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I called a few tuners near me and got way different answers. One said 18-19* of timing the other said 10-11*. Whats Ideal for 91oct?
 

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it depends on a lot of factors? What heads? what cams? what temperature? what A/F?
 

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The one that said 18-19* is way off...I would probably keep it around 12-13* with stock internals on 91 octane, better safe than sorry...If you up octane of course you can safely run some more timing.
 
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