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Octane Boost additive?

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Old Aug 16, 2007 | 08:59 PM
  #21  
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Originally Posted by rws.1
Octane surpresses igniton or detonation.
You want a higher octane fuel with higher compression to supress the tendency to pre-detonate.
You will not make extra horsepower with extra octane unless your car is tuned to advance the timing with that extra octane.

the lowest octane you can run without detonation or retard will make the most power.

BTW Octane boosters in bottle are worthless anyway. (except Torco)
An 8 point actually equals .8
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Old Aug 16, 2007 | 09:16 PM
  #22  
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Originally Posted by RickSnow
My 89 pings under load when hot using 91 octane....but does not ping if I add Octane boost.......any thoughts.....
The knock sensor listens for ping at a range the humon ear cannot hear. Are you hearing the engine stumble? If so have you tried 93 octane or what is the timing at? The timing might be to much.
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Old Aug 17, 2007 | 02:11 AM
  #23  
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Originally Posted by SurfnSun
the lowest octane you can run without detonation or retard will make the most power.
This is the best answer. Higher octane fuel is actually LESS efficient, which is why it resists detonation/pre-ignition.
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