Just wondering which motor is better and why does one have more horse or torque besides the a being older any other things?
Thanks
Spencer
_______

 

ya i would like to know too, i have not been able to find any good information on the the differences of the b18a/b. i was kinda just looking for a comparison of the 2 motors to see what im dealing with.

 

The B18a is from the 90-91 integra. It has 130hp.

in 1992 the 2nd revision of the b18a was released with 140hp, becuase of bigger cams (more lift/duration), better exhaust and intake manifolds. In 1994 the b18b came with better head design (coolant passages changed) also different intake manifold again - 142hp.

The major differences between them (physical structure):
1. coolant sensor 4 the fan control is on the rear of the block on B18a and on the thermo housing on the B18b
2. driver side motor mount that bolts to the block is different
3. crank pulley on a B18A has a v-belt for the power steering and on the B18B it has a Tri-rib belt for the power steering.

The blocks are almost exactly the same, I would get either - it just depends on which you can find and how much you can get it for.

 

^*edit* damn, beat me to it. ohh well...^

USDM b18a (90-91) = 130 hp, 121 ft/lbs
USDM b18a (92-93) = 140 hp, 121 ft/lbs
USDM b18b (94-00) = 142 hp, 127 ft/lbs

all of them have: 81mm bore, 89mm stroke, 9.2:1 c/r, same crank, 1834cc. pretty much the only difference in the blocks is the engine code stamp.

the only real difference through the years has been revised cams, ecu's, intake and exhaust manifolds

 

btw, just to inform you (this has nothing to do w/ the motor/block etc)

b18a complete swaps to my knowledge came w/ cable trannys

 

were the 90-91 b18a's obd0, and the 92-93 b18a's obd1?

 

and also would the second version of the b18a be stamped as b18a2? or would it still be b18a1.

 

Thanks Alex for the info did not know you knew so much about the ls i would have asked you lol

 

the second version of the b18a went on through 95.... the b18b was not put in the integras until 96 when they were converted to obd2... so 90-91 are non obd (i believe) 92-95 are obd1 and 96-2001 obd2 (pretty much the same as the civics....)