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    • VF-Engineering VF650 supercharged E92 M3 versus a Hennessey tuned Cadillac CTS-V

      This video comparison comes to us from Brazil courtesy of Full Power Magazine. These two cars grace the cover of their August issue. The M3 has a VF650 supercharger kit and we have seen the weaker VF620 put down 521 wheel horsepower on 91 octane. The exact modifications on the CTS-V are not given but it is stated to have around 650 horsepower as well with Hennessey upgrades so likely just a tune, pulley, and exhaust upgrade.

      The numbers in the video are given in CV (cheval vapeur) units which is a French unit of power measure that closely correlate with horsepower units. 1 CV is .986 horsepower. On paper according to the magazine the cars have similar horsepower. In practice, the M3 dusts the CTS-V rather easily. Kind of surprising to see the M3 pull this hard on a tuned CTS-V which is why we would like to have the exact specs the Caddy.

      We also do not know which transmission the M3 has but we assume the dual clutch trans.





      This article was originally published in forum thread: VF-Engineering VF620 supercharged E92 M3 versus a Hennessey tuned Cadillac CTS-V started by Sticky View original post
      Comments 52 Comments
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by ultimateendz Click here to enlarge
        same power less heat you mean
        No I meant more power, less heat, less boost. You are essentially increasing the efficiency. Just because you drop boost doesn't mean you are making less power.
      1. Sonny's Avatar
        Sonny -
        Click here to enlarge Originally Posted by ultimateendz Click here to enlarge
        they actually drop the boost in the V and i bet didnt upgrade the pulley to compensate...a V with headers and the right pulley can do 125-126 all day
        I had a fifth gen camaro with a KB, making about 7.5 psi. When I installed 1 7/8" LT's boost only dropped .5 psi.

        Just sharing my experience.
      1. Sonny's Avatar
        Sonny -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Dropping the boost just lowers the backpressure the car should breathe more freely and make more power.
        This was my experience. Once the LT's went on, the rear tires broke loose much easier.

        The sound was G-d aweful, but that's another story.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Sonny Click here to enlarge
        This was my experience. Once the LT's went on, the rear tires broke loose much easier.

        The sound was G-d aweful, but that's another story.
        I think the problem is a lot of people equate boost to horsepower. I kind of looked at it that way as well a while ago. The thing is, you can make more power at less boost if you improve the efficiency. The pulley is the same, the blower is still spinning the same, it just is breathing easier.

        The goal should be to make as much power as possible at the least amount of boost possible. This is why M motors are a good forced induction platform due to their high efficiency to begin with.
      1. Sticky's Avatar
        Sticky -
        Wonder if the site is read by more people than I think it is. People are starting to use me as a source: http://www.autospies.com/news/CAR-WA...COMFORT-72158/
      1. ultimateendz's Avatar
        ultimateendz -
        Click here to enlarge Originally Posted by Sonny Click here to enlarge
        I had a fifth gen camaro with a KB, making about 7.5 psi. When I installed 1 7/8" LT's boost only dropped .5 psi.

        Just sharing my experience.
        ours drop 1 full psi...some 1.5
      1. Sonny's Avatar
        Sonny -
        Click here to enlarge Originally Posted by ultimateendz Click here to enlarge
        ours drop 1 full psi...some 1.5
        Interesting. What size blowers? 1.9's or larger aftermarket ones?
      1. ultimateendz's Avatar
        ultimateendz -
        1.9s
      1. Sonny's Avatar
        Sonny -
        Click here to enlarge Originally Posted by ultimateendz Click here to enlarge
        1.9s
        I see.
      1. Sonny's Avatar
        Sonny -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Wonder if the site is read by more people than I think it is. People are starting to use me as a source: http://www.autospies.com/news/CAR-WA...COMFORT-72158/
        At least they linked to your site. But if they're gonna use your content they should mention your site at the top of their piece.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Sonny Click here to enlarge
        At least they linked to your site. But if they're gonna use your content they should mention your site at the top of their piece.
        I'm just happy to get the link. A lot of people use it without giving me credit Click here to enlarge
      1. Sonny's Avatar
        Sonny -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I'm just happy to get the link. A lot of people use it without giving me credit Click here to enlarge
        I know what you mean. I've written stuff online before and I find it posted and commented on in the most random places. One time I wrote a piece on "stand-up" martial arts training. And it eventually got posted on some foreign website and the comments were arguing over the meaning of "stand-up" ( like boxing/kickboxing). It was funny.