hi everyone.
stripped my 430 down and am about to start rebuilding. ive taken measurements of the bottom end as follows (with a mic and a cmm btw so im confident in the accuracy)
crankpin bearing journal
#1= 2.2421
#2= 2.2413
#3= 2.2390
#4= 2.2390
#4= 2.2425
#5= 2.2394
#6= 2.2394
#7= 2.2394
#8= 2.2402
if i go for the next sixe up +.01 this would push these out of tolerance .. am i better sticking with std ?
main bearing
#1= 3.2409
#2= 3.2417
#3= 3.2411
#4= 3.2402
=5= 3.2402
again a +.01 will push these out of tollerance
and finally the piston bores
#1= 4.1913
#2= 4.1920
#3= 4.1921
#3= 4.1914
#4= 4.1917
#5= 4.1917
#6= 4.1913
#7= 4.1915
#8= 4.1894
which i believe will be good with std rings.
engine will be going in a show vehicle which will do <5,000 miles a year ...
can someone help me in deciding if im better moving to a +.01 or.... as the engine will not be pushed hard or do many miles just rebuild with stock bearings ?
any and all help and wisdom apreciated...
Oli Bigfinger
.
There's nothing in the rule book that says all sizes must be exact. Look for odd marking characters on the caps. Some cranks are all over the place.
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