M50B25 stroker kit

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  1. M50B25 stroker kit 
    #1
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    hi guys, i was planning to swap my engine this summer, for a S50 engine. but now, i'm thinking that maybe a stroker kit would be great also. although this means more work and probably less bhp, the idea still attracts me, especially if I plan to compete with this car, keeping the OEM engine will put me in a whole lot easier class of opponents (166-200bhp), and with great chances of winning. so i was wondering if any of you did this mod on the car. I've been looking around but couldn't find a similar thread, and most of the threads on similar forums are abandoned, closed etc. from what I've read, I'll need the S50B30 crank, M50B25 non-vanos rods and pistons from a M54B30 (they are shorter, presumably). what do you say? what else would I need, what do I need to have in mind before starting this (if ever, I haven't really made up my mind yet)?

    cheers,
    gabriel
    There are only two products required to make the universe work properly: Duct tape and WD40. 


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    Just had a bit of look for you. Looks like you can use the 330 pistons, rods and crank. With custom pistons and a bore you can get upto 3.2.

    You will also need to think about what you are going to do engine management wise.

    It really depends on how much work you are able to do yourself to determine if it is worth it or not.

    I would give buying an M3 serious thought, it will already have loads of other uprated parts. Changing the diff, exhaust, brakes etc will not be cheap.

    Saying that a 3 litre M50 would be a thing of great beauty!
     
     

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    The problem is that I haven't really heard anyone saying "YAY! I did it!".. everywhere I look, only abandoned projects. I'll keep an eye for them, tho'.. I'll probably go for a the S50 swap. I'd love a stroker on this M50, this engine is pretty much bullet-proof, and competing wise, it would bring me great satisfaction, I'm sure of it. But then again, I think I'll just go for the easy way with the S50.

    Thanks anyway, Ian!
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    I think I know someone who has done it. I'll have a look later and PM you.

    Ian
     
     

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    Quote Originally Posted by Ian S View Post
    I think I know someone who has done it. I'll have a look later and PM you.

    Ian
    Thanks mate, I appreciate it!
    There are only two products required to make the universe work properly: Duct tape and WD40. 


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    Everything else is just stuff.
     
     

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    defo a thread worth reading.. seems like a hell lot of work, but kinda disappointed to see he finally decided to sell it, after he managed to have it all sorted out. anyway, seems like a similar project would require too much work and money. I think I'll go for the S50 swap, it's a lot easier.
    There are only two products required to make the universe work properly: Duct tape and WD40. 


    If it moves (and it shouldn't): duct tape. 
If it doesn’t move (and it should): WD40.

    Everything else is just stuff.
     
     

  10. Still on course with my stroker project. 
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    Hey Mate.

    I'm still on course with my stroker project. Just received my forged rods and and ceramic head gasket. But this is taking more time than i first thought , not only making sure i have all the right bits but finding out as much as poosible. I've only found one person who has completed it to the end (DJC, on e36 coupe.com ) , he also fitted a supercharger. The project had trouble with the fueling and ended up dead. I think with combination of stroke and supercharger it became to difficult to get right for most mortals anyway.
    So be prepared for restless ngts. It got so bad at one point i found it hard to sleep. LoL. There is alot to learn if you take on this project on. You'll need to understand about AFR (Air Fuel Ratios) , wideband o2 sensors to ensure you are getting the right afr. Engine tolerances and engine building the list is endless.
    If you end up ripping your hair out trying to get the right info (alot people have the wrong info and some have superior knowledge ,it deciphering what sh@t and what isn't. ) you could always go down the same road as me and get someone else to build it for you. Again this comes at a cost, a BIG f@@king cost. Wish i just did an M3 swap .
    So see how you feel in a couple of weeks weigh it all up. I did it arse about face a little by just buying so much for the project that i couldn't go bk. . If you decide to continue just let me know and i'll try and poit you in the right direction.

    Cheers Donut................
     
     

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    There are options on the mapping. You could try a piggyback ECU. The standalone ECU's I have used have had an autotune option to get a base map and you can then tweak from there. It's probably best to have a play on the old engine before you stick in the new one!

    Engine building can be a right mare. I know my brother had to pull his engine out twice due to his engine builder messing up.

    Personally, I'd go the same route as Mr D above and get someone else to build and map it!

    Ian
     
     

  13.  
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    at this point, after a lot of reading, i think i'll stick to the original plan - meaning the M3 swap. stroking seems to be a lil bit too much of a headache with a lot of spending money. but thanks for the offer, i might end up taking advantage of it, if i change my mind and go for the stroker. as i said, i still have plenty of time to think about options, the swap/stroke think will happen no sooner than summer. again, thanks a lot, mate!
    There are only two products required to make the universe work properly: Duct tape and WD40. 


    If it moves (and it shouldn't): duct tape. 
If it doesn’t move (and it should): WD40.

    Everything else is just stuff.
     
     

  14.  
    #10
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    Quote Originally Posted by DonutMan1 View Post
    Hey Mate.

    I'm still on course with my stroker project. Just received my forged rods and and ceramic head gasket. But this is taking more time than i first thought , not only making sure i have all the right bits but finding out as much as poosible. I've only found one person who has completed it to the end (DJC, on e36 coupe.com ) , he also fitted a supercharger. The project had trouble with the fueling and ended up dead. I think with combination of stroke and supercharger it became to difficult to get right for most mortals anyway.
    So be prepared for restless ngts. It got so bad at one point i found it hard to sleep. LoL. There is alot to learn if you take on this project on. You'll need to understand about AFR (Air Fuel Ratios) , wideband o2 sensors to ensure you are getting the right afr. Engine tolerances and engine building the list is endless.
    If you end up ripping your hair out trying to get the right info (alot people have the wrong info and some have superior knowledge ,it deciphering what sh@t and what isn't. ) you could always go down the same road as me and get someone else to build it for you. Again this comes at a cost, a BIG f@@king cost. Wish i just did an M3 swap .
    So see how you feel in a couple of weeks weigh it all up. I did it arse about face a little by just buying so much for the project that i couldn't go bk. . If you decide to continue just let me know and i'll try and poit you in the right direction.

    Cheers Donut................
    any news so far, mate? i'm fiddling again with the idea of stroking, lol. as difficult as it is, it still appeals very much. M50B30 sounds really good to me! maybe i could find the inspiration in your project and finally get mine started. looking forward to hearing the news on your project, mate!
    There are only two products required to make the universe work properly: Duct tape and WD40. 


    If it moves (and it shouldn't): duct tape. 
If it doesn’t move (and it should): WD40.

    Everything else is just stuff.
     
     

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