Blown motor. Lq4 swap? Has anyone tried this
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    Blown motor. Lq4 swap? Has anyone tried this

    I just broke #8 piston on my 05 CTS v. It's supercharged and I think the timing may have been off as well as my employee at work put regular fuel in. We are thinking of running a lq4 6.0 motor with a blower cam and my 2300 magnacharger. Ideally with the lower compression we will have a safer set up. Has anyone ever tried this? I know I'm adding 80 lbs to the front end but I feel it will be a stronger set up.

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    Plenty have done it with success.
    http://dynamicflowconcepts.net/t/superchargers

    2010 Thunder Gray sedan, A6, ebony recaros, LPE 650 (well, sort of), AR headers with (blown out) cats, 22" Magnaflow resonators, 9.1/2.5" pulleys, ID1000's, ZL1 Lid, CNC ported blower, WCCH heads, Mamo Motorsports custom cam, 102mm TPIS TB, DSteck Flex Fuel module, ZR1 HX pump, custom HX tube set, Fluidyne 3X HX,4.5" intake tube, FlyingV installation

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    That's awesome. I couldn't find much on that type of build. Sounds pretty reliable. Thanks

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    You can run an LQ4 in a V1 that originally came with an LS6. I would try to find an LQ9 though. 10.0:1 is plenty low on compression for a Magnacharger

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    if you get and lq4, make sure its an 05 and up because they have stronger internals, mainly the rods. LQ9 is nice, but not worth the premium used cost that people are wanting for them. You can mill the stock heads to 03-.04 to gain a bump in compression to put you right at that 10:1 with stock gaskets, rather than 9:4:1.

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    I found a nice 2006 lq4 for $1400 with 130 km. Does anyone make brackets or plates for the motor mounts. They don't line up now?
    And we are running ls7 lifters, ls9 head gasket and cam, and comp beehive springs with a Maggie 2300. Hoping it stays together and puts down 500 rwhp and about 500 lb torque?? Has anyone tried this. Was hoping with the with the lower compression we could add some timing and keep things safer.
    Last edited by Karch; 05-12-2017 at 06:43 PM.

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    The motor mounts should work? In my experience the holes in the block should be the same drom the ls6 to the lq4?

    Do you have a picture of the issue?

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    I was under the impression that all Gen III engines have the same mounting points and sensor positions across all blocks so it should be a direct swap.
    2014 Chevy SS - 2.9L Whipple, Livernois 1C cam, TCI Flexplate, 6L90E TC, Corsa Sport - 630rwhp
    2012 Holden Ute Thunder Edition - CCW SP500's

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    These are the new adapter plates. I may have explained it improperly before.
    Attached Thumbnails Attached Thumbnails Blown motor. Lq4 swap?   Has anyone tried this-image_1495341146722.jpg

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    I believe the only thing that wont swap is the Alternator bracket. You need to drill the hole on the front of the block as the trucks accessory were in a different location. If you're ok with opening things up, I would open up the ring gap as well depending on how much boost you're running.

    Here's a how to for drilling the extra hold for the alternator:

    https://ls1tech.com/forums/conversio...nator-diy.html
    ATK High Performance Engines
    Street-Strip-Racing Engines

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    Everything is back in place now and we are tapping the block for the alternator. Didn't do anything with internals. Hoping they will be able to stand 500 hp.

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    You shouldnt have an issue there assuming the internals looked good. We have guys here taking out 100K mile 5.3 junk yard engines, opening ring gap, camming and throwing 15-20psi at them and they are living.
    ATK High Performance Engines
    Street-Strip-Racing Engines

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    Internals looked great. Didn't do anything with the ring gap though. Not planning on running much more than 7 to 10 pounds max. Almost scared to drive it again after what happened.


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