the gsr has a half girdle. the ls has no girdle.

 

The B18C also has oil squirters and the B18B does not.

 

the B18C has slightly less displacement, the whole VTEC assembly including cams, different intake and exhaust maifolds, oil squrters on the block

94-95 GS-Rs had oil coolers too

 

I know the b18c has 1797cc and the LS has 1834cc of displacement. What im wondering is the bottom end. Such as are the bearings made of different materials, are the cranks balanced and made of different materials, things of that. Most the things people have listed about the bottom end being different I listed in my question at the top. Anyone know whats different about the bottom end besides the things listed here.

 

...rod ratio..very important in ls/vtec...if thats what ur doing... its lower, so you cant rev it to high, like you could a gsr

 

the gs-r block, if my machine shop is correct, stated that the gs-r block has to have very thin sleeves put in inorder to be able to bore it out. this being said, i gathered that the origional sleeves are made of a different metal or something is different between the ls block and the gs-r block.