Engine Idle Speed Again
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I have checked the vacuum hoses , no leaks as far as I can tell , the lights stay up for ages when you switch off the engine so a good sign.
I have run oil around the inlet o rings , no signs of smoke or engine speed change when I tried it with carb cleaner.
The jets are new , and driving / acceleration is really good.
The balance from rear to front at 950 rpm idle using a synchrometer is 5 , 4 , 4 , 4
I don't think there is much I can do to improve the rear carb.
below is a picture of the idle screw. Probably a daft question but is there any benefit in fitting a second idle screw on the from carb ?
thanks Steve
I have run oil around the inlet o rings , no signs of smoke or engine speed change when I tried it with carb cleaner.
The jets are new , and driving / acceleration is really good.
The balance from rear to front at 950 rpm idle using a synchrometer is 5 , 4 , 4 , 4
I don't think there is much I can do to improve the rear carb.
below is a picture of the idle screw. Probably a daft question but is there any benefit in fitting a second idle screw on the from carb ?
thanks Steve
- Concrete-crusher
- Third Gear
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Could it possibly be leaking air at the butterfly spindles and leaning off the mixture?
As I understand it there is an upgraded bearing with a better sealing arrangement. Have seen them on the -bay but have no experience of them.. I've got a bit more work to do before I get to the Weber fiddling point
As I understand it there is an upgraded bearing with a better sealing arrangement. Have seen them on the -bay but have no experience of them.. I've got a bit more work to do before I get to the Weber fiddling point
- Sploder90
- Second Gear
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- Joined: 09 Apr 2019
Mick6186 wrote:On my dellortos the screw you show in the picture is the balance screw not the idle adjust.
If weber are the same twiddling the pictured screw will adjust the idle, but also ruin the balance,
Mick
The actual IDLE SPEED setting screw is a vertical screw on the right hand side of the rear carb. It presses on an extension piece of the throttle mechanism and merely acts as if your foot is pressing the throttle pedal slightly. Your photo shows a non-standard version of the IDLE SPEED setting screw at the bottom edge of your photo.
As Mick say the main one you show towards the top of your photo, is the balance screw which you use to get the two front pistons working the same as the two rear pistons.
To answer your original question, there is no point in having TWO THROTTLE IDLE SPEED Set screws.
~~~
You don't seem to have a throttle return spring to close the throttle when you lift your right foot.
Bill Williams
36/6725 S3 Coupe OGU108E Yellow over Black.
36/6725 S3 Coupe OGU108E Yellow over Black.
- billwill
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