hey guys, this post isn't for me but for a friend on here (panda_si) so he wants to build up the d-series and isn't swapping for a B motor

A few months ago I heard from a person that on a d-series motor you can put in 1989 Integra rods and pistons to bump up the compression.

First of all, is that true? if so does anything need to be done to the rods/block to run them or will they just bolt in?


If that combo does work...what would the compression be around with a stock head gasket?


thanks

 

http://www.knology.net/~jediklc/dcalc.htm

Play with that if you haven't seen it already.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by The_Head &raquo;</TD></TR><TR><TD CLASS="quote">http://www.knology.net/~jediklc/dcalc.htm

Play with that if you haven't seen it already.</TD></TR></TABLE>


thanks..saw that link before

Just wondering if anybody here has doen this build before?

 

Which block and head is he gonna be using?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JV &raquo;</TD></TR><TR><TD CLASS="quote">Which block and head is he gonna be using? </TD></TR></TABLE>


Stock D16Z6 Head and D16z6 block

 

Yes it is true that you can run the P29 *aka 88-89 D16A1 pistons, aka DOHC ZC* in a 1.6 liter D to bump compression. All 1.6L rods are of the same length/strength so there is really no advantage to running the A1's over any of the others. The Z6 rods will work just as well.

P29's with a Z6 headgasket should yield a CR of around 12.0-12.5:1 or so.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JV &raquo;</TD></TR><TR><TD CLASS="quote">Yes it is true that you can run the P29 *aka 88-89 D16A1 pistons, aka DOHC ZC* in a 1.6 liter D to bump compression. All 1.6L rods are of the same length/strength so there is really no advantage to running the A1's over any of the others. The Z6 rods will work just as well.

P29's with a Z6 headgasket should yield a CR of around 12.0-12.5:1 or so. </TD></TR></TABLE>

what you really mean is pm7, since 88-89 d16a1 and JDM DOHC ZC have pm7 pistons. p29 pistons are from JDM DOHC ZC OBD1 which came out in some 92-95 special model civic

 

I'll be putting together a D16A6 block/head/rods with the 1st gen Integra pistons, here shortly. All the machine work for the block has been completed by DFE Enterprises in FL. DFE is also just doing a basic valve job for me. I want this to be a low buck build.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91civicDXdude &raquo;</TD></TR><TR><TD CLASS="quote">
what you really mean is pm7, since 88-89 d16a1 and JDM DOHC ZC have pm7 pistons.</TD></TR></TABLE>

No what i mean is the USDM D16A1 P29 pistons.

13101-P29-000 PISTON 4 1989 Acura INTEGRA

http://www.acuraparts247.com/s...ch=no

As far as i know the PM7 is JDM DOHC ZC only...

 

well i've taken apart 3 88-89 d16a1 engines and guess what? all of them had pm7 pistons, identical to JDM DOHC ZC.

as for the p29 part number, my guess is that when they created the obd1 dohc zc, they refined the pm7 piston and that part number replaced the pm7, but if you were to take apart an 88-89 d16a1, you will find that it has pm7 pistons

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91civicDXdude &raquo;</TD></TR><TR><TD CLASS="quote">well i've taken apart 3 88-89 d16a1 engines and guess what? all of them had pm7 pistons, identical to JDM DOHC ZC.
</TD></TR></TABLE>

Well i can't say i have ever taken one apart, so i will have to take your word on that.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91civicDXdude &raquo;</TD></TR><TR><TD CLASS="quote">
they refined the pm7 piston and that part number replaced the pm7.</TD></TR></TABLE>

Very well could be. It would be ideal if someone could provide some visual proof of the USDM A1 being originally equipped with pistons marked PM7.

 

i have the zc piston in my moter

 

Thanks for all the info...this will help me as I'll be building the motor very shortly.

Any other information is appreciated

Thank you

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SMSP &raquo;</TD></TR><TR><TD CLASS="quote">I'll be putting together a D16A6 block/head/rods with the 1st gen Integra pistons, here shortly. All the machine work for the block has been completed by DFE Enterprises in FL. DFE is also just doing a basic valve job for me. I want this to be a low buck build.</TD></TR></TABLE>

You should post some pictures of your build. I have often heard of people using these pistons, but have never seen it done.

 

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by foot &raquo;</TD></TR><TR><TD CLASS="quote">

You should post some pictures of your build. I have often heard of people using these pistons, but have never seen it done.</TD></TR></TABLE>

Will do, plus graphs.

 

here is a good thread I found about this build

http://64.233.187.104/search?q...hl=en

Does anybody know the difference between the D16A1 and A6 pistons? as in the compression changes between the two and what they might possibly yeild in. Want to research this to make sure proper valve clearance will be allowed.

here is something else I found

The 86-87 d16a1 pistons you have are different from the 88-89 d16a1 pistons. Those pistons have a flat top, the 88-89 are domed. You will raise compression with them, supposedly about 11.6:1, but don't take my word for it though. Of course, you would yield higher compression with the 88-89 d16a1 pistons.

anybody can clarify this?

 

using this d-series site calculator

http://www.knology.net/~jediklc/D.htm


Using P29 USDM D16a1 Pistons on a D16Z6 head and block will result to 12:1 Compression ratio
You get the same compression ratio with the PM7 pistons so that doesn't really matter


here is a good read
http://faq.ef-honda.com/index....ng=en

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr.RHTuner &raquo;</TD></TR><TR><TD CLASS="quote">here is a good thread I found about this build

http://64.233.187.104/search?q...hl=en

Does anybody know the difference between the D16A1 and A6 pistons? as in the compression changes between the two and what they might possibly yeild in. Want to research this to make sure proper valve clearance will be allowed.

here is something else I found

The 86-87 d16a1 pistons you have are different from the 88-89 d16a1 pistons. Those pistons have a flat top, the 88-89 are domed. You will raise compression with them, supposedly about 11.6:1, but don't take my word for it though. Of course, you would yield higher compression with the 88-89 d16a1 pistons.

anybody can clarify this?</TD></TR></TABLE>

The A6 pistons are dished and the A1s have a dome. I don't know about hte 86-87 pistons but I was always told to use the 88-89 ones. I used the 88 pistons in my 12 valve 1985 1.5L GT4 engine and had to cut new exhaust valve pockets since there was only 1 exhaust valve and it was much bigger than the A1 or A6 exhaust valves.

You'd all get a kick at how I did the reliefs back in the late 90s, in my garage, with a bench press and some SBC valves. I'll leave the rest up to your imagination.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SMSP &raquo;</TD></TR><TR><TD CLASS="quote">The A6 pistons are dished and the A1s have a dome. I don't know about hte 86-87 pistons but I was always told to use the 88-89 ones. I used the 88 pistons in my 12 valve 1985 1.5L GT4 engine and had to cut new exhaust valve pockets since there was only 1 exhaust valve and it was much bigger than the A1 or A6 exhaust valves.

You'd all get a kick at how I did the reliefs back in the late 90s, in my garage, with a bench press and some SBC valves. I'll leave the rest up to your imagination.</TD></TR></TABLE>


That's awesome ... I can't wait till we start this build. I got pretty crazy expectations on this engine that we build but I'm hoping to get the D-series with headers, ITB and well tuned to a good set of #'s produced

Only thing I'll have to do is clay the motor with the new pistons to check clearance. Anybody have any good detailed information on how to clay the engine properly with new pistons and check for proper clearance?

 

One more question....what about rods? can I use the stock D16Z6 rods or would I need to use the integra d16a1 rods? and same goes for rod bearings..?


Anybody know where I can buy new d16a1 pistons with rings on them? checked ebay and nothing on there

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr.RHTuner &raquo;</TD></TR><TR><TD CLASS="quote">


That's awesome ... I can't wait till we start this build. I got pretty crazy expectations on this engine that we build but I'm hoping to get the D-series with headers, ITB and well tuned to a good set of #'s produced

Only thing I'll have to do is clay the motor with the new pistons to check clearance. Anybody have any good detailed information on how to clay the engine properly with new pistons and check for proper clearance?</TD></TR></TABLE>

BTW, I have a big tube D series header that I'll sell fairly cheap. I was planning to run it on my engine since I have it but it really is too big for the mods I will have.

 

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr.RHTuner &raquo;</TD></TR><TR><TD CLASS="quote">One more question....what about rods? can I use the stock D16Z6 rods or would I need to use the integra d16a1 rods? and same goes for rod bearings..?</TD></TR></TABLE>

Pretty sure i answered your first question already. Plastigauge will tell you which bearings to run.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr.RHTuner &raquo;</TD></TR><TR><TD CLASS="quote">
Anybody know where I can buy new d16a1 pistons with rings on them? checked ebay and nothing on there</TD></TR></TABLE>

http://www.acuraparts247.com/s...ch=no


...and i think nippon racing sells a P29 spec piston also.




Modified by JV at 5:45 PM 10/19/2005

 

Just for info the 86-87 are flat top pg6 is the code.