Fuel type vs performance?
#1
Fuel type vs performance?
I currently run my 2007 GT on unleaded regular pump gas, but i was wondering if switching to unleaded premium pump gas is worth it. Is there a significant increase in performance and HP/Torque output or is it not worth it due to the inflation of gas prices?
#2
6th Gear Member
Unless you have an '08 Bullitt (or was it '09?), the PCM on the 4.6L S197's won't adjust to provide any gains on octane higher than 87. You need a custom tune which will provide power gains, even with 87 octane compared to the stock tune, and even more so on higher octanes. Toss a tune-required CAI in with that and you're adding more power.
BTW, a no-tune-required CAI won't gain you much either since the PCM also cannot adjust for the additional air; again needing a tune to make power from the added airflow.
BTW, a no-tune-required CAI won't gain you much either since the PCM also cannot adjust for the additional air; again needing a tune to make power from the added airflow.
#4
Just to elaborate on what the fellas have said,
A higher octane rated fuel allows you to run more timing in your tunes. When tuned properly, the gains are nice.
I've watched my SCT datalog and when I jump on mine, the timing will get as high as 40 degrees.
A higher octane rated fuel allows you to run more timing in your tunes. When tuned properly, the gains are nice.
I've watched my SCT datalog and when I jump on mine, the timing will get as high as 40 degrees.
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