Quote:
Originally Posted by Jim Brierley
The first number of the serial number indicates the compression ratio. Winfield used the crows foot on the 7:1, but not on all 7:'s. It looks like the plugs are 14mm??? Early Winfield's used 18mm. He made a few in aluminum, I think only for the Super Winfield's?
|
These do look like 14mm, which would line up with other reports of the "1-__" series being 6:1 with 14mm. I saw a hi-res version of this photo and I'm 90% sure there's a serial number under the paint. Just gotta dig it out of there and you'll find the compression ratio.