Myotis1134 Posted March 14, 2011 Report Share Posted March 14, 2011 Can anyone tell me anything about sticking a GM LLT 3.8 DI engine into a w-body? I'm pretty sure it will fit in the engine bay, but my concerns are mainly about transmission compatibility - will some conversion hardware be necessary (probably yes), as well as mounting issues. I understand that damn near anything is possible, given you throw enough $ and time at it, and I foresee gains in performance (due to the engine being direct injection), but I'd like some feedback from some of you who know what you are talking about. The engine I'm considering is explained here: http://www.fullthrottlev6.com/forums/showthread.php?60659-Camaro-3.6-LLT-engine-specs-description& My concern begins from the statement "FWD applications matched to 6T75 six speed automatic transmission" which is apparently the stock transmission that bolts up to the engine. Possibly this is not the case, as many engines have the capability to use different transmissions, and I admit I have not seriously researched all the transmissions that are possible to use with this engine. However, if this is the tranny to use in combination with the engine, will it fit under my car ('91 chevy lumina euro). These are the things I need to know. Quote Link to comment Share on other sites More sharing options...
Jonpro03 Posted March 14, 2011 Report Share Posted March 14, 2011 Do you mean the 3600 direct injection? The best choice for your car would the 3600 from a G6 GXP. It's not direct injected and you loose about 30hp. But it's already a FWD engine so you won't have to make custom mounts and intakes and stuff. If you get the motor, trans ECM and PCM than you could make it happen. Basically just find a wrecked G6 with 3600 and get to work. Quote Link to comment Share on other sites More sharing options...
BXX Posted March 14, 2011 Report Share Posted March 14, 2011 That engine and trans combo have a ECM and TCM, both of which also have to communicate via CAN, and the PCM runs CAN as well and needs a BCM communication and IPC communication to work correctly and even start and run for that matter. Quote Link to comment Share on other sites More sharing options...
Myotis1134 Posted March 15, 2011 Author Report Share Posted March 15, 2011 Sorry people, it is in fact a 3.6. In the case of the LLT, I would attempt to come into possession of a 2008 Cadillac CTS. One that came with the 3.6 L direct-injection V6 VVT engine, and that had the shit kicked out of it by a large truck. After that it's easy- swap out as much of the electronics as possible and hope it fits, then hope you can tweak the programming and hope it works. If it doesn't work, there is always the G6 to consider. Quote Link to comment Share on other sites More sharing options...
BXX Posted March 15, 2011 Report Share Posted March 15, 2011 Well you would have to do a FULL electrical system swap, everything from PCM/TCM to window switches. Not to mention, the fuel pump, somehow make it all fit properly in your fuel tank. And the shit kicker, 08 CTS is not supported with HP Tuners, and IIRC, its not supported with EFI Live either, so tuning is out the door. Quote Link to comment Share on other sites More sharing options...
Jonpro03 Posted March 15, 2011 Report Share Posted March 15, 2011 I think the gauge cluster is part of the CAN network too. So that also has to be swapped. Quote Link to comment Share on other sites More sharing options...
BXX Posted March 15, 2011 Report Share Posted March 15, 2011 That engine and trans combo have a ECM and TCM, both of which also have to communicate via CAN, and the PCM runs CAN as well and needs a BCM communication and IPC communication to work correctly and even start and run for that matter. Quote Link to comment Share on other sites More sharing options...
virtuetovice Posted March 15, 2011 Report Share Posted March 15, 2011 To put things simply, way more of a pain in the ass than it's worth unless you have some kind of ungodly attachment to that motor. Quote Link to comment Share on other sites More sharing options...
BXX Posted March 15, 2011 Report Share Posted March 15, 2011 It would just be easier to buy a pay off a CTS:lol: Quote Link to comment Share on other sites More sharing options...
Jonpro03 Posted March 15, 2011 Report Share Posted March 15, 2011 I think it would be easier to Megasquirt it. Quote Link to comment Share on other sites More sharing options...
Crazy K Posted March 15, 2011 Report Share Posted March 15, 2011 lets assume that you can even run this engine on OBD 2, not including the inability to use the variable valve timing... being DI it has to 100% SFI all the time, and with a greater accuracy than any SFI equipped W has ever achieved. is that even doable? Quote Link to comment Share on other sites More sharing options...
Myotis1134 Posted March 16, 2011 Author Report Share Posted March 16, 2011 Well obviously the engine would need all it's electrical and management systems to come along with it in order to work properly/at all. I was mainly interested in the engine strictly because it is a v6, and has direct injection, which I have been led to believe has enormous potential tweaking capabilities. From what has been said so far about such a swap though, it appears that a project of this magnitude would be a major pain in the ass, which is why I asked about it in the first place- to see if it was doable and feasible. Guess I'll stick with my plans for the supercharged 3.1. Thanks for the info guys. Quote Link to comment Share on other sites More sharing options...
Jonpro03 Posted March 17, 2011 Report Share Posted March 17, 2011 On 60*V6 forums, there's currently work for a M90 lower intake manifold. Quote Link to comment Share on other sites More sharing options...
Myotis1134 Posted March 18, 2011 Author Report Share Posted March 18, 2011 I got a quote from jbodyperformance.com a while ago. They told me they could make a lower intake manifold for approx. $1,000, for whatever SC I wanted to use. I got the quote for a M62 though, How much difference between the M90 and 62? Quote Link to comment Share on other sites More sharing options...
Jonpro03 Posted March 18, 2011 Report Share Posted March 18, 2011 I don't pretend to know anything about superchargers. Quote Link to comment Share on other sites More sharing options...
xtremerevolution Posted March 18, 2011 Report Share Posted March 18, 2011 I got a quote from jbodyperformance.com a while ago. They told me they could make a lower intake manifold for approx. $1,000, for whatever SC I wanted to use. I got the quote for a M62 though, How much difference between the M90 and 62? The m62 is a bigger heat factory than the m90. Don't even think about the m62. m90 or m112 if you can afford it are your best options without going procharger or turbo. Imo turbo would be easier and cheaper to boot. Sent from my HTC Awesome using Tapatalk Quote Link to comment Share on other sites More sharing options...
virtuetovice Posted March 18, 2011 Report Share Posted March 18, 2011 (edited) I got a quote from jbodyperformance.com a while ago. They told me they could make a lower intake manifold for approx. $1,000, for whatever SC I wanted to use. I got the quote for a M62 though, How much difference between the M90 and 62? AS far as I know the m90 displaces much more air per revolution than the m62. Visually the m90 is a bit bigger than the m62. I cannot tell you the differences between the bolt pattern of them, though. If i remember correctly, the number behind the M represents how many cubic INCHES per revolution, the supercharger displaces. Edited March 18, 2011 by virtuetovice Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted March 18, 2011 Report Share Posted March 18, 2011 a M62 MIGHT work with a 3.1/2.8, but any gen3 or better 60V6 would be choked by it. M90s are cheap and plentiful anyways, can't tell you the last time i saw a M62... i have to agree with andrei though, turbo is WIN. Quote Link to comment Share on other sites More sharing options...
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