gunnin4elvis Posted May 18, 2018 Report Posted May 18, 2018 Looking for advice on where to start with my new build. 421 cub, drag port, .5 3 squish, 135 lb each side, 19 CC domes, thousand foot elevation. 6in K&N pods with outerwears, Lectron 38/40 HVs, Trinity stage 4 intakes, VF4 reeds. R2 pipes. Should I run 93 octane? Or add a booster? Where should I start with timing? Quote
Ayesully810 Posted May 18, 2018 Report Posted May 18, 2018 (edited) 135? sounds low for that setup. you know the port timings? feel like 19cc should put you a little higher than that. thats pump gas range you doing the compression test right with a quality tester? Edited May 18, 2018 by Ayesully810 Quote
gunnin4elvis Posted May 19, 2018 Author Report Posted May 19, 2018 I thought that sounded low also. Doing the comp test with the only tester I've got. I may have to find someone with another one because I thought that sounded low. Quote
Ayesully810 Posted May 19, 2018 Report Posted May 19, 2018 race fuel is 165 170 range. throttle wide open and kick until the needle stops. I have a decent tester, you dont need a craftsman but something good and make sure the tester adapter that screws in is the SAME length as the spark plug or you will get a different reading Quote
trickedcarbine Posted May 19, 2018 Report Posted May 19, 2018 A cub with 19CC domes should be much higher then that unless the exhaust port has been enlarged to the size of your fist. What's your elevation like? Quote
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