The Ford Barn

38 coupe · 02-23-2015, 10:56 PM

While we are on the budget is not a consideration, theoretical max power flathead subject, I have a question. Why don't any of the flathead Bonneville racers use a destroked 337 Lincoln motor in the flathead class (max 325 cubes)? Bigger ports, bigger intake valves, bigger main bearings, factory forged crank, huge oil pump volume, larger valve lifter diameter, etc. It looks to me like you could get a bit more power from one of these than out of a stretched to the limit Ford motor.

I know these things are heavy (I've got one), and a lot of parts would have to be custom made, but so what? Bonneville cars get weight added, and custom made parts is the norm for Bonneville flatheads. So why not the big Lincoln?

02-23-2015, 10:56 PM	#16
38 coupe Senior Member Join Date: May 2010 Location: South Texas Posts: 2,137	Re: A Flathead in Engine Masters? While we are on the budget is not a consideration, theoretical max power flathead subject, I have a question. Why don't any of the flathead Bonneville racers use a destroked 337 Lincoln motor in the flathead class (max 325 cubes)? Bigger ports, bigger intake valves, bigger main bearings, factory forged crank, huge oil pump volume, larger valve lifter diameter, etc. It looks to me like you could get a bit more power from one of these than out of a stretched to the limit Ford motor. I know these things are heavy (I've got one), and a lot of parts would have to be custom made, but so what? Bonneville cars get weight added, and custom made parts is the norm for Bonneville flatheads. So why not the big Lincoln?