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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Horsepower mods in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; I would like to compile a list of mods that result in HP gains with the aprox, gains annotated. I ...
  1. #1
    newy0rktrini is offline Cadillac Owners Fanatic
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    Horsepower mods

    I would like to compile a list of mods that result in HP gains with the aprox, gains annotated. I know gains cannot be truly identified without a dunno test but this is just for us guys who like to plan our next project to make our cars better.

    I have a 2006 3.6L sport

    So far I have:

    Volant air intake- up to 18hp
    RX iceolater IM spacer - up to 20hp
    Pulstar spark plug - unk

    What other mods are there to kick up HP gains?

    Ported throttle body? ...."... What else

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  3. #2
    san2cci's Avatar
    san2cci is offline Cadillac Owners Fanatic
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    Re: Horsepower mods

    Not much left; get an aftermarket exhaust...and tuned/dyno and then there isn't much left. You could always sell your car, and buy a CTS-V
    Argent1 and Argent1 like this.

  4. #3
    Lzr
    Lzr is offline Cadillac Owners Fanatic
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    Re: Horsepower mods

    vmax seems to give the most for the money
    then the volant
    after that dyno and tune becomes expensive for only another 20 hp or so

    could also maybe add a catch can, probly won't make more hp, but will help the engine run cleaner

  5. #4
    Bluehaze07's Avatar
    Bluehaze07 is offline Cadillac Owners Connoisseur
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    Headers???? *ducks*

  6. #5
    san2cci's Avatar
    san2cci is offline Cadillac Owners Fanatic
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    Re: Horsepower mods

    I doubt they make headers for our car

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    newy0rktrini is offline Cadillac Owners Fanatic
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    Anyone thought about replacing fly wheels, crankshaft or and engine components?

  8. #7
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    Re: Horsepower mods

    crank won't help for performance. you're thinking cam.
    In an automatic, you'd do better with a stall converter, but they don't make em for 3.6L to my knowledge.
    Alot of what you're thinking would be 100% custom work... and wouldn't be worth it on a 3.6 IMO
    Argent1, Argent1, RCVW and 1 others like this.

    [2006 CTS-V - "The Vee Baby Seamus"] - 372rwhp / 361rwtq
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  9. #8
    Scattilac's Avatar
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    Re: Horsepower mods

    As others are saying, not a whole lot to do to these motors to add significant horsepower unfortunatley.

    One thing never discussed is rear end gears/ratio - When looking to make the car quicker, that was always the first enhancement we would make when I was a young motorhead (after headers) - has anyone ever thought about doing this or at least looked to see what was available? These cars run a 3.42, any chance to go to a 3.73 or 4.11 gear ratio with these rearends?

  10. #9
    odthetruth's Avatar
    odthetruth is offline Moderator
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    Re: Horsepower mods

    Quote Originally Posted by Scattilac View Post
    As others are saying, not a whole lot to do to these motors to add significant horsepower unfortunatley.

    One thing never discussed is rear end gears/ratio - When looking to make the car quicker, that was always the first enhancement we would make when I was a young motorhead (after headers) - has anyone ever thought about doing this or at least looked to see what was available? These cars run a 3.42, any chance to go to a 3.73 or 4.11 gear ratio with these rearends?
    From the way the V and my 03 looked, I'm sure little to no modding would accomodate a V's diff and axles in a CTS. I don't think it would be more of "modding" as it would be replacing CTS parts with CTS-V parts.

    V diffs are 3.73 vs the 3.42 in the CTS. If you wanted to change gearing cheaper, get a smaller tire size then stock. Thats what I did on my 03... vs changing diffs. Slightly smaller (an inch less) was like upping the gear ratio. Same effect.

    Lightweight rims help also.
    The CTS v6 is limited in its mods. Everyones talked about headers from the '11 camaro, but I'm not 100% on clearance in the CTS... since I don't think anyone has actually TRIED them.

    [2006 CTS-V - "The Vee Baby Seamus"] - 372rwhp / 361rwtq
    Pacesetters | Off Road Adapters | Cutouts | Stock Airbox | Stock Catback
    BMR AWK | CS Diff Block | Short Shifter | UMI MM | Revshift TM

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    newy0rktrini is offline Cadillac Owners Fanatic
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    Quote Originally Posted by odthetruth

    From the way the V and my 03 looked, I'm sure little to no modding would accomodate a V's diff and axles in a CTS. I don't think it would be more of "modding" as it would be replacing CTS parts with CTS-V parts.

    V diffs are 3.73 vs the 3.42 in the CTS. If you wanted to change gearing cheaper, get a smaller tire size then stock. Thats what I did on my 03... vs changing diffs. Slightly smaller (an inch less) was like upping the gear ratio. Same effect.

    Lightweight rims help also.
    The CTS v6 is limited in its mods. Everyones talked about headers from the '11 camaro, but I'm not 100% on clearance in the CTS... since I don't think anyone has actually TRIED them.
    Some what rim Sie do you recommend?

  12. #11
    CTSUK's Avatar
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    Re: Horsepower mods



  13. #12
    odthetruth's Avatar
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    Re: Horsepower mods

    Quote Originally Posted by newy0rktrini View Post
    Some what rim Sie do you recommend?
    ?
    I'd go with something in the 18" range, with an overall diameter about an inch shorter then what stock to be geared more for acceleration. I'd suggest 18s not too lose the handling feel of it. Remember, the overall tire+wheel combo has to be less then the stock wheel combo. However, any combo as long as its less then stock weight will work. Don't go too different on diameter or it may throw issues with the stabilitrac \ traction control or wheel speed sensor. An inch or so would be ok. I wouldn't go much farther then maybe an inch and a half, 2 inches.

    You will lose max speed though. It'll be a few mph slower at fuel cut off.

    You could always try to shave weight. That helps for speed also.

    What I've always seen that has improved speed in an automatic (sometimes like a full second off the quarter mile) has been a stall converter. There's none to my knowledge for that trans though.

    [2006 CTS-V - "The Vee Baby Seamus"] - 372rwhp / 361rwtq
    Pacesetters | Off Road Adapters | Cutouts | Stock Airbox | Stock Catback
    BMR AWK | CS Diff Block | Short Shifter | UMI MM | Revshift TM

  14. #13
    ghettomike's Avatar
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    Re: Horsepower mods

    Quote Originally Posted by newy0rktrini View Post
    I would like to compile a list of mods that result in HP gains with the aprox, gains annotated. I know gains cannot be truly identified without a dunno test but this is just for us guys who like to plan our next project to make our cars better.

    I have a 2006 3.6L sport

    So far I have:

    Volant air intake- up to 18hp
    RX iceolater IM spacer - up to 20hp
    Pulstar spark plug - unk

    What other mods are there to kick up HP gains?

    Ported throttle body? ...."... What else
    where are you getting these hp numbers from?

    try the WD power block.
    odthetruth and odthetruth like this.

  15. #14
    newy0rktrini is offline Cadillac Owners Fanatic
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    Quote Originally Posted by ghettomike

    where are you getting these hp numbers from?

    try the WD power block.
    From the vendors

  16. #15
    ghettomike's Avatar
    ghettomike is offline Cadillac Owners Master
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    Re: Horsepower mods

    Quote Originally Posted by newy0rktrini View Post
    From the vendors
    they lied.

    Volant air intake- up to 18hp
    RX iceolater IM spacer - up to 20hp
    Pulstar spark plug - unk

    according to this you have 38 known extra hp plus pulser spark plugs with a unknown gain.
    dont take this the wrong way...but not a chance, especially without proper tuning software to go with it.

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