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Messages - amcchevy1

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Briggs Flathead / Re: 22ci vs 25ci vs 28ci bore stroke and rods?
« on: June 20, 2007, 10:59:27 am »
what i have found is that the 25" has a crank with a 1 5/16 throw. and the 28" has a throw of 1 17/32. the throw is from centerline to max arc. so stroke should be twice that.
  you can put your model # of each engine in your search bar on internet and it will find a pdf file for your engine with all parts and parts #'s. do the same with the part # and you should find more info about it. like the crankshaft.

737
Briggs Flathead / Re: heads
« on: June 20, 2007, 10:45:25 am »
i put an 11hp head on my 12 1/2hp, i also had the head cut .020". you can see a noticable difference in chamber size between the two. i am building a 12 now and i am gonna set the head on without a gasket, check clearance on valve lift and then cut from there. the machine shop i deal with said you can cut as much as you want, he has gone as much as .060" on some heads.

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anything