Bosch electronic ignition & Magnecor leads

[c.a.c131]

My silver S3 Super is just back from getting a big service, the 1600/TC didn't have electronic ignition it was only on 2000/TC.

I was very lucky to find someone with a good Bosch electronic ignition system & my mechanic fit it along with new Magnecor leads it starts better & runs better too

[mirafioriman]

Getting rid of points is one modification I think any older car should get

[c.a.c131]

It had the original magneti marelli points, spark plugs The timing belt was the original one too It only has 21000 miles on it.

[sid131]

Well done Christopher Bosch is the best ignition for 131s
car looks really well very very clean underneath

[beardy bloke]

I have an occasional problem re-starting my engine when hot . It is a 1600t/c which has been put in a 1975 Tvr . I was wondering if switching to electronic ignition would help/ cure this problem ?. Fairly sure that fuel is getting through but I usually get annoyed when this happens so may not have checked properly , I did have a problem with lack of air to the carb but I think I have fixed this with some additional ducting . New points , coil,  plugs and leads 2 years ago . Advice as to where to start tracking down the problem would be appreciated .

[mirafioriman]

Need to see what's missing when the problem occurs. It could be lack of fuel or lack of a spark.

[beardy bloke]

This might sound stupid , but I have a cheap inline fuel filter between pump and carb , it seems to me when I have the problem with staring this is completely full . When the car has been sat for a while this level drops and then the car will start . Is the pump running at too high a pressure and when filter is full it will not run and so does not pump?. Pump seems not to be running when I have this happen and withdrawing a small amount of fuel enables the car to start . Am i correct in assuming this is creating a vacuum and all I might need is a pressure regulator?.

[mirafioriman]

What type of pump is fitted?

[beardy bloke]

I have fitted an electric fuel pump , not sure what it means exactly but it is an interrupter type pressure 4-6psi . I fitted this because the original seemed to be lacking on high demand , this one is more than capable , still a little bit short if you really push !, I am thinking now that I should fit a pressure regulator as originally advised , what do you think?.

[mirafioriman]

What carb(s) is the engine running?

[Tas131]

I have fitted an electric fuel pump , not sure what it means exactly but it is an interrupter type pressure 4-6psi.

Are you running a return line from the carb to the tank? Webers only like 2-3 psi, I've got twin IDFs on my 2 litre, this is the reg I use:
http://www.ebay.com.au/itm/HO12-804-Holley-Fuel-Pressure-Regulator-Tumble-Polished-1-4-psi-Universal-/321425530809?pt=AU_Car_Parts_Accessories&hash=item4ad6745fb9

[beardy bloke]

The carb is a weber 32Adf .I am assuming from your advice that I should use a pressure regulator to reduce the flow to 2-3psi . I can get one locally which is adjustable , this what I was going to do and hope this fixes the problem , anything I need to now about which one I should use as there are two sorts available.

[mirafioriman]

On the standard carb I'd just use the standard mechanical pump. As long as it is functioning correctly it should do the job fine. When I had an electric pump (with twin 40 Dellortos) I had a filter king regulator fitted. I Did set the pressure but can't remember what to now.

[beardy bloke]

Mechanical pump was not working when I got the car , the electric pump fitted was poor and did not feed enough fuel at high revs this one does supply enough fuel but maybe at cost of my starting problem. There are no issues when general running in fact goes very well and I would not want to reduce pressure too much if this causes loss of fuel delievery at high revs . I have seen a data sheet on this forum which implies that the mechanical pump was set at 6psi , how come 4-6 is too much?.

[beardy bloke]

I have tried fitting a pressure regulator , set at 2 psi , car still pulls very well no problem . I still have a problem starting but only when the engine is hot .
Is it obvious that I could try reducing pressure still further as fuel filter is still over full , and also I have noticed that when I have this problem the fuel pump seems not to work , I was wondering if float level might be too high as I have adjusted to make sure high flow passages are covered , no problem with fuel over topping the carb , and I was running the 4-6 psi pump unregulated for 6 months .
A fiat x/19 owner suggested I should look at the air in the carb being too hot as they have this problem ?, also anyone know where I can get I proper air box as shown in the picture at the start of this thread as I am sure that would be a help to get more air into the carb.
Any advice would be appreciated.