How do you think the Holley one barrell that came on the slant six Dodge/Plymouth would do on these Wings?

Also, I would like to add, the machinist that did the work for me on my airbox has indicated that he would build an airbox for any carburetor for a reasonable cost. He indicated around $200.00 starting price. This may not include the runners.

All he would need is a drawing with the dimensions.

 

Dennis

As I recall that carb was wide and tall so it might be a tight fit in there but if you can squeeze it in and get parts for it you should be able to use with some tweaking.

 

Vic

I fully agree with Cowboybob that the Holley will rob top end power but it may do the job for low and midrange power although nothing will match a set of properly tuned stock carbs.  For some interesting information on using carbs that are too small have a look at this; http://www.gl1200goldwings.com/viewtopic.php?f=93&t=4113

 

Vic

Thanks for the input on single barrel carbs. I am sure I will sacrifice some top end, but I am not interested in top end. 70 miles an hour is about my top end anyway. I will be thrilled to just get the trike to run decent up to 70 or so.

You're definately not a racer so that really lowers the demands on a carburetor so what you have just may do the trick.

 

Vic

Cowboybob, what you say makes sense.

I ain't trying to be agumentive here, but hopefully to inspire some debate about carburetors which will help me to learn something about them. I am the first to admit that I ain't the sharpest tack in the nail keg, so bear with me on this.

According to Google, an 1100cc engine figures out to be 67.1 cubic inches.

If a 67.1 cubic inch engine runs at 10,000 rpms, then that engine should only need 671,000 cubic inches of air per minute. Is this right so far? Now, a 600 cfm carburetor can supply 600X1728 cubic inches per minute.

600X1728=1,036,800 cubic inches. This looks like a 300 or 350 cfm carburetor should meet most requirements of these bikes.

Holley recommends undersizing the carburetor regarding cubic feet. I don't know why, but they do. Please share some thoughts on this, and let's just see maybe what we can come up with here. Thanks, Dennis

 

According to Holley tech support they are specifying and even smaller carb for our bikes than Google http://www.holley.com/TechService/FAQ.asp?category=Carburetor if you calculate the formula.  Seems awfully small to me.

 

Vicv

Cowboybob, sheesh, 5 or 6 thousand rpms? Not at my age, no way. I ain't seen that many rpms on nothing but a dremel. LOL

I have a friend over at Greenwood, S.C. that has a 78 wing with the CCI conversion, and he loves the thing.

He is an ASME certified mechanic, been at it for years. He indicated like you have said, over 70 or 75 miles an hour, there is a less friskie response, but overall, he is happy. But heck, I don't have the slightest intention of seeing this old bike at the rpm's you mentioned.

I like Vic's posting earlier about the Weber progessive 2 barrel. I am hoping to find one of them pretty soon and maybe see how they do.

Do they make a carburetor with variable jets, dependant on the demands of the engine? Just wondering.

They do make carbs with variable jets they are called metering rods or power valves.  The carbs with metering rods have stepped brass rods that go into and out of the jets according to engine load/vacuum signal.  The power valve works on the principle of vacuum opening a valve which allows more fuel to flow under high load/no vacuum conditions.  Holley's usually have the power valves and Carter and Rochester carbs usually have the metering rods although they can also be found in many other carbs.

 

Vic

This old teapot, Holley model 1901 has the power valve. This thing screams at high RPM, but idling is a different matter, it acts like it is starving for gas. I am gonna change the fuel pump and look into some other issues and see if that can be resolved.

Maybe it set so long that I cannot get the idle circuit real clean. Do you know of anyone that has the hot bath dip? Do you know of any secrets of cleaning the idle circuit?

Thanks, Dennis

btw, have you ever heard of the FISH carburetor?

Try boiling it in lemon juice. Just be careful, as this stuff tends to boil over pretty easily. Also smells like hell, so make sure and do it outside. It will also take off any finish that was on the carb.

You may have some dirt in the slow speed fuel passages that will need to be cleaned out with carb cleaner or a small wire or even lemon juice as millerdog suggests. I would also urge you to read and understand this post very carefully http://www.gl1200goldwings.com/viewtopic.php?f=93&t=4113 as it clearly defines why the small carbs are so difficult to tune on these engines.

 

We have discussed the Fish carb here on several occasions and have come to the conclusion that it is marketing hype alone that makes these carbs so notable.  In practice these carbs just don't deliver as they say they do and it's a fantasy to think that they can.  Check this link for more info; http://www.mikebrownsolutions.com/bccfish.htm

 

Vic