ignition timing on a 1.8 carb syncro

[ezzoG60]

hi guys i’ve just installed a PB head and cam and a weber 32/34 on my syncro with a GU engine…the car don’t run very well as at idle sometimes we hear a “pop” from the exhaust,like the engine is trying to stop running….a strong smell of petrol came out from the exhaust too…the car was like this even before the head/cam/carb change,but it was running a bit better,specially in torque…
my carb is settet as weber said(primary F30/AC145/MJ117 ; secondary F33/AC200/MJ127)and it’s brand new…
can anyone tell me what is the correct timing regulation for a soft tuned engine like that?
do i have to considerate the PB ignition timing or the old GU ignition timing?
thank you in advance!

[no such user]

time it as you would time up a gu engine

[ezzoG60]

even with different cam?
in your opinion,can the worng idle setting be the cause of this idle running and under load running issues?

[ezzoG60]

anyone can help me?
car still don’t run well,checked the timing and it’s ok,but it still smell of fuel when the engine is running and it consumes a lot of petrol…if i use it without running full throttle,i manage to do 7km/l…my rallye g60 consumes a lot less even when i pull it!
carb settings are still the same….sometimes when i stop the engine,it try to stay running for 1 or 2 seconds,even without keys!

[Chris S]

It sounds like you are overfuelling, but that shouldnt be possible you did leave the swirl pot & the fuel return to tank line in place didn’t you?

Or possibly either (or both) your cam (valve) or ignition timing is out.

Just out out interest how wild is the new camshaft?

This may help

http://www.vwsyncro.co.uk/data/forums/topic.asp?TOPIC_ID=1896

or this

http://www.vwsyncro.co.uk/data/forums/topic.asp?TOPIC_ID=1384

[ezzoG60]

my cam is the original PB cam,,what is the swirl pot?
i adjusted my weber like it’s written in you link,but my car,specially when thewheater is cold,sometimes barely stay running at idle and sometimes go to 1500 rpm at idle…always with the smell of petrol…

[Chris S]

The fuel (pipe) enters the fuel pump then goes to the swirl pot (mounted on the engine top front) and then from there to the carb.

I wonder could your float needle be sticking open?

Just a thought, you did block the injector holes in the PB head didn’t you? []

[ezzoG60]

sure!i made 4 aluminion caps to fill the hole and then sealed them!
my float needle..where is it?sorry but i’m not very expert

[Chris S]

In the Carb float chamber, it controls the fuel hight in the carb

[ezzoG60]

ah and you think that it can make it “drink” a bit too much?
is it difficult to modifing it?

[Chris S]

Yes it can cause flooding.

You need to check and reset the float hight if its too high

[Author]

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