Carbs

[civ104]

I'd be happy to recommend Z-Therapy. Their rebuilt carbs are as good and pristine as they say and their service is excellent. I couldn't be more satisfied with the set I got from them.:classic:

[tanny]

mikew,

Yes, I adjusted the wheel from totally open to closed and still the marker wouldn't rise. The marker seems to be free of any undue friction, so I think the unisyn is working. I wonder if anyone with triples has had this problem. Thanks, Victor.

[Alfadog]

How much $$$ would one expect to pay for someone to rebuild some SU carbs?

Just roughly..

[sapruns]

Well I got my color-tue and tried it out. My carbs were way out of adjustmet according to the color tune. I started with cylinder # 2 and 5 (at 800 rpms idle)and got it to a bunsen blue but it hesitated a little when I drove it. I tryed it again but increased the idle to 1000 and then adjusted it again and it made a big differance. Does this sound correct? After all that I checked the idel using the syncrometer and did a final adjustment. Learning how to maintain your of car using the right tools rather then relying on some one else is alot of fun.

To change the subject a little, if I wanted to replace the stock air cleaner with the K&N or Ramflo, what do you do with the two hoses to the carbs as well the one to the valve cover and engine block ect? No sure I want to go this route but it may it seems as if it would improve the air flow. Any advice would be appreciated.

[ZCCOR#109]

You can change the filter element but do NOT change the "back plate" that bolts to the carbs. It includes the "air horns", the metal tubes that the air passes through on the way into the carbs.

The air horns are essential to the efficient operation of SU type carbs. The backplate may be removed if separate airhorns are acquired and mounted. But then how do you mount the new air filter?

Then,...

Try fitting a remote cold air induction CAI up to the air filter box opening by some form of customizing. Then remove the orginal filter from the airbox, using the filtering of the CAI.

Note, an air box is also a key in appropriate performance of SU type carbs. Air tends to pass by the airhorns during highway speeds, not "making the turn" into the airhorns.

Just be sure that the lever on the air box is set open for summer, and you will get plenty of air to the carbs for a stock engine. If you have significant performance work inside the engine where it needs to "breath" a lot more air, then work the CAI deal by doing some engineering as previously stated.

Good luck,

[beandip]

install a K & N filter in the stock air cleaner box and the engine will perform better . The individual K & N cone shaped filters look real good but dont perform as well with out the stacks that are on the stick cleaner. As was stated before unless you are running a big cam and a stroker , you would then be running tripples, you have the set up that will work the best right now. You might look to SM needles for the 280 engine , they deliver more fuel at higher RPMs and run great at normal street Rs. just a different taper. :classic: NOTE !! New information is that the SM needles are not advisable on a Z application . They are so rich they will cause the oil in the cylinders to be washed away and premature engine failier will result. I tried them on avice from supposidly a person of knowledge. I have since found other wise. Gary

[sapruns]

I ended up doing what you suggested by getting a K&N filter for the stock housing. Its a little expensive but im told its a life time filter. They show you how to clean it for re-use. I like this setup better then modifting what I have.

Thanks for the input.

Cheers

[Murph]

How detrimental to performace is having the stock airbox removed along with the horns, just aftermarket pod style filters in their place?

That's the sorta set up on my zed (as I bought it). Would it be worth while fit some aftermarket horns?

[Murph]

Does anyone have any photos of the stock horns?

[indyzprez]

Gav240z

You are running lean or your running too much advance on your timing. Either way your on a fastrack to disaster. Check timing first (The cam co. sometimes specifies timing ). Then richen up your carbs by raising your needles. Ping is the enemy if you can hear it then you know one these conditions exists. Besides nothing uglier than piston ate up by detonation.

[mdbrandy]

Originally posted by Datto-Zed

Does anyone have any photos of the stock horns?

Do you mean this?

[Murph]

That's the one mark! Thanks for that....much appreciated.