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Is this a LOM dizzy or a dual action dizzy?

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rmcphearson
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Is this a LOM dizzy or a dual action dizzy?

Post #1 by rmcphearson » Tue Feb 26, 2019 3:58 pm

Is this a Load-O-Matic dizzy requiring a SCV or is it a dual action that has mechanical and vacuum advance?

Thanks,
Roland

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StarDiero75
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Re: Is this a LOM dizzy or a dual action dizzy?

Post #2 by StarDiero75 » Tue Feb 26, 2019 4:55 pm

If it needs a SCV, I'm pretty sure thats a LOM. Dual advances don't need anything special
--1965 Ranchero w/1966 200 and 3.03 column shift, 8" rear 2.8 (Yes I know the gearing sucks), weber 32/36, CRT Performance HEI.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected. But it lives
--Creator of the only Weber 32/36 conversion video.

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B RON CO
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Re: Is this a LOM dizzy or a dual action dizzy?

Post #3 by B RON CO » Tue Feb 26, 2019 5:09 pm

Hi, I can't see your distributor.
68 and later had the modern vacuum and mechanical advance.
Good luck
B RON CO. Still workin' on it!

1933 Ford Pickup - 59A Flathead V8
1966 Ford Bronco - U14 - 170/200 Straight 6
1966 Ford Mustang - 289 V8

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Re: Is this a LOM dizzy or a dual action dizzy?

Post #4 by rmcphearson » Tue Feb 26, 2019 5:23 pm

I forgot to attach the photos. I will do it tomorrow.

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Re: Is this a LOM dizzy or a dual action dizzy?

Post #5 by Econoline » Tue Feb 26, 2019 9:14 pm

One of the tells is the vacuum diaphragm. I don't know if they are all like this but the ones that are hard piped or have tubing/pipe connection instead of built in smooth nipples are scv types. All the 68/69 and later dual advance types used hose. The canisters look totally different to.
It ain't gonna fix itself

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Re: Is this a LOM dizzy or a dual action dizzy?

Post #6 by rmcphearson » Wed Feb 27, 2019 7:50 am

Here it is.
You do not have the required permissions to view the files attached to this post.

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Re: Is this a LOM dizzy or a dual action dizzy?

Post #7 by bubba22349 » Wed Feb 27, 2019 9:26 am

That's a duel advance distributor! :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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Re: Is this a LOM dizzy or a dual action dizzy?

Post #8 by rmcphearson » Wed Feb 27, 2019 3:00 pm

Thanks Bubba!

That makes sense because this is a '69 block and '70 head (or vise versa-I don't have my notes in front of me). Now, I have a Autolite 1100 on it and the vacuum line to the dizzy is coming from the SCV! Don't look at me, that's how I bought it!

What source should I use? There is a large port on the side of the carb that feeds the PCV and there is the manifold plug. Should I be using one of those?

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Re: Is this a LOM dizzy or a dual action dizzy?

Post #9 by B RON CO » Wed Feb 27, 2019 3:09 pm

Hi, Someone put the wrong carb on your engine. Not too surprising. I would use direct manifold vacuum for now. Most guys use the timed, or ported vacuum for the distributor advance. Ported vacuum does not give advance at idle, only high vacuum conditions like steady cruise. Direct manifold vacuum will advance the timing at idle, which could raise the idle. So you may have to lower the idle after your switch. Good luck
B RON CO. Still workin' on it!

1933 Ford Pickup - 59A Flathead V8
1966 Ford Bronco - U14 - 170/200 Straight 6
1966 Ford Mustang - 289 V8

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Is this a LOM dizzy or a dual action dizzy?

Post #10 by chad » Wed Feb 27, 2019 3:21 pm

rmcphearson wrote:Now, I have a Autolite 1100 on it and the vacuum line to the dizzy is coming from the SCV! Don't look at me, that's how I bought it!
What source should I use? There is a large port on the side of the carb that feeds the PCV and there is the manifold plug. Should I be using one of those?

These darn che**y guys!
Time for the "Handbook" (Oh, I think U said U have one? May B the above 'tech archive' @ the big blue box - crossed screwdriver/wrench).
"Big thing is only make one change at a time. Change 2 or more things at a time it becomes difficult to figure which change helped or hurt" turbo2256b » 1/16/2017
Chad - '70 LUEB on '77 frame (i.e. PS, D44, trapezoidal BB 9", 4.11), 250, NV 3550 & DSII to B transplanted, "T" D20/PTO, 2" SL, 1" BL, 4 discs, 33"X15", tool boxes, etc. Seeking: Hydraulic gear motor for Koenig pto. chrlsful@aol.com (413) 259-1749

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Re: Is this a LOM dizzy or a dual action dizzy?

Post #11 by wsa111 » Wed Feb 27, 2019 4:31 pm

Your SCV Carb. can be modified for ported vacuum.
There is a tech article on how to do it on the forum tech section.
I can do them for $50.00 plus parts if manifold vacuum is not producing desired results.
The best thing you could do if you want to keep the present distributor is get rid of the points & install a Pertronix 1.
A distributor recurve would also reap benefits. Bill
67 mustang,C-4, with mod. 80 hd, custom 500 cfm carb with annular boosters, hooker headers, dual exh.-X pipe, flowmaster mufflers, DSII dist. MSD-6al & TFI Coil. Engine 205" .030" over with offset ground crank & 1.65 roller rockers. 9.5 comp., Isky 262 cam.
2003 Ford Lightning daily driver. Recurving Distributors. billythedistributorman@live.com
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Re: Is this a LOM dizzy or a dual action dizzy?

Post #12 by rmcphearson » Wed Feb 27, 2019 8:00 pm

Thanks all. I don't want to put anymore time or money into this Autolite 1100. I have a Holley 1940 that I plan to get rebuilt by a pro.

1) I don't see a SCV on the Holley 1940 so I assume it has a ported vacuum source?

2) According to my bible "Clifford lists a Mallory Dual Point and a Unilite Electronic distributor, with or without vacuum advance." So, if I get one of these without vacuum advance, I guess I could keep using the Autolite 1100 for a while? Are there any cons to this type of distributor?

Thanks,
Roland

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Re: Is this a LOM dizzy or a dual action dizzy?

Post #13 by Econoline » Wed Feb 27, 2019 9:56 pm

1) Yes

2) Don't bother, even if you can find one. Get the carb and get that dialed in first. Then if you want to upgrade the ignition, do what Bill says and swap the points out for a DSI pickup. It'll be cheap to do and look like a points setup if that's important. Or swap the distributor out for late a 70's DSII distributor. Either way, use it w/whatever module and coil you want to use. The only advantage of the later distributor is the size of the cap. Who knows whether you need it or not in particular.

The biggest driver with ignition swaps on these engines is the LoM stuff. You've got that part covered. The points will be fine until whenever. You need the right carb. And like b ron co said, I'd try using manifold vacuum in the meantime but you'll have to compensate by turning the idle down and fine tuning the mixture screw when you hook the vacuum back up after checking/setting the timing. Close off the scv timing port. Later pull the scv and plug it with an 1/8" pipe plug just for fun. Do you have a dwell gauge?
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Re: Is this a LOM dizzy or a dual action dizzy?

Post #14 by CZLN6 » Thu Feb 28, 2019 11:37 am

Howdy Roland:

FYI- Holley 1940s came both with SCVs and without. They were a generic Service Replacement part sold through Ford Service Dept. They were refitted to fit any Ford vehicle that used to have an Autolite carb through to about 1970. So check it out carefully.

Adios, David
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http://www.falcon6handbook.com/

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Re: Is this a LOM dizzy or a dual action dizzy?

Post #15 by rmcphearson » Thu Feb 28, 2019 2:43 pm

Ok, great, thanks guys. I will take a photo of my Holley 1940 and someone can confirm for me it's not supposed to have a SCV.

If I swap the points out for a DSI pickup will I still need a dwell meter? I don't have one. I don't even have a timing light.

-Roland

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Re: Is this a LOM dizzy or a dual action dizzy?

Post #16 by Econoline » Thu Feb 28, 2019 9:09 pm

You need a timing light. Either the carb will have an scv or a port for it or it won't. If you know what a holley power valve looks like, they look the same. If there is one or a spot on the carb with an 1/8" pipe plug in it, it's scv type carb.
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Re: Is this a LOM dizzy or a dual action dizzy?

Post #17 by rmcphearson » Tue Mar 05, 2019 8:53 pm

1) Should I get the Pertronix ignitor part # 1261 or ignitor II part # 91261?
2) What else should I get with it?

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Re: Is this a LOM dizzy or a dual action dizzy?

Post #18 by rmcphearson » Sun Mar 17, 2019 1:11 pm

Well, well, speak of the devil. Here I've been trying to figure out exactly which ignitor/coil to order. I even sent Pertronix a message asking about what coil to get and if it requires a resistor yada yada yada. (I didn't get a reply). And my bleeping points take a crap while driving home yesterday. The engine won't fire at all now. I'm assuming it's the points. I have 10v at the + terminal of the coil but no spark. I popped the dist cap and the points look they've been drug down the road then chewed on by Oprah.

I ordered a 1261 ignitor and flame thrower coil for $113 total from ebay and I will have to wait a week. Dang it.

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Is this a LOM dizzy or a dual action dizzy?

Post #19 by chad » Sun Mar 17, 2019 1:45 pm

thanks for the update.

For additional ideas I personnally would need an updated list of components.
Starting to loose track of what yer actually running.

I think the 1100 is way better than the 1940. Pare it w/the DSII for performance (MPGs & pep).
"Big thing is only make one change at a time. Change 2 or more things at a time it becomes difficult to figure which change helped or hurt" turbo2256b » 1/16/2017
Chad - '70 LUEB on '77 frame (i.e. PS, D44, trapezoidal BB 9", 4.11), 250, NV 3550 & DSII to B transplanted, "T" D20/PTO, 2" SL, 1" BL, 4 discs, 33"X15", tool boxes, etc. Seeking: Hydraulic gear motor for Koenig pto. chrlsful@aol.com (413) 259-1749

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Re: Is this a LOM dizzy or a dual action dizzy?

Post #20 by bubba22349 » Sun Mar 17, 2019 1:58 pm

That should be a great improvement when you get the 1261 Pertronix and Flame Thrower coil. :thumbup: :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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