Race gas - can stock ECU take any advantage?

mmiller2002 · 04-30-2009, 01:34 PM

If I was to try some of the 100 octane gas available at the track this weekend, would the stock ECU be able to recognize this and adjust for any better perfromance? Thanks

I'm still a newbie

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JavaBot · 04-30-2009, 01:37 PM

Good Q I want to know too, should prob be ok it will burn HOT though be careful... dunno if the ecu will recognize

van_dutch · 04-30-2009, 01:39 PM

No. The ECU cannot sense and then add in timing to adjust for it properly.

bigolrig · 04-30-2009, 01:43 PM

Quote:

Originally Posted by msesno

Good Q I want to know too, should prob be ok it will burn HOT though be careful... dunno if the ecu will recognize

It won't run hot.
Higher the octane means the harder it is to burn,hence with race gas (cam2,Q16,etc..) you can get more power. This is because you can advance the timing,and run more boost before knock.
So without a tune you are basically throwing out your money.

JavaBot · 04-30-2009, 01:46 PM

is stock wrx tuned for 93?

Speedette · 04-30-2009, 01:53 PM

Stock ECU will advance timing to benefit from up to 95 octane. Any higher is a waste. And no, you won't notice a difference.

I'm assuming you live near Kennedale?

the suicidal eggroll · 04-30-2009, 01:56 PM

You could add a little to make sure you're not getting any knock and pulling timing. Ideally you would do this a few days before the track and reset your ECU to clear the FLKC table and give the car some time to bring IAM back up. Other than raising the octane a bit to clear out any knock, no it won't help.

bigolrig · 04-30-2009, 01:58 PM

To speedette, you would have to do an ecu reset first, even after that it most likely wouldn't make much of a difference . There is nothing on our cars that can read the octane of the fuel in the tank.
Like what eggroll said basically

Speedette · 04-30-2009, 02:04 PM

Quote:

Originally Posted by bigolrig

To speedette, you would have to do an ecu reset first, even after that it most likely wouldn't make much of a difference . There is nothing on our cars that can read the octane of the fuel in the tank.
Like what eggroll said basically

I suggest you read what I said again. Esp the last part.

04-30-2009, 01:34 PM	#1
mmiller2002 Scooby Specialist Member#: 159286 Join Date: Sep 2007 Chapter/Region: TXIC Location: Fort Worth, TX Vehicle: 2002 WRX Wagon,Com-C RCE wgn sprngs/Konis/H6	Race gas - can stock ECU take any advantage? If I was to try some of the 100 octane gas available at the track this weekend, would the stock ECU be able to recognize this and adjust for any better perfromance? Thanks I'm still a newbie * Registered users of the site do not see these ads.

04-30-2009, 01:39 PM	#3
van_dutch Scooby Specialist Member#: 198633 Join Date: Dec 2008 Chapter/Region: NESIC Location: MA Vehicle: 2004 WRX Black	No. The ECU cannot sense and then add in timing to adjust for it properly. Last edited by van_dutch; 04-30-2009 at 01:59 PM. Reason: some researching

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04-30-2009, 01:37 PM	#2
JavaBot Scooby Guru Member#: 156723 Join Date: Aug 2007 Chapter/Region: Tri-State Location: Illadelph Vehicle: 17 2.5i foz dgm rip wrx/rs/2.5i/foz1	Good Q I want to know too, should prob be ok it will burn HOT though be careful... dunno if the ecu will recognize

04-30-2009, 01:46 PM	#5
JavaBot Scooby Guru Member#: 156723 Join Date: Aug 2007 Chapter/Region: Tri-State Location: Illadelph Vehicle: 17 2.5i foz dgm rip wrx/rs/2.5i/foz1	is stock wrx tuned for 93?

04-30-2009, 01:53 PM	#6
Speedette Scooby Newbie Member#: 104272 Join Date: Jan 2006 Chapter/Region: MAIC Location: Centreville, VA Vehicle: 2002 WRX ClubWRX Ambassador	Stock ECU will advance timing to benefit from up to 95 octane. Any higher is a waste. And no, you won't notice a difference. I'm assuming you live near Kennedale?

04-30-2009, 01:56 PM	#7
the suicidal eggroll Scooby Guru Member#: 51961 Join Date: Jan 2004 Chapter/Region: RMIC Location: Broomfield, CO Vehicle: 2005 STi 2012 WRX	You could add a little to make sure you're not getting any knock and pulling timing. Ideally you would do this a few days before the track and reset your ECU to clear the FLKC table and give the car some time to bring IAM back up. Other than raising the octane a bit to clear out any knock, no it won't help.

04-30-2009, 01:58 PM	#8
bigolrig Scooby Specialist Member#: 185347 Join Date: Jul 2008 Chapter/Region: MWSOC Location: Lexington, OH Vehicle: 2002 EVO3 bugeye wag EG33 Swapped 2 dr RS	To speedette, you would have to do an ecu reset first, even after that it most likely wouldn't make much of a difference . There is nothing on our cars that can read the octane of the fuel in the tank. Like what eggroll said basically