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Tuning a Carbureted Street Rod Engine Part 1 of 2

 
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Gasoline Reference Tuning Chart, Sunoco to Rockett Brand Gasoline

By: Tim Wusz

Sunoco Product / S.G.    Rockett Brand / S.G.      Tuning Suggestions

 

Standard / 0.725            111 / 0.726                            No change

Supreme / 0.715            114 / 0.727        Lean mixture by 1.0%, approx. 1 jet size

 

Maximal / 0.700             118 / 0.704                            No change

 

GT 100 / 0.760              100 / 0.744       Enrich mixture by 1.0%, approx. 1 jet size

(Unleaded)                    (Unleaded)

 

GT Plus / 0.735              100 / 0.744                           No change

(Unleaded)                     (Unleaded)

Note: A change in a Holley jet size by 0.001" results in a mixture change of 2.4%

WHEN IN DOUBT, GO RICHER

 

 
 
 
 
 
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