Ok, I found this over on another forum. It is basically a round disk that you put in the distributor, on top of the weights. It has numerous slots in it that correspond to different amounts of mechanical advance.

Has anyone here used these? I measured the various slots and the numbers don't quite match up with the numbers for distributor slots from various posts here.
Plate measurements:
10* > .330"
12* > .350"
14* > .368"
16* > .392"
18* > .410"

The plate will be easy to modify, much easier than welding and grinding the distributor advance slots.
Anyway, just wondering if anyone here has ever given these things a try.

_________________
-MattMan
LEANED & MEAN

Yeah, someone (Derrick?) just showed a bunch of us this at M-D. Look like a nice setup. Have not used one yet, but maybe others.

BTW, I am sorry we did not get to meet at M-D. I guess we were both running around and didn't cross paths on Sunday. Look fwd to meeting you in the fall.

Best wishes,

Lou

_________________
Home of Slant6-powered fun machines since 1988

I missed meeting a lot of the guys as well. I hadn't seen my brother in a while and we spent so much time (goofing off) that I didn't get to really meet anyone. Between now and October, I plan to bring the car to Mason-Dixon at least once. Not many full quarter mile tracks near me, guess I'll have to get used to the eighth mile.

_________________
-MattMan
LEANED & MEAN

Yes, Derek Gordon showed us that. I went to their web site but didn't see how to order except by calling. I plan to order two tomorrow. Ryan needs one for his truck and I want one also.

Rick

_________________
2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

...how does the original governer fit with that ring in there, do you have to modify it or use an alternative piece...I'm not seeing how they interact now that you have the ring in there.

brian

_________________
https://tinyurl.com/yynpj4v2

It's from FBO at $22 a whack... it sits in between the governor and the weights... I'm going to order one and put it on the machine to see how far off it is... I see they have a kit for more $$$ where you get a set of Mr/ Gasket springs for a 30% markup on the price if you just ordered them over the counter....

2 worries I have right off the bat:

1) If the slots aren't snug the timing will wobble during advance and retard as RPM changes.

2) If the stainless steel these are made of is harder than the materials in the pegs and contact part it could wear on the distributor parts, if the limiter is less than 22 gauge then a lightly springed advance can hammer the ends of the slot elongating them ....Also chrysler had a fair variation in how much room is in between the governor and the weights... this will shim the governor upward and some people may have problems getting the governor to seat and getting the C clip hair pin to seat as well...


2 cents.

I just posed it that way for the pictures.
It seems to fit without any interference.

_________________
-MattMan
LEANED & MEAN

clearly it fits well in there...

brian

_________________
https://tinyurl.com/yynpj4v2

That would be great if someone could run this thing up on a distributor machine. I wish I had access to one.

_________________
-MattMan
LEANED & MEAN

I spoke to a very nice gentleman on the phone. Don was his name. I ordered 4 and they were $15/ each. I'll report back on how they work.

Rick

_________________
2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

Got my 2 yesterday, have a couple of unfinished cores I had stashed away, so will get one mapped, and install the plate and see what happens next...

Got mine too.

_________________
2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

Will have to play tomorrow, the 6 volt battery for the SDT was flat (after 60 months on a 36 month warranty....LOL)...so I'll have to go get another one and play tomorrow....

This thread should probably be moved to electrical since it's more ignition related...

I pulled a known points distributor from my mapped units since it was easier to plug, play and adjust the plate than having to pull the reluctor and set up the backboard for EI.

Here is what I know after a few hours of playing with it (and my 12:1 motor sitting behind me wisecrackin"When are you going to degree the cam and put me back together???")


The plate is made of thin gauge stainless (roughly 26 gauge)with stamped openings. Quality control on manufacture looked good.

Caliper measurements for the slots indicated these measurements and were consistent with both the plates I received:


10=.331
12=.350
14=.368
16=.393
18=.411
(pretty close to 'verts numbers)

The slots ends are squared off a bit more than the standard governor slot.

I pulled a checking fixture from my stock (i.e. an OEM 9R governor, and 15L governor)...

9R=.387
15L=.470

The test distributor was an early 60's points core that had been dialed in to provide 18 crank degrees of advance at 2500 engine rpm, and at 5000 rpm it was max at 22 degrees.

I pulled the plate and governor and installed the limiting plate, and noticed 2 things right off the bat...

1) The plate is a good fit.
2) When fully seated it rides at the very top of the nylon bushing that the governor sits on...

Typically the governor has a little play if lifted up against it's circular "hairpin" and I would have a slight worry if the vehicle was on rough terrain and the distributor took a good bounce and dislodged the plate.
The other slight concern is the material of the bushing the governor stis on and centers the plate...stainless will act like a kitchen knife against the softer plastic, some big block distributors came with bronze bushings, but I'm not sure what years they were available, but it would be nice if we could replace the bushing with something a bit more durable, and a few thousands taller.

I set the initial test up on the 14 slot since that would be very evident once I limited out at 2500-3000 rpm.... Running it up to "cruise" rpm was smooth and easy (used a little synthetic grease between the weights and limiter to make sure it slid without any hitches), and the plate did limit things out to 14 degrees... I then ran it hard up to 5000 rpm, and it did not stay at 14 it was a solid 16 at that point...

Curious to see if that also was the case on another setting, I decided to pull the guts again, and install the plate at 18. Running the same test, advance was smooth all the way through the range, at 2500-3000 rpm it held at 18 just like I had programmed it to, after that the advance at 5000 rpm limited out to 20...

I stopped there since it seemed like the formula would still play itself out the same, plate number + 2 degrees = actual limited crank advance.

So pick your limit carefully according to your needs... (10BTDC static + 20 limit = the standard MP race distributor... 12 BTDC + 18 limit = super six distributor... smaller limits would show promise for Turbo applications like the 10 and 12 slots)

It would be nice to see someone put this into a daily driver and look at the long term effects of the plate after a lot of mileage (15,000 or so and beyond...). It is also worth the money if you are going to make some timing changes and don't want to spend some beer money and time welding up the slots and reshaping them... It does make an easy to install lockout plate and you won't have to destroy a good distributor to lock the advance out... (that being said, in some places it still might be cheaper just to get a junkyard ESC distributor, clean it up and plug it into the drag car....)

Now I'm going to degree in a cam and button up the bottom end so I can get back to working on big block clutches for heavy slanted cars...

Cheers-

-D.Idiot





P.S. I should also put a plug in here to thank FBO for being able to provide these at a reasonable price, for the mopar enthusiast and shipping them in a timely fashion (they are just a bit south of Fopar and Ceej down the valley).

Thanks DI. That is all good information. Not exactly sure when Ryan or Andrew will get theirs in, but I may go ahead and stick mine in the race car. I want to dial in some more initial timing and this may be the ticket. I'll let you know.

Rick

_________________
2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6