Race Gas?

F

FXchris305

Member
Location
miami
Car
2005 Honda S2000
hey guys just wondering can our FXs take race gas (100 octane) or afgas (115 octane)? can our stock ecu take it ? just wondering cause i used to use it on my s2000 back then when i had it . and it ran alot harder with it . has anyone here used Race Gas or Afgas before ?
 
Ummm... Not a good idea. Maybe put a few gallons mixed with a whole tank of regular. Would not make it be the daily formula tho. I used to do that on my for probe. It ran like a champ lol

---------- Post added at 08:26 AM ---------- Previous post was at 08:20 AM ----------

..... But passed away soon after...
 
sir21 said:
Ummm... Not a good idea. Maybe put a few gallons mixed with a whole tank of regular. Would not make it be the daily formula tho. I used to do that on my for probe. It ran like a champ lol

---------- Post added at 08:26 AM ---------- Previous post was at 08:20 AM ----------

..... But passed away soon after...
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yea of course not everyday but on a day u go to the dragstrip or something .
 
Don't use race gas, your car will not benefit from it. The factory tune is based on 93 octane. The only real benefit to race gas is to run higher boost and more aggressive timing. Your car is naturally aspirated I assume so only the timing part matters. Without a tune specifically for it, you'll gain just about nothing.
 
He'll gain. But not much. In my probe the difference was quite noticable. Any how tell us how it went ;)
 
ooh alright just asking cuz i wanted to try it one of these days when i go to the track. il just use 93 octane to keep it safe and not mess up anything . i used to use it in my s2k and it did a pretty big noticable gain i thought it might do the same to the FX.
 
sir21 said:
He'll gain.
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How? I don't understand the principle behind it I guess... there is no extra "energy" or "power" to be unleashed from race gas, it's just more resistant to detonation. Because of this extra resistance a tuner is able to run more aggressive timing, you can build the motor for higher compression, you can run more boost, etc. That's where the extra power comes from.

You will still be on the same exact stock, factory map on the ECU so where can you get any more power? If anything you'll lose power because race gas is harder to ignite...
 
Frankiago said:
How? I don't understand the principle behind it I guess... there is no extra "energy" or "power" to be unleashed from race gas, it's just more resistant to detonation. Because of this extra resistance a tuner is able to run more aggressive timing, you can build the motor for higher compression, you can run more boost, etc. That's where the extra power comes from.

You will still be on the same exact stock, factory map on the ECU so where can you get any more power? If anything you'll lose power because race gas is harder to ignite...
Click to expand...


That's how I understand the issue. The power loss you mention is due to incomplete combustion. Not only are you losing power by running race gas in a NA stock motor, but you're wasting money and sending unburned fuel into your cats. Boo x3.
 
Don't forget that most race gas is leaded (at least the 115 octane). That'll mess up the cats in a hurry. And I agree that if the car isn't boosted, there can be no benefit. Unless I'm mistaken, the car won't advance timing on it's own, you'd have to tune it. The reason you lose power on 87 is because the car is pulling timing to compensate; it doesn't work the other way.
 
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