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Old 09-01-2021, 03:37 AM
1QwkSport2.5r's Avatar
Join Date: Oct 2006
Location: Cottage Grove, MN
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When doing the pinch test, you want to see a change in RPM pretty quickly. If you don’t, you’re too rich. Too lean and you’ll hear an RPM drop pretty quickly. Slight rise in RPM is just right. anything else is too rich.

You can use high nitro in high compression engines, you just need to adjust for it with the glow plug. A lot of people use high nitro and hot plugs and compensate for this by running too rich. I see this in trucks and buggies all too often. Correct oil ratios come into play here a little bit as well.
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Zabriel (09-01-2021)