Anyone hear of welding the slot on the vacuum advance canister to limit advance?
#1
Anyone hear of welding the slot on the vacuum advance canister to limit advance?
Combo is below. I am getting to much advance from my distributer at part throttle cruise causing my car to surge. I run 24 degrees initial and 36 degrees total timing all in by 2800 rpm. I was playing around with the idea seeing as it's free for me since i have the welder to do it. That way i could save some coin on buying an adjustable canister. What are your thoughts?
#2
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Re: Anyone hear of welding the slot on the vacuum advance canister to limit advance?
Go ahead and try it, what's to lose? If it doesn't work you'll have to buy an adjustable one anyhow.
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Re: Anyone hear of welding the slot on the vacuum advance canister to limit advance?
yes, you can definitely do this. It's been done before. I've seen more than a few pictures of people doing this.
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Re: Anyone hear of welding the slot on the vacuum advance canister to limit advance?
Crane used to make a limiting cam that would let you limit the amount of vacuum advance more easily than welding and filing the slot. I haven't seen it in catalogs for a while though.
#5
Re: Anyone hear of welding the slot on the vacuum advance canister to limit advance?
That would be a good buy. I dug around a little bit but couldn't find anything. Apeiron, I run about 24 degrees initial and 36 total. I would want to limit the vacuum advance to 10 degrees +/- above idle at the initial total? That's what i'm understanding.
#6
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Re: Anyone hear of welding the slot on the vacuum advance canister to limit advance?
A lot of people weld them, which I have done, but now I prefer to drill and tap for a limiter screw. I'm good about getting the limit right the first time, but the screw is removable for future adjustment.
I also like to run a lot of initial advance (if no computer control), but it can be very hard on your starter unless you use an ignition kill switch for hot starting.
#7
Re: Anyone hear of welding the slot on the vacuum advance canister to limit advance?
A lot of people weld them, which I have done, but now I prefer to drill and tap for a limiter screw. I'm good about getting the limit right the first time, but the screw is removable for future adjustment.
I also like to run a lot of initial advance (if no computer control), but it can be very hard on your starter unless you use an ignition kill switch for hot starting.
I also like to run a lot of initial advance (if no computer control), but it can be very hard on your starter unless you use an ignition kill switch for hot starting.
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#8
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Re: Anyone hear of welding the slot on the vacuum advance canister to limit advance?
I have one picture of one where I grafted a GM HEI advance unit onto a Toyota distributor body. It was a 4 cylinder distributor so the amount of vacuum advance (travel) was far too much.
photo:
http://memimage.cardomain.com/ride_i...623_medium.jpg
#9
Re: Anyone hear of welding the slot on the vacuum advance canister to limit advance?
What I do is just a limiter that screws in from the outside.
I have one picture of one where I grafted a GM HEI advance unit onto a Toyota distributor body. It was a 4 cylinder distributor so the amount of vacuum advance (travel) was far too much.
photo:
http://memimage.cardomain.com/ride_i...623_medium.jpg
I have one picture of one where I grafted a GM HEI advance unit onto a Toyota distributor body. It was a 4 cylinder distributor so the amount of vacuum advance (travel) was far too much.
photo:
http://memimage.cardomain.com/ride_i...623_medium.jpg
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Re: Anyone hear of welding the slot on the vacuum advance canister to limit advance?
Braze it instead
#13
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Re: Anyone hear of welding the slot on the vacuum advance canister to limit advance?
If you want 12* max vacuum advance you want to leave about 1/8" of travel in the arm. I just take some fairly thin plate, cut it as wide as the arm on the canister and zap it on the edges with the welder to hold it in place. That way you can easily break the welds and move it around or take it off.
I was thinking of making my own kit with an adjustable version of this basic idea that's screwed down instead of welded on to allow for adjustability.
I was thinking of making my own kit with an adjustable version of this basic idea that's screwed down instead of welded on to allow for adjustability.
#15
Re: Anyone hear of welding the slot on the vacuum advance canister to limit advance?
If you want 12* max vacuum advance you want to leave about 1/8" of travel in the arm. I just take some fairly thin plate, cut it as wide as the arm on the canister and zap it on the edges with the welder to hold it in place. That way you can easily break the welds and move it around or take it off.
I was thinking of making my own kit with an adjustable version of this basic idea that's screwed down instead of welded on to allow for adjustability.
I was thinking of making my own kit with an adjustable version of this basic idea that's screwed down instead of welded on to allow for adjustability.
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Re: Anyone hear of welding the slot on the vacuum advance canister to limit advance?
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