Supercharging LS6
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2004-2007 Cadillac CTS-V Performance Mods Discussion, Supercharging LS6 in Cadillac CTS-V Series Forum - 2004 - 2007; I am planning to supercharge my 05 LS6 this winter. What are the options? who has the best price? I ...
  1. #1
    Johnson's Avatar
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    Supercharging LS6

    I am planning to supercharge my 05 LS6 this winter. What are the options? who has the best price? I have seen the magnuson kit for $6500 on stillen's site and I see dragonrace sells a 3.3l kit, havent got pricing on that yet. The current mods are Kooks 1 3/4 LT w/cats and Magnaflow Cat Back, K&N CAI, Tuning, Gforce Axles. Any recommendations? things to consider? Thanks

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    rand49er's Avatar
    rand49er is offline Cadillac Owners 10000+ Posts
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    Re: Supercharging LS6

    All I can respond to is Magnuson's MP-112 supercharger.

    From a driveability standpoint, a maggie on an LS6 feels absolutely like stock except when the throttle is opened near WOT. It is incredibly reliable as well. I have 30k miles (48k km) on mine with only a few serpentine belts as casualties. (You always want to carry an extra in the trunk just in case.)

    Two guys who were considering a maggie have driven my car, and I encourage you to talk to them (not me) about their experience: JD03Cobra and lollygagger8


    Good luck! I'm sure you'll be very happy regardless of which way you go.
    '05 CTS-V, Maggie, Kooks, Hotchkis, Ground Control, Corsa, B&M, DSS/Hendrix, Full 3M Clear Bra, Autovation, V Headrests, CTS Console, STS-V 55w Fogs, Black Vette FRCs, Specter Werkes, Katech LS9 Clutch, SS Brake Lines, Heavymetals U-Turn Fuel Line Eliminator, Momo Combat Evo Shift Knob, Wldwhl Clear Sidemarkers, Linea Corse LC855 Wheels or OEM wheels w/'06-'07 Center Caps, plus a couple more. 472 RWHP/411 RWTQ (Mustang Dyno).

  4. #3
    soulja's Avatar
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    Re: Supercharging LS6

    I second what Rand49er says. I just installed a Magnacharger mp112 on my car not too long ago and it is awesome. I even have the 3 inch pulley and it pulls, so I know I will be very happy once I put the 2.7 on it.

    BTW, there is a guy on LS1Ttech selling his for $4500.

  5. #4
    Brackets is offline Cadillac Owners Fanatic
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    Re: Supercharging LS6

    Hey Randy, could you please check your messages? I just sent you a pm. Thanks, Brad.

  6. #5
    RyRidesMotoX is offline Cadillac Owners Enthusiast
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    Re: Supercharging LS6

    Quote Originally Posted by rand49er View Post
    All I can respond to is Magnuson's MP-112 supercharger.

    From a driveability standpoint, a maggie on an LS6 feels absolutely like stock except when the throttle is opened near WOT. It is incredibly reliable as well. I have 30k miles (48k km) on mine with only a few serpentine belts as casualties. (You always want to carry an extra in the trunk just in case.)

    Two guys who were considering a maggie have driven my car, and I encourage you to talk to them (not me) about their experience: JD03Cobra and lollygagger8


    Good luck! I'm sure you'll be very happy regardless of which way you go.
    Out of curiosity, why do the serpentine belts fail? Are they rubbing on something? Is it a fairly common issue? I want to supercharge mine in the future but I want to get as much info as possible first.

  7. #6
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    Re: Supercharging LS6

    Randy has described the Maggie experience exactly how I felt when I drove his car. Drives just like stock, and then when the skinny pedal goes down.....beast mode engaged

  8. #7
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    Re: Supercharging LS6

    Quote Originally Posted by RyRidesMotoX View Post
    Out of curiosity, why do the serpentine belts fail? Are they rubbing on something? Is it a fairly common issue? I want to supercharge mine in the future but I want to get as much info as possible first.
    This problem initially was due to the weak belt tensioner Magnuson was sending out with the kit. They have since beefed it up and should not be a problem when running the 2.8 pulley that comes on the supercharger now. Plus, many guys run the Goodyear Gatorback belts which are very good. One another note, many guys are running smaller pulleys so they go with an even stronger belt tensioner from EC. I am running an LS3 tensioner from Mangason, it's supposed to be stronger then there beefed up on for the LS6. I will be going to a 2.7 pulley this week, from a 3.0 pulley, so I hope not the see belt slippage.

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    Re: Supercharging LS6

    My '04 LS6 just ticked over the 100,000 mile since adding my maggie mark. I changed the serp belt after about 80k maggied miles but the old belt was still in good shape. I just got tired of having the spare in the trunk. I'm a pretty spirited driver and have not had any engine problems except for a failed throttle body (motor on the throttle body actually) but I don't think the maggie had anything to do with that failure.

    Needless to say, I'm a fan of the maggie route for supercharging
    '04 Platinum, Maggie, Corsa cat back, StealthV tune, UUC short throw shifter, Autovation Pedals, Lingenfelder CAI, GC coilovers, Hotchkis sway bars, UUC braided brake lines, Katech LS9 clutch, Level V RPM Transmission, Creative Steel engine & trans mounts

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    Re: Supercharging LS6

    Thanks for the feedback guys. Where is the cheapest place to get a new Magnuson kit?

  12. #11
    RyRidesMotoX is offline Cadillac Owners Enthusiast
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    Re: Supercharging LS6

    Quote Originally Posted by soulja View Post
    This problem initially was due to the weak belt tensioner Magnuson was sending out with the kit. They have since beefed it up and should not be a problem when running the 2.8 pulley that comes on the supercharger now. Plus, many guys run the Goodyear Gatorback belts which are very good. One another note, many guys are running smaller pulleys so they go with an even stronger belt tensioner from EC. I am running an LS3 tensioner from Mangason, it's supposed to be stronger then there beefed up on for the LS6. I will be going to a 2.7 pulley this week, from a 3.0 pulley, so I hope not the see belt slippage.
    Thanks for the reply. that doesnt seem like a huge deal... especially for the power increase and the sound the maggie makes when you mash the loud pedal.

  13. #12
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    Not to hijack the thread, Im collecting info to do the same to my ls2 but with the 6th gen. I read one person say lingenfelter no longer sells their kit(?). Is the 6th gen still an option for the ls2 or am I stuck looking at the mp112? I realize the cost to power ratio is ridiculous.

  14. #13
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    Re: Supercharging LS6

    I wouldn't do a Maggie 112...I already had one. It was nice and reliable, but they max out at 500whp and become a furnace when turned up with a smaller pulley. I just got my E Force 2300 that I will be installing upon my return home. Granted, its not a kit like the Maggie, and you have to source the HEX portion (which is not really too bad, stuff is easily available) but I will have a 2300 TVS for less than the price of a new Maggie 112. I have already posted over on LS1 Tech with pics of the assembly as well as the parts list required...and will document my build so that it can be duplicated (or improved upon) by anyone. Just have to get back home first!

    Here is the original post: http://ls1tech.com/forums/cadillac-c...ery-today.html

    BTW - Ligenfelter is a joke...don't ever buy anything from those fools unless you want it known that you have much more money than sense.

  15. #14
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    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: Supercharging LS6

    DMM, what specific problem did you have with Lingenfelter?

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