The B18C1 is the engine code for the GSR
B18C5 is the code for the R
VTEC has nothing to do with the block of the engine, It is all in the head and valvetrain, basically it is a second set of lobes on the camshaft that start working at a set rpm to give the head a higher lift/longer duration for higher performance. the B18B is a non-vtec engine (LS) if you take the head off of a VTEC engine and put it on the LS engine you will have a VTEC engine now, but your engine size went up due to the larger displacement bottom end of the LS, its a win win situation. Obviously the VTEC is a DOHC engine is going to be more powerful than the VTEC engagement of a SOHC engine.
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R.I.P 00' ITR #479
1996 GSR: Built Bottom - Built Head - Big Injectors - Big Turbo - Computer Thingy - 500+ whp
*2-6-06* Waiting for the Full-Race Stg 3 with GT35R
.82 a/r Upgrade and Nitrous Express NXL
http://www.cardomain.com/ride/2241056