whats up honda tech im building my 2ND b series motor and this time i want to get my main brng clearance exact across the board maybe .002 as i will be geting it pretty hot. so im going to be using honda brngs to achive it and i was told to use this methode:

get main housing bore spec, bore gauge each hole and record specs, measure crank journel diameter,then do math. main hs - journel diameter - desired clearance = bearing thickness. my prob is i cant find the spec for main bore and im trying to measure using a snap gauge then micing that but my numbers just arnt coming out right. ANYONE EXPERIENCED engine builders wanna shed some info i would be stoked. thanks

 

Read the bearing codes on the block, crank, and rods. Standard honda clearances are 0.0015". The use earls bearing chart to determine honda bearing colors.

 

i would use a telescopic gauge and micrometer if i was you

 

If you want to be exact, then you should get the right measuring tools to do the job.

 

ok i think not everyone read the post all the way. i have every tool possible cuz im taking a college engine overhaul class. so i have bore gauges, telescopic(snap) gauge, and all the diff micrometers needed. my prob is im not the best with a telescopic gauge and its hard to get the same number consistantly. i am good with a mic so i kno my crank mesurements r dead on. however my teacher said i need the hs bore spec to set up the bore gauge. and using a snap gauge then mic just isnt accurate enough.

ps. i do kno how to use the block letter code and numbers on the crank. to acheve the stock brng size. but i dont just wanna order the same brng then find out its too much clearence. THANKS FOR EVERYONES COMMENT!

 

if you dont have access to a helms manual i would contact a reputable honda engine builder and ask them. you can try emailing endyn. but hopefully someone will chime in with the specs you're looking for.

 

thanks man i might try to contact endyn if no one post anything.