I'm going to re-build my B16A, heard that B18C R crank & piston works in B16A with tailored rod, is it true?
I got to keep my B16A block and can't swap to B18C block due to some reason, is the aftermarket 1800cc kit the only way?
I got an B18C R crank, rod & piston. Need someone help!

 

you can search around for info on this, but changing the crank to longer stroke in a short block wil decrease the rod ratio considerable. You will also need the custom rod length. You may be confusing the b16a block with b16b block, the latter is the same height as the GSR/Type R.

Greg

 

Thanks Greg.
Yeap, I know both height of B18 block is exactly same as B16B, the question is that is it really work, any special modification required except rod?
Anyway, Thx....

 

never actually done it, I'm inclined to believe you need to modify skirt but not sure ... I do know its possible as Toda Racing sells their stroker kits.

their lighter weight pistons conpensates for some of the lower rod ratio though ...

Greg

 

bump

 

The B18C crank has displacement 87.2mm
Deck Height of B16 is 203.39mm
Deck Clearance = 0.00mm - run piston tops level with blocks deck
Piston Compression Height = 30mm

Hence,
max Rodsize = Deck_Height - Deck_Clearance - Compression_Height - Stroke/2
= 203.39 - 0.00 - 30 - (87.2)/2
= 129.79mm ROd length, yielding R/S = 1.488

Alternatively, you can order custom pistons with piston pin increased 3mm, so you can achieve a 3mm longer rod
longer rod = 132.79mm, yielding R/S = 1.523mm

NOTE1: R/S 1.488 is extremely low. Honda dont have a stock combination this low.
NOTE2: R/S 1.523 is the same ratio as the ZC & D16 engines, and just short of the 1.58 R/S of the B18C

Personally i am thinking why bother

 

What he said

 

thanks guys.
I got an B18C R block assembly(without cylinder head assembly), I'm thinking that it's possible to swap crank & piston into an B16A to upgrade to 1800cc instead of swapping the whole cylinder block assebly. There's some issue right here that I can't change the cylinder block.

 

why dont you bolt on your B16 head onto the B18C?

or is that what you're saying (ie you cant change the block?)....im confused

 

I had already swaped the B18C R cylinder head ***'y to my B16A, the problem is I can't use the B18C R cyclinder block, it's right here. It's local law that we can't change the cylinder block.........

 

would a LS block / ITR crank / GSR rods / CTR pistons all fit together ??