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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. lughed's Avatar
        lughed -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        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.



        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?
        I'll post some pics in the pics thread in the 5 section.
      1. ccsykes's Avatar
        ccsykes -
        Click here to enlarge Originally Posted by FR305 Click here to enlarge
        When are we going to see one of these cars do a successful 1/4 run...
        Honestly I think the biggest reason is most are worried about breaking something. The M3 isn't exactly the cheapest car to fix.
      1. spdu4ea's Avatar
        spdu4ea -
        Click here to enlarge Originally Posted by gringotegra Click here to enlarge
        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:

        http://www.bimmerboost.com/images/im...ftpoints-1.jpg

        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...
        Keep in mind it'll spool at least 500rpm sooner on the street with a 3700lb car than it does spinning a 2000lb roller... I still agree with you that the next step should be to rev to 9500+ like Supras -- people claim piston speeds are already maxed, but a 3.4L 2JZ has a longer stroke and can survive 10,000 rpm down the mile...
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by spdu4ea Click here to enlarge
        Keep in mind it'll spool at least 500rpm sooner on the street with a 3700lb car than it does spinning a 2000lb roller... I still agree with you that the next step should be to rev to 9500+ like Supras -- people claim piston speeds are already maxed, but a 3.4L 2JZ has a longer stroke and can survive 10,000 rpm down the mile...
        I would like to see it revved out as well but I hope it has some stout internals for the job. Also, camwork is going to be needed at that point, probably the heads as well.
      1. gringotegra's Avatar
        gringotegra -
        Click here to enlarge Originally Posted by spdu4ea Click here to enlarge
        Keep in mind it'll spool at least 500rpm sooner on the street with a 3700lb car than it does spinning a 2000lb roller... I still agree with you that the next step should be to rev to 9500+ like Supras -- people claim piston speeds are already maxed, but a 3.4L 2JZ has a longer stroke and can survive 10,000 rpm down the mile...
        Yeah i did take that in mind, i was just trying to show what it would be like given the gear ratios and the dyno.....

        I know that with my car 300rpm gave me 2-3mph more trap.... revving it to 9800 instead of 9500 didnt seem like it would do much but it did...
      1. gringotegra's Avatar
        gringotegra -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I would like to see it revved out as well but I hope it has some stout internals for the job. Also, camwork is going to be needed at that point, probably the heads as well.
        The motor's are built well enough i think.... only think i can think of that might need upgrading are the valve springs.... from what my friend said that works at HPF, the heads flow great....not many cars come with CNC'ed heads from the factory...

        Honda heads dont need head work to make power.... a BMW head is alot nicer than a cast alum honda head...
      1. gringotegra's Avatar
        gringotegra -
        Click here to enlarge Originally Posted by ccsykes Click here to enlarge
        Honestly I think the biggest reason is most are worried about breaking something. The M3 isn't exactly the cheapest car to fix.
        Yes i agree... but, how could one not afford to fix a couple broken parts if they just spent $15-40K+ on a turbo kit?? not being a dick just sayin
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by gringotegra Click here to enlarge
        The motor's are built well enough i think.... only think i can think of that might need upgrading are the valve springs.... from what my friend said that works at HPF, the heads flow great....not many cars come with CNC'ed heads from the factory...

        Honda heads dont need head work to make power.... a BMW head is alot nicer than a cast alum honda head...
        Wouldn't all the modern cars heads be CNC'd? It just means a computer is feeding a machine a design. That is how all of them would be done but not to the level the S54 heads are.

        I doubt the head will be the bottle neck for the reasons you stated, incredible head. The valvetrain and cams would need to be addressed though, the heads ability to flow would be last on the list.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by gringotegra Click here to enlarge
        Yes i agree... but, how could one not afford to fix a couple broken parts if they just spent $15-40K+ on a turbo kit?? not being a dick just sayin
        You reach a point where you just are sick of shelling out cash.
      1. gringotegra's Avatar
        gringotegra -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Wouldn't all the modern cars heads be CNC'd? It just means a computer is feeding a machine a design. That is how all of them would be done but not to the level the S54 heads are.

        I doubt the head will be the bottle neck for the reasons you stated, incredible head. The valvetrain and cams would need to be addressed though, the heads ability to flow would be last on the list.
        Not sure if all modern heads are CNC'd... i know my head is Cast, and does not need to be touched for it to make 850whp.. obviously it needs valve springs, some OEM cams will get you to that power level also.. my friend made 865whp on a stock GSR head/cams with valve springs with a BW s372...

        My guess would be the valve springs need attention for sure.. cam's i am not sure about, they seem to be doing ok right now, but would be nice to get some custom cams to carry the power out a bit longer....
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by gringotegra Click here to enlarge
        cam's i am not sure about, they seem to be doing ok right now, but would be nice to get some custom cams to carry the power out a bit longer....
        Exactly, if doing it might as well maximize it.
      1. gringotegra's Avatar
        gringotegra -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Exactly, if doing it might as well maximize it.
        Thats where the more $$$ comes in...

        i am curious to see how CCSKYES car comes out, it has a pretty nice head setup so that may show some good or not some good things...

        I say not so good things because i have seen Custom ported CNC'd heads do worse than stock heads on a few different cars from a few different companies... the head work does wonders on a N/A car, but does not yield as much as one would think for a FI car...
      1. PEI330Ci's Avatar
        PEI330Ci -
        Click here to enlarge Originally Posted by gringotegra Click here to enlarge
        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:

        http://www.bimmerboost.com/images/im...ftpoints-1.jpg

        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...
        Really good post.

        I think the last time I looked at the gear ratios was for another stage, because that stage 4 powerband definitely could use another 500-1000 RPM on the drag strip.

        To get that extra RPM, I think will be expensive to do it right. Cams, springs, finger followers, more tuning time. Porting the head moves you from about 270 cfm on the intake for example, to about 290 cfm with a really well contours port. I wouldn't say porting is what's needed for that extra RPM, but it will help.

        Funny thing is, the M3 tranny doesn't really shift that well, so the gear ratios won't really matter on a true drag car. Anyone that's driven a Liberty, Gforce, or Jerico knows what I'm talking about.....and knows that a 1000+hp car is going to need thatl sooner rather than later.
      1. PEI330Ci's Avatar
        PEI330Ci -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        You reach a point where you just are sick of shelling out cash.
        In the racing game, $40k disapears pretty fast.

        Once you start traveling to hit tracks, or events, other costs dwarf the race car specific costs.

        I've certainly been in that frame of mind where I've been fatigued by spending money with very little return though....

        I remember a great line from a magazine writer years ago when he basically quit the racing scene. He said he was still paying credit cards for a blown engine....and not the last one that was in the car. Sometimes you've got to take a breather to let life catch back up to you.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by PEI330Ci Click here to enlarge
        I remember a great line from a magazine writer years ago when he basically quit the racing scene. He said he was still paying credit cards for a blown engine....and not the last one that was in the car. Sometimes you've got to take a breather to let life catch back up to you.
        Very true but I think it is a lot easier to get sick of these BMW platforms vs. others. They are much more difficult to extract power from with far less people willing to pay to play. Smaller aftermarket, smaller base, and smaller/finicky motors that are tough to mod.
      1. ccsykes's Avatar
        ccsykes -
        Click here to enlarge Originally Posted by gringotegra Click here to enlarge
        Yes i agree... but, how could one not afford to fix a couple broken parts if they just spent $15-40K+ on a turbo kit?? not being a dick just sayin
        I can't speak for others.. but I have no problem breaking something lol.. I intend to try my hardest!
      1. ccsykes's Avatar
        ccsykes -
        Click here to enlarge Originally Posted by gringotegra Click here to enlarge
        I say not so good things because i have seen Custom ported CNC'd heads do worse than stock heads on a few different cars from a few different companies... the head work does wonders on a N/A car, but does not yield as much as one would think for a FI car...
        I didn't have any port work done. The only "flow" modification was a decent valve job and unshrouding the valves. I didn't see the point of hogging the head out when running 20+ PSI of boost. The only thing my heads have different than OEM is a lighter (1 piece valve) that has been nitrated, more stronger valve train (balanced dual springs/steel retainers).

        I don't expect to gain any additional power from my heads, however they should be more reliable. The springs are rated to 10,000 RPM, and being dual I won't have to worry about a dropped valve. The valve train would also be far more forgiving in a "money shift" situation.

        Bottom line.. I didn't see the point in putting a set of OEM heads with 95,000 miles on a brand new built short block.. it just seemed dumb.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by ccsykes Click here to enlarge
        I don't expect to gain any additional power from my heads, however they should be more reliable. The springs are rated to 10,000 RPM, and being dual I won't have to worry about a dropped valve. The valve train would also be far more forgiving in a "money shift" situation.
        Why do dual springs mean no chance for a dropped valve?
      1. PEI330Ci's Avatar
        PEI330Ci -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Why do dual springs mean no chance for a dropped valve?
        Not because they are dual, but because they have better valve control, the dual springs reduce valve fatigue.

        I think I've written a pretty detailed description of valve spring dynamics in another thread here?
      1. gringotegra's Avatar
        gringotegra -
        Click here to enlarge Originally Posted by PEI330Ci Click here to enlarge
        Really good post.

        I think the last time I looked at the gear ratios was for another stage, because that stage 4 powerband definitely could use another 500-1000 RPM on the drag strip.

        To get that extra RPM, I think will be expensive to do it right. Cams, springs, finger followers, more tuning time. Porting the head moves you from about 270 cfm on the intake for example, to about 290 cfm with a really well contours port. I wouldn't say porting is what's needed for that extra RPM, but it will help.

        Funny thing is, the M3 tranny doesn't really shift that well, so the gear ratios won't really matter on a true drag car. Anyone that's driven a Liberty, Gforce, or Jerico knows what I'm talking about.....and knows that a 1000+hp car is going to need thatl sooner rather than later.
        Yeah, a stage 4 needs more rpm... maybe later on today if im bored at home i will see if i can do another one of those graphs vs a stage 2.5/3...i think the 67mm might have the best over all power band for a 8000rpm rev limiter...

        And yeah for a full out drag car, might as well go with a dog box!! ive driven a few dog box cars and yah they work great! the dog engagement is just pure win.... But bring the $$$$$!! From what i was told, the E46 tranny's are not that strong either... as soon as someone puts power down at a track, they just might break....