Trying to get stiffer valvesprings and titanium retainers but no one seems to know what head the jdm d15b is related to, anyone have any ideas? I need solid info, no guesswork. TIA

 

I believe it is a z6 head.

Z6 head
VX block
VX rods
some other piston (NON VX)

 

I was under the impression that the rods were different, i read somewhere that the d15b has the same r/s ratio as a b16....


EDIT: Rods are 137mm (simliar in sized to the d16z6)Rods are stronger than vx, built like d16z6 rods.
R/S ratio : 1.62 (just like the b17a). Like stated above the head is most similar to the d16z6 92-95 si motor, i just want to be absolutely sure.

 

VX rods are the largest d-series rods... look for post about them from Mista-bone, he's done a few comparisons.

 

VX rods are 137mm and have the lower wrist pin location...you can use VX rods in a 1.5L block and put 1.6L pistons on...meaning A6/Z6/A1 etc
D15 Rods are shorter and have a higher wrist pin location

 

z6 and d15b head castings are the same- d15b has a much better r/s ratio than the z6 as someone has already pointed out

 

So, can a jdm D15b take as much or more boost then a D16z6.. I know the d15b7's are weak..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Slammd Sol &raquo;</TD></TR><TR><TD CLASS="quote">...know the d15b7's are weak..</TD></TR></TABLE>

They aren't THAT weak.