1. 72SwingerJosh

    72SwingerJosh Well-Known Member

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    anyone know what the springs from FBO do for advance rate. I got the plate and springs along with a worthless book that is just propaganda for FBO and no real information. The springs came in a bag and no chart or description on what the combinations of springs do. The book is worthless and I recommend not ever buying it, the book is no help in recurving a distributor just a sales pitch. So any real information would be appreciated thanks.
     
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    • kiss

      kiss Well-Known Member

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    • Lelo Dart

      Lelo Dart * FABO Gold Member

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      This helps no one. I did not comment anymore after the thread so far south.
      I think the silver are the lightest. Maybe try the two silvers and go from there.
       
    • abodyjoe

      abodyjoe Well-Known Member

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      have a picture of the springs? may help someone identify them for ya..

      if they are real light like the mp kit then they probably put full timing in at about 1200 rpm when used together... if you use the light stock spring and one of those real light springs total will come in around 2200 rpm... this is if they are the real light ones like the mp ones..
       
    • roccodart440

      roccodart440 Well-Known Member

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      Exactly, very similar to the MP springs. Way too fast. Might as well lock the timing at that point.
       
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      • TrailBeast

        TrailBeast AKA Mopars4us on Youtube

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        You should call Don and ask him, as he is a nice guy and informative.
         
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        • 72SwingerJosh

          72SwingerJosh Well-Known Member

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          IMG_0741.jpg
           
        • 72SwingerJosh

          72SwingerJosh Well-Known Member

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          I asked don he said try the silver ones. Wasn't really as informative as I hoped. I figured there would be some kind of chart with the springs or somebody that had used them and knows what they use to get the curve they have. Also I ordered it from him on phone and he charged me more than the kit sells for on eBay. I didn't know the kit was sold on eBay or I would have ordered it there and saved $4 and if I knew the book didn't have useful information I wouldn't have gotten that either.
           
        • roccodart440

          roccodart440 Well-Known Member

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          He is another option. Find a guy locally with a suntach machine or the like. Even when I use MSD dizzy's which come with a chart I've found they can still use fine tuning so I have the local guy test them and set them up.
           
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          • abodyjoe

            abodyjoe Well-Known Member

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            those silver ones look like the light mp ones.. i'd use the stock light spring and one of thise silver springs and see where it puts it.. i think its gonna be about total @ 2200 rpm or close to that.
             
          • 72SwingerJosh

            72SwingerJosh Well-Known Member

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            Thanks. I wish there was a distributor machine near me. Would make life a lot easier.
             
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            • chrgdrt

              chrgdrt Well-Known Member

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              I have the instructions that come with the springs taht show the rate of adv. for each spring set.. I'll try and scan it in tonite.
               
            • 72SwingerJosh

              72SwingerJosh Well-Known Member

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              That would be great. Thanks.
               
            • chrgdrt

              chrgdrt Well-Known Member

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              try this
               

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            • 72SwingerJosh

              72SwingerJosh Well-Known Member

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              Thanks. That helped immensely and confirms to use one stock and one silver. That is what I will try first and see what it does. Thanks again.
               
            • revluvr

              revluvr Building competition Mopars for over 30 years

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              Hope this might help - Just a FYI, the FBO springs are Mr. Gasket 928G (for chevy points distributors). That's why the springs are such a bitch to put on the posts in Mopar distributors.
               
            • 72SwingerJosh

              72SwingerJosh Well-Known Member

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              Thanks
               
            • Lelo Dart

              Lelo Dart * FABO Gold Member

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              Looks like it doesn't it? Or do you know this for a fact?
               
            • Lelo Dart

              Lelo Dart * FABO Gold Member

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              My distributor came with one black and one silver. It's a fast curve with it all in by 2800.
               
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              • 72SwingerJosh

                72SwingerJosh Well-Known Member

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                What distributor do you have. One curved by fbo
                 
              • Lelo Dart

                Lelo Dart * FABO Gold Member

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                Yep. Not doing the whole manifold vacuum deal though.
                 
              • revluvr

                revluvr Building competition Mopars for over 30 years

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                Lelo Dart, the FBO springs are absolutely the Mr Gasket 928G springs. About the manifold vacuum debate? I have found manifold vacuum for distributor advance usually works better for big-cam motors that require extra throttle opening for idle. The extra advance at idle helps to smooth out a big cam, and lets you close the throttle plates to the correct position on the idle fuel transition slot in the carb, and gives you more pump squirt (much better response!). Ported vacuum can be better for stock/near stock motors with high idle vacuum.
                 
              • roccodart440

                roccodart440 Well-Known Member

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                All in by 2800 isn't too bad. Mine is all in by 3500 but I also have a 3500 stall so it works ok. I'd actually like to speed it up just a tad but my engine builder agues the point pretty heavily
                 
              • 70 DUSTER CRATE

                70 DUSTER CRATE Well-Known Member

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                Totally agree !
                Hey it's a learning process. You have to try things and see what works. I'm still learning. Here's My 2 Cents.

                IMHO, Before you get to the springs,
                if you had your dist. set up by him, take the initial timing spec. and the vacuum timing spec. that he gave you, and add them together. Set your initial there.
                See if your starter kicks back, just like the book says and it's what Crackedback always says to do.
                I don't know what motor you have for a total? But Don't drive your car until you Reset your mechanical, using your plate. Take your initial plus the mechanical you set it to, to get a total. A total for a 340 is near 35 degrees. Say 35 - [12 + 12] = 11 degrees mechanical.
                Hook up the dist. to ported vacuum, forget the manifold vacuum just plug the port on your carb., and use your allen wrench adjustment, [in the vac can] for when it is to come in, [ at what vacuum]. Test, it should be about 50 degrees of timing with the vac can, for your Grand Total. Still thinking for a 340.

                My experience with Don was good. When you are done doing it his way, you know a lot more about your ignition system. The white control box, that I bought from him is very good, although if you have a plain stock coil, you probably don't need his.
                I have the book and if you are a beginner, it does help you set your basic idle settings. The T-slot, which is what AJ pushes , is the Big key for tuning you carb. Set your idle screw and don't touch it again. Use the secondary screw.
                More initial at idle will give you a cooler running motor and the RPM'S.

                Just toss out the , using Manifold vacuum for your dist and using too low of an initial.
                And now you have Vacuum Advance at cruise. The way it was supposed to be.
                Now you're on your way, and now you can experiment with the springs.
                Like I said, Just my 2 cents. I hope I got it right ! LOL.
                And watch out for the salesman, he'll sell you the whole store.
                Hope this helps !
                 
                Last edited: Sep 10, 2017
              • cuda66273

                cuda66273 Well-Known Member

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                If your not happy with the information in the book just return it for a credit.

                Standard in the industry is Gold, Silver, Black the gold being the lightest.

                If you have a problem with anything you have purchased from us our phone number is on all the paperwork and a business card is in every package, just pickup the phone and call us, I'm here Monday - Thursday 8AM to 3PM Pacific time and I answer the phone even if I'm not in the office at just about any reasonable time. You can also text to my number 24 hours a day and I'll get back to you.

                A Mopar distributor spring rate is controlled by the tension of the spring and the pin adjustment. If it's a Mopar distributor then you rotate the pin and it will move .060 in each direction to fine tune the tension on the spring, if it's a Chinese copy then it may have a tab that can be bent to change the tension. A chart would be worthless unless you know where the pin is set or how far the tab has been bent. These distributors have been made by dozens of suppliers from China, Taiwan and others over the years and they all have different weight specs giving you different advance rates. Looking down from the top the flange on the spring pin should be a "D" shape which designates an eccentric elliptical design to move the pin in and out. Some of the import distributors use the "D" shaped flange to fool you into thinking it's a real Mopar distributor but you'll discover that the pin does not move.... but they're cheaper.....

                Posting these types of technical questions on web boards will usually yield a dozen answers probably mostly all wrong.

                Just pick up your phone.
                 
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