Recently I swapped out my D15 out of my Civic DX for a more powerful I thought B16A1. Don't get me wrong, the engine is a big improvement to my car, but when I got it it had a drive plate on it from an automatic tranny. I took it off and made it work for the manual, but I was wondering if the automatics are build differently or are just slower than regular B16's. If anyone has any idea let me know. I am also thinking about running 10 psi on it. Does it being an auto make a difference on how much boost I can run?

 

the cams are milder and the valve springs need to be replaced.

 

Milder? What does that result in?
Why do I have to replace the valve springs?

 

milder meaning not agressive so they make less power.
and the valvetrain just sucks on the auto b16.

 

theyre only 150hp

 

i had an auto B16a in my hatch. I drove a different EF with a 5spd B16a and the enigine just roared loud at vtec. More louder than my auto B16a! Felt a lil faster

 

The cams are less agressive, therefore, the valvesprings don't need to be as stiff due to the cam profile having less lift.

 

Hey, JDMDasilva, you don't have IM turned on.. I think I might know you... ever lived in Canada ?

 

they are single valvespring on intake side. i know because i have an auto head.