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  #21  
Old 07-03-2018, 01:52 PM
440sixpack 440sixpack is offline
327 Rambler
 
Join Date: Jul 21, 2016
Location: oregon
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The new stuff you buy for the durashart is made overseas as well. so it's just a matter of is it Hopsing making Delco or his brother making Motorcraft.


That's just the world we live in like it or not.
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  #22  
Old 07-03-2018, 02:00 PM
gpcl16 gpcl16 is offline
232 I6
 
Join Date: Apr 02, 2016
Location: California
Posts: 108
For what its worth, I've been running a DUI HEI for 4.5 years and 15k miles with no issues. My switch was to HEI was brought on by my ignition wiring harness being completely destroyed and not wanting to deal with it though. The 1-wire thing is nice for that. I had duraspark systems in Fords that worked quite well and never had issues so I can't knock the Duraspark at all.

Not knowing any better at the time, I used the cam gear that came with the DUI distributor. No issues whatsoever with cam gear wear. I had the timing cover off recently for other reasons and checked it it was just fine. I guess either I got lucky or DUI just makes their gears correctly and out of the correct metal?
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  #23  
Old 07-03-2018, 03:32 PM
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KnoxvilleWag KnoxvilleWag is offline
232 I6
 
Join Date: Mar 05, 2013
Location: Knoxville, TN
Posts: 41
That's a good word. Is there any downside to using the old original gear? I've never done that with any other make/model car that I've replaced the distributor on. But interesting that Summit's website says AMC engines need to replace the cam gear with a new one (on the cam, not the one on the distributor).
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1989 Grand Wagoneer, Rebuilt AMC 360 (300hp, 400 ft.lbs.), Repainted in close-to-original Burgundy (Land Rover "Anniversary Claret" 2006), replaced faux wood decal and rubber trim with 70s style wood stripe and chrome trim.
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  #24  
Old 07-03-2018, 04:20 PM
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rang-a-stang rang-a-stang is offline
304 AMC
 
Join Date: Oct 31, 2016
Location: Camarillo, CA
Posts: 1,940
Quote:
Originally Posted by KnoxvilleWag
...The timing has been a little rough...
What do you mean by that? Do you mean timing is not consistent (bouncing around)? Do you mean you can't find a good timing setting?

They replaced the timing chain in the rebuild, right? Did they use new gears for both the cam and the dizzy? Did they line bore the block?

If your block was line bored, it can slightly shorten the distance between the cam/crank and cause a little slop in the timing chain. If they didn't replace the chain, there's some more slop. If they didn't replace both timing gears (Dizzy/cam) there's some more slop. So add all those up and timing can be rough (bouncing around). Add one or two of them and timing can be a little rough.

Did they degree the cam? If not, it might be off and make it hard to find a good timing setting.
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  #25  
Old 07-03-2018, 04:35 PM
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babywag babywag is offline
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Join Date: Jun 08, 2005
Location: Land of froot loops and cukcoo-nuts, CA
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Again, you really wanna go down this road?

http://www.ifsja.org/forums/vb/showthread.php?t=166631

Get a decent module, and just run a duraspark distributor.
Or get an msd 8519 or clone & msd module(or similar)

All AMC HEI are china made, you may get lucky, but odds aren’t in your favor.
Why take the chance?
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  #26  
Old 07-04-2018, 12:17 AM
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rang-a-stang rang-a-stang is offline
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I'm with babywag on this...
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  #27  
Old 07-04-2018, 07:04 AM
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kansasboy001 kansasboy001 is offline
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Join Date: Nov 06, 2016
Location: Winfield Kansas
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Quote:
Originally Posted by Ristow

apparently BJ's added the "made in the USA" to help move a few distributiors? sad.
"

This is not the only thing bjs lies about the country of origin. Their mechanical fuel pumps are actually from South Korea.
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  #28  
Old 07-04-2018, 09:54 AM
440sixpack 440sixpack is offline
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Join Date: Jul 21, 2016
Location: oregon
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Good grief. it's the exact same distributor GM has used reliably for years. but put it in an AMC and black magic and hindu voodoo sets in and suddenly it's a POS. I guess that's what makes forums stay alive.


As far as the legitimate question about the gear, yes they recommend you change the cam gear for the HEI. just because it's standard practice to not run a new gear against a worn gear . being HEI has nothing to do with it.


I really don't think it's that big of deal , but if you're worried about it put your old gear on the new distributor if it's good. I put MSD gears on both ends but I was rebuilding my engine at the time so it was easy.
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  #29  
Old 07-05-2018, 03:31 PM
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Woodchomper Woodchomper is offline
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Join Date: Dec 17, 2002
Location: Saint Charles, Missouri
Posts: 920
If I were going to drop $300+ on a distributor I would spring for the MSD 3519 over the DUI HEI. It is just a personal preference.

However, I can tell you first hand that Davis (DUI) stands behind their products. First though you have to listen to my story.

I had a friend (recently passed) that at age 71 decided to rebuild his 79 AMC 401 Spirit for Drag Racing. Because he was never a wrench turner, other AMC friends built the car and engine. During the tuning, one AMC friend who had nothing but good luck with Skip White distributors installed one because he thought the Duraspark distributor seemed sloppy. Fast forward to the Dyno tuner that could not get the car to run above 5K rpm without the ignition falling on its face. The tuning bill to find out the distributor was junk was over $200.

Next, my friend realized he had a DUI distributor that he had bought used off of eBay a couple of years before. When we went to transfer the distributor gear the roll pin would not fit because the shaft on the DUI distributor was drilled off-center. My friend contacted DUI and they told him to send in the distributor. When he got it back a week or two later it was completely rebuilt and the shaft was perfectly drilled. We installed the DUI distributor and the car ran great. In this case DUI really stood behind their product! The DUI is a good distributor with a good company behind it. End of story.
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