Octane Booster
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From: Waikele
I have a friend with a WRX that wants to race at the trace. I started a link here:
Want to race
I want to repost my first question here, might get better results.
My tank is empty now, and i want to put octane booster, and reset the ECU. I'm completly stock except for a comptech airfilter.
What are your thoughts?
Octane Booster Recommendations?
Quantity to put for? (1/4 Tank about 2.5 gal)
Want to race
I want to repost my first question here, might get better results.
My tank is empty now, and i want to put octane booster, and reset the ECU. I'm completly stock except for a comptech airfilter.
What are your thoughts?
Octane Booster Recommendations?
Quantity to put for? (1/4 Tank about 2.5 gal)
Joined: Feb 2004
Posts: 1,491
Likes: 11
From: Pensacola
The maximum octane number - where you'll actually see a benefit for this car (N/A) - is around 95-97. Above that, you won't see any measurable gains, and you may run into a high octane knock if you go too high (104-110 N/A engine).
If you're running a SC (base pulleys), you can go with up to 105 w/o any short-term problems (you really need hardened valve seats above 99 octane for extended periods of time).
You need to research the 'octane' additive that's used in the product you're considering. Some octane boosters do not raise your octane number in a way your car can benefit, and can be harmful to your cars emission control system.
Additionally, do NOT use aviation gas (avgas) because avgas generally contains lead which can really screw up your car (eg. 100 Low Lead). Find a race track or shop that offers a product like 101 street legal high octane (no lead). I have found the max octane benefit in my car by mixing 3 gallons 101 octane with approximately 10 gallons 93 octane (~95-96 effective octane).
I've found 3/4 tank (101/93), and 50/50 (101/93) provided no improvement over the 1/3 (101/93).
Basically, if you want to beat a stock WRX, just find some tight turns.
Going with 1/2 tank or slightly less will save you a lot of weight. Don't go below a 1/4 tank though because you may starve your engine of fuel in the turns - while it's working hard, and end up running lean = BAD.
Race with between 3/4 and no less than 1/3 and you'll be doing your best.
If you're running a SC (base pulleys), you can go with up to 105 w/o any short-term problems (you really need hardened valve seats above 99 octane for extended periods of time).
You need to research the 'octane' additive that's used in the product you're considering. Some octane boosters do not raise your octane number in a way your car can benefit, and can be harmful to your cars emission control system.
Additionally, do NOT use aviation gas (avgas) because avgas generally contains lead which can really screw up your car (eg. 100 Low Lead). Find a race track or shop that offers a product like 101 street legal high octane (no lead). I have found the max octane benefit in my car by mixing 3 gallons 101 octane with approximately 10 gallons 93 octane (~95-96 effective octane).
I've found 3/4 tank (101/93), and 50/50 (101/93) provided no improvement over the 1/3 (101/93).
Basically, if you want to beat a stock WRX, just find some tight turns.
Going with 1/2 tank or slightly less will save you a lot of weight. Don't go below a 1/4 tank though because you may starve your engine of fuel in the turns - while it's working hard, and end up running lean = BAD.
Race with between 3/4 and no less than 1/3 and you'll be doing your best.
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