Is a JDM VTEC D15 block the same as a D15B7 block. Im guessing the only thing diff about the 2 engines is the head?

 

its a d15 block with a z6 head. but its a special engine like a b16b ctr engine. it uses a d15 crank and d16 rods which are longer then the d15s, then it uses special shorter pistons to lower the compression height. this give the engine a better rod to stroke ratio, whcih means the piston moves slower allowing for high rpm reliablity.

its a great engine, the cam is a little more agressive too, and i think it has a little bit higher compression over a z6, and better fuel maps in the ecu, and it had an option of an lsd transmission.

 

ah i see. Another quick question, I see some older d15b's have carbs, does this mean the head will always have to use a carb?

 

i don't know about that, i would think you could add fuel injection, if it had carbs to start i would just put better ones one. a guy on another site uses motorcycle carbs on his d15b2, its a pretty sweet setup

 

the JDM d15b is the most powerful d series, so why all the hype about the z6?

 

because you can get a z6 basically wherever you can get a honda.

the d15b is what went in the 5G JDM Si. in the US we got the z6.the b isbasically the japanese stepup from what they shipped to the US.

 

so whats the diff between the heads? Nothing?

 

im pretty sure they are the same head.

 

the heads are the same, just from what i hear a different slightly more aggresive cam which may not even be true.

 

Camis the same as Z6.