Honda D15 High Compression Build

Currently building my D15B7 engine in my crx due to worn out oil piston rings. Was looking to get some high compression pistons but I am unable to find any for my block. I have found high compression pistons for D16 engines, would I be able to use the D16 high compression pistons in my D15B7 block? I read somewhere that all d15 and d16 pistons are identical. Can anyone here please point me in the right direction. Currently running the d15b7 block and d15b2 head.

Not all D15 and D16 pistons are identical - I'm no expert on Honda pistons (or Honda engines), but all D16s had a 75mm bore, while some D15s had a 74mm bore, so they couldn't have shared pistons.

Custom pistons are not that expensive or rare.

erohslc wrote: Custom pistons are not that expensive or rare.

So any machine shop can make them? I've never thought about that.

GameboyRMH wrote: Not all D15 and D16 pistons are identical - I'm no expert on Honda pistons (or Honda engines), but all D16s had a 75mm bore, while some D15s had a 74mm bore, so they couldn't have shared pistons.

Then you could punch out the D15 block 1mm and use std size D16 pistons.

Junior_Jose wrote:

erohslc wrote: Custom pistons are not that expensive or rare.

So any machine shop can make them? I've never thought about that.

Machine shops typically don't make pistons.

But you can buy off the shelf D15/D16 pistons in probably any compression ratio you'd like.

Don't quote me on this, but look into Civic GX pistons. The GX was the LPG factory-converted Civic and I remember the pistons were rather high compression. I dunno if they'll work in a D15 or not, but it's worth doing some googling.

Redpepperracing.com/forums

Junior_Jose wrote:

erohslc wrote: Custom pistons are not that expensive or rare.

So any machine shop can make them? I've never thought about that.

Wiseco does. Custom is the same cost as off-the-shelf IIRC, you just have to wait longer.

Junior_Jose wrote:

erohslc wrote: Custom pistons are not that expensive or rare.

So any machine shop can make them? I've never thought about that.

No, but the web makes it easy to hook up with companies that do.

plenty of companies making pistons... Wiseco already mentioned... you might check out JE Piston, and CP, as well as Arias... all well known aftermarket piston manufacturers

<img src="" /> I spoke to a lot of people today about engine building and racing reliability. Came to the conclusion that d15 engines are not exactly designed to take abuse. On the other hand Acura Integra power plants are designed for high reving use. I decided to look for a DOHC swap and I found a perfect specimen for a raving project. Came across a 1991 Acura Integra XSI with a B20B engine, very fast and very fun to drive car! After a quick test drive through all the gears to make sure there were no grinds or pop outs, i concluded that this car was for me. The engine oil did smell like gasoline, but it didn't matter since the engine is getting a fresh set of rings, pistons, bearing, gaskets, timing belt, etc..... Now the question is what to do with my CRX???? The integra is in too good of shape to just tear it apart. I would love to see the CRX fly with a new B20 engine under the hood. What to do??<img src="#//s965.photobucket.com/user/deveous9/media/IMAG08401.jpg.html][/URL]" /> <img src="#//s965.photobucket.com/user/deveous9/media/00Z0Z_4vS7tCcXL8U_600x450.jpg.html][/URL]" />

The integra is in to good of shape to tear apart? Cant tell if serious. Looking beyond paint, the fender, door and hood in pic are all ill fitting/ damaged. Seems pretty clapped out to me. yank what you need and ditch the rest.

+1 to the above...that thing looks rough. I love DA Integras, but I think you should put all the goodies in your Crx...although maybe you should show us your Crx first?

Oh, and what is an Intagra XSi? Never heard of that one...

Ok I took the integra to a alignment shop and they inspected the chasis and suspension. They told me it would need some ball joints, bushings, and a control arm. Decided to do an engine swap. Anyone have any experience in swapping a b20 into a crx? Will i need a custom axles or motor mounts? And the Integra looks rough but it drives so so good! It was sanded down and never primered by the previous owner. I liked the idea of bigger brakes, better suspension, and bigger engine.

Also, anyone know if i can use my crx si wiring harness to run the b20 engine?

B16/18/20 is a pretty well documented swap. You may way to start out at the Hasport website and check forums like Honda Tech.

Do the maintenance on your Integra before you do anything. I'd keep the B in the Integra, and build a D for the Civic. You can make plenty of power with the D for a CRX Si. If I recall correctly, there's lots of factory piston options that can bump the compression up.

www.d-series.org is your new site.

http://www.d-series.org/forums/naturally-aspirated/

http://www.d-series.org/forums/showcase/137595-farmerd-13-sec-d17-n-build.html

Or you can be a man and F-swap that pig.

http://www.d-series.org/forums/showcase/215978-f22-journey-2-2-liters-sohc-greatness.html

http://www.cb7tuner.com/vbb/showpost.php?p=3196572&postcount=174

^Build thread, lots of great info in there. http://www.cb7tuner.com/vbb/showthread.php?p=1304090

sethmeister4 wrote: Oh, and what is an Intagra XSi? Never heard of that one...

JDM DA Integra. B17A (DOHC VTEC), I think.

You Honda guys make my head hurt with all these numbers and letters.

B20 swap is in full effect.

gamby wrote:

sethmeister4 wrote: Oh, and what is an Intagra XSi? Never heard of that one...

JDM DA Integra. B17A (DOHC VTEC), I think.

As far as i know, the B17 was only in 92-93 GSR.

I'm confused overall, though.

Swank Force One wrote:

gamby wrote:

sethmeister4 wrote: Oh, and what is an Intagra XSi? Never heard of that one...

JDM DA Integra. B17A (DOHC VTEC), I think.

As far as i know, the B17 was only in 92-93 GSR. I'm confused overall, though.

I am confused as well. New to the Honda world and it is crazy how much variety there is.

Just to clear things up: The integra you bought already had a B20(CR-V engine) swapped into it, correct?

And now you are dropping the B20 into your CRX?