Big Block Gear Drive On A Slant?

Slant 6 Engines

  1. CNC-Dude

    CNC-Dude Active Member

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    Yeah, it' a pretty narrow niche market at best. I started a thread over there back in 2010 about roller cams and there have been numerous ones since then. I doubt in total there hasn't been many made and fewer that have actually found there way into running engines in that time.
     
  2. yellow rose

    yellow rose Doctor of Thinkology.

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    RRR check your PM's. I sent you one.
     
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    • j par

      j par Well-hung Member

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      You have top-secret Slant six Gear Drive information?
       
    • RustyRatRod

      RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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      He has some top secret none of your business information.
       
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      • prorac1

        prorac1 Well-Known Member

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        37F1399F-98B8-4FBA-9142-12ED3F9E2D9E.jpeg
         
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        • j par

          j par Well-hung Member

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          That's a bummer I was really hoping to get some top-secret Slant six timing gear information...
           
        • Killer6

          Killer6 Well-Known Member

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          Not without a .org decoder ring......................
           
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          • slantracer

            slantracer Active Member

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            If you want to hear a slant 6 with a Pete Jackson big block MoPar gear drive go to youtube and put in "Green Grenade Mo-Kan Dragway". I think the sound might be louder than an iron block with a gear drive as this sound is with an aluminum engine block.
             
          • j par

            j par Well-hung Member

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            I think he's flipped his top...
             
          • yellow rose

            yellow rose Doctor of Thinkology.

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            Rusty's top is screwed on just fine.
             
          • j par

            j par Well-hung Member

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            One must consider both sources on that one...
             
          • yellow rose

            yellow rose Doctor of Thinkology.

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            We are certainly considering you as a source. A source of derailing threads among other things.
             
          • j par

            j par Well-hung Member

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            SNOWMOBILE!
             
          • yellow rose

            yellow rose Doctor of Thinkology.

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            AND THERE YOU HAVE IT. THE ULTIMATE THREAD DERAILER/KILLER.
             
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            • j par

              j par Well-hung Member

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              How about right back on subject what do you have as far as a slant 6 timing gear?
               
            • yellow rose

              yellow rose Doctor of Thinkology.

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              I can't count all the /6's I've done but it's sooooo many I was bored by them. I worked where we had accounts for /6's that went into forklifts and rail car moving whatever they were. Just on /6's and Continentials I've probably set 1000 sleeves. Maybe more.

              I can honestly say I've never seen a GD for a /6. Doesn't mean you can't make one. Even if you did make it, and could produce it so the average guy could buy it (I'm talking about a fixed idler 3 gear drive) you'd probably never sell enough to get the intial investment back.

              I hear lots of people bad mouth gear drives, but when questioned, they've either never run them, or used a junk floating idler system like the Pete Jackson system. Those aren't as good as a chain.
               
            • RustyRatRod

              RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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              And why is the floating idler system no good? That's what I intend to use.
               
            • CNC-Dude

              CNC-Dude Active Member

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              I saw a generic gear drive set for a 440 on eBay that includes all the bolts, bronze thrust bearing, idlers and everything brand new for $44.00. Add a $2 piece of material to make the cam gear spacer to fit a Slant and you can't get any cheaper than that.
               
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              • CNC-Dude

                CNC-Dude Active Member

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                Nothing's wrong with them, most all other engines use the floating idlers with gear drives. Some people don't like them because they do walk forward and backward if they aren't pinched in place by the timing cover. But they don't cause problems.
                 
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                • RustyRatRod

                  RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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                  Well, it would be simple enough make the dual idler a fixed idler since the front of the slant six block is flat. Just one more consideration I suppose. I see no problem with the dual idler, either. I've set a few up before and the timing is much more stable than a chain. When set up right, there's zero slack.
                   
                • yellow rose

                  yellow rose Doctor of Thinkology.

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                  The issue is there are two different gear sizes. When the engine is in acceleration, it has one gear (I forget which gear it is...the smaller or the bigger) that drives the cam. When you lift off the throttle (or worse yet, if it's a stick and you're at WOT and push the clutch) the other gear slides over and takes over driving the cam.

                  I've seen as much as 10 degrees of cam movement with this system. The usual is about 7-8 degrees. It varies from drive to drive, deck height and who knows what else. But 7-8 degrees is about the average. That's a lot.

                  I learned this the hard way. I did an engine that had enough P/V (because I always check) and it went out and bent some valves. After I varied I wasn't on dope when I did the first measurement, I found out it would move the cam timing a mile. Hence, the bent valves.

                  That's the quick of it. I've heard some unverified stuff that I don't like to post so I usually save that stuff for private conversations because I don't have the ability to test what I was told.
                   
                • yellow rose

                  yellow rose Doctor of Thinkology.

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                  If they pinch in the timing cove they don't work. How would one pinch in a small block Chrysler or a Pontiac or Ford with a thick, cast cover?
                   
                • RustyRatRod

                  RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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                  Hush up. Don't be tellin my secrets. lol

                  It's gonna take more than two bucks to make the spacer I have to use. I am using a three bolt gear drive. I am going to get the shop to convert the slant cam to the three bolt design and make a spacer to engage the camshaft and the camshaft gear properly. The metal itself might be two dollars. LOL
                   
                • yellow rose

                  yellow rose Doctor of Thinkology.

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                  Read my post and do a fixed idler. You'll be much happier in the end.
                   
                • yellow rose

                  yellow rose Doctor of Thinkology.

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                  One more thing...it won't be long before jpar comes along and screws up another thread.

                  Hi jpar.
                   
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