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Cockroach Individual M3 6/28/2026 x5 or m3? PWR 55mm Rad

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    M3 has been used for house stuff,
    Untitled by Sam DaJam, on Flickr
    Untitled by Sam DaJam, on Flickr

    Can transport of 10ft PVC pipe
    Untitled by Sam DaJam, on Flickr

    Can move tables
    Untitled by Sam DaJam, on Flickr
    Untitled by Sam DaJam, on Flickr

    But we finally got the house moved in sort've. So I wanted to start using the shop and buying tools so I can do stop doing things out of a toll roll bag or borrowing a shop.

    I fixed the horn button, that got messed up fiddling with steering wheel hub at Road Atlanta. Checked the freon.
    Untitled by Sam DaJam, on Flickr


    And the project I was very excited on,
    Untitled by Sam DaJam, on Flickr

    I found one of these guys:


    Untitled by Sam DaJam, on Flickr

    Old Forum copy and pasta said it fit with the stock fan clutch so we gave it ago.

    PWR 5966

    + 25% additional cooling capacity
    + all aluminum construction - no plastic!
    + direct bolt-in alternative, even with factory fan shroud, fan, A/C condenser, oil cooler, and even supercharger kits and accessories*
    + proven under intense endurance racing conditions

    $1,029 NEW.

    The PWR all aluminum radiator is known throughout the world for its superior cooling capabilities. PWR products and technology are used in a multitude of racing classes ranging from F1, BTCC, WRC, Grand-Am, SCCA, Australian V8 Supercars, and NASCAR. Turner Motorsport uses PWR components in our E46 M3, E92 M3, and M3 GT racecars. PWR’s cutting edge design utilizes aircraft-grade aluminum and an oven brazed bonding technology to assure trouble free and reliable cooling even in the harshest conditions. Other radiators use a standard epoxy-seal assembly which can eventually become fatigued and crack due to constant heat cycling and vibration. The PWR radiators used in our own racecars offer an additional 25% cooling capacity, direct bolt-on fitment for E46 M3 (no modifications required to front core support) and precision-machined and TIG-welded end tanks. Each radiator is pressure-tested during manufacturing. We have used this radiator with several E46 M3 builds in our shop, including using the Turner oil cooler kit and AA/HKS Stage 2 supercharger packages (intercooler + s/c oil cooler). Professional installation under these circumstances is strongly advised to ensure the correct fitment and routing of these components. The PWR radiator for the E46 M3 proved to be a vital component to the TMS Racing effort and can easily carry over to your race car or street car for years of reliability.


    This is a giant 55mm single pass radiator. I had 4 to compare too total. Bimmerworld C&R, Koyo, 2016 Date code Modine E46 M3 and this PWR. The C&R while looking the most complex, highest fin density and being a triple pass wasn't something I want to try yet as triple passes don't seem to work well at low air speeds. I still put many many street mile on this so the PWR was what I was after.

    Here are my measurements of core volume, which is a very crude way to compare. However the fin count, and tube counts didn't look very different. C&R was only one that really too out.
    Click image for larger version  Name:	image.png Views:	0 Size:	81.1 KB ID:	359830

    I also had a CSF E36 M3 rad to compare to out of a s54 swapped car for shits n giggles.

    Anyways this PWR is no joke, and it was a very very tight squeeze but it fit. I have some Morehead mounts I'll install for the engine. As well as some crude zipties to make sure the rad doesn't get closer to the fan at all.

    The aftermarket upper rad hose started leaking so I bought OE top hose and a new expansion tank. I had a used one to use in interim to wait for the Genuine BMW stuff.
    Untitled by Sam DaJam, on Flickr


    That came in:
    Untitled by Sam DaJam, on Flickr

    Highway was 176F with OBC saying that ambient and A/C on. A/C off is like 171-172.
    Untitled by Sam DaJam, on Flickr


    Stopped traffic it was sitting at 194. Very happy with that. Now this doesn't say fuck all about if it will fix my car running hotter than I'd like in 85F + at Road Atlanta, but definitely running cooler on the street than before. Why I put in the bigger rad

    Untitled by Sam DaJam, on Flickr
    Untitled by Sam DaJam, on Flickr

    Bluebus and header update next
    Untitled by Sam DaJam, on Flickr
    Last edited by samthejam; Yesterday, 09:29 PM.
    Build Thread:
    https://nam3forum.com/forums/forum/m...-new-pb-at-msr

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      Originally posted by samthejam View Post
      M3 has been used for house stuff,
      Can transport of 10ft PVC pipe
      Can move tables
      Honestly, my friends would joke that the E46 is always *just* big enough for whatever it is that you want to transport hahaha
      2005 ///M3 SMG Coupe Silbergrau Metallic/CSL bucket seats/CSL airbox/CSL console/6 point RACP brace/Apex ARC-8s
      Build Thread | Community Patch | MSS54 DS2 Tool

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