Distributor spec for QED 420 or Kent L14 cams

[promotor]

As above I'm currently chewing on distributor spec for a 1700 T/C with 280degree 420" lift cams - this covers QED 420 or Kent L14 cams.

What are peoples experiences? With modern fuel I'm guessing the initial advance needs to be a bit less with a bit more mechanical advance to give the same overall advance?

Having checked the Aldon 103TC dizzys they come with 12/24degrees mechanical advance, whereas an original Lotus dizzy has 8/16 degrees.

Which is best?

[Mick6186]

Hi,
My +2130/5 under rebuild is a 1700 with L14 cams, 1.6 inlet & 1.375 exhaust valves, a bit of porting work & re-jetted Dellorrtos. When the engine was built it was fitted with a Lucas 48D4 distributor which has 10/20 degrees of mechanical advance. It was originally fitted with points and the previous owner said it pulled well. I was told by the engine builder that it should produce around 140bhp, with an increase in torque. I have now fitted electronic ignition from H & H ignition solutions, who were very helpful as it seems the distributor is a bit of a rarity on a twincam. The distributor comes with a side entry cap!!

[rgh0]

I would try as a starting point 20 crank degrees of mechanical advance with it all coming in by around 3500 to 4000 rpm. Static should be in the 10 to 12 crank degree range with total advance thus 30 to 32 crank degrees. But until you put it on the dyno with local fuels you dont really know what will be exactly right

cheers
Rohan