Hello,
I have started my hot rod 1725, got the rebuild candidate last weekend.
The motor is a late one without the oil catchers around the spark plugs.
It has not been bored but the stock pistons had been knurled, according
to the machinist, something I had not heard of before. Ordering new
pistons is where I am having a problem. Chris Albers who has built a
small journal chevy rod engine, sent me his piston job order # from
Ross. They unfortunately no longer have a record of his purchase, and
say they have very little information on this engine. Here is what they
ask for, some of which I have figured out, I think.
Bore - 3.25
Stroke - 3.350 [with off set grind for the extra .100]
Rod length - 5.7
Desired compression ratio - 10-1 [or there about]
Block height - ? [not sure how to get this, neither is the
machinist]
Piston to deck - ? [Ross says their house standard is .017]
Cyl head cc - ? [I know this will change with porting but what is
stock]
Compressed head gasket thickness - ?
Bore diameter of head gasket - ?
They did not ask for compression height, which I think is going to be
1.725. Stock 1.85 less additional rod length and half of additional
stroke length .075+.05=.125 . I think deck height will figure into this
also. Well that is about it, I had no idea that just ordering pistons
would be so complex, and I still need to figure out which Datson valves
to cut down, a seat that will work with them, lash caps,
springs....porting, how to lighten a fly wheel... Thanks for any help
on this stuff jim
This archive was generated by hypermail 2b30 : Tue Sep 05 2000 - 08:53:02 CDT