The Ford Barn - View Single Post - 1936 Ford flathead

Brian · 10-14-2019, 12:58 AM

Lawrie gave you the correct information; your engine came from the factory with hardened valve seats in all holes, no need for additives. And yes, 91 will be fine...although I run 95 or 98 in my 35, partly as an aid in getting it to run quieter; it has 165 lbs compression and tends to want to ping a bit at certain loads/speeds.

10-14-2019, 12:58 AM	#8
Brian Senior Member Join Date: May 2010 Location: Masterton, New Zealand Posts: 3,832	Re: 1936 Ford flathead - is a fuel additive required Lawrie gave you the correct information; your engine came from the factory with hardened valve seats in all holes, no need for additives. And yes, 91 will be fine...although I run 95 or 98 in my 35, partly as an aid in getting it to run quieter; it has 165 lbs compression and tends to want to ping a bit at certain loads/speeds. __________________ Unfortunately, two half wits don't make a whole wit!