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Correct length for the 340 TA dual point distributor lead? #2657556
05/21/19 12:47 PM
05/21/19 12:47 PM
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APACHE JUNCTION AZ
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Joesixpack Offline OP
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i have 2585019 nos distributor lead for 340 dual points, my customer installed it on his engine and it seems to be short...does anyone know the correct length of the lead wire from the distributor rubber grommet to the red electrical connector?
i have enclosed pics he sent me of his original
and the nos one installed on his engine
i noticed that year 1 sells a repo lead for both 440+6 and 340+6 and says that they are the same lead, and it looks a lot longer than the one i have

2585019 001.JPGs-l1600 - 2019-05-21T094448.472.jpgs-l1600 - 2019-05-21T094515.300.jpgs-l1600 - 2019-05-21T094501.830.jpg
Last edited by Joesixpack; 05/21/19 12:53 PM.
Re: Correct length for the 340 TA dual point distributor lead? [Re: Joesixpack] #2657619
05/21/19 04:09 PM
05/21/19 04:09 PM
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Lincoln Nebraska
RapidRobert Offline
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He has the intergear clocked wrong which is causing this (dist is clocked wrong).


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Re: Correct length for the 340 TA dual point distributor lead? [Re: RapidRobert] #2657648
05/21/19 05:14 PM
05/21/19 05:14 PM
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62maxwgn Offline
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That wire is for a 340 Prestolite 4 barrel application,the coil bracket is mounted closer to the distributor. The positioning of the 6 barrel bracket requires a longer wire.Also,the distributor drive gear is off,advance canister should be about parallel with back of block when timed correctly.

Re: Correct length for the 340 TA dual point distributor lead? [Re: 62maxwgn] #2657660
05/21/19 05:49 PM
05/21/19 05:49 PM
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How could that be?
Any further towards the front and it would hit the oil sender?

Re: Correct length for the 340 TA dual point distributor lead? [Re: BDW] #2657707
05/21/19 07:20 PM
05/21/19 07:20 PM
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RapidRobert Offline
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It needs to be in front of the sender. (1) turn the dampener to your desired initial (IE 18 btdc #1 compression) (2) clock intergear so with dist installed the rotor is pointing forward & slightly toward the pass side. (3) turn housing so the can is on the pass side in front of the sender with room to be turned a bit (4) then turn housing slightly till the nearest tooth is dead even with the magnet (5) plug in the #1 plug wire in the cap terminal directly above the rotor then the rest of em on around CW. Hopefully the rotor trailing edge is at the cap terminal trailing edge as rotor phasing will shift it back CCW (you have leeway there). EDIT & what Max said about the coil location (not my area).

Last edited by RapidRobert; 05/21/19 07:48 PM.

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Re: Correct length for the 340 TA dual point distributor lead? [Re: RapidRobert] #2657723
05/21/19 07:56 PM
05/21/19 07:56 PM
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Can you give more details on this?

(2) clock intergear so with dist installed the rotor is pointing forward & slightly toward the pass side.

Is is just shifting the plug wires in the cap?

Re: Correct length for the 340 TA dual point distributor lead? [Re: BDW] #2657743
05/21/19 08:36 PM
05/21/19 08:36 PM
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RapidRobert Offline
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Sure, You would stick a large screwdriver in the intergear slot & turn it CW to raise the teeth up above the cam gear teeth so it can turn CW (some intergears are tight with buildup & need a stout L shaped tool under it to get it to raise up). Just move it CW then let it set back down/mesh on the cam gear to where with the dist installed, the rotor is pointing forward & slightly toward the pass side (as you know the dist can be flipped 1/2 turn). Actually you can clock the intergear anywhere & just plug in the #1 above the rotor but maintaining the OE diagram (my suggestion) lets the plug wires nestle the neatest with the shortest lengths possible & keeping the OE setup on this area can help prevent future mistakes (not a dealbreaker but everything in a positive direction is a bennie). (1) clock it to OE (1A) can moved forward on pass side (3) coil location potential issue (not my area of knowledge). EDIT with this being dual points, I think they fire when the 2nd set of points "just" opens, grab your test light or ohmmeter. MORE EDIT prestolite dual point dist- with the can sideways toward the pass side (lets say that is 3 0'clock), the point wire is up at 1 0'clock

Last edited by RapidRobert; 05/21/19 11:37 PM.

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Re: Correct length for the 340 TA dual point distributor lead? [Re: RapidRobert] #2657930
05/22/19 10:23 AM
05/22/19 10:23 AM
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north of coder
moparx Offline
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what puzzles me about that wire being NOS, is the red crimped on connector at the coil, instead of being a black molded on [for lack of a better description] connector. shruggy
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Re: Correct length for the 340 TA dual point distributor lead? [Re: moparx] #2657931
05/22/19 10:25 AM
05/22/19 10:25 AM
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Originally Posted by moparx
what puzzles me about that wire being NOS, is the red crimped on connector at the coil, instead of being a black molded on [for lack of a better description] connector. shruggy
beer


I thought the same

Re: Correct length for the 340 TA dual point distributor lead? [Re: Sniper] #2657950
05/22/19 11:22 AM
05/22/19 11:22 AM
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north of coder
moparx Offline
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somehow, it seems to me that possibly, that wire was cut for some reason, then the red terminal was attached. now, for the correct application, it's too short. just my opinion.
beer

Re: Correct length for the 340 TA dual point distributor lead? [Re: moparx] #2658602
05/23/19 10:43 PM
05/23/19 10:43 PM
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RapidRobert Offline
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X4! on the red crimp terminal (I missed that early on). Certainly not OE


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Re: Correct length for the 340 TA dual point distributor lead? [Re: RapidRobert] #2658663
05/24/19 07:14 AM
05/24/19 07:14 AM
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62maxwgn Offline
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If the wire was O.E.,it would have this terminal,sleeve would be red with minimal crimp.

P4170072.JPGPB210480.JPGPicture 295.jpg
Re: Correct length for the 340 TA dual point distributor lead? [Re: 62maxwgn] #2658709
05/24/19 10:20 AM
05/24/19 10:20 AM
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moparx Offline
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i can certainly agree with the "D" shaped terminal end, but in the 50+ years of playing with this stuff, the ends were all molded, unless the ends got damaged. at one time, i remember a service part at the one auto parts store [it may have been a universal part] in the electrical section that was "D" shaped with a red insulation like the one shown.
but remember here, i'm old, and certainly not an expert on anything, so shruggy
beer

Re: Correct length for the 340 TA dual point distributor lead? [Re: moparx] #2658728
05/24/19 11:17 AM
05/24/19 11:17 AM
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you can certainly see the D in Williams' pics


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Re: Correct length for the 340 TA dual point distributor lead? [Re: BDW] #2658869
05/24/19 07:38 PM
05/24/19 07:38 PM
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Portsmouth, VA
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Copy/paste from another website -

The no1 cylinder must be on the compression stroke, and the no1 wire must go to wherever the rotor points. If the rotor is NOT pointing to the "by the book" no 1 cap tower, it will run fine, but if you want to do it correctly it simply is not that difficult and takes VERY little time

To time a SB Mopar:

1--- Determine that no1 is on the firing stroke and there are two ways to do that. If either valve cover is still off, look at either the no1 or no6 valves, with the timing marks on TDC. IF both no1 valves are closed, no1 is ready to fire (compression) and if no6 valves are both closed, then no6 is ready to fire. BE CAREFUL because the opposite two will be nearly equally open (used to be called "split overlap) and it can fool you

The alternate way to determine compression, is to remove no1 plug, stick you finger in the hole, and either bump it on the starter, or wrench it around until you BEGIN to feel compression. You may need to go around once to be sure. When you start to feel compression, pay attention to the timing mark, and slowly bring the engine up NOT to TDC but to where you want the timing, IE 10-12 with a bone stock cam, or 15-20 with a hot cam

2---If there is any reason to suspect the distributor gear is in wrong, or this is a new build, bring the marks to TDC, and check the position of the slot in the gear. IT should point to the far left (drivers side) front intake manifold bolt, which is a close as you'll get to "straight ahead." If it does NOT, as the poster above suggested, just take a big screwdriver and "walk" the gear up out of the helix, and correct it

3---(If you performed step 2, back the engine up with a wrench about 1/8 turn, and bring the marks back NOT to TDC, but where you want the timing.)

Next, with the rotor pointing towards the area of the "by the book" no1 hole, and the vacuum can "in the clear away from the firewall, drop the distributor in. By rotating the distributor body, you should reach a point where the vacuum can is clear of the coil and the firewall, and the rotor is pointing to the no1 cap tower

4---Now, if you have points ignition, use a test lamp or ohmeter, rotate the dist. RETARD (cw) and move it slowly ADVANCE (ccw) until the points just open

If you have breakerless set the dist. so that the reluctor tip is centered in the pickup coil.

5---Start the engine!!!! Notice that I did not say, "prepare for fire out of the carburetor," nor did I say "screw endlessly with the distributor for hours on end."

If you followed this correctly the engine should start!!! and run!!!!

6---Now take your timing light and adjust the timing as necessary.

smallblock.jpg
Re: Correct length for the 340 TA dual point distributor lead? [Re: DusterW2] #2658980
05/25/19 07:49 AM
05/25/19 07:49 AM
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Later model DP have the red sleeve. The D terminal is more of a copper terminal, the reproductions are not a perfect match so you can see the different. Also, can see in the pictures.

All the clocking also depends on the shaft and Cam Stop being correct for the application. Some cam stops have the flat for the rotor clocked in a different position, and some shafts have the tip slot oriented different.

So if you build motor correctly and follow svm for setting distributor drive gear slot correctly, and you put distributor in with vacuum chamber pointing correctly your rotor points to #1 plug. IF that does not match normal wire location, that normally means the distributor has some incorrect parts. If the camstop is a dp and correct rotation type Right or Left depending on motor, you just have to reorient wires. Or go get the correct parts for the distributor if you can find them.

Re: Correct length for the 340 TA dual point distributor lead? [Re: dragon slayer] #2659017
05/25/19 10:04 AM
05/25/19 10:04 AM
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north of coder
moparx Offline
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as several others have said the later duel point distributors came with the red, crimp on, wire end, this old dummy learned something new. up
next question, what year did that start ? it obviously ended when the duel point was ended, which was what, '71 ? did that also include duel point big block distributors ?
beer







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