From:Mutt e-mail:pigstye13-A-aol.com
Subject:RE: RE: Grade of gasoline for hummer Date:Tue Aug 1 07:58:53 2017
Response to:22183
I've run cheap 87 and expensive 110 in my green racing
Hummer. The 110 smells good and runs better, but the bike
runs fine on 87, what I run the majority of the time

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My understanding is lower octane (Regular) 'explodes' as
compared to higher octane (Premium) that's 'a controlled
burn'. High performance engines are timed differently from
low compression (flat head) motors. If you're running an
expansion chamber on your bike would the still flaming
exhaust ignite the un-burned reserve in it? I'm hoping the
racing boys will jump in here and educate us all.

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Can I use 89 octane for the hammer or track
with 87 or should I use 93

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