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| Re: Connecting Rods specs? |
Subject: Re: Connecting Rods specs?
by LoserMachine on 2020/2/4 17:51:09
i thought Aseries have a 50mm main and a 45mm rod journal size?
A12 Main bearing journal diameter, 49.964 mm to 49.957 mm [1.9671" to 1.9668"]
A12 Crankpin journal diameter, 44.947 mm to 44.961 mm [1.7706" to 1.7701"]
so i did some digging Pauter P/N NIS-190-480-1364F for custom rods specs are:
C-C BE BEW SE SEW
5.3700" 136.40mm|1.8901" 48.01mm| 0.9520" 24.18mm| 0.7480" 19.00mm |0.9000" 22.86mm
i also took a look at some crower rods. i got a set of their fiat 128 rods on clearance for $150. i have access to a machine shop with a surface grinder fitted with a magnetic chuck that i plan on using for this project. so 1.00"-0.9520"=.048"=1.2192mm surface grinding ~.6mm on each side seems very possible. i am currently contacting various piston company(ross,wiseco,CP) to see if a 22.5mm compression height and 22mm pin is even possible. i think with a piston that size i may have to experiment with a 2 ring piston.
from what i know a longer rod and shorter pistons will allow me to rev faster by increasing rod to stroke ratio and allow me to run lighter pistons with a shorter skirt.
are there any down sides to using a longer rod and shorter piston? the only one i can think of is possible increased cylinder ware.
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