Re: Welded up dist slots/FBO plate?
[Re: Challenger]
#2769920
04/30/20 06:55 PM
04/30/20 06:55 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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lewtot184
So I presume you welded your on the outside of slot? outside
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Re: Welded up dist slots/FBO plate?
[Re: crackedback]
#2769943
04/30/20 08:09 PM
04/30/20 08:09 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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on a side note there was something awhile back & the guy said the center hole on the FBO plate is too big (dont remember the rest of it)
live every 24 hour block of time like it's your last day on earth
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Re: Welded up dist slots/FBO plate?
[Re: RapidRobert]
#2769958
04/30/20 08:55 PM
04/30/20 08:55 PM
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Joined: Jun 2006
Posts: 5,162 CT
GTX MATT
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master
Joined: Jun 2006
Posts: 5,162
CT
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I would weld the inside, the geometry of factory Chrysler distributors is such that the outside of the travel combined with a heavy spring helps get a very slow progressive curve, which is actually what you want (1-2 degrees / 1000 RPM).
If you're going to set it all in at 2000 or 2500 it won't really matter much though. But still will pre-load a super light spring (like the Mr Gasket/Trans Dapt/Mopar springs which are all the same) more to keep you steadier at idle.
And if you do a bad job welding and it falls out you won't end up with too much advance.
Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street
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Re: Welded up dist slots/FBO plate?
[Re: lewtot184]
#2770105
05/01/20 11:19 AM
05/01/20 11:19 AM
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Joined: Mar 2007
Posts: 3,278 West Coast, USA
jbc426
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master
Joined: Mar 2007
Posts: 3,278
West Coast, USA
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To limit the mechanical advance mechanism's travel, you weld the end of the slots that the advance arms contact when it advances. I found that chainsaw files are the perfect size to file and shape the slot with after welding. It's a bit of trial and error, but you must use a dial back timing light to see the effects your welding and filing have resulted in.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Welded up dist slots/FBO plate?
[Re: lewtot184]
#2770220
05/01/20 05:35 PM
05/01/20 05:35 PM
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Joined: Jan 2003
Posts: 3,122 Auburn WA
Dave_J
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master
Joined: Jan 2003
Posts: 3,122
Auburn WA
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if the slots are being welded up a person needs to keep in mind that .0154" is one distributor degree. the pin on the centrifugal weight is real close to .25". so, if you want 9 distributor degrees for example all you need is a 9/64" drill bit to fit between the open section of the slot and the centrifugal weight pin. very simple, no special timing lights or anything needed. it's always best to set total timing in a performance application but by simply doing the math initial timing settings will get you pretty close to the desired total. I've been doing this for decades on mopar distributors; it's not rocket science. Me too.
Retired, US ARMY 1973-1994 ASE mechanic, Electrical 1994-1997 Retired GTE/VERIZON/FRONTIER 1997-2015
Posting cheap tech help (CRAP) here since Nov 97, 1000's of posts, some may be good.
03 Suzuki Burgman 650(Burger King) Scooter 65 Formula S Cuda 78 Little Red Express Truck 98 Buick Regal (wifes car)
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