• PPM-Racing (Pure Performance Motorsport) 4.2 liter S38 inline-6 stroker kit - $6900

      The BMW S38 is one of (if not arguably the best) the most impressive inline-6 cylinder motors ever produced by BMW. We will leave that debate for another article however and instead give you the details on the PPM-Racing 4.2 liter stroker kit. It includes forged pistons, H-Beam connecting rods, and a billet 4340 crankshaft. It is applicable to either 3.6 or 3.8 liter S38 motors from the BMW E28 M5 and BMW E34 BMW M5 respectively.

      The kit can be customized and accommodate naturally aspirated or boosted builds with compression ratio choices for the pistons including 8.0:1, 8.5:1, 10.0:1, 11.5:1, or 12.0:1. Piston sizes are either 94.5 or 95.0 mm. The kit is designed to use a 1x compression ring. Awesome? Yes, awesome.

      Pricing: $6900

      Included:

      - 6x forged pistons
      - Rings, pins, locks
      - 6x H-Beam connecting rods
      - ARP2000 rod bolts
      - 98mm Billet 4340 crankshaft





      This article was originally published in forum thread: PPM-Racing (Pure Performance Motorsport) 4.2 liter S38 inline-6 stroker kit - $6900 started by Sticky View original post
      Comments 60 Comments
      1. Tom S85B58's Avatar
        Tom S85B58 -
        Click here to enlarge Originally Posted by JAWS Motorsport Click here to enlarge
        Its actually the hub that walks on the crank, finally it damages the "woodruf key" that locks the hub in position, my experience are on turbocharged high tourqe engines, but i guess BMW re-designed when making the B38 of a reason? I hope PPMs stuff works good bcs its a nice upgrade to a super nice engine.

        Attachment 17721

        Maybe you should try a PPM kit with your Insane Swedish Turbo set up and report backClick here to enlarge Would be interesting to see what power is possible from a stroked S38 TurboClick here to enlarge
      1. JAWS Motorsport's Avatar
        JAWS Motorsport -
        Click here to enlarge Originally Posted by Tom S85B58 Click here to enlarge
        Maybe you should try a PPM kit with your Insane Swedish Turbo set up and report backClick here to enlarge Would be interesting to see what power is possible from a stroked S38 TurboClick here to enlarge
        Well if the block can stick togheter and dont crack as they usualy do im sure we can see 16-1800hp, we are not building anymore M30/S38s...tired of that game now Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JAWS Motorsport Click here to enlarge
        Well if the block can stick togheter and dont crack as they usualy do im sure we can see 16-1800hp, we are not building anymore M30/S38s...tired of that game now Click here to enlarge
        What motor do you mostly work on?

        If someone still wants an S38 built you still do it right?
      1. JAWS Motorsport's Avatar
        JAWS Motorsport -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        What motor do you mostly work on?

        If someone still wants an S38 built you still do it right?
        I would say most experience lies in S5Xs, well if they pay good enough yes but the knowledge and experience around here (Sweden) are wide so many customers do the entire builds them self, and not that interested to build one for the company since its like 17years ago the last M5E34 left the wheels Click here to enlarge

        700Hp S85 n/a JAWS stroker...hm..hm....or a PPM / JAWS cooperation on it maby ?
      1. Tom S85B58's Avatar
        Tom S85B58 -
        700Hp S85 n/a JAWS stroker...hm..hm....or a PPM / JAWS cooperation on it maby ?[/QUOTE]

        HMMM that would be interesting i am sure PPM would be happy to cooperate with JAWS on this S85 Project. I know for fact 720BHP was already achieved from a N/A S85 5.8L stroker! Maybe Swedish Magic can go 800+Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Tom S85B58 Click here to enlarge
        700Hp S85 n/a JAWS stroker...hm..hm....or a PPM / JAWS cooperation on it maby ?
        HMMM that would be interesting i am sure PPM would be happy to cooperate with JAWS on this S85 Project. I know for fact 720BHP was already achieved from a N/A S85 5.8L stroker! Maybe Swedish Magic can go 800+Click here to enlarge[/QUOTE]

        Who hit 720? Is there a dyno?
      1. Sorena's Avatar
        Sorena -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Who hit 720? Is there a dyno?
        Dinan did for some sort of racing team. There was no graph or something but the engine was sitting on a engine dyno and numbers are quoted from that.
      1. Tom S85B58's Avatar
        Tom S85B58 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        HMMM that would be interesting i am sure PPM would be happy to cooperate with JAWS on this S85 Project. I know for fact 720BHP was already achieved from a N/A S85 5.8L stroker! Maybe Swedish Magic can go 800+Click here to enlarge
        Who hit 720? Is there a dyno?[/QUOTE]

        It was in Germany http://www.nowack-motors.de/BMW-M-Mo...-58-708PS.html
        And the Bore and stroke was same as PPM kit Click here to enlarge Just wondering who supply the kit to them? HMMMM PPMClick here to enlarge


        but Please lets not get off topic! Back To S38 4.2l Stroker nowClick here to enlarge
      1. radasaurus's Avatar
        radasaurus -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        You are right, and the long cams pose a problem at high RPM but from what I know about the S38 it is regularly revved to 7500 with mild tunes stock without issue and has seen 8k. This is all stock internals. So is 8500 on aftermarkets all that big of an issue considering BMW made the S14 crank capable of 10000 rpm and kept it at 7000?
        I think 8500 would be, in the best case scenario, pushing your luck. It could hold up drag/highway racing, but I think on a road course you'd have issues. The Procar m88 engines revved to 9000rpm but
        they were rebuilt after every race. If I built one of these engines, I'd probably keep it under 7.5k for peace of mind. Possibly blowing a ~$10,000 engine for a few extra rpms doesn't seem worth the risk to me. Then again, maybe the available aftermarket balancer works wonders and would soak up 8500 rpm easily.

        I do not know for sure, but I think the s14's stock valvetrain is what limits its rpm potential, which is why BMW kept the red line at 7000. Upgrade the valvetrain you're good to go; the s14's crank is much shorter being a 4 cyl so it doesn't experience the same issues with vibration.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by radasaurus Click here to enlarge
        I think 8500 would be, in the best case scenario, pushing your luck. It could hold up drag/highway racing, but I think on a road course you'd have issues. The Procar m88 engines revved to 9000rpm but
        they were rebuilt after every race. If I built one of these engines, I'd probably keep it under 7.5k for peace of mind. Possibly blowing a ~$10,000 engine for a few extra rpms doesn't seem worth the risk to me. Then again, maybe the available aftermarket balancer works wonders and would soak up 8500 rpm easily.

        I do not know for sure, but I think the s14's stock valvetrain is what limits its rpm potential, which is why BMW kept the red line at 7000. Upgrade the valvetrain you're good to go; the s14's crank is much shorter being a 4 cyl so it doesn't experience the same issues with vibration.
        Ok i respect you. 8500 rpm is not 10k rpm though but the point is bmw was conservative.
      1. Sorena's Avatar
        Sorena -
        Click here to enlarge Originally Posted by Tom S85B58 Click here to enlarge
        Who hit 720? Is there a dyno?
        It was in Germany http://www.nowack-motors.de/BMW-M-Mo...-58-708PS.html
        [/QUOTE]

        I don't trust Nowack motors at all.
      1. GG///M3's Avatar
        GG///M3 -
        Click here to enlarge Originally Posted by radasaurus Click here to enlarge
        I think 8500 would be, in the best case scenario, pushing your luck. It could hold up drag/highway racing, but I think on a road course you'd have issues. The Procar m88 engines revved to 9000rpm but
        they were rebuilt after every race. If I built one of these engines, I'd probably keep it under 7.5k for peace of mind. Possibly blowing a ~$10,000 engine for a few extra rpms doesn't seem worth the risk to me. Then again, maybe the available aftermarket balancer works wonders and would soak up 8500 rpm easily.

        I do not know for sure, but I think the s14's stock valvetrain is what limits its rpm potential, which is why BMW kept the red line at 7000. Upgrade the valvetrain you're good to go; the s14's crank is much shorter being a 4 cyl so it doesn't experience the same issues with vibration.

        Correct Bmw had the s14 revs going well over 10k rpms in the e30 m3 racing hay day. I would love to own a e30 m3 turbo with a gtx3076 reving to say 8500rpms. See if it can give those evo's a run for the money. Maybe even a hta3586 with e85. Hrrmmi or or or the OP goes turbo, and keeps it a 3.6 with a gt4088-gt4094 with proper internals reving to 7800rpms. A raping powerband, and a sound that God himself would love. 4inch exhaust with a 4 inch cutout. Instant tq
      1. JAWS Motorsport's Avatar
        JAWS Motorsport -
        Click here to enlarge Originally Posted by GG///M3 Click here to enlarge
        Correct Bmw had the s14 revs going well over 10k rpms in the e30 m3 racing hay day. I would love to own a e30 m3 turbo with a gtx3076 reving to say 8500rpms. See if it can give those evo's a run for the money. Maybe even a hta3586 with e85. Hrrmmi or or or the OP goes turbo, and keeps it a 3.6 with a gt4088-gt4094 with proper internals reving to 7800rpms. A raping powerband, and a sound that God himself would love. 4inch exhaust with a 4 inch cutout. Instant tq
        My friends Joakim from Jakan Racing, i belive 8.21sec was the best time he did and 270km/h, 1100kgs on the line race ready.
        He revved close to 9k with his 2,3L S14 , 900-1000Hp..pretty nice

      1. DBFIU's Avatar
        DBFIU -
        Click here to enlarge Originally Posted by JAWS Motorsport Click here to enlarge
        My friends Joakim from Jakan Racing, i belive 8.21sec was the best time he did and 270km/h, 1100kgs on the line race ready.
        He revved close to 9k with his 2,3L S14 , 900-1000Hp..pretty nice

        http://www.youtube.com/watch?v=b9sDt-rh20c
        That car is from hell.
      1. leo985i's Avatar
        leo985i -
        Click here to enlarge Originally Posted by JAWS Motorsport Click here to enlarge
        My friends Joakim from Jakan Racing, i belive 8.21sec was the best time he did and 270km/h, 1100kgs on the line race ready.
        He revved close to 9k with his 2,3L S14 , 900-1000Hp..pretty nice
        Woah!!! That is absolutely insane.....
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JAWS Motorsport Click here to enlarge
        My friends Joakim from Jakan Racing, i belive 8.21sec was the best time he did and 270km/h, 1100kgs on the line race ready.
        He revved close to 9k with his 2,3L S14 , 900-1000Hp..pretty nice

        http://www.youtube.com/watch?v=b9sDt-rh20c
        A thousand HP from an S14?

        That car eats babies covered in Tabasco.
      1. Sorena's Avatar
        Sorena -
        What's up with the these awesome cars coming from Sweden? I think it's the air you guys have, it has some sort of drugs in it.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Sorena Click here to enlarge
        What's up with the these awesome cars coming from Sweden? I think it's the air you guys have, it has some sort of drugs in it.
        The baddest BMW's in the world all seem to be from Sweden.
      1. GG///M3's Avatar
        GG///M3 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        The baddest BMW's in the world all seem to be from Sweden.
        Yes, and they are all old school stuff mostly.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by GG///M3 Click here to enlarge
        Yes, and they are all old school stuff mostly.
        Well of course BMW's are sort of their supras.