Aircooled VW South Africa

Hi there, someone has experience using a Solex 31 Pict 3 on a 1600 SP.
There is some jetting work to do ?
The car ir running good but seems to be quite rich on carburation.
Any guess ?

I have
Main jet 130
Air corr. Jet110z
Pilot Jet 52.5

Before touching the carb, have you done the standard checks, i.e., ignition timing, points, valve clearances, no vacuum leaks? If any of those are not right you will have a hard time setting your carb.

Hi, yes thank you, all these check are ok.
The car idle very well, and runs well but seems to be rich in the first 2000 rpm

if its rich up to 2000rpm, then get a smaller idle (pilot) jet, maybe a 50.

Have a look here for a table of jets combinations for most VW aircooled carbs:

viewtopic.php?f=8&t=37786

And before messing with jets first set the idle mixture properly.

The car have a rock solid 850 rpm idle.
The problems is that when i drive and keep 1500 rpm steady the car sputtering and is not going well.

rich is when it looses power and feels lazy
lean is when it "pops and farts"

have you checked for vacuum leaks?

So can be lean...
Also according to this website.

http://www.vw-resource.com/jets.html#pilot

This is the picture of the spark plugs.
Seems to be lean

read the following article and then go through the other articles on their web page. Lots of good info

https://www.dragstuff.com/techarticles/ ... plugs.html

130 Main is way too big for a 1600 Single Port, you will be better off with a 125 main and 52.5 idle.
BTW I don't trust the markings on jets, most of them have been around for 40+ years, every man and his dog has fiddled and in many cases opened them up, I only trust them when I have put a gauge to measure proper.

But the idle is 52.5 right now and the car seems to be really lean.
Maybe I can put an idle 55 and a main jet 125.
Anyway I was thinking of taking the originals spark plugs, even if I'm not sure which ones.
On the engine manual (is a single 1600 coming from a motor pump) give the Bosch W145T, reading around advise all the W8AC are equivalent?
Or do I have to mount the latter since the carburettor and ignition cams are in the road version at the end?

Tony Z wrote: Fri Aug 24, 2018 6:56 am read the following article and then go through the other articles on their web page. Lots of good info

https://www.dragstuff.com/techarticles/ ... plugs.html

Thnk you so much...
So according to the article the car seems torunning Rich ( because of the dark colour of the colour of the "Plug's Base-Ring")

You got the wrong plugs.