Discussion
Right my tiger supercat with a 2 ltr blacktop has been great apart from Alternator problems which are not sorted. The car was also dynoed in March and thought everything was sorted. But driving the tiger back from haynes it kept kangrooing and stalling when pulling away, We just checked the carbs and the rear are sucking 10KG of air in and the front carbs are pulling 7KG of air. I hope this would be the problem. now just having a look online to check how to adjust the carbs as I have never had a issue with them in the past
any tips?
any tips?
Duh sorry had to edit this from another fourm when asking, I have twin 45 webbers.
A few issues I have noticed playing about with the car. trying to adjust the car mix screws so all are pulling the same amount of air in. back to carbs 10kg from carbs 2 7kg on my carb synchroniser.
Managed to adjust cylinder 2 or second carbs from the front would adjust to the same as the rear 2 cylinders But the front mixture screw would not make any difference when asjusting the screw.
this problem has only just come up and I have a TD booked in 2 weeks, my first in 5 years, Not great timing
to add all 4 should be the same when using the carb synchronisers when on idel. and it's hard to get the bloody thing to idel well now.
Also the rev's come down very slowly when revved
A few issues I have noticed playing about with the car. trying to adjust the car mix screws so all are pulling the same amount of air in. back to carbs 10kg from carbs 2 7kg on my carb synchroniser.
Managed to adjust cylinder 2 or second carbs from the front would adjust to the same as the rear 2 cylinders But the front mixture screw would not make any difference when asjusting the screw.
this problem has only just come up and I have a TD booked in 2 weeks, my first in 5 years, Not great timing
to add all 4 should be the same when using the carb synchronisers when on idel. and it's hard to get the bloody thing to idel well now.
Also the rev's come down very slowly when revved
Edited by RemaL on Wednesday 14th July 20:56
The mixture screws won't affect carb balance. just the air/fuel mix when the throttles are closed.
There should be a screw on the linkage between the two carbs that ensures that when you press the throttle the butterflies open at the same time.
(note, I've only just started fiddling with carbs so this is my take on it)
you should check fuel pressure too. I have an inline gauge and am reasonably local if you need it
There should be a screw on the linkage between the two carbs that ensures that when you press the throttle the butterflies open at the same time.
(note, I've only just started fiddling with carbs so this is my take on it)
you should check fuel pressure too. I have an inline gauge and am reasonably local if you need it
As Glade said you are looking for an adjustment or clamp on the throttle butterfly shaft where the two carbs join. This may have come loose allowing one carb to open more than the other. It will be a fiddle to set up but you have the tool so release the clamp and adjust each carbs throttle stop so the engine is ticking over at the speed you want and both carbs are pulling the same air flow. You should then be able to clamp the shafts so they open together. Check the airflow again at part throttle to make sure they are opening together...they may not, due to wear in the shafts, so you may need to adjust the shaft clamp to compensate.
Steve
Steve
right following info from your guys and a chap at tipton dyno we went to in March. I managed to get all the carbs balanced. So thats done.
Was told as we had played with the mixture screws to get the car to idle ( ok sorted) and turn off 1 cylinder at a time so it misfires/cuts the cylinder off then screw back until it cuts in. We did this with all 4 cylinder.
But when you blip the throttle to say 2k, the rev's wil stay high and very slowly return to say idle speed
What we do now? we have checked and found no air leeks.
Was told as we had played with the mixture screws to get the car to idle ( ok sorted) and turn off 1 cylinder at a time so it misfires/cuts the cylinder off then screw back until it cuts in. We did this with all 4 cylinder.
But when you blip the throttle to say 2k, the rev's wil stay high and very slowly return to say idle speed
What we do now? we have checked and found no air leeks.
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