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Thread: M60 dudebros: Underdrive pulleys (VAC discontinued)

  1. #51
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    Haha, thanks - just happy to help!

  2. #52
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    Quote Originally Posted by eddycooper View Post
    For the water pump, there is a non-USA pulley that's 117mm instead of 104mm diameter. It's part number 11511733429. Not sure how big the VAC item is, but if it's similar then this might be a way to save some money on the set.

    For plastics - the OEM pulleys usually show the grade right on them. It's probably glass-filled nylon.
    If so it usually is 'pa66 + gf30' or 'pa6 + gf30' something along those lines. Anyone with an M60 and some effort could tell us what the stock pulley is made from the issue is replicating the production. The tooling for the molds alone would cost way more than making some aluminum pulleys

  3. #53
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    Quote Originally Posted by eddycooper View Post
    Haha, thanks - just happy to help!


    Quote Originally Posted by Billyj View Post
    If so it usually is 'pa66 + gf30' or 'pa6 + gf30' something along those lines. Anyone with an M60 and some effort could tell us what the stock pulley is made from the issue is replicating the production. The tooling for the molds alone would cost way more than making some aluminum pulleys
    Your last note was what really scared Greg off I think, and we are shooting for affordability (even cheaper than VACs) as well as functionality.

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    Quote Originally Posted by danespann View Post
    Every E34 needs the same things in the end.

  4. #54
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    Not a big update: Greg has been in a wormhole of designing M60 FI parts, which will interest a few here. He's basically reverse-engineered and improved Dinan's Vortech kit. More details later...

    On the pulley front, we're going to use the 11511733429 OEM water pump pulley for a slick, $25 underdrive pulley. Greg just needs to finalize the pulley grooves on the other two pulleys, and then we'll test fit on my car with belts, and the kit will be ready to go! We should have a few spare sets and can make more as demand...demands.
    - Brent
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    Quote Originally Posted by danespann View Post
    Every E34 needs the same things in the end.

  5. #55
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    Awesome!

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  6. #56
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    Here's a good thread with some part numbers and whatnot regarding the pulleys and belt sizes.

    https://www.bimmerforums.com/forum/s...ooling-system)

    95 540i6 M Sport - 95 525it S52/OBD2 - 433k E36 328i5 - X5D that hit a pothole - IG: @justinmurray95

  7. #57
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    Can't wait!

  8. #58
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    Quote Originally Posted by atl530i View Post
    Here's a good thread with some part numbers and whatnot regarding the pulleys and belt sizes.

    https://www.bimmerforums.com/forum/s...ooling-system)
    Cheers Justin, thank you! That will be a great resource.
    - Brent
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    Quote Originally Posted by danespann View Post
    Every E34 needs the same things in the end.

  9. #59
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    Count me in, please. What is the lead time on a set?
    CURRENT:
    Racecar: '81 e21 320i Group2. GT28 @ 25psi, MS2, e28 M5 suspension/brakes underneath, forged, cammed, 400bhp, 2190lbs, etc, etc...
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    New daily: e60 530i sport package. Stock.

  10. #60
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    Quote Originally Posted by dangerwillrbnsn View Post
    Count me in, please. What is the lead time on a set?
    Cool. We should only be a few weeks out at this point.

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    Quote Originally Posted by danespann View Post
    Every E34 needs the same things in the end.

  11. #61
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    Quote Originally Posted by BleedsBlue View Post
    Cool. We should only be a few weeks out at this point.

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    Setting cash aside and expectations high ^_^

  12. #62
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    Prototypin' like a baws: PS pulley shown. There was an issue with the way this one was grooved, which Greg is working on (amongst the other 900 things). This is why you prototype!

    The rest are all produced, just awaiting groovin'.

    - Brent
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    Quote Originally Posted by danespann View Post
    Every E34 needs the same things in the end.

  13. #63
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    I would be down for a set of those.

    95 540i6 M Sport - 95 525it S52/OBD2 - 433k E36 328i5 - X5D that hit a pothole - IG: @justinmurray95

  14. #64
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    Quote Originally Posted by atl530i View Post
    I would be down for a set of those.
    Boom!

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    Quote Originally Posted by danespann View Post
    Every E34 needs the same things in the end.

  15. #65
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    Biiiiiig bump, Angry Ass Solutions now has the prototype set of underdrive pullies "in the wild" running around!

    UnrulyGrace's newly minted motor has our inaugural set: the larger, custom-milled and grooved aluminum power steering pulley, and OEM Euro-spec larger water pump pulley:



    To our entertainment, this pulley set (only a few mm off of VAC's set) works perfectly with the factory belt size. Not only does VAC sell you a $150 part that is essentially no larger than a $25 OEM part (their aluminum WP piece is quite a bit heavier than OEM, further lowering the ROI), they make you buy a belt as well--when you can run what you brung, in reality.

    We are heading into production with this prototyping complete, and will be releasing this product on www.angryasssolutions.com shortly. I will update this thread, and PM those who signed up for a set once we're ready. The final aluminum PS pulleys will be anodized black, but of course, and we will not provide a belt since your stock one works/is available at any auto parts store (even if they have to order it, which happened to Grace and I).
    - Brent
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    Quote Originally Posted by danespann View Post
    Every E34 needs the same things in the end.

  16. #66
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    Great stuff! I recommend you guys specify exactly which belt is the correct size. As the owner of a Euro 540i, my standard belt length is different than for a USA model because mine came stock with the larger water pump pulley. I believe the stock size for USA is 7PK1580 while the stock Euro size is 7PK1605.

  17. #67
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    Quote Originally Posted by eddycooper View Post
    Great stuff! I recommend you guys specify exactly which belt is the correct size. As the owner of a Euro 540i, my standard belt length is different than for a USA model because mine came stock with the larger water pump pulley. I believe the stock size for USA is 7PK1580 while the stock Euro size is 7PK1605.
    Good input, we certainly will specify!

    -Greg


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  18. #68
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    Quote Originally Posted by eddycooper View Post
    Great stuff! I recommend you guys specify exactly which belt is the correct size. As the owner of a Euro 540i, my standard belt length is different than for a USA model because mine came stock with the larger water pump pulley. I believe the stock size for USA is 7PK1580 while the stock Euro size is 7PK1605.
    Very good point, and I had no idea because we just got the stock 1580mm belt to fit on UnrulyGrace's car with no issues. There is enough adjustment in the tensioner, apparently, but we will be sure to call this out. There is also a 1594mm belt, which fit on the test car as well as the 1580 belt.

    Emailed you back as well, Eddy; you have been a huge help and we appreciate it!
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    Quote Originally Posted by danespann View Post
    Every E34 needs the same things in the end.

  19. #69
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    We are live with 6061, Mil-spec anodized power steering pulleys; OEM Euro BMW water pump pulleys; and associated hardware! Coming soon we will have belt options as well.

    Check it out: https://www.angryasssolutions.com/pa...rdrive-pulleys
    Last edited by BleedsBlue; 05-30-2018 at 12:02 AM.
    - Brent
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    Quote Originally Posted by danespann View Post
    Every E34 needs the same things in the end.

  20. #70
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    Pretty rad, I like the caution note on the site about operating in cooler temps... food for thought
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  21. #71
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    Quote Originally Posted by staystackin View Post
    Pretty rad, I like the caution note on the site about operating in cooler temps... food for thought
    Appreciate that, Wes! We will never prioritize making moolah over honesty and transparency.

    Unlike certain competitors, who offer a water pump pulley the same diameter as the $20 OEM Euro unit, in heavier aluminum, for $150+...
    - Brent
    www.angry-ass.com

    Quote Originally Posted by danespann View Post
    Every E34 needs the same things in the end.

  22. #72
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    I don't know that I'd really need or benefit from these pulleys now with that info.


    BUT, if there's anyway a product video or any video could benefit you guys - please don't hesitate to ask. I'm happy to help out fellow e34 community people who are helping to further the life spans and enjoyment of the e34s.
    - Hans - Mauritiusblau Metallic - Ultimate Klasse - Progress Thread: LINK



  23. #73
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    Quote Originally Posted by staystackin View Post
    I don't know that I'd really need or benefit from these pulleys now with that info.


    BUT, if there's anyway a product video or any video could benefit you guys - please don't hesitate to ask. I'm happy to help out fellow e34 community people who are helping to further the life spans and enjoyment of the e34s.
    We are very interested in ramping up (from nothing, LOL) that side! Give us a shout at jolly . ass @angry ass solutions . com (no spaces) when you get a chance?

    We'll be dyno-testing the pullies. VAC claims a very optimistic 8whp with the same dimension units, but we'll see!
    - Brent
    www.angry-ass.com

    Quote Originally Posted by danespann View Post
    Every E34 needs the same things in the end.

  24. #74
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    Bump!

    We produced a small first batch of these pulleys (4x units), sold out now; but we keep receiving requests about them, and I bet we can drudge up enough committed and interested buyers to whip up a second production run.

    I know of at least 3x interested parties, let's get a list going here. I will post to IG, as well.

    We will require a near-50% deposit down for these. So $50 a head will reserve a PS pulley. No deposit is needed for the WP pulleys, since we get them from BMW and resell them at no profit.

    Angry Ass capital comes from Greg and myself, and we are currently focused on building complete E34 M5s. While we're happy to support the M60-based cars, we do need help funding these production runs

    There is motivation to make Production 2 a larger batch; if we hit a certain number, we can lower your price!

    Post here; PM me here; send us a DM on IG; or email us at jolly.ass @ angry ass solutions . com
    - Brent
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    Quote Originally Posted by danespann View Post
    Every E34 needs the same things in the end.

  25. #75
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    Was there ever a dyno test/reviews/feedback from the first batch? Any overheating issues with the water pump pulley? Increased steering effort with the other? My first car didn't even have power steering so probably not a huge issue. I'd be tentatively interested based on some feedback. Thanks!

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