timing and weber again....

This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
I've got a length of 3mm silicon hose but left the main part metal as I thought if I piped the whole lot in silicon it would collapse in on itself?

can I pipe it all in flexi silicon and maybe attach it to bulkhead to stop it getting hot?
 
Hang on there looks to be a pipe fitting on the carb adaptor plate (arrowed, behind the vac pipe). Is that blocked up. That looks to me to be the one that is supposed to connect up to via a restrictor T-piece to the breather and inlet pipe.

If that is not blocked up or blocked up badly then you'll get all sorts of bother. Also, how "warm" was the engine when you set up the carb it should be _fully_ up to temperature, best is to give it a fast run not just leave it idling.
 
yep that pipe is fully blocked up by a hard brown wax/solder
engine was fast idled at 1200rpm until temp gauge read normal (half way)

setting carb up is a bit weird, if I unscrew mixture this adds more fuel and causes engine to increase in speed right...then I unscrew idle screw to settle it back down..then repeat process until mixture screw doesn't do anything to engine speed?
 
Not quite you get it so that the highest rpm you can achieve with the mixture screw is 850 i.e. either way makes it run slower then turn mixture clockwise half a turn for a leaner idle and roughly 850rpm. (see guide below)

I'd also not just warm up by idling but go for a hard drive for 10 minutes to get it fully up to temperature. But before spending any more time on it I'd make sure you have that spacer gasket fitted otherwise you'll be chasing your tail...

BTW that looks to be a new carb, where did you get it from?

Weber
 
carb was from Paddocks-came new in a sealed weber box..they had it in offer at £99

I'll take it to work today and do carb when I get back then

in that vid I just posted, I tried turning mixture a while turn both ways and nothing happened-even screwed in the idle screw 1 turn and it made little difference compared to my setup which was smooth earlier.

I'll wait for this spacer block to arrive and repost my findings

appreciate your input chaps
 
dominicbeesley said:
When you were getting no change with the mixture screw was it warm - if so (and the carb is hot to touch) I'd suspect you're getting vapour in the idle circuit of the carb.
Click to expand...

It was just after my 20 mile trip so yes engine very hot, didn't feel carb body but as I have no insulator im guessing you are on the right track.

Anything else I can do apart from my ebay purchase? Any other cars insulator block fit the weber/series3 combo?
 
got back from a 13 mile journey today. not touched it since ran rough the other day.
it seemed ok, mind you it was blooming cold outside!

checked coil and carb when I got home and both seemed reasonably cool-could easily keep my hand on both. new carb thick gasket arrived today so I'll fit this weekend hopefully
 
I did get the one off ebay as suggested but it was too short and the ends were loose-the bloke said he couldn't do them any longer.
this vac pipe was £4 from halfords and much better quality
 
Really? I got one and it fit ok, was snug but fine...anyway who cares if it works?

Is it running better now?

Just been out in mine...fookin freezing, door seals gone on passenger side and it's sleet, hail and rain coming in...
 
dominicbeesley said:
Really? I got one and it fit ok, was snug but fine...anyway who cares if it works?

Is it running better now?

Just been out in mine...fookin freezing, door seals gone on passenger side and it's sleet, hail and rain coming in...
Click to expand...

lol it's running ok at the moment thanks, slight rattle at higher rpm so I'm going to adjust valve clearences again just to be sure

new doors and seals on mine and I can still see a few gaps..think new door tops are poo.

I'll update running status after valve check 2m
 
"rattle" at high rpm might well be the engine pinking, that is the exploding petrol hitting the piston as it is still coming upwards. Retard the timing a few degrees and it should go away. You will (probably) find it does it more at medium to high revs under load. I've got mine set to just pink at about 3000rpm under heavy load with 98ron shell petrol. The higher the RON number the more you can advance, although some petrols achieve their higher ron by cheating and it doesn't work as well. The shell v-power thing seems to be best. Modern engines have a knock sensor tuned to the pitch of the pinking noise that automatically adjust the timing for the grade of petrol.

I've just ordered a full set of seals - hopefully they'll come before I go off to Germany next week (and be easy to fit) otherwise the missus will be moaning all the way there!

New door tops I got were a bit poo, made slightly less poo by slackening off the fixing buts and pulling the top in toward the body before retightening. 20 minutes of faffing like that got them sealing all way round on drivers (new top) side. Not sure I dare do it on passenger side. If I swing on that I'll just end up with an armful of rust and glass!
 
it kinda sounds like a newtons cradle does but a lot more often if that makes sense.

I'm at about 10dbtdc at the mo, if I retard does that mean take it more towards TDC on my strobe? ie 8dbtdc for example?
 
You must log in or register to reply here.

Similar threads

styleruk
2.25 petrol rough idle
2 3 4
Replies
60
Views
3K
styleruk
styleruk
J
ZENITH CD175 TEMPERATURE COMPENSATORS HELPFUL INFO
Replies
8
Views
2K
hef19898
hef19898
D
2.25 Petrol odd timing
Replies
12
Views
2K
rob1miles
R
MikeFl4
P38A M51 Diesel – Its just not running right!! (video explanation for ease)
Replies
15
Views
3K
Datatek
Datatek
northern scot
problems at idle/low revs
Replies
11
Views
940
Gord Wedman
G
Back
Top