x2 on the 50/50 mix with non ethanol.
As stated previously about the need to richen the jetting due to the LEAN ethanol blended Fuel. This is especially true on 1972 model GM's which leaned the jetting out in order to cut emissions, for example with the LT1 the primary jetting went from a 70 1971 to a 68 primary in 1972.
With a leaner fuel PLUS leaner jets you really get lean on the mixture which also makes the engine run hotter.
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~JAG~
NCRS#65120
68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car
#21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built.
71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist.
NUMEROUS Lemans blue Camaros,
Monza Red and Daytona Yellow Corvettes
& a Chevelle or two...
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