wally
New Member
Posts: 5 
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Post by wally on Jan 6, 2018 19:29:50 GMT -5
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Post by casias on Jan 7, 2018 7:07:51 GMT -5
Very nice. What year is the Dodge ECM?
2000 Durango ZL1 AWD
1999 Dakota R/T 6.0/6l90
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Post by cncdakota on Jan 7, 2018 13:54:32 GMT -5
This makes sense. I did a carbureted SBC swap in a 4WD S10 blazer a few years ago, and I wanted to use a 4l60. In order for the factory ECM to control the trans, it needed to see the coolant temp, MAP sensor, throttle position sensor, and RPM (from the crank sensor). I simply took the reluctor ring from the 4.3L V6 and put in on the V8 and mounted the sensor in a TBI truck timing chain cover. As far as the computer was concerned, it saw a running V6 engine and everything worked perfectly. I put about 30,000 miles on that setup with no issues. Looking around the forums, it seems that people have been successful with this method on Jeeps. There's a setup available here, but I don't know if it would be the same for a Dakota: www.rpmextreme.com/Product/179/LS-Swap-GEN3-Balancer-Reluctor-Ring-Kit.aspxThere's also one available for 4BT swaps as well: www.jdtruckcustomizing.com/jdtruck/crankshaft.ashxI feel pretty confident that this should work. I'm certainly going to give it a try. |
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Post by casias on Jan 7, 2018 14:50:45 GMT -5
Cool. Someday I want to try to run a MAGNUM with an LS wiring harness and ECM. I would like to have the tunability of HP tuners, and I have MAGNUMS stacked on the back porch. I figure I need ECT, crank and cam signals, plus the MAF.
2000 Durango ZL1 AWD
1999 Dakota R/T 6.0/6l90
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Post by cncdakota on Jan 26, 2018 11:33:28 GMT -5
Wally,
Not sure if you got to testing this yet, but I just spoke with shawn at Jeff Daniels Jeeps here in PA about how they do this for their diesel swaps. He told me that the ECU will probably need to see both the crank and the cam sensors. The impression I got was that the signal from the cam sensor is what "wakes up" the ECU and then makes it look at the crank sensor to read RPMs. I hope this helps you out!
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wally
New Member
Posts: 5
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Post by wally on Feb 21, 2018 8:23:23 GMT -5
Wally, Not sure if you got to testing this yet, but I just spoke with shawn at Jeff Daniels Jeeps here in PA about how they do this for their diesel swaps. He told me that the ECU will probably need to see both the crank and the cam sensors. The impression I got was that the signal from the cam sensor is what "wakes up" the ECU and then makes it look at the crank sensor to read RPMs. I hope this helps you out! Thanks for that cam sensor tip. Not tested yet but I'll know what else might be needed. |
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Post by V8SB on Feb 26, 2018 7:34:10 GMT -5
Dodge tach with LSx engine possible solutions addressed here: ls1tech.com/forums/conversions-hybrids/1553358-world-s-easiest-5-3-swap-dodge-dakota-7.html#post19829955Start w/ post 132 and read forward. Cheap way out is a $50 adapter from Baker Electronix. If you already have HP Tuners you can try setting the tach signal at 3/3 and then using the tach output wire from the GM harness as the crank sensor output for the Dodge harness. Number of pulses will be the same, only difference I see is the GM sensor runs on 5V and the Dodge runs on 12. |
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Post by cncdakota on Aug 20, 2018 9:20:41 GMT -5
Just wanted to follow up on this. I was finally able to get my truck fired up for the first time this weekend. I can now confirm that the factory tach will work if the Dakota PCM sees the inputs for both the cam and crank sensors. In my case, I used the tach signal output wire on the Vortec PCM to send the pulsed input for each of these: For the crank sensor input I'm running it through a Dakota Digital SGI-8E to convert it to the correct number of pulses. As for the cam sensor, the pulse count doesn't matter. It just needs to see something, so that one's just spliced into the tach signal before it's re-calibrated. It was so nice to see the tach needle moving when I started it up!
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Post by casias on Aug 21, 2018 17:40:13 GMT -5
Nice work!
2000 Durango ZL1 AWD
1999 Dakota R/T 6.0/6l90
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wally
New Member
Posts: 5
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Post by wally on Dec 10, 2018 13:40:04 GMT -5
We were able to get the tach working and it did take both the crank and cam signals. This 1999 RT with 5.9 had a eight pulse trigger in the crank and once every 180 degrees on cam rotation state change. We made a crank trigger wheel for the LS balancer and used a Arduino divide by eight setup to simulate a cam signal. You tube video youtu.be/MaUBzAIifRo |
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Post by newls99 on Sept 29, 2021 0:52:45 GMT -5
Nice work! 2000 Durango ZL1 AWD 1999 Dakota R/T 6.0/6l90 How much if you don’t mind me asking ? Just purchased 4wd 5.2 Durango. Wanting to swap by January. Thanks for the inspiration. |
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