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JDM D15

  #1  
Old 02-03-2007, 03:00 PM
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Default JDM D15

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?
 
  #2  
Old 02-03-2007, 03:07 PM
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Default RE: JDM D15

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.
 
  #3  
Old 02-03-2007, 03:30 PM
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Default RE: JDM D15

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?
 
  #4  
Old 02-03-2007, 03:34 PM
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Default RE: JDM D15

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
 
  #5  
Old 02-03-2007, 04:09 PM
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Default RE: JDM D15

the JDM d15b is the most powerful d series, so why all the hype about the z6?
 
  #6  
Old 02-03-2007, 04:25 PM
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Default RE: JDM D15

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.
 
  #7  
Old 02-03-2007, 04:32 PM
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Default RE: JDM D15

so whats the diff between the heads? Nothing?
 
  #8  
Old 02-03-2007, 04:50 PM
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Default RE: JDM D15

im pretty sure they are the same head.
 
  #9  
Old 02-03-2007, 05:56 PM
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Default RE: JDM D15

the heads are the same, just from what i hear a different slightly more aggresive cam which may not even be true.
 
  #10  
Old 02-03-2007, 10:04 PM
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Default RE: JDM D15

Camis the same as Z6.
 

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