Distributor Cam
 

Why is there a difference in Distributor cams? One being a sharp lobe and the other a round lobe. Snyder's shows just a cam with no mention of sharp or round. Ebay has these listed:

http://cgi.ebay.com/ebaymotors/1928-...ts_Accessories


http://cgi.ebay.com/ebaymotors/1928-...ts_Accessories

Re: Distributor Cam
 

Correct me if I'm wrong but aren't some of the cams (dist) being offered have a "B" profile to them, is that what would be considered a "sharp" lobe and the "A" a round lobe or viceversa?
Paul in CT

Re: Distributor Cam
 

yes:confused:

Re: Distributor Cam
 

The "B" cam is the only one I know of being made new. It has the appearance of 8 vertical lines, where the "A" cam has 4 lines.

Re: Distributor Cam
 

We have the new cam in house for evaluation but have not completed out testing for a Model A Times article. But the new cams are much higher in quality than the old cams.

Re: Distributor Cam
 

I got my new B distributor cam at A&L in CT 860 693 2620 and as with all the stuff they make or have made is of the best quality

Re: Distributor Cam
 

Can you use a B distributor cam on a Model A? What would the difference be in the running if you could?

Re: Distributor Cam
 

Afordman31 - Yes, you can. As I understand it (please correct me if I am wrong), the "B" cam will allow dwell time to be such that the coil will be saturated as much as possible (especially at high speed), and produce the maximum spark it is capable of.

I hope this helps.

Re: Distributor Cam
 

Yes the B distributor cam works very good in a model A distributor. The so called ocean wave profile gives the coil more build up time between firings. The B dist. cam is said to double the spark. I use them in our cars. Don't expect it to give the boost of a high compression head but I am of the opinion that every little bit helps and it is not a visable modification.

Re: Distributor Cam
 

Hey Tom, count them again without using your fingers! Maybe you just got your ABC's mixed up.
Rainmaker Ron

Re: Distributor Cam
 

Heck, if you don't mark where you started at on the cam, the lines just keep on going forever as you rotate it! http://model-a-ford.com/LOL.gif

Re: Distributor Cam
 

Thanks Ron, yes I mixed the two up. The B cam has 4 lines, while the A cam has 8 lines. Anyway, as far as I know the B cam is the only one being made now.

Re: Distributor Cam
 

http://i118.photobucket.com/albums/o...rCamsAandB.jpg

Here's a picture comparing the two cams.

Re: Distributor Cam
 

There is a brand new Distributor cam Mfg it has about 10 more degrees of dwell for a better spark, it is made from air hardened tool steel and heat treated like the original cams.
They sell for $12.75

Re: Distributor Cam
 

Where do you get them?

Re: Distributor Cam
 

Call 1-920-467-2895 ask SueAnn for a Model A-B distributor cam part # SMC0033

Re: Distributor Cam
 

Thanks, Red Rocket!!!

Re: Distributor Cam
 

Can you time the ignition the same way as with the original designed cam ?

With the original cam, you set it just as it's going to open. I wonder if the steeper cam profile makes the timing real hard to set ?

Marc

Re: Distributor Cam
 

That's Bill Stipe at Specialty Motor Cams, so it's going to be an excellent part.

Joe

Re: Distributor Cam
 

Marc
Yes you can time it the same exact way.