Power spark dizzy timing

Big lumps of metals and spanners. Including servicing and fluids.

Moderators: User administrators, Moderators

Post Reply
Asw
Registered user
Posts: 92
Joined: 26 Aug 2013, 15:11
80-90 Mem No: 12781
Location: Welton, East Yorks

Power spark dizzy timing

Post by Asw »

Hi

I Am now running a power spark dizzy on my CU engine and have just watched sarran1955s video on the subject.
Can I just check. Do you set the timing to 8 BTDC without vacuum? This sounds right as it fits with the timing for the single vac factory unit?
Ultimately, are we not all air cooled?
1981 Devon Moonraker, CU engine

User avatar
bigherb
Registered user
Posts: 2579
Joined: 27 Mar 2008, 13:50
80-90 Mem No: 5789
Location: West Kent

Re: Power spark dizzy timing

Post by bigherb »

Yes, but then importantly make sure the timing advances to 28-32 deg BTDC @ over 3500 rpm vac still disconnected, and then make sure the timing then returns to 8 deg at idle.
1982 Camper 1970 1500 Beetle Various Skoda's, Ariel Arrow

Asw
Registered user
Posts: 92
Joined: 26 Aug 2013, 15:11
80-90 Mem No: 12781
Location: Welton, East Yorks

Re: Power spark dizzy timing

Post by Asw »

Many thanks.
I’ll get my strobe out tomorrow.
Just out of interest Do you know how much extra the vacuum Will add at 50= 60 mph? I have read that some engines cruse at upto 50 BTDC??
Ultimately, are we not all air cooled?
1981 Devon Moonraker, CU engine

User avatar
bigherb
Registered user
Posts: 2579
Joined: 27 Mar 2008, 13:50
80-90 Mem No: 5789
Location: West Kent

Re: Power spark dizzy timing

Post by bigherb »

Maximum vac advance is 12 deg but only works at part throttle under when the engine is under load.
1982 Camper 1970 1500 Beetle Various Skoda's, Ariel Arrow

Post Reply