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Discussion in 'Manton Push Rods Top Alcohol Tech Questions' started by Dale H., Jul 10, 2017.
Has anyone noticed having to jet richer when switching from VP alcohol to Sunoco?
Dale, as Daryl as I know they should still require the same jetting if pure alcohol. If they didn't then then wouldn't pass a NHRA fuel test. Switching from VP M1 to VP M5 will require a jet change because of the added oxidizer.
On two different cars I have tuned, looking back through my notes, almost the same amount of jet increase (around 25 numbers on the main) to achieve the same performance. It seems like I remember watching some NHRA Pro coverage, when pro stock changed gasoline brands that they had to run a different mixture.
Gasoline is very different because of additives added. Methanol is meant to be 100% pure with no additives so should not be any difference from one brand to another.