Distributor components.

[SpitfireGeorge]

Hi Guys,

When tuning experts discuss distributors they mention changing tbe bob weights and springs. I have never seen any advertised for sale. Anybody know who sells them?

Cheers,

Brett

 

[cliff.b]

7 minutes ago, SpitfireGeorge said:

Hi Guys,

When tuning experts discuss distributors they mention changing tbe bob weights and springs. I have never seen any advertised for sale. Anybody know who sells them?

Cheers,

Brett

 

As far as I am aware it is the springs that can be changed, not the weights and also the stop that limits maximum advance could be modified. Moss were selling a pack of various springs a couple of years ago and may still do so.

[Pete Lewis]

about the only possible is the   distributor doctor 

but there is WHY   without a test rig you will be playing a guessing game and a chance to wreck your pistons 

if you have no experience in this its is seriously best  left alone to triumph specifications .

its relatively easy to change centrifugal weights on a  lucas but impossible if its a delco

changing springs is simpler but you need to have the correct data to know what you are trying to achieve

i would find something else to worry about 

Pete

[SpitfireGeorge]

I bought a distributor off ebay suitable for all 1300s but the mk4 has different advance characteristics. Just wondering if mine is a mk4 where I can get the bits to convert it to a mk3 type. Mine is a Delco on a mk3 Spitfire.

Cheers,

Brett

[Colin Lindsay]

http://distributordoctor.com

The link to Pete's suggestion; I've used them before and they'll supply the correct springs and other bits to restore your distributor to factory settings.

[johny]

10 hours ago, SpitfireGeorge said:

Hi Guys,

When tuning experts discuss distributors they mention changing tbe bob weights and springs. I have never seen any advertised for sale. Anybody know who sells them?

Cheers,

Brett

 

You should be able to easily check if your dizzy is within the quite wide range of limits listed in the manual using a strobe and friend👍

[Pete Lewis]

you cant change the bob weights in a delco without mending to destruction 

you have to buy the assembly and change the whole spindle assy.

you can replace the springs 

and is the vac unit settings same/similar between mk3 mkIV whilst this is a economy device the amount of advance it gives is quite critical 

(sorry ive not looked at the data in the WSM ) 

and testing data needs a careful read as its often done decelerating or you again get it all very wrong 

Pete

 

[johny]

I think that the manual figures give so much leeway (eg. more than 3º at some revs) that a rolling road and professional set up is probably the only way to really optimise your cars ignition timing...

[SpitfireGeorge]

Thanks Guys. Think I will leave it unless running is poor. Cheers.

[johny]

As I say blag a strobe if you havent got one and see the timing at various revs - that would at least show if your dizzy is miles out...