I'm swapping a lower mileage d15b2 motor and head into my 92 Civic d15b7's chassis. Should I keep the b2's cam with the motor or swap over the b7's? What will be the effect if I leave in the b2's? And why would it have that effect?

Just the motor and head are being swapped. The intake, exhaust, dist, coolant housing and tranny are staying with 92 chassis.

 

Use the cam designed for the motor you're using.

 

Why? Taking into account that the motor will be into a b7's setup(intake, fuel, etc) with a b2 cam-same or worse?

 

a cam is designed to work with the motor itself... The specific compression and flow characteristics of that motor wont be fundamentally altered by an intake and exhaust manifold.

 

Thanks for info and sorry to be a pain in keester-
What makes the d15b2 a b2 and what makes a d15b7 a b7?
Any specific knowledge of the difference of the cams in these motors, if any?