Jonathan_ED3

I want to do a turbo D series.

I noticed I've got a d15z1 currently.

I know I'll need to swap transmissions, but other than that, what exactly seperates the z1 from the likes of a vtec d15b? Is it more than just a vtec head? Are there differences inside the block?

I'm trying to figure out if it's possible for me to do a mini-me or whatever on my current block and then turbo, or if I should just save up and fork over for a JDM 15b, or a Z6?

I've tried searching, but I haven't found anything that I'm particularly looking for.

TIA.

Tad

well you should remember that with the minime, your compression will raise.

and it wont be as easy to run a turbo setup on a high comp engine.

you want that low comp so you can run more boost.

Jonathan_ED3

What will it raise to? I can't even find what the c/r is now.

As far as the block goes, what are the differences in the z1 block from the JDM d15b?

piscorpio

the rods and pistons are different. The z1 has dished pistons, which with a mini-me setup will actually create a low CR, somewhere in the neighborhood of 7.5:1. The rods in the z1 are similar to the z6 in length (if not identical, can't remember right now). As far as the actual block, I am almost certain they (d15 blocks) are all identical, its just the stuff inside that differs. Check my sig. under the d series piston comparo, there is good detailed info there. Hope this helps.

piscorpio

BTW, the stock CR on the d15z1 is 9.3:1

SloCivicHMM

vx rods are the biggest of all d series from what I have read.....mistabone confirmed this before I believe, not too sure though....

Mista Bone

Rods are the same between the D15Z1 and D15B. The main differences is the pistons and the VTEC vs. VTEC-E head.

Both D15Vtec motors use 137 mm long rods, but they are not as string as normal D16 rods.

KevronsEG

the jdm d15b sohc vtec is a vx bottom end with z6 pistons and head with little more aggressive cam tahst it has best ros to stroke ratio of d series

Mista Bone

it doesn't have the best R/S ratio at 1.62, there is a D series motor that has a 1.8x R/S ratio from the factory.

Jonathan_ED3

That answers a lot of the questions I had, guys. Thanks.

Does anybody know what the HP limit is of the stock D series bottom end? I guess stock for stock the z6 would be the stouter since Mista Bone says the rods are stronger?

Are there any manufacturers of forged internals for any of the D series?

piscorpio

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jonathan_EH &raquo;</TD></TR><TR><TD CLASS="quote">
Are there any manufacturers of forged internals for any of the D series?</TD></TR></TABLE>

Yes, there are actually a few. Eagle, Crower, CP pistons, SRP, JE, AEBS, among others, all have d16 applications.