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Anyone running MS on LS1 with wasted spark?


mobythevan

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I also found this on ls1tech:

 

http://www.ls1tech.com/forums/showthread.php?t=670015&highlight=megasquirt

 

it appears he is running fuel only and modified the code to use the falling edge trigger. There is really no description in the thread about MS setup, but by running fuel only he gets away without needing the second cam input and 4 coil drivers.

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Wow, perfect timing to put megasquirt on the LS1. 029y3 code was released beta yesterday and it supports the rising and falling edges for the cam input.

 

Here are the fruits of my research:

 

MS1 and MS2 will run the LS1 in wasted spark mode. Use 2 tach inputs just like I do with my 4G63 in the talon(except set second trigger to rising and falling edge). Instructions are at DIY for the talon tach input mods. Proven to work great on my talon. Use 4 spark outputs (LED circuits for 3) and output3 for the last one. These DO NOT need to be VB921's because the LS1 coil packs have an ingnition amp built into each one. So normal LED transistor circuit should work fine (we'll see). Seems straight forward, so I think I am locked in to go that route, see below for my reasoning.

 

If no one has any gotchas by tomorrow I'll get a kit on order from Matt and get cracking.

 

 

NOTE: I am not using megasquirt because I don't want to use the stock PCM, it is because hptuners is $500, I am missing MAP, MAF and IAC which would be another $150-$180. And then I have to muck with all the weird features like VATS, dual O2 sensors, EVAP, etc. Just buy an old v2.2 MS1 for $140 and be on my way. It what I am comfortable with and know inside and out.

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Just wanted to link the two threads from msefi

 

All the work was already done, now its just up to us to verify there are no bugs.

 

http://www.msextra.com/viewtopic.php?t=23881

http://www.msextra.com/viewtopic.php?p=161308

 

This was a partial quote from DaveW in reference to the LS1:

 

"engine that could have been designed with MS in mind (logic level cam/crank, logic level CoP units, GM air and coolant sensors)"

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