Torsten
Freshman Member
Offline
Hello there,
My friend and I were working on the ignition of my BGT, because it ran very rough. As static and dynamic timing didn't work out well, we started to take a closer look on the distributor. It is a Lucas 25D with the vacuum advance on the inlet manifold of the dual SU HS4 carbs. We reset the contact breaker points, swapped the rotor, igniton coils and spark plugs, but still the car runs a little rough when idling and driving. We suspect that there might be a problem with the vacuum advance, which starts already at 1000 rpm idling.
My question now: is it better to have the vacuum on the inlet manifold or on the carbs (ported vacuum)? If so, where does the hose from the distributor connect to on (one of) the carbs?
Some extra info (and an extra question): my car is a US-spec model year 1971, with a rebuilt engine without the emission control stuff and the distributor has the year 72 stamped on it. Is it possible I got the wrong vacuum unit? Where can I check if the distributor and vacuum unit match or not?
Thanks in advance!
Regards,
Torsten
My friend and I were working on the ignition of my BGT, because it ran very rough. As static and dynamic timing didn't work out well, we started to take a closer look on the distributor. It is a Lucas 25D with the vacuum advance on the inlet manifold of the dual SU HS4 carbs. We reset the contact breaker points, swapped the rotor, igniton coils and spark plugs, but still the car runs a little rough when idling and driving. We suspect that there might be a problem with the vacuum advance, which starts already at 1000 rpm idling.
My question now: is it better to have the vacuum on the inlet manifold or on the carbs (ported vacuum)? If so, where does the hose from the distributor connect to on (one of) the carbs?
Some extra info (and an extra question): my car is a US-spec model year 1971, with a rebuilt engine without the emission control stuff and the distributor has the year 72 stamped on it. Is it possible I got the wrong vacuum unit? Where can I check if the distributor and vacuum unit match or not?
Thanks in advance!
Regards,
Torsten