ausmini :: View topic - Pulsar dizzy into A+ motor

Hi mate

Being a mechanical novice

I was wondering what sort of advantage there is fitting a Nissan Dizzy to an A series? I have a 998cc in my 77 Cali, can I fit a Nissan dizzy to this and if I do will it give me better performance, economy etc.

regadrs

Devil Moker
Perth

Hey doc, what's your opinion on the A+ factory electrnic dizzy as found on the MG Metro? I have one and it works fine but could I be getting more from the Pulsar one? That is, will the curve be better for my worked motor and will it be better built with less "scatter"? I find that the car pings if I set the static advance to about 10 but is noticeably doughy if I set it at 5.

M

Have found that my vac advance sucks air.
Must have a puncture in the diaphram.
What is the best way to rectify?
Do I need to track down another distributor for the part?, or can you buy new
replacement part?

Author:	drmini in aust [ Wed Sep 14, 2005 11:02 pm ]
Post subject:	Pulsar dizzy into A+ motor
Fitting a Pulsar dizzy is just as easy as into an A series. Refer to post in Mods forum- viewtopic.php?t=1498&start=0&postdays=0&postorder=asc&highlight= Note: The A+ drive dog goes on the same but the roll pin is smaller. The Pulsar flange is cut off the same as on an A series. File the 3 little casting fins off it just above the flange. The standard A+ dizzy clamp will then fit in there. Note the dizzy driveshaft needs to be turned a bit to position the vacuum can. Here's pics-

Author:	Devil_Moker [ Sun Jan 22, 2006 1:59 am ]
Post subject:
Hi mate Being a mechanical novice I was wondering what sort of advantage there is fitting a Nissan Dizzy to an A series? I have a 998cc in my 77 Cali, can I fit a Nissan dizzy to this and if I do will it give me better performance, economy etc. regadrs Devil Moker Perth

Author:	drmini in aust [ Sun Jan 22, 2006 6:16 am ]
Post subject:
Devil_Moker wrote: Hi mate Being a mechanical novice I was wondering what sort of advantage there is fitting a Nissan Dizzy to an A series? I have a 998cc in my 77 Cali, can I fit a Nissan dizzy to this and if I do will it give me better performance, economy etc. regadrs Devil Moker Perth Compared to any common Lucas dizzy (25D 45D 29D etc) with points, a Nissan Pulsar one will: 1. Give less (or no) spark scatter between cylinders hence more power & smoother running 2. Allow larger spark gaps (better economy) 3. Better cold starting 4. Won't cark it in wet weather 5. Have a better advance curve than your worn Lucas one now has. For $40-$80 it's a bargain. Sure you could fit a Pertronix ignitor to your Lucas, (I did this before) but hey it's still worn inside, so many problems remain.

Author:	Devil_Moker [ Sun Jan 22, 2006 2:47 pm ]
Post subject:
Thanks Doc Appreciate the feedback. Will start hunting for one now. Devil Moker

Author:	Mokesta [ Sun Jan 22, 2006 8:35 pm ]
Post subject:
Hey doc, what's your opinion on the A+ factory electrnic dizzy as found on the MG Metro? I have one and it works fine but could I be getting more from the Pulsar one? That is, will the curve be better for my worked motor and will it be better built with less "scatter"? I find that the car pings if I set the static advance to about 10 but is noticeably doughy if I set it at 5. M

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Pulsar dizzy into A+ motor https://www.ausmini.com/forums/viewtopic.php?f=5&t=11178	Page 1 of 3

Author:	drmini in aust [ Sun Feb 12, 2006 9:21 pm ]
Post subject:
Mokesta wrote: Hey doc, what's your opinion on the A+ factory electrnic dizzy as found on the MG Metro? I have one and it works fine but could I be getting more from the Pulsar one? That is, will the curve be better for my worked motor and will it be better built with less "scatter"? I find that the car pings if I set the static advance to about 10 but is noticeably doughy if I set it at 5. M I have no knowledge of the A+ electronic dizzy, this one (out of `81 Moke) came with a Lucas 59D with sliding points. I don't know what my static advance is on this one, but I've found it runs fine with full advance of 30*, set with vac line disconnected. It works OK with 95 octane, no pinging. C/R is about 9.4:1, cam fitted is a Tighe 104 grind. Rockers are Toyota Corolla (modified) ratio 1.46:1.

Author:	andrea [ Mon Mar 20, 2006 4:58 pm ]
Post subject:
Have purchased a D4R85 for my 81 Californian Moke. Can you give me pointers on how to set the timing. With vacuum advance hose plugged what setting should I use for stroboscopic timing. The pointer next to the crank has increment numbers next to the timing marks ranging from 0,4,8,12,16 What should it be set to? Regards Andrea

Author:	drmini in aust [ Sun Mar 26, 2006 8:28 pm ]
Post subject:
A D4R85 has 12* centrifugal advance (at dizzy) = 24* at crank. Most 1275s run well at around 30* total advance, so I would set it at 6-8* BTDC at a slow idle, with vac line off. The most accurate way is to put a 30* BTDC mark on the crank pulley, rev it until advance stops, and line the marks up. Do this though with the vac line disconnected. Note- many of these s/h dizzys have a ruptured diaphragm in the vac can. Suck it and see. If you get an air stream, a new can is needed.

Author:	andrea [ Tue Apr 04, 2006 11:12 pm ]
Post subject:
Have found that my vac advance sucks air. Must have a puncture in the diaphram. What is the best way to rectify? Do I need to track down another distributor for the part?, or can you buy new replacement part?

Author:	drmini in aust [ Mon May 15, 2006 8:10 am ]
Post subject:
andrea wrote: Have found that my vac advance sucks air. Must have a puncture in the diaphram. What is the best way to rectify? Do I need to track down another distributor for the part?, or can you buy new replacement part? Easiest to trawl the wreckers yard with a bit of hose until you find one that doesn't leak. Or, take it back where you got it and complain. Should also be available new as a spare part from Holden or Nissan. Probably for $BIG.

Author:	drmini in aust [ Sun Oct 08, 2006 2:07 pm ]
Post subject:
I just did a D4R85 dizzy for our 1293A+ motor to replace the D4R83. No drilling required here, the `A+' roll pin is a just few thou smaller than the Nissan one, but it fits fine. Just knock out the Pulsar drive pin, remove `dog' (spacer), put the A+ dog on, knock in A+ drive pin. Including cutting off the mounting flange and filing the body fins so the A+ clamp fork fits, the whole job took 10 minutes.

Author:	Mowog [ Fri Oct 20, 2006 9:32 pm ]
Post subject:	Pulsar dizzy
I found trying to use one of these with an A+ drive dog, made for a lot more end play than the dizzy originally had. Assuming you would have found the same, has it caused any problems and how did you overcome them? Cheers Scotty.

Author:	drmini in aust [ Fri Oct 20, 2006 10:32 pm ]
Post subject:
I used 2 thrust washers. The Mini one and the Pulsar one.

Author:	Mowog [ Sun Oct 22, 2006 8:53 pm ]
Post subject:	End float
Tried that & ended up with it being so tight I was worried it might sieze & the thrust washers are so hard you can't thin them a little by rubbing on a sheet of wet n dry. Any idea how much end float you ended up running? Cheers, Scotty.

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Author:	drmini in aust [ Sun Oct 22, 2006 10:10 pm ]
Post subject:
I like around .005" end float. If too tight oil won't get up there, it will seize. Often when fitting a A series dog, it's too tight to fit any thrust washer. So I face a little off the top face of the dog to make room. Handy having a metal lathe...