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fryguy · 11-26-2014, 05:00 PM

I have a few NORS pairs of the 77-6050a heads for the 21 stud engines. The casting dates are 4-16-46 and 4-18-46 so these were cast replacements. I have a set of the 77-6050E heads on my engine right now which are the English Pilot heads.

On the Van Pelt Flathead spec page it mentions that the 77 series Cast Iron heads were a 7.5 : 1 compression. Is there any truth to that? Can anybody verify?

year Model Displacement HP Compression Compression pressure
1937 77 221.0 85 6.12 (alum heads)
7.50 (C.I. heads) 100 lbs

Fryguy

11-26-2014, 05:00 PM	#8
fryguy Member Join Date: Aug 2010 Location: Coventry, Pa Posts: 52	Re: '37 head markings? I have a few NORS pairs of the 77-6050a heads for the 21 stud engines. The casting dates are 4-16-46 and 4-18-46 so these were cast replacements. I have a set of the 77-6050E heads on my engine right now which are the English Pilot heads. On the Van Pelt Flathead spec page it mentions that the 77 series Cast Iron heads were a 7.5 : 1 compression. Is there any truth to that? Can anybody verify? year Model Displacement HP Compression Compression pressure 1937 77 221.0 85 6.12 (alum heads) 7.50 (C.I. heads) 100 lbs Fryguy Last edited by fryguy; 11-26-2014 at 05:42 PM.