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    • Horsepower Freaks (HPF) Stage 4 E46 M3 S54 turbo puts down 925 whp

      First of, congratulations. Closing in on 1k hp at the wheels with an HPF Stage 4 setup is no small feat. Horsepowerfreaks has been advertising this as 970 whp which is what the car did put down uncorrected. The SAE corrected numbers are 925 whp and what we will go with. This car belongs to someone named Jason and it is a very, very impressive car.


      Uncorrected:


      Video:

      This article was originally published in forum thread: Horsepower Freaks (HPF) Stage 3 E46 M3 S54 turbo puts down 925 whp started by Sticky View original post
      Comments 113 Comments
      1. TaZaM3's Avatar
        TaZaM3 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        This... is intriguing.
        Yup, If i go ahead and do this I can make a healthy 1100whp..
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by TaZaM3 Click here to enlarge
        Yup, If i go ahead and do this I can make a healthy 1100whp..
        Well why wouldn't you? And would you please make this BB exclusive? I want people coming here first damn it.
      1. TaZaM3's Avatar
        TaZaM3 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Well why wouldn't you? And would you please make this BB exclusive? I want people coming here first damn it.
        More money, time etc... I'm not into it like I used to be...
      1. GG///M3's Avatar
        GG///M3 -
        Click here to enlarge Originally Posted by TaZaM3 Click here to enlarge
        More money, time etc... I'm not into it like I used to be...
        I think this way of thinking is catching on.
      1. BattaM3's Avatar
        BattaM3 -
        Agreed with that GG.
      1. fastgti69's Avatar
        fastgti69 -
        Click here to enlarge Originally Posted by TaZaM3 Click here to enlarge
        More money, time etc... I'm not into it like I used to be...
        You can do ITTTTTT
      1. gringotegra's Avatar
        gringotegra -
        Click here to enlarge Originally Posted by TaZaM3 Click here to enlarge
        Precision 76mm... Im entertaining an offer that will rebuild my turbo and will add 150hp addition to its max rating.
        Going from a Cast wheel to a Billet wheel right?
      1. Yukohama's Avatar
        Yukohama -
        that'd be one fast car taz
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by TaZaM3 Click here to enlarge
        More money, time etc... I'm not into it like I used to be...
        I can understand this.
      1. TaZaM3's Avatar
        TaZaM3 -
        Click here to enlarge Originally Posted by gringotegra Click here to enlarge
        Going from a Cast wheel to a Billet wheel right?
        Larger wheel, and most likely Billet.
      1. gringotegra's Avatar
        gringotegra -
        Click here to enlarge Originally Posted by PEI330Ci Click here to enlarge
        I disagree, and I'm surprised that you would say that.

        It has over 600rwtq from 5500 to 8000 RPM, which is a pretty fat torque band. Match the gear ratios up, and you'll see that the shift points fall within this powerband for every gear. The only tough thing would be launching, but I think that's more an issue of driver skill than anything else. (Most people have no idea how to slip a clutch, I know you know what I mean)

        That said, I have known for a long time that the "bottleneck" of the HPF systems is the flow rate of the Meth system. If they could increase the meth delivery, we'd see more power above 7000 RPM in everything from Stage 2 to Stage 4 kits. The only way I can see them doing this is by adding a second Meth stage. (The pump is pretty much maxed out with what they are doing now) On race cars, I've seen an average of 13% difference in HP between race fuel and Meth....the power is in the fuel.

        Edit: The HPF kits are also probably at the limit of what a single point of meth injection can safely deliver evenly cylinder to cylinder. I think the best path of delivery for serious power would be a second fuel rail for meth and injectors mounted at the top of each runner. That's a pretty expensive project though, as the existing ECU I dont think can handle staged injection and 12 injectors. So...direct port Meth would be the more practical way to deliver the meth evenly between cylinders. Might take 2 three cylinder systems to deliver the volume for a Stage 4 car though....

        I think I may scare HPF guys a little bit with my posts...they rarely respond to any of my comments. LOL I totally respect what they are doing though.
        I never saw your response to what i said...

        I think the powerband sucks because the cars only rev to 8000...give them another 500rpm or more and youd have more to work with... its just such a fast steep increase in power... From what ive found out to be fast you need a 3k rpm power band... i calculated the shift points on an M3 i will see if i can find them again, that will show where the car will fall at every shift it the driver of the car can ninja shift Click here to enlarge....




        I think what you say to some of the HPF guys goes right over their head Click here to enlarge thats why they never respond...
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by gringotegra Click here to enlarge
        I think the powerband sucks because the cars only rev to 8000...give them another 500rpm or more and youd have more to work with...
        The S54 already has very high piston speeds due to its long stroke. I'm impressed they rev as high as they do to begin with.
      1. 1cleanAMG's Avatar
        1cleanAMG -
        When are we going to see one of these cars do a successful 1/4 run...
      1. gringotegra's Avatar
        gringotegra -
        Ok here is the gear calculation.... i took the stock tire size 255/35/19 since that was all i had to go with..

        http://www.teammfactory.com/gearcalc...&trannytype=27

        So lets check it out..

        1st -> 2nd shift point 4729
        2nd -> 3rd shift point 5306
        3rd -> 4th shift point 5920
        4th -> 5th Shift point 6495
        5th -> 6th shift point 6632


        This was just a close rough guess on the RPM's in the graph but:

        Click here to enlarge

        the 1->2 shift will be $#@!ty and will most likely bog, 2->3 will be kind of the same but it falls a bit higher in the power band...3->4 is much better and it gets better after that.....

        So IMO the gearing + power band for the 76mm on these cars isnt ideal... if they could rev it higher say to 8500-9000 it would help out alot..

        But im no expert...
      1. BattaM3's Avatar
        BattaM3 -
        Or if your a hpf owner like me. I don't give a $#@! what someone says on a forum
      1. BattaM3's Avatar
        BattaM3 -
        There has been successful 1/4 mile runs but no 10s.
      1. Sticky's Avatar
        Sticky -
        The other factor for E46 M3 10 second runs is the SMG. The manual is the way to go for the strip, the SMG is a headache to launch.
      1. lughed's Avatar
        lughed -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        The S38 is a whole different league, way more expensive to maintain but actually arguably a better turbo platform. More displacement, easier tuning, more options, etc.

        The problem with the S54 is there is only one option, HPF. Nothing against them, it just hurts us as costs stay up and we don't see the competition we do in the S50 sector.

        You ever post details on your S38?
        Is the s54 really cheaper than the s38?

        Nothing major about my s38. Its an original motor from my e28 m5, cat back exhaust, evo cam gear, cold air intake and chipped. I built headers but took them off because they seemed to choke the top end a little when paired with the cam gear so stock headers are on now. Never been dynoed but i waxed an old friends so called "fully built" e28 535i with 3.92 gears and m3 trans who claimed to "do circles around m5's and cruise at 185 mph"...lmao. After i wiped the street with him he decided to go turbo but never brought the car out again.
      1. BattaM3's Avatar
        BattaM3 -
        Trust me I know SMG are a b1tch to launch! I have not perfected it. Either I do it perfect or spin outta control. No middle ground. Lol. Some say don't use LC and just mash the pedal. When I did that the car seemed to have a second delay the go.

        I haven't really tried it much.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by lughed Click here to enlarge
        Is the s54 really cheaper than the s38?
        I would say so. Many more S54's around with many more parts available.

        Working in the S38's favor is you can find them in several cars that are not worth much today.

        Click here to enlarge Originally Posted by lughed Click here to enlarge
        Nothing major about my s38. Its an original motor from my e28 m5, cat back exhaust, evo cam gear, cold air intake and chipped. I built headers but took them off because they seemed to choke the top end a little when paired with the cam gear so stock headers are on now. Never been dynoed but i waxed an old friends so called "fully built" e28 535i with 3.92 gears and m3 trans who claimed to "do circles around m5's and cruise at 185 mph"...lmao. After i wiped the street with him he decided to go turbo but never brought the car out again.
        Cruised at 185 huh? Glad you taught him some respect.

        I understand nothing major is done to your S38, but I would still like to see it. Maybe make a thread in the 5 series section?