By Hoju (24.77.176.186) on Tuesday, May 01, 2001 - 03:36 pm:

I dont have one, i dont think anyway, but i always hear about how a cvcc is not something you want for performance. Why is this? Is it just for finding parts or what? I mean, in my case, with the accord, wouldnt it be better if i had the cvcc since it's bigger and has a 3 bbl? Also, my understanding is that all EK1 are CVCC, is this correct?

By Charles (137.219.16.107) on Tuesday, May 01, 2001 - 06:35 pm:

CVCC is a stratified charge system bought out by Honda to reduce emissions and improve economy.

In the states all the cvcc engines were quite doughy, getting the low compression and crap cam versions. When people looked to do them up they found big aftermarket carbs etc etc do not go straight on so they found a way around it (feed all chambers the same mixture. This negated the whole concept of the CVCC and would usually result in a loss of power rather than a gain.

In Japan the cvcc EJ1300 produced 70hp with a low 7.9:1 compression with really low emissions (a twin carb 8.6:1 RS produced 75hp).

A stratified charge system works by igniting a rich mixture in the prechamber which then spreads to a lean mixture in the main chamber. Usually these lean mixtures are hard to light by themselves with just a spark plug. A slightly leaner mixture that is throughly burnt will give out good hp and low emmisions.

CVCC stands alone when you go to turbo, there is far less chance of detonation or preignition as the lean mixture fed to the main combustion chamber is only ignitable by a flame front from the prechamber (where a rich easily ignitable mixture was hit with the spark plug). That is how we can run a cvcc EFI 1200cc turbo on 25psi of boost with a stock head gasket in an conditions. We could run even more boost if the turbo could stand up to it.

One day someone in the states or Canada (we never got the cvcc here) will fit the turbo system of the cvcc 1200 onto their "big block" EK1800 to get sensastional hp.

In my view the little EJ is probably the best suited to turbo with it's low compression ratio it would take very little to turbocharging and it is nice and light aluminium block that would not really change handling characteristics. I am trying to get the cvcc bits together in Australia to make a turbo EJ1300 bored out a little to about 1400cc.

EFI and cvcc works great an example is the cvcc version of the EW1500 (third gen civic engine) produced 90hp in Japan with a 9.2:1 compression ratio, they dropped the CR to 8.7 and added EFI to get 100hp. If they had of retained the original CR they would have made another 10 or so hp. 110hp from a stock, factory, SOHC 1500 released in 1985 would not have been bad. I am unsure of how much hp the EW produced in Australia or US. I am sure Anthony will be able to help on the Australia side of things.

If you are going to get an EK in the US try and buy one from an engine importer. A second generation accord EK 1800 had 100hp. That is much more than any US car had I am sure.

By Hoju (24.77.176.186) on Tuesday, May 01, 2001 - 09:27 pm:

Ok, so ..I have an accord with EL 1602. Now, this is around 68 hp right? What i wonder is, shall I just buy an EK1 (75hp wasnt it) for it or do something to the EL? I can find no parts for this motor (parts being header, cam, CARBURATOR.) I am having a ••••• of a time finding any carburator for my car. A new stock one from honda is 300$ so i might as well get a better one. BUT, NOBODY HAS ONE!!! Would it be better to put a different engine in or is there somewhere to get parts for my motor?

By Charles (137.219.16.107) on Tuesday, May 01, 2001 - 10:21 pm:

Is you motor currently a cvcc? We had an EL in Australia and it was not cvcc (same in canada I think). If it is not cvcc all you need to do is get a weber to suit and make up an adaptor plate. In Australia the EL was released in a very few cars with the twin carb setup very similar to the Dual keihins on the RS civic. EL cams can be obtained here and I am sure you could pick some up over there. Header may have to be custom made but this should not cost more than a off the shelf unit.

However after all this work (cam, carb, header you may pick up 30hp if you are lucky. If you bought an imported EK1 (jap spec) you would start with the same hp, more torque and then you still have the option of doing all those things to that motor. An imported EK is about $700 in Aus which is much cheaper than a weber (about$500), header ($400), cam ($400). I have had a couple of civics with Jap import EK1800s in them and they have gone very, very well. Even the handling is surprisingly good. Reliability is 100% Honda and they sound great with a decent system. I am a big fan of EK engines as a direct drop in for doubling stock hp on a civic. I first had one in my accord (yes I owned an accord once, 1st Honda I ever owned) and fuel consumption was great and it went very well for an old car.

Charles

By Hoju (24.77.176.186) on Wednesday, May 02, 2001 - 02:45 pm:

Yes, i have a non cvcc EL. I know of an engine importer where i could get any motor i want pretty much, so maybe i will get the EK. One strange thing about this importer is they sent my dad (manager at a honda dealership) a '90 civic motor with dual sidedraft carbs..i told him to save them just in case i could use them for anything. I have never heard of a civic in that era with twin carbs. Do you know what these are? What are the chances of them fitting on somehow? I have thought about this, and ..well i saw a picture of a prelude with stock twin carbs, and they went on the firewall side of the motor. Now, with my motor the exhaust manifold is there. Would this present any problems?

By Charles (137.219.16.107) on Wednesday, May 02, 2001 - 03:03 pm:

The carbs will go on if you make up a new manifold (a lot of fiddling around.. Both the D13B and the D15B came out with twin carbs in Australia and Japan. As yours was a 1990 it was probably a D15B. The D13B had them up until 1994.

Mark Moddejongen has a twin weber manifold for an EL, I think he may also have a twin keihin manifold (not sure on that).

Cheers,

Charles