Connecting rod clearance

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rmeyers

Active Member
Joined
Dec 20, 2013
Messages
36
Location
Denver, CO
Type I VW, 82 mm stroke crank and 90.5 mm pistons.
What is the shortest connecting rod that can be used without the crank or opposite rod hitting a cylinder or piston skirt? Common lengths, as per ScatVW are 5.394 in., 5.500 in. and chevy length, 5.700 in.
Not worried about the cam, just the cylinder bottom and piston skirt clearance.
 

Pops

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Joined
Jan 1, 2013
Messages
10,141
Location
USA.
Type I VW, 82 mm stroke crank and 90.5 mm pistons.
What is the shortest connecting rod that can be used without the crank or opposite rod hitting a cylinder or piston skirt? Common lengths, as per ScatVW are 5.394 in., 5.500 in. and chevy length, 5.700 in.
Not worried about the cam, just the cylinder bottom and piston skirt clearance.
So many variables. Not only rod length but what rod.
Need to use piston set that is designed for stroker cranks, they have shorter piston skirts. Then I prefer the longer length rod because of the shorter piston skirts and the increase side load of the longer stroke.
http://www.cbperformance.com/product-p/1291.htm
https://zoomaviation.com/programs/vw_engine_specs_&_formulas/
 
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