sprokets or gears?

[41/53dodges]

what exactly are these? i know cam timing gears/sprockets, but what?

http://cgi.ebay.com/ebaymotors/Dodge-Chrysler-Plymouth-DeSoto-flathead-6-timing-gears-/380284361376?pt=Vintage_Car_Truck_Parts_Accessories&hash=item588ab6daa0

[Young Ed]

Some heavy duty engines have a gear driven cam instead of chain driven. Dads 220 SD IHC motor has that setup. Never seen a mopar flathead with one though.

[41/53dodges]

so then, theorhetically, wouldnt that take a different cam? either that or it would run backwards.

[razerface]

i think there is supposed to be an idler gear in there,,,which makes top and bottom gear run same direction. (3 gears total)

[kencombs]

Those look like a set of sprockets for the double row chain that some industrial engines used. I have a set on the shelf that I took out of a 230 from a forklift.

[41/53dodges]

not sure, the double rows have a groove down the middle, i took one out of a combine. that was the engine i was talking about a few months back. my parts manual does not state anything about any idler gear, though.

[austinsailor]

There were two different style chains. I don't recall which was which or when they changed, but my 40 had one style and my 55 had another. I do recall when I blew up the 40, I put the gears and chain from the 40 on the 55 when the timing chain on the 55 was worn out. Oh, by the way, those were both cars, but I'd guess the trucks were the same.

Gene G.

[Frank Ollian]

I believe timing chain and sprockets changed in 55.

[Dodgeb4ya]

These timing chain sprockets are for 1939-50 Chrysler flathead "8". They look to be coated in cosmoline.

[1937 Dodge]

I have a gear driven cam on my 265 IND engine. We went with a gear driven cam that came out of a Chrysler Crown Marine engine. The Crown Marine cam has more lift than the stock cams while still retaining a smooth idle. We had to put in a different brass gear driven oil pump for correct rotation. The engine has a "different" whirling sound to it vs. the chain driven cam. Makes it a little different from the run-of the-mill flatheads. Gear driven cams were also used on heavy duty truck engines. Not at my home computer right now will send a photo later.

[1937 Dodge]

Here's a photo of the gear driven cam on my IND 265.

[Don Coatney]

Here's a photo of the gear driven cam on my IND 265.

I must assume the cam you are using is specially ground as it spins a different direction than a normal cam yet your crankshaft rotation is normal. Interesting combination. I would like to hear it run some day.