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Author Topic: Solex 35 phh Idle/Pilot/Slow Running Jets  (Read 256 times)
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Beckerman67
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Posts: 11



« on: 08 June, 2020, 09:15:20 AM »

Hello

I have recently bought my first Fulvia 1.3s Series 2 1972.
My question regards the Idle/Pilot Jets. Firstly, with regards to their design, should the small hole at the base connect through to the large hole at the top where the screwdriver slot is? If it should then all of mine are blocked!
Secondly, the size marked on them is 47, however, the 4th edition Instruction Book states 47.5?
Can anyone shed any light please.

Thanks


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lancialulu
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Posts: 3913



« Reply #1 on: 08 June, 2020, 09:38:25 AM »

Yes they should be blocked! they may be 47.5 but ou cannot stamp the .5 and this is only 5/1000 of a mm so not really significant in the scheme of things. You tend to adjust the idle jet if necessary in integer steps of 2 or 5 if this jet needs to be changed to improved the transition phase from idle to main jet with today's more volatile fuels.
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Its not the winning but taking part! or is it taking apart?
1955 Aurelia B12
1967 Flavia Vignale iniezione
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia 1600HF
1972 1600 Fulvia Sport
1979 2500 Gamma Coupe
1988 Delta 1.6GTi
1998 Zeta
Beckerman67
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« Reply #2 on: 08 June, 2020, 09:59:38 AM »

Great Thanks. Problem solved!
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davidwheeler
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« Reply #3 on: 09 June, 2020, 09:09:01 AM »

If there is hesitaion on acceleration at about 2000 rpm you should increase the size perhaps by 25%.   I did on my series II 1600 with great improvement.
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David Wheeler.  Lambdas, Aprilia, Fulvia Sport.(formerly Appia and Thema as well).
lancialulu
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« Reply #4 on: 09 June, 2020, 10:12:40 AM »

If there is hesitaion on acceleration at about 2000 rpm you should increase the size perhaps by 25%.   I did on my series II 1600 with great improvement.
This is mostly related to 1600's. I and a few other 1600 owners now run at 55 or 60 for improved transition with the solex 42's. Not heard much about standard 1300's having this problem with solex 35's when everything else is in order (valve timing, ignition timing, good compression, and valve tappet clearances).
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Its not the winning but taking part! or is it taking apart?
1955 Aurelia B12
1967 Flavia Vignale iniezione
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia 1600HF
1972 1600 Fulvia Sport
1979 2500 Gamma Coupe
1988 Delta 1.6GTi
1998 Zeta
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