Hi all.......this is my first time posting here, (I have lurked a few times 'tho).

I have a couple of questions for the motorheads here; I'll try and be brief.
I've got a pretty nice '91 Civic Si hatch. The stock D16A6 is getting tired: 20+% leakage in two cylinders, using a bit of oil after 155K mi., etc. Everything is stock, except a cat-back exhaust thats nearly new. 'Just a daily driver, no race car or custom, (I've got my bikes for that).

Now the questions.

I have two other complete engines which I can rebuild and drop in:

#1 another D16A6.
#2 a D16A1 ('89 Teg)

The rebuild will be from "the bottom up", fresh bores, etc., I have a pretty well equipped shop and can do everything myself. I just want a solid running engine with minimal installation hassles, but a little more push never hurts!

My thoughts so far are to use the A6 block, +.50 over pistons from an '89 Teg (higher compression?), and pirate the head from the twin cam A1.
I guess what I'm trying to do is sort of bring the A6 up to ZC specs.

Will this work?
Is it worth the trouble?
What (OEM Honda) cams would be the best?

Anyone's thoughts or suggestions would be appreciated.

Thanks in advance.

Keith

 

It will work but this is what I would do. Use the a1 block but use a 96 up sohc non vtec head with crx manifolds. It has a smaller combustion chamber for higher compression, bigger valves and will make more power than the dohc zc will.

 

we currently do those D16a6 mods with the A1 pistons. I'll get some pics and stats up soon on the website.
We have a D16a6 block with knife edged crank with A1 pistons here. about to go into a car. Using our custom Exospeed SOHC camshafts. If it gets broken in enough on Friday, then we'll for sure take it out to race on Saturday.

Wil

 

i agree with "Wil"

Use 89 integra pistons (p29?) in your single cam.

 

Get the A1 pistons and get a nice cam and raise redline