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Farmall & IHC Tractors Discussion Forum

Delco distributor

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Roger in Wisconsin

04-16-2019 05:18:34

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Is the advance curve different on a Delco distributor verses a Farmall for a H or M?

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pete 23

04-16-2019 16:47:36

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 Re: Delco distributor in reply to Roger in Wisconsin, 04-16-2019 05:18:34  
I believe the Delco relied on the springs to limit the total advance (up to a point of course) where the IH always used a slot in the lower plate to stop the total advance. So, the Delco could give much more advance say on an H than on an M due to more rpms. I also believe they were pretty long on the advance and if you have domed pistons or fire craters it would be totally wrong under load. Engines that don't use vacuum advance or computer controlled spark advance always sound to run better when they are over advanced while not under load. Just saying.

I never stand on my head to replace points etc on a IH distributor because it is so simple to take them off so you can properly clean up the advance and adjust the points so they align properly also. Always need to be retimed when you change points anyway.

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D Slater

04-16-2019 06:08:38

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 Re: Delco distributor in reply to Roger in Wisconsin, 04-16-2019 05:18:34  
Some used on a H or M had about 30 degrees total advance compared to 40 for original M and H. SM used 30 and some with higher compression had or now use 22, 25 or even 16 on later LP.

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Roger in Wisconsin

04-16-2019 14:43:47

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 Re: Delco distributor in reply to D Slater, 04-16-2019 06:08:38  
I found a nice Delco and put it on my 41 H, just because I don't like to stand on my head to do a tune up. The tractor seems to run much better at all speeds. Maybe the springs on the old one were wore out.

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