SystemShock

I got a d16a6 engine from a friend that is still in great shape. It has been sitting in my garage for some time so i think I finally want to build it up, but I'm not sure on which way I should go with the build. Was thinking maybe a d15 head on the d16 block for a n/a build. Did they make a d15 head that is a vtec that I could use on this? Also would a d17 bottem end internals work on this?

Fine_EF9

well there is a d15b vtec head but, i think its best just to get a z6/y8 head. you will have better luck finding those.

D16SiHatch

like he said there is a jdm d15b head, but it would be easier to find a usdm vtec head. the d17 block will not work. it is not interchangeable with 88-00 d15 and d16's.

SystemShock

I don't mean the d17 block, just the crank and rods. Would a d15 non-vtec head be a good choice to help build compression on this set up?

24TEN

iTrader: (2)

http://www.hondatuningmagazine.com/t...6a6/index.html

SystemShock

I'm not worried about being out of a job. I'm on medical leave with a torn tendon in my right shoulder and may have to get surgery done to fix it. Thanks for the web link about the d17 internals. That will help out a lot. After reading the article I think I will stick with the stock d16 bottem end internals. That seems like too much work to make it a stroker with the d17 parts. Would a d15 non vtec head help out on this n/a set up?

24TEN

iTrader: (2)

That's just my signature, it's not directed towards you specifically (didn't even realize that I've been outta work for a year now). A non vtec head is the same thing. The difference there is the cam and intake manifold. The physical head is the same cast.

SystemShock

yeah I got that. I just don't want to have to try to change part of the wiring to fit a jdm vtec head on a usdm ls block. unless I can get a harness that has the white usdm connectors on it. My main concern is the compression ratio of the swap. Would a d15 head be better for a n/a set up due to an increase in compression?

24TEN

iTrader: (2)

It's the same cast so there's no increase/decrease in anything unless you have it milled or run a different thickness head gasket. And if I might ask, what does a USDM LS block have to do with anything?

Manny 77

hey man i have aD15y7 motor i swap my d15y7 head for a vtec head d16y7 head, i plug every wire, the car runs but no vtec kick, i plug the A4 and D6 cables but dont work, i got the p28 ecu, can you help???

SystemShock

NVM, I'm getting my self confused. so there is no difference between the d16 and d15 heads? I thought that the cumbustion chambers sizes were different.

24TEN

iTrader: (2)

For the 16 valve non vtec heads, it's the same thing. Si or non Si 88-91, same cast head. I've even heard that the 92-95 16 valve non vtec heads are the same cast as well. Have you tried messing with the compression calculator? It's in the FAQ.

SystemShock

not finding it. I think I will just get some high top pistons to put in that a different head gasket and try to raise the compression that way. Maybe the p29 pistons from a zc engine.

D16SiHatch

what are you doing... *facepalm*