Hey, I am finally about to assemble my motor. I know what honda recommends for main and rod bearing clearances. I just wanted some feedback from some all motor guys as to what clearances they are running. Thanks....


setup:

b16b block
gsr crank micropolished, balanced
IB I-beam ultralite rods
IB probe 81.5mm 7.1cc pistons
Portflow head
JUN III cams
rc 370's
hondata
ANR header

all new seals, gaskets etc..

 

It all depends on what you plan to do with your motor...do you want it to last or not??? I run 0.0015" to 0.002" clearance for my drag car. Street setup i suggest OEM clearances.

 

if you want it to last, run 0.0010-0.0012". 1st and 5th main bearing should be run at 0.0010", while 2nd, 3rd, 4th should be run at 0.0012". if you run them loose, they will "beat" themselves over time, granted a long time. if you keep it tight, you will make better power. the biggest thing to remember is that 1st and 5th main caps are always tighter than whats inbetween.