2013, 06:20 PM   #2
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They work pretty well but over time they'll turn your spark plugs orangish/yellow. To be honest though octane booster is old news, try a few gallons of E-85 and you'll really feel a difference.
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      02-09-2013, 08:17 PM   #3
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E85 is hard to find in alot of areas too which is a shame.
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      02-09-2013, 09:06 PM   #4
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Those off the shelf octane booster things are a scam. When they say "boosts octane 8 points" what the mean is 0.8 octane points. There is simply not enough liquid in that bottle to boost a full tank up a significant amount. All those things are is an industrial solvent such as toluene (115 octane I think). Go buy toluene from a paint store and use that instead.
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      02-10-2013, 07:00 PM   #5
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Thanks . . . guess I'll hunt down a station with E85
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      02-11-2013, 10:27 PM   #6
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the only effective octane boost i have found is Torco accelerator, which will turn 91 octane pump gas into 96 octane with ONLY 2oz per gallon, which makes it way cheaper than toluene, where you need to add something like 20oz.

Compare with most store bought, they do -1 (yes negative!) to 3 at the same concentration, and usually cost more.
Most of them dont even say what they do, only they "treat up to 16 gallons" or "more power than other boosters!!!!!!!1"

You can also reduce knock by chemically changing the air intake temp (to the cylinder) by adding 1.5oz per gallon of acetone to the fuel, letting you run a map for +1 octane over your pump gas value.

Also upper cylinder lube will reduce heat output by friction, having the same effect, but smaller. Too much UCL will result in reduction in fuel output power, I use a custom mix which is 5oz for 13 gallons of fuel, lowers engine wear/temp and provides greater power, any more and the power drops.

You can use all 3 in combination with all working together, and get a nice 95 octane blend with 1.5oz of torco and acetone, and 1/3oz of UCL for every gallon of 91 octane gas.

That being said, torco has MMT in it, and is generally used in modified cars with the cats removed, and the spark plugs changed often. All non-ethanol gas over 94 octane WILL contain MMT, the rest have at least 10% ethanol. Shell 100 octane street/race gas is something like 20-25% ethanol.

A balanced mix for high octane with the least MMT and most power output would be E85 + toluene + torco + acetone + UCL, a lot of balanced chem would need to be involved to figure out the correct combo
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      02-12-2013, 02:18 PM   #7
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Quote:
Originally Posted by BillionPa View Post
the only effective octane boost i have found is Torco accelerator, which will turn 91 octane pump gas into 96 octane with ONLY 2oz per gallon, which makes it way cheaper than toluene, where you need to add something like 20oz.

Compare with most store bought, they do -1 (yes negative!) to 3 at the same concentration, and usually cost more.
Most of them dont even say what they do, only they "treat up to 16 gallons" or "more power than other boosters!!!!!!!1"

You can also reduce knock by chemically changing the air intake temp (to the cylinder) by adding 1.5oz per gallon of acetone to the fuel, letting you run a map for +1 octane over your pump gas value.

Also upper cylinder lube will reduce heat output by friction, having the same effect, but smaller. Too much UCL will result in reduction in fuel output power, I use a custom mix which is 5oz for 13 gallons of fuel, lowers engine wear/temp and provides greater power, any more and the power drops.

You can use all 3 in combination with all working together, and get a nice 95 octane blend with 1.5oz of torco and acetone, and 1/3oz of UCL for every gallon of 91 octane gas.

That being said, torco has MMT in it, and is generally used in modified cars with the cats removed, and the spark plugs changed often. All non-ethanol gas over 94 octane WILL contain MMT, the rest have at least 10% ethanol. Shell 100 octane street/race gas is something like 20-25% ethanol.

A balanced mix for high octane with the least MMT and most power output would be E85 + toluene + torco + acetone + UCL, a lot of balanced chem would need to be involved to figure out the correct combo
yeah i heard really good reviews on Torco a lot of the corvette guys use it its pretty cheap and convenient since its hard to find e85 or 100+ octane in California
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      02-13-2013, 12:08 AM   #8
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Quote:
Originally Posted by Brent13 View Post
Thanks . . . guess I'll hunt down a station with E85
Hey bud what part of Oregon do you live in I might be able to help?
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      02-13-2013, 02:21 PM   #9
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Where I do find that torco thing?
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      02-13-2013, 03:08 PM   #10
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if i have a jb4 n55 stage 2, bms intake, and exhaust- NOTHING ELSE (no iso or anything)

how much e85 can i run and still be on the safe side?
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      02-13-2013, 10:35 PM   #11
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Quote:
Originally Posted by ronin335xi View Post
Hey bud what part of Oregon do you live in I might be able to help?
Sherwood/Wilsonville area. I think I found a dealer with E85 in Aurora (quick trip down I-5.) I also went ahead an ordered a can of the TORCO Accelerator from Amazon.
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      02-14-2013, 01:01 AM   #12
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Quote:
Originally Posted by Brent13 View Post
Sherwood/Wilsonville area. I think I found a dealer with E85 in Aurora (quick trip down I-5.) I also went ahead an ordered a can of the TORCO Accelerator from Amazon.
there JAY's garage on the SE side. 7th and morrison. Its where I go. try that place.
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      02-20-2013, 04:05 PM   #13
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Try researching the use of toluene as well as an octane booster. It's 114 octane.
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      02-23-2013, 04:05 AM   #14
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Octane booster will never go into any of my cars. I would not suggest doing it yourself.

How are you tuning your car? Are you bringing to a performance shop and letting their tuner tune the car?

If you do it yourself. I hope you have a good understanding of Air/fuel ratio's. And an A/F gauge. Not some AEM cheese gauge.
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      02-23-2013, 04:10 AM   #15
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Also! If you tune on 93 oct with oct booster( if you get that right). your tune will be off u less you plan on getting oct booster every day.

I don't think it will be worth it. Between the booster and the spark plugs you'll burn threw.
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