Make more sense now, I think the adjustable collar would set flush with the intake.
Restarting my 348 project!!
- Thread starter Tim
- Start date
now that I got it figured out it’s a very easy solution to the W motor distributors and opens the door to all the SBC stuff available. Show Cars did an excellent job making this part and it works. Getting it figured out was a bit clunky. Once I see Steve’s and where to collar sits it’s just getting the shim to take up the gap and all good. Seeing how his hold down is made too. I won’t even have to shim for play because I have .010 with it as is. Just have to make sure the shims/gaskets aren’t more than the gap to fill. I certainly learned a lot with this. I’ll try and gather the info,condense it and put it all in it’s own thread.
Wont the collar lock the distributor, then the gap between it make's no difference. And your hold will only need to hold the collar.
James, that would work however looking at the sleeve and the shaft I’m pretty sure the collar has to but under the distributor flange. The shaft boss on the distributor that the sleeve slides on to isn’t that wide and if The collar was on the intake over half the collar clamping in behind the sleeve there’s nothing there on the shaft but a space. My concern would be it coming loose over time. Both the sleeve and collar are light aluminum.
having said that the sleeve is less diameter than the intake opening and the collar not sitting on the intake would need that gap sealed.
once Steve gets a pic of his I’ll know if it sits on the intake with your idea will be ok. I like that option better. The collar where the clamp screw has a space like a piston ring in it that would need a dab of silicone to seal it Too
having said that the sleeve is less diameter than the intake opening and the collar not sitting on the intake would need that gap sealed.
once Steve gets a pic of his I’ll know if it sits on the intake with your idea will be ok. I like that option better. The collar where the clamp screw has a space like a piston ring in it that would need a dab of silicone to seal it Too
So you have me looking for spacer material. I found a piece of 1.5 inch aluminum tubing with a wall thickness of around .120 inch. A small block distributor fits nice inside of it. This tubing can be cut to the thickness you need to fill the gap.
Got ya, maybe look at some rear end pinion shims.
James I got measurements,
Sleeve OD is 1.489
Shim needed is only .090
Pinion shims are the right size but I don’t have one that thick so I’m using the aluminum flat bar .080. By the time I add some silicone to both sides for seal I’ll be at the .090. I’ll put the shim on the bottom so the collar is under the distributor flange and it clamps all the top of the sleeve on the distributor shaft.
Sleeve OD is 1.489
Shim needed is only .090
Pinion shims are the right size but I don’t have one that thick so I’m using the aluminum flat bar .080. By the time I add some silicone to both sides for seal I’ll be at the .090. I’ll put the shim on the bottom so the collar is under the distributor flange and it clamps all the top of the sleeve on the distributor shaft.
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Tim, here are the photos of my clamp and distributor sleeve, the sleeve on mine sits below the top of the collar so my mag sets against the collar. If your sleeve does not go down to where its flush or lower than the collar you need to put a spacer under the collar (you will have to make one and don't forget you will need a gasket above and below the spacer). That black spacer on my intake came on there from Hilborn and John (the person who built my motor)
added to that riser for the hold down clamp to pivot on, hope this helps clear things up.
Steve....
added to that riser for the hold down clamp to pivot on, hope this helps clear things up.
Steve....
Tim when you put it altogether with the right shim I would leave that pinch bolt loose on the collar until you tighten down your hold down clamp. Then tighten the pinch bolt and after that you can loosen your distributor clamp adjust your timing. I can't slide that sleeve onto my mag until I loosen that pinch bolt as it reduces the inside diameter of that tube.
Don't forget to allow for gaskets above and below that shim, you can see in my photos my mag was sealed down to the top of the collar with some type of silicone. In case your wondering no I did not pull my mag just to take photos, I took it out as I have been doing some welding on my car and you don't want to do any welding with a mag in the motor. 
With the right gasket material I might be able to use a pinion shim as a spacer. I’ll mock it up and see where it ends up. I can make a shim easy enough out of thin aluminum flat bar. The hold down will take some manipulating. But I have an idea for that. Stay tuned.....
Going through my checklist and “check rocker stud clearance” is on there. Noticed after snugging the covers down The studs dented the covers I’ll have to get the spacers. Don’t think The big gaskets will be enough.
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Shim mock up. With the distributor in the hole it’s engaged in the oil pump shaft and cam gear with .050 up and down play. The sleeve is bottomed out and is tight to the bottom of the distributor flange so it can’t go down in the hole anymore unless some is filed off top of the sleeve. Shims are;
gasket material is Rubber felpro .030 (1/32) Top and bottom of collar and a .030 pinion steel shim to take up the rest of the .090 space. It’s snug at this measurement.
gasket material is Rubber felpro .030 (1/32) Top and bottom of collar and a .030 pinion steel shim to take up the rest of the .090 space. It’s snug at this measurement.
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Tim I think you would need a gasket above and below that shim or some kind of sealer between the intake and underside of the shim. You need to keep a gasket between the shim and the underside of that collar so you can adjust timing as that tube is tight on the distributor shaft after you tighten that pinch bolt the tube will rotate with the distributor during timing adjustments.