Want to run an E67 computer in your LSJ powered car? Its easy!
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From: Livonia, MI
Maybe the switched to it when the switched to the gen II block in 07 with the sensor in the cam gears and what not then. Could have sworn it was different in the earlier years.
Very interesting stuff and thxs for all this hard work. I have the same question if this E67 ecu can run without a BCM connected to power my swapped LSJ engine?
Something else that confuses me:
I measured-up the LSJ reluctor wheel recently and found a different value, but probably because we measured this installed on the crank through the VR sensor bore. I found that the 1st-new-tooth-after-the-gap center is at 116* BTDC (cyl 1, in normal crank rotation direction). Have to see how this relates to your "LSJ is 15 degrees BTDC"... (at what position is this related? Exact in center position of the 2 missing teeth?)
for all the hard work.
Something else that confuses me:
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Both the LE5 and the LSJ use a 58X reluctor wheel. People will say they are clocked differently, and they are correct. With my rough measurements, looks like the LE5 low resolution pulse(the 2 missing teeth part) is 15 degrees ATDC(after top dead cylinder), and the LSJ is 15 degrees BTDC(before top dead cylinder).
Most people who do the LE5 engine swap have the reluctor wheel reclocked so it will work with the LSJ P12 PCM (The P12 is the last powertrain control module GM made. This means it can control both the engine and the transmission. After the P12. GM moved to the ECU/TCU combination. Engine Control Unit and Transmission Control Unit. The E67 is an ECU.)
*****
Both the LE5 and the LSJ use a 58X reluctor wheel. People will say they are clocked differently, and they are correct. With my rough measurements, looks like the LE5 low resolution pulse(the 2 missing teeth part) is 15 degrees ATDC(after top dead cylinder), and the LSJ is 15 degrees BTDC(before top dead cylinder).
Most people who do the LE5 engine swap have the reluctor wheel reclocked so it will work with the LSJ P12 PCM (The P12 is the last powertrain control module GM made. This means it can control both the engine and the transmission. After the P12. GM moved to the ECU/TCU combination. Engine Control Unit and Transmission Control Unit. The E67 is an ECU.)
*****
I measured-up the LSJ reluctor wheel recently and found a different value, but probably because we measured this installed on the crank through the VR sensor bore. I found that the 1st-new-tooth-after-the-gap center is at 116* BTDC (cyl 1, in normal crank rotation direction). Have to see how this relates to your "LSJ is 15 degrees BTDC"... (at what position is this related? Exact in center position of the 2 missing teeth?)
for all the hard work.
Thread Starter
New Member
Joined: 02-27-10
Posts: 156
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From: Crestview, Fl
BTW, I had my car running on an E67 already. Before I found this neat little number in the calibration. With an LSJ reluctor and sensor. It ran like ****, but thats because the computer threw everything off by about 30 degrees. But it ran....
Very interesting stuff and thxs for all this hard work. I have the same question if this E67 ecu can run without a BCM connected to power my swapped LSJ engine?
Something else that confuses me:
I measured-up the LSJ reluctor wheel recently and found a different value, but probably because we measured this installed on the crank through the VR sensor bore. I found that the 1st-new-tooth-after-the-gap center is at 116* BTDC (cyl 1, in normal crank rotation direction). Have to see how this relates to your "LSJ is 15 degrees BTDC"... (at what position is this related? Exact in center position of the 2 missing teeth?)
for all the hard work.
Something else that confuses me:
I measured-up the LSJ reluctor wheel recently and found a different value, but probably because we measured this installed on the crank through the VR sensor bore. I found that the 1st-new-tooth-after-the-gap center is at 116* BTDC (cyl 1, in normal crank rotation direction). Have to see how this relates to your "LSJ is 15 degrees BTDC"... (at what position is this related? Exact in center position of the 2 missing teeth?)
for all the hard work.As for the BCM stuff, there might be a problem. On my 2007 car, it worked great. Since the P12 supports both low/high speed lan and class 2, I am not sure what the 2004-2006 cars used to control the BCM. Running it with no BCM attached? No problem. Simple stuff.
Last edited by lwrs10; Nov 21, 2013 at 08:46 AM.
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I still need to get one in my hands and measure it. To the crank sensor hole the value will be different. I need to get my hands on an engine on a stand and measure it. As I find all of this out the post will be updated. But for now, this window is clocked 15 degrees off center of the crank.
on all the ecu work.
Thread Starter
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Joined: 02-27-10
Posts: 156
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From: Crestview, Fl
if you were to draw a line down the center of the crank with 1 and 4 rod journals at TDC, that window will be 15 degrees to the right of that line at the bottom of the crank, if you were looking it at from the rear(flywheel side).
Joined: 05-15-11
Posts: 27,333
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From: Livonia, MI
I dont think he wants to swap the reluctor wheels. He wants to change where the double key missing part in the ecu Software so it can run with an lsj crank/reluctor.
Maybe now I'll have a use for the two reluctor wheels I just found in my big box of cobalt parts. I have an LSJ and LE5 pair, I could re-drill the LSJ one to match if needed accurately, on a mill.
Joined: 05-15-11
Posts: 27,333
Likes: 584
From: Livonia, MI
How do you guys plan on adding the 2 missing keys once you take more away? 
I think you guys are missing the point. They already make external crank triggers for hybrid builds like this. OP is trying to eliminate this.
I think you guys are missing the point. They already make external crank triggers for hybrid builds like this. OP is trying to eliminate this.
If you wanted to, you could easily replace the missing teeth if you were keeping the stock LSJ wheel and just moving the open spot.
If there's a need, I can do either modification for people.