The International CBX Owners Association

bdento59 wrote:

EMS wrote:It will be a real challenge, Bill. As soon as you try to feed all cylinders air/fuel mix through one large chamber, the outside cylinders will have trouble breathing.

Yea, I here that. I'm wondering if a manifold like the attached photo might work...

http://www.supramania.com/forums/showthread.php?t=6519

The manifold you show is turbocharged. With outside pressure, you can pull it off. With natural aspiration, you'd starve the last cylinder.

Yaaaaaaaaaaaa.......it will work Bill .....but may need a few reworks to make it work perfect.

Check the photo in this link again
http://www.supramania.com/forums/showthread.php?t=6519

Carb in the middle of the mainifold for the CBX ...and the manifold tapered from smaller diameter in the middle to larger on the end ......so middle cylinders can not get more fuel.

We can try it at the Winter Rally if anyone knows a great fabricator that can whip this up in 30 minutes on Saturday evening!

On the other hand we can all go with the high theory of it all vs try something/anything........and ride our horses home.

I've got a vision of half of a "cross-ram" intake from an old Chrysler 413...........might be do-able.

Rick Pope wrote:I've got a vision of half of a "cross-ram" intake from an old Chrysler 413...........might be do-able.

On a roll here..........

The reason that Supra manifold works is because it is port fuel injected. All that is traveling down through it is air. Optimizing flow of air and air with fuel in it are two different animals. The best setup with a carb is as close to the valve as possible. The CBX is pretty good as is other than the angle.

After more research and discussions with several fabricators, I've decided to drop the project. Thanks to everyone for your valuable input, I appreciate it.

Darn! That's NOT the spirit, Bill

I was hoping he'd go for the three carb idea. If firing order was right, it would work as well as, or better than, stock.

Bill, are you coming to Columbus? Your idea would make for an interesting tech session.

I always like the look of three dual throat Webers but would they fit?

Three dual throat carbs actually don't have THAT much of an advantage in terms of maintenance and adjustment over six individual ones. The only thing they have less is three float chambers.

I still like the idea of a single carb on a CBX....infact ....I will go so far to say that most people would say without knowing the engine involved that six carbs on a six cylinder is far more difficult

Through Aaron I have met a guy that does work like this all the time.......and next time I go visit Aaron in NC, I am going over to see him. His qualifications......one is he hand builds Ford GT 40s from the original drawings that win best of show at GT 40 Rallies.

He told me he could put a full set of Honda PC bodywork on my FZR1000 which at the time might have been the ulimate sport comfy tour two up bike. I had both bikes sitting all alone in a barn....... and now so ticked off I did not do this. I saw custom intakes he has built and other things that are .....maybe..... a trillion times more difficult than this CBX manifold (trillion being the new buzz word in America.... )

Another person Aaron knows has done Moto GP engine work. I will talk to him also.

If/when they say this cant be done and for a reasonable price.........I will admit to it.......til then this is an open item........ at least ......for me. :twisted:

There is a 3-carb six-cylinder set-up available fairly cheap. It is off the Kawasaki KZ1300. One would have to make a manifold to combine the intake runners on the CBX for cylinders 1-2-, 3-4 and 5-6

bdento59 wrote:I'm in conversations with fabricators about developing a 1>6 intake manifold for single carb operation. I will update as necessary if it progresses past the feasibilty stage.

Bill:

I'm working on a similar fabrication project (CBX plenum for a blower) so I would have been interested in your progress and how you would have handled the pesky angled CBX intake tracts.

Anyway, here's some "controversial" material on single carb conversions for early GoldWings:

http://www.randakks.com/TechTip43.htm

Much of this would apply to the CBX.

To answer your specific question - a "log" manifold is the only reasonable option, but the carb would need to be more centrally attached as in this Suzuki 4 cylinder turbo manifold:



(Even better would be a carb oriented as a straight shot from the rear...no quick picture at hand for that).

2 or 3 carbs would be better. 6 would be best :)

bdento59 wrote:I'm in conversations with fabricators about developing a 1>6 intake manifold for single carb operation. I will update as necessary if it progresses past the feasibilty stage.

What on earth for ? The X is all about 6 of this and 6 of that. Tis what makes it what it is mate !!

Mike Cecchini wrote:

bdento59 wrote:I'm in conversations with fabricators about developing a 1>6 intake manifold for single carb operation. I will update as necessary if it progresses past the feasibilty stage.

What on earth for ? The X is all about 6 of this and 6 of that. Tis what makes it what it is mate !!

I must admit, I'm in full agreement there.... but then different strokes for different folks I spose...