The Ford Barn

pooch · 07-05-2011, 07:09 PM

I have a few hills on the only highway in and out of my place.

The original motor does not have much power.

Tuning is good...timing and mixture.

Have not done a compression check.

Never have driven another model A to compare.

A prefect dizzy is on ebay ATM, is it worth fitting to try?

Or does it do the same job when on constant revs/speed uphill pulling as the manual lever would do?

I presume it has better cam lobes for different dwell as well.

I know it will save manual lever timing when chugging around the streets, but what about constant pulling?

I would rather save the money and keep it original if the prefect one won't give me any more pulling power.

http://cgi.ebay.com.au/ws/eBayISAPI....=STRK:MEWAX:IT

Chuck Sea/Tac · 07-05-2011, 08:29 PM

Save your money. Check your dist. body for a tight fit, the same on your rotor. You should have 25/30 thou. clearance on the rotor gap. Check the point gap on all 4 lobes, and they should be the same.There should be no side play when you try to wiggle the shaft. Repair as necessary. also the B dist. cam does give you more dwell, and I think thats the one most parts places carry. Chuck

2manycars · 07-05-2011, 08:32 PM

The advantage would be the auto advance. I cant see how that would make more power as such. If your original distributor is clean, tight, no slop in the shaft, no slop in the top plate, and has a new model B type cam in it, you should get all that you would from any other points distributor. in my opinion. Others may vary.

Bassman/NZ · 07-05-2011, 08:59 PM

The Prefect, or any Ford 10 model, dissy was a common swap on Model As in the 60s. Auto advance has gotta be good.

Brendan1959 · 07-05-2011, 09:50 PM

Sponsored Links (Register now to hide all advertisements)

hi
I am thinking of the same change, I now have 3 prefect Dizzys. There is a difference in the lobes and advance units in two of mine. No one could tell me on the Hamb what difference they would make and suggested having them tested on a machine. I plan to try one down the track and see what happens I found some nice yellow cloth coved wire for the leads. I paid $50 for the first dizzy and $5 for the other pair. I thinks there cant be many of these dizzys about and the new mech advance dizzys from Macs etc are a couple of hundred $, so get it if you can afford it.
see the pics on the Hamb
http://www.jalopyjournal.com/forum/s...an#post6586053

Regards
Brendan

07-05-2011, 07:09 PM	#1
pooch Senior Member Join Date: Sep 2010 Location: South Coast NSW Australia Posts: 2,596	Is a prefect dizzy worth trying? I have a few hills on the only highway in and out of my place. The original motor does not have much power. Tuning is good...timing and mixture. Have not done a compression check. Never have driven another model A to compare. A prefect dizzy is on ebay ATM, is it worth fitting to try? Or does it do the same job when on constant revs/speed uphill pulling as the manual lever would do? I presume it has better cam lobes for different dwell as well. I know it will save manual lever timing when chugging around the streets, but what about constant pulling? I would rather save the money and keep it original if the prefect one won't give me any more pulling power. http://cgi.ebay.com.au/ws/eBayISAPI....=STRK:MEWAX:IT

07-05-2011, 08:29 PM	#2
Chuck Sea/Tac Senior Member Join Date: May 2010 Location: Between Seattle & Tacoma Posts: 2,411	Re: Is a prefect dizzy worth trying? Save your money. Check your dist. body for a tight fit, the same on your rotor. You should have 25/30 thou. clearance on the rotor gap. Check the point gap on all 4 lobes, and they should be the same.There should be no side play when you try to wiggle the shaft. Repair as necessary. also the B dist. cam does give you more dwell, and I think thats the one most parts places carry. Chuck

07-05-2011, 08:32 PM	#3
2manycars Senior Member Join Date: May 2010 Location: Eastern CT Posts: 2,732	Re: Is a prefect dizzy worth trying? The advantage would be the auto advance. I cant see how that would make more power as such. If your original distributor is clean, tight, no slop in the shaft, no slop in the top plate, and has a new model B type cam in it, you should get all that you would from any other points distributor. in my opinion. Others may vary.

07-05-2011, 08:59 PM	#4
Bassman/NZ Senior Member Join Date: May 2010 Location: Napier, New Zealand Posts: 2,001	Re: Is a prefect dizzy worth trying? The Prefect, or any Ford 10 model, dissy was a common swap on Model As in the 60s. Auto advance has gotta be good.

07-05-2011, 09:50 PM	#5
Brendan1959 Member Join Date: Jul 2010 Location: Melbourne Australia Posts: 95	Re: Is a prefect dizzy worth trying? Sponsored Links (Register now to hide all advertisements) hi I am thinking of the same change, I now have 3 prefect Dizzys. There is a difference in the lobes and advance units in two of mine. No one could tell me on the Hamb what difference they would make and suggested having them tested on a machine. I plan to try one down the track and see what happens I found some nice yellow cloth coved wire for the leads. I paid $50 for the first dizzy and $5 for the other pair. I thinks there cant be many of these dizzys about and the new mech advance dizzys from Macs etc are a couple of hundred $, so get it if you can afford it. see the pics on the Hamb http://www.jalopyjournal.com/forum/s...an#post6586053 Regards Brendan