Absolutely not. A 55 stick 235 motor has 7.5:1 compression ratio. Feed that motor regular gas. I have a 261 with giant size lumps on forged pistons and that motor runs on premium, not race gas, not AV gas, no supplements. So you will be fine feeding your nice little 235 motor regular!
Last edited by Dragsix; 02/08/2021 11:09 PM.
