What fuel in a Forester STI in various states of tune?
Discussion
Simple question really:
Will a standard imported Forester STI (fresh off the boat) run off standard petrol?
Same question for a Litchfield one?
If not, is it something that would usually be deal with via a remap, or are there some that just have to be run religiously on an Optimax diet?
Will a standard imported Forester STI (fresh off the boat) run off standard petrol?
Same question for a Litchfield one?
If not, is it something that would usually be deal with via a remap, or are there some that just have to be run religiously on an Optimax diet?
When I got my FSTI I took it to Surrey Rolling Road with the standard map and dynoed it on VPOWER and it had a clean bill of health (no pulled timing or hesitation on WOT).
When I pull the ECU stored values I am getting IAM=1 (full advance timing applied to ignition) and little or no timing pulled with fine learning knock correction so...
I think you will be OK on VPOWER without a remap.
The odd time that I have had to run 97RON Texaco or other brand the car felt fine and although you might get slightly more fine learning knock correction IAM still =1
US Subarus have a good and bad fuel map and the ECU adjusts the ratio between them depending upon the quality. The JDM forester STI only has a single ignition map but still gradually applies the advance map on top which adds timing depending upon the fuel quality so it can handle poor fuel, you just don't want to run it on cr*p all the time.
Hope this helps!
When I pull the ECU stored values I am getting IAM=1 (full advance timing applied to ignition) and little or no timing pulled with fine learning knock correction so...
I think you will be OK on VPOWER without a remap.
The odd time that I have had to run 97RON Texaco or other brand the car felt fine and although you might get slightly more fine learning knock correction IAM still =1
US Subarus have a good and bad fuel map and the ECU adjusts the ratio between them depending upon the quality. The JDM forester STI only has a single ignition map but still gradually applies the advance map on top which adds timing depending upon the fuel quality so it can handle poor fuel, you just don't want to run it on cr*p all the time.
Hope this helps!
Gassing Station | Subaru | Top of Page | What's New | My Stuff