Thanks for chiming in S. Bretz. I do not know anything about CAN and the hi/lo speed lines. This is my concern as well. I have most everything else worked out except this detail. SC2150 has been a huge help in getting to the final stages. I did not discuss this particular issue with him but I need help in this area from him or anyone who has expertise in this area of computer control. If you could check into this further and post a reply, I would really appreciate it. This is an exciting project that will be very beneficial to many LLT owners and there are a bunch out there. I am ready to go, once these potential computer issues are known to be resolved. I have a new 2014 LFX engine and transmission in my shop waiting for confirmation. Thanks to anyone who can answer this question. Attached are pictures of my 2010 LLT Limited Edition Twin Turbo.
LLT TO LFX ENGINE CONVERSION
I own a 2010 LLT Sequential Twin Turbo V-6, Automatic. My shop engineered, fabricated and installed the entire system. Vince at Trifecta did the tuning, which was great and still using today. He did a wonderful job and the car runs spectacular. It is a daily driver and I have driven 30,000 miles to date with no issues. As most LLT owners know, computer programming has limitations due to the Bosh ECM and very difficult to tune for maximum efficiency. In 2012, GM introduced the LFX engine, which is a much stronger engine and has higher horsepower capabilities. It uses a Delphi ECM, making it easy to tune by most tuners and more HP can be extracted through these tuning capabilities.
With LLT's now getting higher mileage on them and possibly needing new engines, my thoughts are to transplant a LFX engine with the Delphi ECM into the LLT. After much research over the past year, I purchased an LFX engine assembly, complete with wiring and ECM. It is in my shop on an engine stand and I have been evaluating feasibility.
So far, I have verified that the physical engine bolts right in with very few issues except for exhaust connections and very minor plumbing hook ups. Really easy. The in-tank fuel pumps on LLT'S and LFX's are the same, so no issue there. All other mechanical hook ups are the same. There are (2) body plugs that come off the engine wiring harnesses of both the LLT and the LFX's. After carefully looking at them, both of the physical plugs are the same. The pin outs of these (2) plugs are the same, as well, with the exception that one of the LFX engine side plugs have (4) additional pin outs and the LLT has (1) additional pin out in the fuse block plug. I feel pretty confident that these are for later model Camaro's that GM added features to.
My thoughts are that I could install the LFX complete engine/ECM assembly into my LLT, hook up the exhausts and minor cooling connections, etc. and plug the (2) body plugs into the existing mating body plugs on the vehicle and it should work. The extra pin outs on the LFX body plugs would simply terminate at the plugs and do nothing. I can't imagine GM changed anything that would not allow this to be done. Most everything is the same on the Camaro's from 2010 to 2015. Just additional options and features as the years progressed.
I need someone to chime in on the feasibility of this conversion concerning the extra pin outs on the LFX harness and help me further understand the compatibility. I am 95% verified on everything else. So darned close. If this works, this opens up the many, many LLT's that would qualify for this major improvement in a transplant. LFX engines are plentiful and cheap and the engine is a refined unit with much stronger internals, larger valves and better breathing characteristics for those who want more HP. Let's get our heads together to make this happen. I'm ready to do a transplant just as soon as I get my ducks in a row.
With LLT's now getting higher mileage on them and possibly needing new engines, my thoughts are to transplant a LFX engine with the Delphi ECM into the LLT. After much research over the past year, I purchased an LFX engine assembly, complete with wiring and ECM. It is in my shop on an engine stand and I have been evaluating feasibility.
So far, I have verified that the physical engine bolts right in with very few issues except for exhaust connections and very minor plumbing hook ups. Really easy. The in-tank fuel pumps on LLT'S and LFX's are the same, so no issue there. All other mechanical hook ups are the same. There are (2) body plugs that come off the engine wiring harnesses of both the LLT and the LFX's. After carefully looking at them, both of the physical plugs are the same. The pin outs of these (2) plugs are the same, as well, with the exception that one of the LFX engine side plugs have (4) additional pin outs and the LLT has (1) additional pin out in the fuse block plug. I feel pretty confident that these are for later model Camaro's that GM added features to.
My thoughts are that I could install the LFX complete engine/ECM assembly into my LLT, hook up the exhausts and minor cooling connections, etc. and plug the (2) body plugs into the existing mating body plugs on the vehicle and it should work. The extra pin outs on the LFX body plugs would simply terminate at the plugs and do nothing. I can't imagine GM changed anything that would not allow this to be done. Most everything is the same on the Camaro's from 2010 to 2015. Just additional options and features as the years progressed.
I need someone to chime in on the feasibility of this conversion concerning the extra pin outs on the LFX harness and help me further understand the compatibility. I am 95% verified on everything else. So darned close. If this works, this opens up the many, many LLT's that would qualify for this major improvement in a transplant. LFX engines are plentiful and cheap and the engine is a refined unit with much stronger internals, larger valves and better breathing characteristics for those who want more HP. Let's get our heads together to make this happen. I'm ready to do a transplant just as soon as I get my ducks in a row.
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Here is where we are at this point in the project. Wiring identification and functions from LFX engine to LLT body has convinced us that this has a very strong chance of working. So much so, that we are moving forward with the new 2014 engine prep work. Lots to do because this is a twin turbo LLT and we want to minimize transplant time due to this car being my daily driver.
The idea here, is to do as much prep work on the engine stand and at some point early in the new year, we will simply have to dive in and do the engine/transmission transplant. These are uncharted waters, for sure, and don't think it has ever been done, so it should be very interesting. To be honest, the one and possibly only potential issue here is that the CAN BUSS communication issues between the LFX engine to the body could create issues but we are retaining all LLT body control modules in order to not upset any downstream functions.
Engine prep is slow going due to the many details and additions that must be done so that previous LLT modifications and additions will marry to the LFX engine. This project demands no detail to be overlooked and double and triple checks be completed so we aren't chasing down elementary problems that would have nothing to do with the actual engine conversion. This is the latest update.
Notes: Notice in (1) picture of the drivers side, below the valve cover, I have removed the factory oil filter and it's massive casting and replaced it with a custom machined billet remote oil filter plate using a larger remote spin on oil filter mounted on chassis. Also note on the passenger lower side that I have added a billet fuel filter that is a must have, as far as I am concerned. Billet vacuum/boost ports manifold, fuel distribution manifold, etc.
The idea here, is to do as much prep work on the engine stand and at some point early in the new year, we will simply have to dive in and do the engine/transmission transplant. These are uncharted waters, for sure, and don't think it has ever been done, so it should be very interesting. To be honest, the one and possibly only potential issue here is that the CAN BUSS communication issues between the LFX engine to the body could create issues but we are retaining all LLT body control modules in order to not upset any downstream functions.
Engine prep is slow going due to the many details and additions that must be done so that previous LLT modifications and additions will marry to the LFX engine. This project demands no detail to be overlooked and double and triple checks be completed so we aren't chasing down elementary problems that would have nothing to do with the actual engine conversion. This is the latest update.
Notes: Notice in (1) picture of the drivers side, below the valve cover, I have removed the factory oil filter and it's massive casting and replaced it with a custom machined billet remote oil filter plate using a larger remote spin on oil filter mounted on chassis. Also note on the passenger lower side that I have added a billet fuel filter that is a must have, as far as I am concerned. Billet vacuum/boost ports manifold, fuel distribution manifold, etc.
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Today I finished mounting the Elite Catch Cans. Still have some hose hook ups to do but a very sanitary install and tucked away nicely and no heat.
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Here are some pictures of how we are trying the LFX engine compatibility with the LLT without installing the engine.
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Today, constructed a roller platform for engine/transmission assembly so we can start the engine if and when we work out the program compatibility issues. Slow going but making progress.
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