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Old 09-23-2004, 08:48 PM   #1
stang-spanker
Scooby Newbie
 
Member#: 44276
Join Date: Sep 2003
Location: Maryland
Vehicle:
2004 WRX Wagon
Java Black--COBB Stage II

Default Learning up better than learning down with AccessPORT?

Assuming perfect tunes, there is a 5HP difference between the Cobb Stage 2 91 oct map and the 93 oct map (~4 at the wheels). But, if it isn't a perfect map matched to your car--probably not since every car is different--your ECU compensates within reason.

If the 93 oct map isn't spot on for your car, and you use 93 oct gas, your car will learn down. If you run the 91 oct map, but still use 93 oct gas, your car will learn up. Seems like you will end up at the same power level, but running the 91 oct map would give you that extra cushion of safety for a bad tank of gas, etc...

I discussed this with Cobb while trying to figure out if I had detonation, and they seemed to lean towards learning up. Any thoughts?
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Old 09-26-2004, 01:56 AM   #2
jsmonet
Scooby Specialist
 
Member#: 14190
Join Date: Jan 2002
Location: so. cali
Vehicle:
2005 STi
white

Default

if you start with too agressive a map and try to learn down, you REALLY need to hope for low boost levels, COLD days, and absolutely no hills. the only way to make this totally safe is to raise the octane in your tank with an additive such as toluene.

learning up is a MUCH better choice, esp. considering there's only a 5hp or so difference.
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