2.3 SLOW BOY RACING stroker motor I need a new 4g64 crank help

[garputo2]

I notice some ticking in my 500 awhp slow boy racing engine. I pulled the pan and popped the caps of 1 and 4 were damaged from one of the oil squirters going thru the system. I didnt spin any bearings but number 4 had a nice gouge in it. I think it is too bad to just polish is out and throw new bearings in. This was a brand new OEM 4g64 crank which slow boy says they dont make anymore. I have found a site that sells regrind 4g64 cranks I was wondering if anybody has used these cranks and would recommend it. The eagle crank runs 550 but from my tuner Lucus from English Racing he states they need to be properly fitted as the eagle cranks can sometimes be difficult. I would like to know should I throw this Regrind in or a eagle.

 

[smrogers5771]

man.. personally if it were me... id pull the motor and get the eagle crank and while your at it might as well as hone the cylinders and re ring it as well..... Oh yeah please make sure that, that crank is BALANCED to the weight to the pistons and rods that you are using. People tell me all the time blah blah yeah it was blue printed and all this and then throw a rod bearing wondering what happened...... simply put get the eagle crank and have it weight balanced to your pistons and rods.

 

[JusMX141]

Pull the crank, have the journal with the groove turned down to the next undersized bearing. The rest of the journals will be stock; only one will be undercut...nobody knows but you- even the engine won't know.

 

[smrogers5771]

Pull the crank, have the journal with the groove turned down to the next undersized bearing. The rest of the journals will be stock; only one will be undercut...nobody knows but you- even the engine won't know.

yes molest it

 

[garputo2]

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http://i291.photobucket.com/albums/ll305/garputo/rodbearing2.jpg
http://i291.photobucket.com/albums/ll305/garputo/rodbearing.jpg
http://i291.photobucket.com/albums/ll305/garputo/mainbearing.jpg

http://i291.photobucket.com/albums/ll305/garputo/mainbearing.jpg

 

[ziggo0]

That was one pissed off oil squirter. I feel your pain, 3 of mine broke off and caused the same thing

 

[JusMX141]

Looks like the bearings took the majority of the abuse. If you can polish that little groove out of the crank, I think you'll be absolutely fine with just replacing all of the bearings and hoping that your oil pump didn't get ruined from the metal as well.

 

[NOSLO2PT0]

Pull the crank, have the journal with the groove turned down to the next undersized bearing. The rest of the journals will be stock; only one will be undercut...nobody knows but you- even the engine won't know.

Then ya gotta buy two sets of bearings. You know us DSMers are cheap. Hell, we would re-use bearings if we could get away with it!

 

[garputo2]

I believe that is a fracture if you look closely it becomes more visible. I will post more pics when its out.

 

[bwhite]

Thats nothing..My center bearing/thrust bearing was completely tore up when I rebuilt mine. You could easily polish that out. I believe I used 2000 grit sand paper and polished mine out smooth. The journal was scored pretty good, much worse then yours. Mine still runs great after many hard miles.

 

[donniekak]

That crank is junk. A piece of it between the "scratch" and a fracture into the oil galley is about to break off.