Webber Twin DCOE 40 advice needed.

[Stuart]

That whisky must be bloody good stuff Gerry :notworthy:

[Gerry H]

[quote=""Gerry H"]Distributor adjustment is similar, i.e. set to fastest idle. /quote]

Sorry, that's misleading. You can do that if you don't have a strobe.

Get the car idling and with the distributor clamp slackened off slightly, gently turn the body first one way, then the other. The revs will rise and fall as you're altering the timing. Find the fastest idling point and nip the clamp.

This is also a test of how good your HT leads are, coz' if they're tracking, you'll soon know it as you'll get a shock.

A test for leads. Go out to the car on a dark night, or in a dark garage. Get it idling and lift the bonnet. Any tracking will show up where the leads touch anything.



Editted coz' I'm too peed to spell tracking properly first time

[Gerry H]

That whisky must be bloody good stuff Gerry :notworthy:

It's helping me think back a good few years Stu. I won't say how many

[Gerry H]

Forgot to say, if you use the light bulb & crocodile clips, you perform this with the ignition on or the bulb won't light :oops:

If you don't have a light, or multimeter, or similar, an old trick is to use a cigarette paper. Pinch the cig paper between the points then, whilst gently pulling the paper with one hand, rotate the distributor till the points just slacken their grip. You won't be far out at that for static.

[ScoobieWRX]

If you don't feel confident about balancing the carbs by listening to them either hire Gerry or get one of these invaluable devices:

http://cgi.ebay.co.uk/CARB-CARBURETTOR- ... dZViewItem

Either way it's cheap for the money Happy balancing :thumb:

[Gerry H]

Cheap it may be accurate it ain't and a bit of gash tube stuck in your ear is cheaper yet.

You boys and your fancy gadgets :roll:

[ScoobieWRX]

Where you excel mechanically with Scoobys i do the same with gadgets

When we tune Scoobs we use some very fancy gadgets i.e. Boost controllers, Det Cans/lights, Wideband AFR sensors, mapping on laptops etc... the list is almost bloody endless. Don't you make a det light for some of the chaps on here. Isn't that a gadget??

Unless you're a bit of an expert and have been balancing carbs for a long time you won't really know exactly what to listen for. The same can be said for using det cans or just listening for det. I know chaps that have been at it for years doing it by ear, and they can balance multiple carb setups down to the inth degree, but i think this is the very first time Suz has done it so why not have a bit of help by using balancer guages that don't cost much.

Why wouldn't they be accurate? :?

I bought a cheap little mechanical tyre pressure guage a couple of years ago and it's the most accurate tyre guage i've ever had. I use a dial indicator guage to check runout on my rotors down to half a thou and i didn't pay fortunes for it either. It's very accurate and i couldn;t have done it any other way.

If i were suz i would be either getting an expert in, or as she has excelled herself so far in what she has acheived i would be buying some carb balancer guages as she may need them more than once in the future, so why not give yourself a fighting chance of getting those carbs set up as damn near close as poss.

I suppose an old hand like you would screw your finger or some other appendage in the spark plug hole to check cylinder pressure rather than use a gadget like a Cylinder pressure tester. :lol: I used to use a screwdriver to listen for noisy tappets on my old mini. Doesn't mean i would do that now if i can get a gadget to help me out instead like stethoscope.

Normally i would think...you're absolutely right Gerry as you are a font of mechanical knowledge and i have total respect for that :notworthy: but on this occasion i wholly dissagree. Carb balancer guages have been around a long time.

Gadgets rule and most performance drivers and tuners today would be stuffed without them...It's 2008 not 1978 :roll:

[Suz]

Distributor adjustment is similar, i.e. set to fastest idle. Start by ensuring the points gap is correct. Determine the direction of rotation of the rotor then, the initial setting is by using a 12v light bulb with fly leads and crocodile clips. One side to earth, the other to the sprung contact. Set the crank pulley to the prescribed number of degrees BTDC. Slacken the pinch bolt so the distributor is free to turn then, if the light is on, rotate the distributor the opposite way to the direction the rotor goes until the light just goes off. If the light was off, rotate the distributor i the same direction as the rotor until the light comes on, then rotate back to put it out. It may take a couple of goes but that will be the static timing. Strobe would be good for dynamic timing and if you're pushed I have a strobe you can borrow. I also have a Colourtune somewhere.

Exhaust should be a nice steady beat, any missed beat indicates rich or weak mixture. A regular miss is slightly rich and irregular is weak iirc but it's been a while. Plug colouring will confirm.


Iirc the pump jet is the little tube that looks into the venturi. It adds a squirt of petrol when you plant your foot which has the effect of losing vacuum so, no fuel being drawn in, hence the need for a neat squirt to keep things going

HTH

I'm thinking may go see an expert for the timing as have none of the above tools and don't want to get it wrong. Also think this has some kind of electronic points system as none in the dizzy.
However will try the pipe in the carb thing and if can't get that to work a carb balancer will be the next purchase. Way i see it try the "I've probably got some of that in the garage method" first. if it fails buy a gadget.

On and the screwdriver on the rocker works - didn't have a stethoscope :-D :-D

[Gerry H]

Francis, I've just sat here for over an hour cutting and pasting quotes to respond to your above post. I gave up because I realised I was writing a load of bollox in response to a load of bollox.

This car was made when your laptop wouldn't fit in your living room. Your ear is far more better equipped at determinig slight variations in sound than some crappy four guage set up that should never have seen the light of day. and will cost

[Fast Eddy]

Suz,
I have some gadgets that may help.