Quote:
Originally Posted by JantzenOKC
I'm talking about the LFX in stock form. I've never ran less than 93 since being boosted, as I'm tuned for 93.
A stock LFX runs fine on 87, but it pulls timing (knock reduction) to be able to do it. If you run 91 it will pull a lot less timing if any at all. Less timing = less power, more timing = more power. So yes 91 will make more power in our cars than 87 will. But not because "91 makes more power" but because 91 allows the ecm to run the timing it was designed to run. It just has the ability to instantly reduce the timing as soon as knock is detected. That way the masses can fill up with 87 and be happy.
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So a stock LFX will tune itself to 91?