Round top carb rebuilding - anyone in Qld ?

[aegean]

I picked up a set of round top carbies off eBay (US$87.00) and want to have them checked out and possibly rebuilt before putting them on my 260. Can anyone recommend someone, preferably in Qld as I would like to have them stripped them down, then take the bodies away for water blasting ?

[modular9]

carb and gas

5 Mountjoy St WOOLLOONGABBA QLD 4102

(07) 3891 5886

 

Very quick, very knowledgable. I have taken 2 v8's,  2 toranas 6 cylinder , 1 mgb twin su ,  my Dad's jaguar twin su carbed Xj, and of course my 260z twin round top SU's.

 

I recommend them as they not only rebuilt and retuned the SU's but they regraphed the dizzy to make sure that the entire ignition and fuel delivery was sorted. Dont know if they would do them off the car but give em a phone call anyway.

[aegean]

Great ! Will get in touch with them.

[JC3007]

I would be very keen as well. Need to get my SUs rebuilt as car has sat for a long time and i am trying to get restarted. So far have narrowed issues down to fuel not getting in to combustion, so prob clogged jets or something. Before i parked teh car, i had an oil leak in one of the su's so thought i may as well get them rebuilt.

[gav240z]

I would be very keen as well. Need to get my SUs rebuilt as car has sat for a long time and i am trying to get restarted. So far have narrowed issues down to fuel not getting in to combustion, so prob clogged jets or something. Before i parked teh car, i had an oil leak in one of the su's so thought i may as well get them rebuilt.

 

If the car sat for a few years have you tried draining the old fuel? Old fuel goes off and this may cause your trouble. Try connecting the SU's (if you have an mechanical fuel pump) to an ice cream container of fuel (don't smoke while doing this).

 

I saw this tip on a show called "The Garage" on discovery with an old Ford Escort. If you smell the fuel it should smell off.

 

SU's can leak a bit of oil from their dashpots but this dampens the accelerator or throttle response more than anything. It should not prevent it from being started and would not necessarily indicate a rebuild is required.

[Zeddophile]

SU's can leak a bit of oil from their dashpots but this dampens the accelerator or throttle response more than anything. It should not prevent it from being started and would not necessarily indicate a rebuild is required.

 

If the dashpots in SUs are the same as Strombergs, it will give you a flutter when revving it up.  One of my mates bought an old range rover with the standard twin strommies on it that had been sitting for ages, and spent ages trying to work out what his 'misfire' was - put electronic ignition on it, and his boss was suggesting various ideas.  Then he called me up, I went down and had a listen, and straight away asked him to give me some ATF - topped up the dashpots, and it ran perfectly straight away.

 

In relation to the original post - if the car has been sitting for a while, and you still have the mechanical fuel pump, its quite likely that the fuel pump has gotten a bit stuck or airlocked.  Had this problem with a mates carbied toyota sprinter, and the way I fixed it was to disconnect the outlet hose from the fuel pump, and then used an air nozzle off the compressor I have in my rangie to gently pressurise his fuel tank through the filler until fuel came out the pump outlet.  Reconnected, and it started pretty much straight away.  This was after tipping petrol down the carby a number of times trying to get it to prime the pump itself at engine speed.  Just be careful not to put too much pressure at one go into the tank, as you can put a nice dent in it.  Use a rag wrapped around the nozzle to seal the pressure into the tank.

 

On the topic of air pressure, I've found many many uses for it since setting up an old A/C compressor in my rangie with a tank.  On that same sprinter, one of us dropped a bolt down the engine pipe while replacing the head gasket.  Couldn't reach it with a magnet or anything, as it'd gone round the bend and fetched up in the muffler.  So, after trying a few things, I decided to try a random idea, and pressurised the tailpipe at the back of the car in the same way you do the tank, and had another bloke holding his hand over the exhaust where the manifold normally bolts on.  Let it build up pressure for about 30 seconds, then told him to lift his hand away quickly, and presto - the bolt shot up out of the outlet about 2 feet in the air.

[JC3007]

Gav 240z, yeah i have drained and replaced the fuel. Blew out teh lines, made sure the frsh fuel was getting to the carbs. I had teh filters off and was spraying start you bastard straight down the throat and it was coughing and spluttering, but couldn't get it started on the carbs alone. Thats why i am think about the rebuild as i could have blockage in there somewhere. I did also convert to the 280zx dizzy at the same time so i know the timing could be a bit out, but to not even get a cough when i know there is spark there has lead me to this conclusion.

 

The oil leak i have is for the piston in the carb. It then gets stuck when low and i only get fuel from one carb? does this make sense. Onceit was warm, it wasn't a prob just when cold, and then i knew it was time to top up the oil.

 

The car used to be my daily driver but has sat since the marvels of company cars. However this also meant that the time i had spare to work on it vanished in to this air. But know it is time to get it going again.