automatic

I want to put a JDM motor in my old lady's car and it's an automatic. Does anybody know what the biggest B series engine will fit in our 5th gen hatch?

The biggest of the B series is from the CRV. They are the B20B and the B20Z(the newer of the two and has more hp..140-145 i think). Not sure what you want to do about the automatic, tho...because your d series auto trans will not mate to a B series block...

Horsepower wise, Which has most output, I've seen sir motors with automatics, will that tranny hook up to a b18c?

most hp is the jdm b18c. itr motor, 200 horses at the flywheel. as for mating to automatic, you would have to get b series tranny and axles, etc. you could still do automatic i guess. i've never seen an automatic on a type r motor.