mike0chek Posted June 23, 2018 Report Share Posted June 23, 2018 (edited) i have a 421 cub setup for pump that i want to run 110 octane (vp c12 i believe its called) here is my setup- -full drag port, small bore shearers, 35mm pwk's, vforce4's, 3 degrees advanced, 8 inch pods, 140psi compression 22cc domes, squish= 0.055, at sea level. 160 mains 48 pilots runs good on 93 oct. what size dome and compression should i be looking for?? Edited June 23, 2018 by mike0chek Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted June 25, 2018 Report Share Posted June 25, 2018 The last cub I put together was 21cc and barely burned C12 completely. We ordered another set of domes from Dave @ Noss and went to 20cc. Nice sweet spot IMO. Enough compression to light the fuel right, and not so much that it hurts RPM and over rev. Quote Link to comment Share on other sites More sharing options...
mike0chek Posted June 25, 2018 Author Report Share Posted June 25, 2018 ok thanks for the input! what was your compression with the 20'? and elevation? Quote Link to comment Share on other sites More sharing options...
mike0chek Posted June 25, 2018 Author Report Share Posted June 25, 2018 i will be contacting jeff when i can get ahold of him for his advice but curious what others found to work Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted June 26, 2018 Report Share Posted June 26, 2018 59 minutes ago, mike0chek said: ok thanks for the input! what was your compression with the 20'? and elevation? Right about 165 before break in. Bout 300asl. Quote Link to comment Share on other sites More sharing options...
mike0chek Posted July 24, 2018 Author Report Share Posted July 24, 2018 ive called jeff at fast for 2 weeks with no answer, is there a certain time of the day they take calls??? never had this problem a couple years ago Quote Link to comment Share on other sites More sharing options...
ZillaFreak Posted July 25, 2018 Report Share Posted July 25, 2018 Email him. People are working. Quote Link to comment Share on other sites More sharing options...
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