From:backyard bob e-mail:somewhere-A-newjersy
Subject:RE: Grade of gasoline for hummer Date:Mon Jul 31 20:18:27 2017
Response to:22177
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.

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

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