Help wanted: Grey motor Petronix owner with a dwell meter

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Help wanted: Grey motor Petronix owner with a dwell meter

by Harv » Tue Nov 11, 2014 12:21 pm

Ladies and gents,

For my magneto thread (http://www.fbekholden.com/forum/viewtop ... 25&t=20727), I want to do a brief write-up about the Pertronix Ignitor I (often just called a Petronix). I will do a comparison between maggies, dual-point dizzies and Petronix equiped greys.

I have a pretty fair idea of how the Pertonix Ignitor I works, and know that dwell is waaaay different to a standard grey (Pertonix get extra zap in other ways than increasing dwell). Measurements made by some enthusiasts (but not on the grey motor Pertronix 1864a) show dwell is around 27-28º - substantively lower than the factory grey motor 35º to 41º.

I'd like to publish the specific number for the grey - does anyone on the forum have a Pertonix installed who can run a dwell meter over it for me please?

Cheers,
Harv (deputy apprentice sparkplug tester)
 
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Re: Help wanted: Grey motor Petronix owner with a dwell mete

by Johnno1957 » Wed Nov 12, 2014 9:31 pm

Hi I have one on my grey motor, but never put the dwell meter on it as soon as I did the timing it ran fine, I will put my dwell meter on it tomorrow and let u know.
Johnno
 
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Re: Help wanted: Grey motor Petronix owner with a dwell mete

by Harv » Thu Nov 13, 2014 7:53 am

Thanks Johnno - appreciated.

If you get a chance, please also measure the gap between the circular magnet and the pickup - I'll PM you some info on what I've learnt so far (don't want to spoil the suprise for the others :lol: ).

Cheers, and thanks,
Harv
 
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Re: Help wanted: Grey motor Petronix owner with a dwell mete

by Harv » Sat Nov 15, 2014 6:10 pm

Mmmmm..... magneto.....

Johnno, did you get a chance to check the dwell and air gap on the Pertonix (pretty please)?

Cheers,
Harv
 
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Re: Help wanted: Grey motor Petronix owner with a dwell mete

by hcap » Sat Nov 15, 2014 10:24 pm

What's a bearbox?
 
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Re: Help wanted: Grey motor Petronix owner with a dwell mete

by EH Axiomatic » Sun Nov 16, 2014 1:33 am

hcap wrote:What's a bearbox?

Gee don't you know anything hcap ? ;) :lol: (see photo)
Its where you keep your secret Pertronix info in ... like grey motor dwell specs and secret gap measurements.
You have to keep it latched from old grizzly's like harv. cause if he finds it , that might mean he will beat you next time you race!
Doh someone's left it unlatched .......he must have got his paws on the info :o
Dogmatic Axiomatic
 
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Re: Help wanted: Grey motor Petronix owner with a dwell mete

by Harv » Sun Nov 16, 2014 3:15 pm

hcap wrote:What's a bearbox?

A bearbox is what's left once you take the Petronix out of the factory packaging. Put the Petronix back in and its a fullbox :lol: .

EH Axiomatic wrote: .......he must have got his paws on the info :o

I got one datapoint from one of the humpy guys - 33.6º dwell at an air gap of 0.040". This is less dwell than the factory grey.

Still very keen to get Johnno's reading to compare it to the above.

Cheers,
Harv
 
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Re: Help wanted: Grey motor Petronix owner with a dwell mete

by EJSedan63 » Sun Nov 16, 2014 9:23 pm

blur1 wrote:grey stuff for sale in this lot.
http://www.justauto.com.au/justparts/pa ... xt=Results


Wont separate and wants top $ I imagine he will have that add up for a long time.
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Re: Help wanted: Grey motor Petronix owner with a dwell mete

by Harv » Mon Nov 17, 2014 7:56 am

Type 65 back on the market again. Spoke briefly to him last time it was for sale. Would love the dimensions on that mounting bracket.

Cheers,
Harv
 
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Re: Help wanted: Grey motor Petronix owner with a dwell mete

by Harv » Mon Jan 12, 2015 8:02 am

Nice maggie. I'd need a second mortgage to afford it though :shock: .

Cheers,
Harv
 
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