ZC1(D16A1)Piston question and some other

The ZC1 has compression of 9.3:1 right?.....What other pistons can fit in the block?....As far as i have read the PM7 will not fit? are there any other options?

The engine that i have is a Brown top.....with 4 bolts on the inside ,should be a 85-87 teg. engine?
If i was to turbo it the PBGM would be the best option?

Ok a friend is saing that B16 pistons will work well in a D16A1.....is he right?

Ok a friend is saing that B16 pistons will work well in a D16A1.....is he right?


no.



A B-series motor has a completely different bore and stroke. The bore of the piston and the piston pin location won't allow this to work, unless you wanted to spend more money than it's worth on custom made parts to turn your ZC1 into a stroker. Then again I think your friend should stroke it just for suggesting the idea.

Check this link:
http://www.theoldone.com/components/pistons/
These are the best pistons you can buy for your ZC1.

The "Browntop" Civic/ Integra ZC1 actually has a lower compression than the Blacktop ZC motor. The ZC1 has flat top pistons while the Blacktop has domed (interference) pistons. Sorry, I don't remember the CR for the Browntop off the top of my head.

Here's a little secret...

The '85-'87 Browntop ZC1 is exactly the same as the USDM '86-'87 Integra Browntop D16A1, with the exception of the cams and exhaust manifold. The '88-'89 Blacktop Integra ZC is exactly the same as the USDM '88-'89 Integra Blacktop D16A1, but again the cams and EM are different. The 2G CRX ZC ('88-'91 DOHC) is exactly the same as the '88-'89 Integra ZC with the exception of the valve cover bolts, timing belt/cover, cam gears and motor mounts, but all the internals are interchangeable.
Note: The Browntop D16A1/ZC1 uses a unique oil pump.

What does all this mean?

Well this means is that if you wanted to up the compression on your ZC1 you can install regular old '88-'89 Integra D16A1 pistons to gain a 9.3:1 CR. If you want turbo pistons, either use the pistons you have (until you burn a hole through the piston), or any forged '85-'91 ZC piston will work.

NO OTHER D-SERIES PISTONS WILL WORK! The D16A1/DOHC ZC pistons have a taller compression height than any other D-series motor due to the large compression volume of the head. If you tried to swap in a D16A6 piston you'd end up with somewhere around an 8:1 CR which would suck on ANY motor, N/A or turbo.

Hope this helps.

no.



A B-series motor has a completely different bore and stroke. The bore of the piston and the piston pin location won't allow this to work, unless you wanted to spend more money than it's worth on custom made parts to turn your ZC1 into a stroker. Then again I think your friend sho......


Helps...but are you surten that it has a flat top?.....my PG6B pistons are domed...So PM7 pistons will work they should be DOHC ZC 88-89

here a pic of my pistons http://www.zone.ee/Deadhitman8/14-12-05_1732.jpg
Should be a dome or is that called flat?
I postet at D-series.org and they say that PM7 pistons will up the compression to 9.5:1....is it correct?

The pistons you posted look exactly like '86-'87 D16A1 flat top pistons. I know they have a little dome to them but when you compare them to the '88-'89 pistons there is a noticeable difference in dome height. Are the PM7 pistons the '88-'91 ZC pistons? If so they should give you about 9.3:1 or 9.5:1 CR depending on your head gasket thickness and condition of your head. When I built my motor I used '88-'89 Integra pistons (I think they were marked PG7, but I'm not going to pull the head off just to double check), shaved the head and used a factory Honda head gasket (no Felpro crap), I ended up with a hair less than 10:1 CR. But if you're building a turbo motor, why do you want to up the compression?

Check out this link:
http://muller.net/sonny/crx/

Here's a direct link:
http://www.muller.net/sonny/crx/integra-87vs89/index.html

The pistons you posted look exactly like '86-'87 D16A1 flat top pistons. I know they have a little dome to them but when you compare them to the '88-'89 pistons there is a noticeable difference in dome height. Are the PM7 pistons the '88-'91 ZC pistons? If so they should give you about 9.3:1 or 9.5:1 CR depending on your head gasket thickness and condition of your head. When I built my motor I used '88-'89 Integra pistons (I think they were marked PG7, but I'm not going to pull the head off just to double check), shaved the head and used a factory Honda head gasket (no Felpro crap), I ended up with a hair less than 10:1 CR. But if you're building a turbo motor, why do you want to up the compression?

Check out this link:
http://muller.net/sonny/crx/

No just thinking if i just up the comp. then i will not turbo ......but if i will then ill need new rod to........im still thinking...if i find a turbo then ill keep the old ones and maybe to something like the guy did on his webpage

If i dont find one ...ill do i/h/e maybe put in a set of dohc zc cams

...ill do i/h/e maybe put in a set of dohc zc cams

That's what I did.

'88/'89 pistons
Blalanced pistons and rods
Ported and polished head (shaved to 10:1 CR)
Lightened flywheel (12 lbs)
ZC cams
Ported 2G CRX ZC intake manifold (biggest one available)
Adjustable cam gears and fuel pressure regulator
'95 Civic fuel rail
DC Sports header
CAI
LSD
ACT clutch

I just finished my swap and I'm still breaking the motor in so I haven't driven it much, but it sure is fun to drive!

Thx for the info :iceslolan
think ill be doing something similer

Here some pics of the engine....sry phone camera
http://www.zone.ee/Deadhitman8/pildid/20-12-05_1429.jpg
http://www.zone.ee/Deadhitman8/pildid/20-12-05_1435.jpg http://www.zone.ee/Deadhitman8/pildid/20-12-05_1431.jpg

Looks good!

Did you polish the block and head?

I have a blast cabinet so I glass beaded all my aluminum parts for a nice satin finish. Someday I'll post pics.

Looks good!

Did you polish the block and head?

I have a blast cabinet so I glass beaded all my aluminum parts for a nice satin finish. Someday I'll post pics.

All by hand
:biggrin: and used somesort of motor cleaning stuff.....worked just fine :grinyes: .....then used some heat resistent paint to bring out the realy shiny look

Looks good!

Did you polish the block and head?

I have a blast cabinet so I glass beaded all my aluminum parts for a nice satin finish. Someday I'll post pics.

All by hand
:biggrin: and used somesort of motor cleaning stuff.....worked just fine :grinyes: .....then used some heat resistent paint to bring out the realy shiny look

PS...Polishing didnt give the shine i wanted