single vac or dual vac DSII

[matt1967]

I'm going to get a new Duraspark II distributor, will be wired into a MSD 6A box with the proper MSD connector, and the MSD box will be wired into a Megasquirt II box for ignition control. do I want Dual or single vac distributor?

 

[Anonymous]

You should do a search, but I think the general consensus is the single..

 

[66 Fastback]

Dual vacuum advance does nothing to enhance performance. The retarding of the spark was used to reduce emissions. Better fuel economy and performance were possible with the singe vacuum cannister type distributors.
Doug

 

[matt1967]

that's what I figured. $10 cheaper too

 

[matt1967]

just ordered a single vac. 66.42 from the local carquest. also got cap and rotor

 

[addo]

Matt - expect it to be wrongly curved. That's a specialty of the rebuilders...

 

[matt1967]

Matt - expect it to be wrongly curved. That's a specialty of the rebuilders...

I'm locking out the timing for the MSII fuel injection anyway.

 

[CobraSix]

Single.

Dual was an emissions gimmick only and are a royal PITA to tune.

Slade