by LSaupe » Jun 18, 2010 7:28 am
I am running a 24 pitch, but am pulling too many R's with this old cross flow (need to get it down around 5,500).
Was running at 6200 with the 24 pitch (3/4" below and 6" setback). For me I hope 26 pitch will be perfect (havent had the time or weather to get it out there yet). I did run a 27 pitch and it was too much (5,300), and I lost some mid range punch. But, this engine is tired and I plan in upgrading a bit this summer.
So... guess it depends on your max power desired RPM. For calcs numbers I am showing about 7% slip using my tach and GPS. Not sure how accurate the tach is, but envision it is accurate to within 200 RPM or so.
I am running a 24 pitch, but am pulling too many R's with this old cross flow (need to get it down around 5,500).
Was running at 6200 with the 24 pitch (3/4" below and 6" setback). For me I hope 26 pitch will be perfect (havent had the time or weather to get it out there yet). I did run a 27 pitch and it was too much (5,300), and I lost some mid range punch. But, this engine is tired and I plan in upgrading a bit this summer.
So... guess it depends on your max power desired RPM. For calcs numbers I am showing about 7% slip using my tach and GPS. Not sure how accurate the tach is, but envision it is accurate to within 200 RPM or so.