BrianJT

After several years of nursing the original 1959 Herald mechanical fuel pump to keep it operating, I have decided to replace it with an electrical pump. So much choice and easy to get one that is not entirely suitable for my requirements. I would like some advice from anyone who has fitted a suitable, hassle-free pump. Ideally, the pump should be a bolt-on unit that also blanks off the hole where the old pump was fitted but I doubt if one exists.  So, what is recommended? All replies gratefully received.

Hi DavidB, Thank you. I'll have to see if the dimensions are given. Brian

Hi DavidB, Thank you. I'll have to see if the dimensions are given. Brian

Hi to all correspondents and non-correspondents, I'm still trying to obtain ANY info re. the actual physical dimensions of the front and tail pipe and the silencer that is currently being used on a 1200cc Herald successfully. My Internet searches only reveal the shapes, not the dimensions. Thanks.

Hi Casper and Andy, Some useful info here - thanks a lot. Brian

Tank you again, Casper. Brian

Thank you Rob. Brian

Thanks for that, Casper.

Hi, My 1959 Fairthorpe Electron Minor is based on a 948cc Herald but now uses a 1147cc, re-bored to 1174cc, engine. The original supplied exhaust system, from whatever car I don't know, was replaced with a side-exit silencer that worked satisfactorily for me. When I started to re-build the the car in 2009, I replaced the silencer with a stainless steel version made to the same dimensions as the one used previously. Now that I am running the car, I find that the new silencer is very noisy and the car lacks power - 60mph flat out on the M11. Can members with 1200 Heralds kindly supply me with all details of the exhaust system - dimensions AND part numbers, please as I have to make certain that I can fit items into the available space. My original system had a tail pipe that looped over the axle - is this true of the 1200cc Herald? All answers gratefully received and acknowledged. Brian

Hi Casper, Thank you for the info. At present, I can't justify the cost of replacing carbs and/or manifold as I have just spent several hundreds on having the H1 carbs re-built. I ran the car at something like 350 miles a week for five years after fitting the re-bored 1147cc engine and had no problems. At the time, the exhaust consisted of a short front/down pipe with an over the counter 4 litre volume muffler emerging from the side under the driving seat. The exhaust was not noisy and I had sufficient power to meet my commuting requirements. I only replaced it when I started a wheels-up rebuild in 2009 and had a stainless steel muffler built to the same external dimensions so that it would fit in the same space. Nothing else was changed and that is why I'm seeking info on what members with 1200cc engines are using. Incidentally, the exhaust manifold matches item 6b on the diagram from the 948cc link. Regards, Brian

Thank you Alec, that's very useful information. It shows how getting just a snippet of - usually incomplete information, as in the vacuum not used on racer - can create more problems than it resolves. Brian

Hi to all, A long overdue update following illness and hospitalisation of my other half - still ongoing but progressing. Previous posts re my car revealed that the car is a 1959 Fairthorpe kit car that uses Herald and Standard 10 parts. Following my last post, I replaced the points/capacitor with an electronic module and changed the plugs back to 3/4 inch reach from the previous 1/2 inch ones that I had been using. The result of these changes, without altering timing or mixture settings, was an increase in idle speed to about 2000 rpm. I chose not to make any other changes before an upcoming club gathering and then clocked up about 200 miles on the round trip without problem. The fast idle has still to be sorted out - suggestions welcomed - but I've now realised that an upper limit of 60 mph on the M11 is probably due to the unmatched exhaust system. However, the plugs were not at all sooty so 3/4 inch are better. The original supplied exhaust system, probably Standard 10, has long since disappeared and I chose to use a side exiting silencer just before the O/S rear wheel with a short front pipe. It's very noisy and, I believe, needs to be replaced by items that are more suitable to the 1147 rebored to 1174cc engine that I am now using. So my most immediate need now is to obtain details of the exhaust system item sizes as fitted to the Herald 1200 cars. If anybody has the original Stanpart, or whatever, part numbers for the muffler, tailpipe and the front pipe (between the muffler and exhaust manifold), that would also be very useful. I have come across a formula that gives guidance on the total muffler and front pipe volume which should be between 2.5 and 3 litres - my present, noisy muffler has a volume of 4 litres so this really could be the cause of noise and low power - all comments appreciated. The calculated volume of the muffler for the 1200 cc engine is just over 2 litres thus leaving 0.5 to 1 litre for the front pipe. As usual, all comments will be gratefully received and I'll post a photo of the car when present pressures are reduced. Thanks to all in advance.

It's obvious that some more investigative work is required but I'm crossing everything that replacing the points/capacitor with an electronic version tomorrow will sort out my immediate problem. Although the vacuum capsule is punctured, I have sealed off the end of the tube that is connected to the rear carb. so there shouldn't be any air getting in that way. Update to be posted later.

Many thanks for the last two replies both of which have opened up a new can of worms for me. Re. the vacuum advance, I was told by someone in the know that although my capsule was punctured, it didn't matter because it was only active at low revs. This claim was verified by another advisor who said that when he used to race cars, the capsule was deliberately made inactive. Do these two claims make sense or should I therefore fit a non-punctured capsule? I don't know what the number on the DM2 is but it's the same that was on the original 948cc unit that was transferred to the re-bored 1147cc unit that replaced the 948cc unit in 1973. It was then used until 1978 without problems before being laid up (abandoned in the garden is a better description) and eventually restoration started in 2009! The original 948cc unit was delivered in August 1959.

Hi all and thank you for the two H&H prices sent - they seem to be what I was expecting. I've ordered an electronic ignition module as a stripdown of the DM2P4 did not reveal as much wear as the performance had been suggesting and I'll see what results from fitting it.