Can anyone tell me how to adjust the SU carbs to get the best performance out of them?

Any tricks or tips in doing this?

Get someone else to do themROFL

Seriously, it will all depend on what configuration you are running. If I follow the book, mine will run like a pig as I am running a cam and advanced timing. It states that you need one turn on the screw underneath. I found that mine will run better with two turns.

I think it is also essential that you get a balancing tool to get them right. Once you achieve this, car will run nice and smooth

:cheeky:

Biker

Just another word of advice

If you start adjusting things such as balance, air mixture, etc, take a note on where the settings are before you start e.g screw in mixture nut but count the turns until it is seated.

If things go wrong, at least you can get it back to where you started

:classic:

biker

I thought about what you said so I decided to talked to the guy who rebuilt my engine. He has a ballancing tool and is familiar with dual carbs. He new what was needed when I told him how it was running. He wasn't the one who took the engine out or put it back in, he only rebuilds but offered to set the timing and adjust the carbs for me at no additional charge.

He use to own a Z long ago so I think he enjoyed working on mine.

Thanks for the help

If you decide to learn how to adjust them E-mail me and I can walk you through the procedure. There is a tape available still I believe on this and other things at Z Therapy . They are the best source .:classic:

Yes

You want to acquire the video from ztherapy.com. It is detailed and complete.

Remember, the engine must itself be in tune to tune the SU's.

Start with a good valve adjustment, then plugs, points, timeing.

Then set the mixture of the needles, after checking the chokes release freely. All this is done with the air filter removed along with the filter cover.

THE ADJUSTING OF THE SU'S IS A REPETATIVE PROCESS.

That is to say, you gradually close in on a fine tune.

Consider getting a color tune device/ and/or use a sensor in the tailpipe for air fuel mixture.

buy a book covering this procedure, take notes when viewing the video tape of Ztherapy.

Good luck.

Lowell

I found a guy, next town under/over who restores old cars. He’s familiar with the dual carb process and has the equipment as well.

He is going to show me how to do it the first time so I’ll take good notes but I like the idea of this video. If you own a Z you should have the tools and documents to maintain it.

I will get the video and start looking for the gages/tools to adjust the carbs. Thanks for the feedback. If you know where I can get these gages, let me know.

Thanks again,

Ken

Originally posted by sapruns

If you know where I can get these gages, let me know.

MSA sells both the Synchrotester and the Color Tune:

http://www.zcarparts.com/store/merchant.mvc?Screen=CTGY&Store_Code=TZS&Category_Code=TE

I bought my colur-tune from r.d.enterprises www.rdent.com ray had the best prices. I bought the uni-sun to ballance them at the local parts store , go to the performance section. Edelbrock made mine. $25.00 . the uni-sun is a must the colur-tune you can do with out.It is a good tool and one you will use, but if cash is tight you can do without it , it just saves time . The reason that the adjustment biker was talking about was so different is that most likely the throttle shafts are leaking air due to ware either that or a vacume leak. :classic:

Hi Beandip

If I am suffering from too much air getting past worn parts, how can I check this?

Carbs seem to run pretty good except I do get a bit of gunk down around the rubber hose from the bowl to the Carb. Probably seeping fuel that picks up road grime.

Does anyone in Aus know where you can get a colurtune and what is the cost of these.:cross-eye

Thaknks in advance

Biker

Originally posted by biker

If I am suffering from too much air getting past worn parts, how can I check this?

Biker

Scott Bruning in his tune-up video mentions just slapping some grease at the end of the worn shft as a way of reducing the air leak.

Thanks Mike