My negative evaluation of D3 (kinda long)
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2009-2014 Cadillac CTS-V Performance Mods Discussion, My negative evaluation of D3 (kinda long) in Cadillac CTS-V Series Forum - 2009-2014; First let me tell you what they installed: 160 thermostat, intercooler, mild upgraded cam, SC lid, larger injectors,air intake, 9.5 ...
  1. #1
    qictrk's Avatar
    qictrk is offline Cadillac Owners Enthusiast
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    My negative evaluation of D3 (kinda long)

    First let me tell you what they installed: 160 thermostat, intercooler, mild upgraded cam, SC lid, larger injectors,air intake, 9.5 pulley, tune, spark plugsand wires, duel valve springs.

    When I got the car, they attached a sheet of paper showing that I made 591HP and 600TQ. I was thrilled, but after driving it only a short time, I could tell
    that the car had less power than stock. I decided to put on a larger air intake that I had, and also a catback system from Billy Boat. I started to get codes caused by running rich. D3 said that my new
    air intake was causeing all the problems, so I sent my ecm back to them and they put in a program from another car that had the same set up as me. I still got codes and thats when I decided to take it to a
    local shop, rather than ship it all the way back to D3. The local shop found that I had an injector that was getting stuck in the open position, so I had to buy
    a new set. When they finished installing the new injectors and a new tune, it was like night and day. I can really feel the power now.

    Here is the kicker. The local shop told me that they came up with 547HP and 519TQ. They said that no way could I come up with the hp and tq that D3 claimed, with my set up.
    To be fair, D3 uses Dynapack and the local shop, Dynojet. But the local shop said there should not be that big a difference, so draw your own conclusions.
    If you live in the San Jose, Ca area, I highly recommend TPS Motorsports. I get nothing out of this except I hope that people in our area will have
    a place to go without having to ship their car several hundred miles to get something that is much higher priced, and numbers that are suspect in my book. Cecil.......

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  3. #2
    thebigjimsho's Avatar
    thebigjimsho is offline Cadillac Owners 10000+ Posts
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    Re: My negative evaluation of D3 (kinda long)

    I have a 10% HB pulley and intake tube(stock box) from LPE and Kooks headers and a tune by Behe.

    557hp and 562ft/lb on a Dynapack. And it feels HELLA faster than stock...








  4. #3
    thebigjimsho's Avatar
    thebigjimsho is offline Cadillac Owners 10000+ Posts
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    Re: My negative evaluation of D3 (kinda long)

    So I guess with those mods, the V should make close to what D3 claims on the Dynapack. BUT, it should feel like a monster.

  5. #4
    JimmyH is offline Cadillac Owners 10000+ Posts
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    Re: My negative evaluation of D3 (kinda long)

    I once again remind everyone; if you have something REAL to add, or questions for the OP, or YOUR OWN experiences with subject vendor to add, please do so. If you are considering posting unneeded, unwarranted comments based on your own speculation, please find another thread to post in.

  6. #5
    serturbo is offline Cadillac Owners Fanatic
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    Re: My negative evaluation of D3 (kinda long)

    OP, did you also get a baseline number from D3? The difference is what counts.

  7. #6
    GMX322V S/C's Avatar
    GMX322V S/C is offline Cadillac Owners Connoisseur
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    Re: My negative evaluation of D3 (kinda long)

    ^^^
    Bravo serturbo. +1000

  8. #7
    qictrk's Avatar
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    Re: My negative evaluation of D3 (kinda long)

    No I didn't get a baseline. I had to ship my car to them and they are about 600 miles from here, so I relied on their figures. What really burns me is that when I got the car back for the first drive, I right away new that it was running
    way under what it did stock. It tells me that they didn't take it for a drive and may have even put in false numbers. I hope that isn't true, but its hard for me to come up with any other conclusion. I guess its always possible that as soon
    as they were through with it, the injector started sticking. Anything is possible, but why tell me the bigger intake was causeing all the problems. Another well known tuner on this forum has told me that the air intake does not effect the car running rich. Its the throttle body adjustment. Cecil..........

  9. #8
    Caddyscat is offline Cadillac Owners Fanatic
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    Re: My negative evaluation of D3 (kinda long)

    I have heard good things about TPS as well. Good to know we have a tuner in the Bay Area.

  10. #9
    Dr. Design is offline Cadillac Owners Connoisseur
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    Re: My negative evaluation of D3 (kinda long)

    Hello Cecil,

    We are sorry your experience was less than stellar. We wish this could have been resolved in a better manner. We are not quite sure what would have changed between our facility and your location to cause such a dramatic decrease in performance as you describe. Quite frankly this is the first we are hearing about the degradation in power upon immediately driving it. Had that been the case we would have loaded it right back on a transporter and figured out what was going on. It was our understanding the performance of the vehicle dropped off after you added the intake and the exhaust, thus altering the parameters of the tune. Keep in mind that we scale the MAF according to our intake. Unfortunately it might not be the same with all intakes. On the dyno and through data logs there were NO signs of hung injectors and the car pulled very hard. The car would have never left here if there was an issue like that.

    We are not interested in hearing one shops claim against another sources because nobody truly knows the actual intent. Nor are we interested in trying to compare dyno numbers from one dyno to another as the variables are already different. We spoke with your tuner several times about the combination and the conversation was much different then how the picture is being painted right now. But let's not dwell in the past. If there is an issue with your car and there is something that D3 did that needs to be addressed I will send a transporter and pick it up no questions asked. We get shipped cars from all over the country and even ship cars internationally. We take very special time and attention to details when setting up these cars as it is VERY expensive to ship cars back and forth if something was missed. I can assure you the vehicle left here at full power as it was or it would not have shipped. We would have at least liked to have been given the opportunity to make it right or see what was going on before you made alterations to the build...

    Thank you,

    Dr. Design
    D3 Cadillac




    Quote Originally Posted by qictrk View Post
    First let me tell you what they installed: 160 thermostat, intercooler, mild upgraded cam, SC lid, larger injectors,air intake, 9.5 pulley, tune, spark plugsand wires, duel valve springs.

    When I got the car, they attached a sheet of paper showing that I made 591HP and 600TQ. I was thrilled, but after driving it only a short time, I could tell
    that the car had less power than stock. I decided to put on a larger air intake that I had, and also a catback system from Billy Boat. I started to get codes caused by running rich. D3 said that my new
    air intake was causeing all the problems, so I sent my ecm back to them and they put in a program from another car that had the same set up as me. I still got codes and thats when I decided to take it to a
    local shop, rather than ship it all the way back to D3. The local shop found that I had an injector that was getting stuck in the open position, so I had to buy
    a new set. When they finished installing the new injectors and a new tune, it was like night and day. I can really feel the power now.

    Here is the kicker. The local shop told me that they came up with 547HP and 519TQ. They said that no way could I come up with the hp and tq that D3 claimed, with my set up.
    To be fair, D3 uses Dynapack and the local shop, Dynojet. But the local shop said there should not be that big a difference, so draw your own conclusions.
    If you live in the San Jose, Ca area, I highly recommend TPS Motorsports. I get nothing out of this except I hope that people in our area will have
    a place to go without having to ship their car several hundred miles to get something that is much higher priced, and numbers that are suspect in my book. Cecil.......
    MReiland, MReiland, Ketzer and 3 others like this.

  11. #10
    deckofficer is offline Cadillac Owners Fanatic
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    Re: My negative evaluation of D3 (kinda long)

    Seat of the pants is no way to evaluate performance gains or losses. I know I'm the only old school hot rodder on the forum, but even I know that sometimes you have to employ a bit of modern technology when wrenching for performance. For a mere $200, you can purchase a G-Tech and know within +/- 1% your hp and torque at any given rpm, not to mention your 0~60 times, 1/4 mile ET and trap, stopping and cornering forces. No more seat of the pants guys, pick up a G-Tech, I've used them (along with all the major automotive magazines) for the last ten years. BTW, my V is slow in comparision to my other rides.

  12. #11
    serturbo is offline Cadillac Owners Fanatic
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    Re: My negative evaluation of D3 (kinda long)

    Having owned both a GTech and Vbox, I'd pay the extra cash for a Vbox. It's a much better unit and isn't thrown off by sudden jolts caused by wheel hop, hard shifts, etc.

  13. #12
    deckofficer is offline Cadillac Owners Fanatic
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    Re: My negative evaluation of D3 (kinda long)

    Quote Originally Posted by serturbo View Post
    Having owned both a GTech and Vbox, I'd pay the extra cash for a Vbox. It's a much better unit and isn't thrown off by sudden jolts caused by wheel hop, hard shifts, etc.
    Either way, get something that will establish baselines and improvements. If you can feel via seat of the pants a 10 hp increase/decrease in a 4250 lb car, your better than me.

  14. #13
    serturbo is offline Cadillac Owners Fanatic
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    Re: My negative evaluation of D3 (kinda long)

    Quote Originally Posted by deckofficer View Post
    If you can feel via seat of the pants a 10 hp increase/decrease in a 4250 lb car, your better than me.
    That would be a finely tuned butt.

  15. #14
    cdog533's Avatar
    cdog533 is offline Cadillac Owners Enthusiast
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    Re: My negative evaluation of D3 (kinda long)

    To the OP, it's tough to figure out true HP from 2 different dynos. They are all very different. Perhaps run the car at the track and compare new ET's to old ET's. Or ship it back to D3 for a new dyno run on the original dyno. They can also fix any issues in the tune.

  16. #15
    The Tony Show's Avatar
    The Tony Show is offline See you in the funny papers
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    Re: My negative evaluation of D3 (kinda long)

    Moved from General Discussion to Performance section.
    Rest in Peace, J.D. (aka Dirt_Cheap_Fleetwood)

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