Hi, can anyone help me?
I have recently purchased a pair of what I believe to be C35 PHHE carbs from a '71' 1.3s and have fitted them to an old Nissan that i race, but I am having trouble finding any literature on them. Can anyone tell me how or offer any advise on how to set these up as I'm having a nightmare with them.
Any help is much appreciated
Stuart
Solex C35 PHHE
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Paul de R. Leclercq
Re: Solex C35 PHHE
The tragedy about Solex is that the company went bust AFTER the Fulvia was made rather than before.
As far as I am aware, there are no parts available.
When we modify Fulvias, we bore out jets or with air-correctors, we fill them will solder and re-drill to a smaller size as necessary.
You have no doubt noticed the imbecility of the design in that the main jets are removed from the bottom of the carburettor?
My advice would be to find a pair of Dell'Orto 35 DHLBs.
Best of luck
Paul
As far as I am aware, there are no parts available.
When we modify Fulvias, we bore out jets or with air-correctors, we fill them will solder and re-drill to a smaller size as necessary.
You have no doubt noticed the imbecility of the design in that the main jets are removed from the bottom of the carburettor?
My advice would be to find a pair of Dell'Orto 35 DHLBs.
Best of luck
Paul
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joe speck
Re: Solex C35 PHHE
Aha,
Solex C35 carbs, I have them fitted to my triumph spitfire. They are good carbs in my opinion, they do have this painfull thing where you get a face full of petrol everytime you want to change the main jets, agreed. However main jets are suprisingly easy to find. Weber downdraught main jets are infact identical. Any decent carb specialist will supply them and they are cheap. Joy is they come in small increments so you can get them dialled in quite well, I run 120's with a 121 on no. 4 cylinder. Emulsion tubes are the bit I have found most dificult . again solex downdraught carbs use the same things but I have found that I have had to solder them up and redrill them! The carbs themselves come with all sorts of choke sizes from 29 to 32 depending on whether they are phh's or phhe's or phhe7's etc. Best thing to do find measure the choke size that you have acurately and work from weber tuning guides to establish the rest.
I have bought a couple of sets cheaply and found i have three different idle jet sizes.
Remember, the carburation you require is dependant on the camshaft and head work you may or may not have. std camshafts will reqiure richer main jets that will produce very little power increase. If you have a lazy cam, you may well just not need twin chokes.
Joe
Solex C35 carbs, I have them fitted to my triumph spitfire. They are good carbs in my opinion, they do have this painfull thing where you get a face full of petrol everytime you want to change the main jets, agreed. However main jets are suprisingly easy to find. Weber downdraught main jets are infact identical. Any decent carb specialist will supply them and they are cheap. Joy is they come in small increments so you can get them dialled in quite well, I run 120's with a 121 on no. 4 cylinder. Emulsion tubes are the bit I have found most dificult . again solex downdraught carbs use the same things but I have found that I have had to solder them up and redrill them! The carbs themselves come with all sorts of choke sizes from 29 to 32 depending on whether they are phh's or phhe's or phhe7's etc. Best thing to do find measure the choke size that you have acurately and work from weber tuning guides to establish the rest.
I have bought a couple of sets cheaply and found i have three different idle jet sizes.
Remember, the carburation you require is dependant on the camshaft and head work you may or may not have. std camshafts will reqiure richer main jets that will produce very little power increase. If you have a lazy cam, you may well just not need twin chokes.
Joe
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Stuart
Re: Solex C35 PHHE
Hi Joe, thanks for the info about the main jets being the same as Weber jets I was unaware of this. As for the jet sizes I will worry about that later. At the moment when you free rev the engine it doesn't kick down properly as I am having trouble getting the carbs to balance properly. I don't suppose you could offer any advise on this.
Thanks
Stu
Thanks
Stu
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Paul de R. Leclercq
Re: Solex C35 PHHE
I have written somewhere about the procedure we use at the garage.
Basically you disconnect plugs 1 & 2 and run the engine just on 3 & 4. You then optimise the idle mixture screws (which also influence the pick-up circuit).
Repeat the performance for cylinders 1 & 2, disconnecting 3 & 4.
When all is optimised, my trick is to turn the balance screw until the engine is running its slowest. If your spindles are not twisted, then the carbs should then be in balance.
During this procedure obviously you will have to adjust the idle stop screw as necessary.
If the carbs are balanced, after a blip of the throttle, the engine should slow down to idle quickly and notin stages.
best of luck
Paul
Basically you disconnect plugs 1 & 2 and run the engine just on 3 & 4. You then optimise the idle mixture screws (which also influence the pick-up circuit).
Repeat the performance for cylinders 1 & 2, disconnecting 3 & 4.
When all is optimised, my trick is to turn the balance screw until the engine is running its slowest. If your spindles are not twisted, then the carbs should then be in balance.
During this procedure obviously you will have to adjust the idle stop screw as necessary.
If the carbs are balanced, after a blip of the throttle, the engine should slow down to idle quickly and notin stages.
best of luck
Paul