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Rosko420

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Sep 19, 2020
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1981 Pontiac Grand Prix, 350 sb,vortec heads,custom cam,12:1 compression,3:73 posi,holley 650. Working on upgrading to efi.
 

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565bbchevy

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Aug 8, 2011
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Is the fuel you are currently using for your 12.1 compression going to be compatible with 02 sensors for EFI?
 

Rosko420

n00b
Sep 19, 2020
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6
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I am actually pulling motor and dumbing it down to 9.5:1 to make it compatible. Was all about high compression till drivability and lack of stations with decent fuel came into play.
 
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