72super ·
Have a 72 superbug that when it is revved hard it blows some black smoke. Have been told it may be running a bit rich. However when it is revved up slowly it is Ok, only if it gets a gutful. How do I adjust the mixture? etc all help taken
Aussieveedubbers · Tech Talk
blowing black smoke?
https://forums.aussieveedubbers.com/threads/53735/blowing-black-smoke
EgeWorks ·
What sort of carburettor(s) does it have?
72super ·
solex pict 34 on a 1600tp
[ Edited on 27-6-2006 by 72super ]
[ Edited on 27-6-2006 by 72super ]
68AutoBug ·
Hi,
It sounds like the Accelerator pump on the carburetor is doing its job....
The harder You press the pedal...
the more fuel it pumps in...
otherwise You would have a dead spot....
A rich exhaust is good for Air Cooled VWs...
A Lean exhaust spells trouble for an air cooled VW...
I wouldn't be concerned....
My Beetle and My Sons are both running rich and the exhausts are sooty....
At least We know the valves aren't going to drop off ,due to a lean mixture...
cheers
Lee 68AutoBug
72super ·
lee. when you rev harshly it HAS got a dead spot
68AutoBug ·
Are You running a 009 distributor...??
as 009s are crappy compared to a Vacuum/centrifugal advance distributor..
The 009s relies only on the centrifugal mechanical advance and its just not quick enough...
with the original VW type dizzy, the vacuum cuts in as soon as You hit the throttle
and advances the ignition timing...
also 009s Have to be timed at 32 degrees approx with the engine running at maximum advance...
cheers
Lee
as 009s are crappy compared to a Vacuum/centrifugal advance distributor..
The 009s relies only on the centrifugal mechanical advance and its just not quick enough...
with the original VW type dizzy, the vacuum cuts in as soon as You hit the throttle
and advances the ignition timing...
also 009s Have to be timed at 32 degrees approx with the engine running at maximum advance...
cheers
Lee
68AutoBug ·
If You are running a standard distributor...
then apart from the ignition timing...
Your Solex could be running too rich at Idle....
so the fuel mixture IS too rich when You hit the throttle..
Lee
then apart from the ignition timing...
Your Solex could be running too rich at Idle....
so the fuel mixture IS too rich when You hit the throttle..
Lee
CHADMYSTER ·
standard distributer, which screw to adjust for mixture?. (72 super at work/ chadmyster at home!)
Bizarre ·
72super ·
thanks
68AutoBug ·
Yes, Rob & Dave know their stuff....
I didn't realise the 34 PICT 3 was so complicated to tune..
Lee
I didn't realise the 34 PICT 3 was so complicated to tune..
Lee
72super ·
yes i have printed out instuctions. will see how i go