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Old 01-29-2002, 11:32 AM   #1
Torch
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Question Fuel Additives (eg. Octane Boost)

I am wondering if anybody with WRX’s are using any sort of Octane boost? I have heard of people using 104+ and N2O, but do they work? Has anybody had any luck with either of these?


Thanks,
Torch
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Old 01-29-2002, 12:50 PM   #2
burr101
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Quote:
I am wondering if anybody with WRX’s are using any sort of Octane boost? I have heard of people using 104+ and N2O, but do they work? Has anybody had any luck with either of these?
the only time i use octane boost is at the drag strip. I don't really use it for a preformance gain i just worry about the short bursts of speed w/ minimal time to cool down. I've never heard knock with my car but i never want to hear it either.

shaun
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Old 01-29-2002, 01:00 PM   #3
malelee21
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I've used once and could not tell the difference....
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Old 01-29-2002, 01:05 PM   #4
phxscooby101
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Well i use 1 gal of 108 octane unleaded with a tank of gas since
our gas is 91 octane i'll get about 92.3 which is fine the less
the gas mix the higher the octane. and only costs 4.75 a gal
thats cheap if those octane boosters cost 6 dollars and only
raise your gas 3 to 7 points if that. later
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Old 01-29-2002, 01:13 PM   #5
Verist
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Most octane boosters do nothing. Check out this link and this link which is even better.

Regan-
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Old 01-29-2002, 03:49 PM   #6
whitewag
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thanks for that link Verist, very informative

Last edited by whitewag; 01-29-2002 at 03:57 PM.
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Old 01-29-2002, 04:46 PM   #7
selector37
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So the octane boost only helps if your ECU is retarding your ignition timing? Does anybody have any idea how much the ignition is retarded on a stock WRX with various octane ratings? I'm in CA, which means I run 91 most of the time, and it would be great to see the difference between other people running 92 or 93.

Has anyone tried the toluene yet?
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Old 01-29-2002, 04:56 PM   #8
sponaugle
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Quote:
Originally posted by selector37
So the octane boost only helps if your ECU is retarding your ignition timing? Does anybody have any idea how much the ignition is retarded on a stock WRX with various octane ratings? I'm in CA, which means I run 91 most of the time, and it would be great to see the difference between other people running 92 or 93.

Has anyone tried the toluene yet?
I use 1 gallon of toluene in every tank, and have been for some time. The gas here in Oregon is pretty crappy, especially in the winter. 1 gallon of 114 octane Toulene with 12 gallons of 92 yields 93.7 octane. For track days, I usually run 1/2 110 unleaded race gas and 1/2 92 premium.

I have used toluene in both my Supercharged Integra as well as the wrx without any problems whatsoever. I would avoid going above 20% toluene, as the aeromatic content of the resultant mixture would be pretty high (certainly out of spec for normal gas).

-Jeff
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Old 01-29-2002, 04:58 PM   #9
mynew02
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Does retarding mean that the number will just be less than normal or does it mean that it will go into the negative numbers?

I know that's a stupid question but I was examining a recording of my car taken from a scan tool and looking at my spark advance numbers.

My numbers were commonly around +12 degrees at idle and while costing, and they peaked at +30 degrees while under full acceleration (with stage0 and unichip.) Another guy's car peaked higher at around +40 degrees under full acceleration (he also had a stage 0 but I think Shiv may have re-programmed it) and I wasn't sure if my numbers were lower because of gas or his tuning...

Not trying to steal the thread but this seemed to be on track...
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Old 01-29-2002, 06:31 PM   #10
whitewag
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just went to a few hardware stores and they don't have toluene stocked for some reason. Went to Sherwin Williams they only had 1 gallon, and it cost $9.15!! Kinda pricey, thought it was going to be around $3-5, so I'll give it a shot see if it makes any difference.
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Old 01-29-2002, 06:44 PM   #11
sponaugle
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Quote:
Originally posted by whitewag
just went to a few hardware stores and they don't have toluene stocked for some reason. Went to Sherwin Williams they only had 1 gallon, and it cost $9.15!! Kinda pricey, thought it was going to be around $3-5, so I'll give it a shot see if it makes any difference.
The only way I have seen to get the $3-5 is to buy in 20 or 55 gallons. There is a local place here in Portland (Tarr) that sells 20 gallon drums I believe..

-Jeff
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Old 01-29-2002, 06:49 PM   #12
whitewag
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I wouldn't mind paying for a 20 gallon drum, but where would I find that sells it in bulk? Any suggestions?
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Old 01-30-2002, 06:46 AM   #13
turbonutterbastard
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Here in Oz premium unleaded fuel is rated at 98 octane .I also add NF which is pushing the Ron to 100 or there abouts.
The benefit is being able to dial in significant advance , without fear of detonation - more advance more power.
The LINK of course allows the envelope to be pushed by manipulating timing , fuel and boost - for any given fuel .
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Old 01-30-2002, 02:35 PM   #14
thng
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Quote:
Originally posted by whitewag
just went to a few hardware stores and they don't have toluene stocked for some reason. Went to Sherwin Williams they only had 1 gallon, and it cost $9.15!! Kinda pricey, thought it was going to be around $3-5, so I'll give it a shot see if it makes any difference.
Be careful with that. Sometimes the can says toluene but somewhere on the label it'll say toluol. Toluol is not as good as toluene.
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Old 01-30-2002, 03:18 PM   #15
whitewag
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thng, it does say toloul on the label also.... I was wondering if there was a difference. I put it in last night and it made a huge difference. I'll have to hunt some more for this toluene
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Old 01-30-2002, 04:54 PM   #16
Verist
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Toluene is like crack.. so addictive. Weee. Whitewag, you can now send me copious amounts of money for the links

Regan-
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Old 01-30-2002, 09:07 PM   #17
z&cobb
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Quote:
Originally posted by turbonutterbastard
Here in Oz premium unleaded fuel is rated at 98 octane .I also add NF which is pushing the Ron to 100 or there abouts.
The benefit is being able to dial in significant advance , without fear of detonation - more advance more power.
The LINK of course allows the envelope to be pushed by manipulating timing , fuel and boost - for any given fuel .
In the US the gasoline Octane Number is (RON + MON}/2, and the best I can get easily is 93. Most off the shelf octane boosters here are mouse milk because they "add up to 6 to 8 Points." points are like mortage points, like 0.1 percent. There is one that is coming out in February which will say a legimate "6 to 8 RON." 6 for 93 octane and 8 for 87 octane.

With my MRT system I will be able to dial in the octane for performance based on octane. If I get stuck at "last gas for 200 miles" in Death Valley, I can set it for 86 octane, or add some octane booster and set it for a higher octane. I am going to have fun experimenting with this system.
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Old 01-30-2002, 09:32 PM   #18
ascott
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Toluene is kinda hard to find in Kentucky these days. Meth labs use it, so the paint stores have cut all bulk sales to individuals at the request of the state Police and the DEA.

However, Xylene is available. 70% 93 octane plus 30% Xylene and a half a cup of ATF gives you about 100 octane.

The AFT is for a lubricant. If you mix in Toluene, you should use some too. It keeps the additive from drying out all the rubber parts in the fuel system.
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Old 01-30-2002, 11:31 PM   #19
Jung918
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How long have you been doing this...? Seems kindof risy...
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