Help! SU carbs...(of course) idle is at 1800 can't bring it down....

[SteveJ]

Are you using a tool like the one pictured to check your flow?

[GCSS]

I had one on there earlier when the car was running better than it is now. At this point I don't need one of them until I get the engine settled down some. It is just way too wild right now. I either have a leak or possibly unbalanced piston/needle assemblies or both. I am going to Church right now and will be back around 1:00 CST. I went to blue's videos and they are good. I plan to utilize them when I get home.

thanks

Dave

[GCSS]

well...we are rolling again!

I believe it was the needle up too far into the piston.

I got it to idle now . I adjusted it good enough to go to town and back. good...very good performance. low to no load is crappy though. I'm not going to worry about that until I adjust the valves and get the airflow meter back, and rebuild them and check the floats. at least the idle isn't gone wild anymore. THANKYOU!!!!!

you're a real champ!

Thanks again! Blue!!

Dave

[240260280z]

Very happy to help! It was great talking... your enthusiasm and energy to beat the problem is inspiring.

If you need anything else I'll be glad to help.

[Symon Capel]

On 10/9/2011 at 7:49 AM, GCSS said:

I had one on there earlier when the car was running better than it is now. At this point I don't need one of them until I get the engine settled down some. It is just way too wild right now. I either have a leak or possibly unbalanced piston/needle assemblies or both. I am going to Church right now and will be back around 1:00 CST. I went to blue's videos and they are good. I plan to utilize them when I get home.

thanks

Dave

What videos are you talking about? My Z currently idles at 3k RPMs.

[siteunseen]

Mine did that after I rebuilt the motor and put everything back together. I got the linkage flats beside the carbs in the wrong order. Shot up to 3K at start up.

Here's a picture you can double check yours to. Good luck.

 

[Symon Capel]

Does this look wrong?

[7tooZ]

Yes that is holding your throttle open. The part on the left and attached to the SU should go between the two pieces on the right. 

[Symon Capel]

2 minutes ago, 7tooZ said:

Yes that is holding your throttle open. The part on the left and attached to the SU should go between the two pieces on the right. 

Thank you I'll work on that now

[siteunseen]

Yes. Thanks 7tooZ. That narrowest stop goes on bottom.

 

[Symon Capel]

3 hours ago, siteunseen said:

Mine did that after I rebuilt the motor and put everything back together. I got the linkage flats beside the carbs in the wrong order. Shot up to 3K at start up.

Here's a picture you can double check 

That was it thank you!

Now to tune the carbs!!!

Thank you all for your help 🙂

[7tooZ]

I recommend disconnecting the choke cables and throttle pedal linkage so there is no pressure on the SU linkages.