Rippin'n'Runnin Posted February 12, 2018 Report Posted February 12, 2018 Hey guys. What size domes would be good for 93 octane on 421 driveline lp. I mix 50/50 now on stock cylinders with 20cc domes but would like to run straight 93 for long trips up north and not have to lug around race gas with me, unless it will noticeably hurt performance. Quote
Ayesully810 Posted February 12, 2018 Report Posted February 12, 2018 what elevation are you at? im around 700-1000 and 23cc domes put me at 150psi 20 cc domes had me around 180 Quote
Rippin'n'Runnin Posted February 12, 2018 Author Report Posted February 12, 2018 I live near Flint also,lol. So same as you. We're you good on 93 with the 23cc Quote
Ayesully810 Posted February 12, 2018 Report Posted February 12, 2018 Yes sir ran great on 93. I ran slp pipes on my 421. had great power down low and did good in short distance drags still. Ran like a champ till i ran it too lean on accident this past fall and had some deto in the right side. Quote
Rippin'n'Runnin Posted February 12, 2018 Author Report Posted February 12, 2018 Thanks man I'll probably go ahead and get the 23cc domes then. I'm gonna run 33pwk carbs on it. But I'm still getting parts together. I'm probably still gonna run my stock dune ported motor this summer and finish this one in the fall. Quote
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