Close

    • Stroke your E46 M3! VAC Motorsports S54 Stroker Kit

      Our VAC S54 3.4L Stroker Kit has been properly designed and tested to ensure performance, durability, and reliability. This kit is suitable for a street car or all out racing vehicle! With years of proven performance in the field, there is no better choice when it comes to these crucial components. Our stroker crank is the finest in the market by large margin. This is made in the UK to beyond OE Motorsport quality by Arrow Precision. Arrow manufacturing standards are at the highest level so you can rest assured you have the best S54 crank in your engine.








      Upper Echelon S54 Performance!

      With years of experience and an optimized design, this stroker kit is a trusted setup. We have proven this configuration works brilliantly and reliably, all while using BMW style bearings. Don't bother with weaker offset-ground or modified cranks, or those that have to use a domestic style bearing.

      We have many race teams running this crank and our stroker components with great success. They have won multiple It is proven to win in the even the most grueling scenarios of 24-Hour endurance races.

      Crankshaft:
      -Proven in Grueling Endurance Racing - Championship Winning
      -Machined from the best-quality steel billet
      -Exacting specification
      -No need for non-BMW bearings
      -Properly nitrided
      -Exclusively manufactured by Arrow Precision to our specifications

      Pistons:
      -Exceptional quality and consistency
      -Choice of specs
      -Balanced out of the box
      -Highly durable
      -Pre-clearanced for most race cams (always check Piston to valve clearance*)
      -Includes Rings, Standard Pins & Locks


      Rods:
      -Closely balanced out of the box
      -Include ARP hardware
      -Best in class Strength-to-weight ratio
      -Proven results in this stroker kit


      Understanding Your Stroker:
      -This crankshaft has a 97mm stroke
      -A bore size of 87mm gives a displacement of 3459.8cc
      -A bore size of 87.5mm gives a displacement of 3499.7cc

      Commonly ordered compression ratios:
      13:1 [Race use] High octane race fuel
      11.5:1 [Stock CR] Good for pump fuel, low-boost (>9psi) turbo, Superchargers
      9.0:1 [Low CR] Recommended for high-boost turbocharged engines, Big custom charger

      With maximum reliability and displacement, your S54 will scream! Our crank maintains a lightweight design and offers gains in torque and horsepower throughout the powerband.

      VAC S54 Stroker Kit includes:

      VAC 3.4L/3.5L Billet Crank with 97mm Stroke
      (6) CP Forged Pistons; with high quality rings, pins, & locks (any compression ratio/ .5mm bore increments)
      -Optional Slipper Skirt X-forging Pistons (+$100)
      -Optional skirt & dome coatings (+$60 per piston for both)
      -Optional DLC coated Piston Pins (+$60 each)
      (6) Arrow Precision forged connecting rods w/ ARP hardware
      -Option, Titanium rods for the ultimate in high rpm capability


      VAC Tech Tip:
      This crank can help give the S54 a wider powerband with more torque across the entire powerband, giving you the edge off the line and out of corners when you need it most! Always remember to check piston to valve clearance when assembling your engine.

      Many race teams don't like to give away their competitive advantage: here are some of our customers who will share their successful formula. Check out these hill climb racers from the Middle East running VAC power!!!...




      Buy Now: http://store.vacmotorsports.com/vac-...-kit-p757.aspx
      This article was originally published in forum thread: VAC Motorsports | S54 Stroker Kit - Always In Stock! started by Mike@VAC View original post
      Comments 26 Comments
      1. GG///M3's Avatar
        GG///M3 -
        Are the bearings wider then stock? If not I don't see how is is better then a crank modded to wider bearing which has been proven to be more reliable on motors that see high rpms or that are tracked.
      1. Mike@VAC's Avatar
        Mike@VAC -
        Click here to enlarge Originally Posted by GG///M3 Click here to enlarge
        Are the bearings wider then stock? If not I don't see how is is better then a crank modded to wider bearing which has been proven to be more reliable on motors that see high rpms or that are tracked.
        Not quite sure what your saying here but we work with engine component partners who are OE for Bugatti and other companies. From Arrow's website "At Arrow Precision, we manufacture a range of high quality products that span all areas of motorsport. From ‘track day’, ‘fast road’ car and bike applications all the way through vintage and classic, club racers, speedway world championship, British Superbike, Motor GP, World Rally Championship, Nascar, LeMans, Touring Car, Formula 1 and many more.." This is all true, no internet marketing BS.

        We have built over 100 BMW racing engines and we work with 100s of BMW engine builders/racers who built 1000s of engines/racing cars. What we and our partners/clients do is literally 'proven to be reliable' ;-)
      1. Petrolhead's Avatar
        Petrolhead -
        I think he was wondering if this crank has a wider rod bearing then stock, as the s54 does not have the most durable ones at original stroke length.
      1. Mike@VAC's Avatar
        Mike@VAC -
        Click here to enlarge Originally Posted by Petrolhead Click here to enlarge
        I think he was wondering if this crank has a wider rod bearing then stock, as the s54 does not have the most durable ones at original stroke length.
        As stated above, our championship winning clients do not mod the crank to accept a much wider bearing. We do not modify the crank. Arrow Precision, the manufacturer of world leading crankshafts does not see the need to change anything either.

        Finally, BMW Motorsport did not modify the crank (other than stroke) when they raced S54s. They did run a Motorsport bearing but the crank was not modified. Even though this is common knowledge at VAC, I called a guy this AM who used to build the Motorsport engines to confirm: they did not modify any crank (other than stroke).
      1. Twinturbom3's Avatar
        Twinturbom3 -
        Mike,

        May I chime inClick here to enlarge

        My S54 B35 crankshaft is from VAC, Arrow Precision.

        Bought it 30 months ago and have had Z E R O issues.

        My 4,23 s 60-130 mph has been made with the VAC stroker crankshaft.

        Its a piece of art.

        Raises low end torque.

        Raises top end power.

        Allows to put bigger turbochargers w/o sacrificing spool.

        I am about to buy second stroker crankshaft, in fact was waiting for them to get on stock.

        I ve been running on coated rod and main bearings of VAC as well.
      1. Mike@VAC's Avatar
        Mike@VAC -
        Thanks for posting the facts Mert! Hurry, I still have that 1 crank ready for you Click here to enlarge
      1. digger's Avatar
        digger -
        Mike, got any dyno plots of some NA builds you can post?
        how much does the crank weigh?
        does it require a slightly different spec harmonic balancer?
        do you retain stock rod length?
        What rpm have NA engines been turning with this crank reliably?
      1. Twinturbom3's Avatar
        Twinturbom3 -
        Click here to enlarge Originally Posted by digger Click here to enlarge
        Mike, got any dyno plots of some NA builds you can post?
        how much does the crank weigh?
        does it require a slightly different spec harmonic balancer?
        do you retain stock rod length?
        What rpm have NA engines been turning with this crank reliably?

        Standard rod length.

        Standard harmonic balancer.

        9000-9200 rpm no issues. Add to that this is a 1200 whp S54 B35.

        You cant go wrong with this cranshaft.
      1. Sticky's Avatar
        Sticky -
        OP edited slightly and promoted to the front page.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
        Standard rod length.

        Standard harmonic balancer.

        9000-9200 rpm no issues. Add to that this is a 1200 whp S54 B35.

        You cant go wrong with this cranshaft.
        Good to know you're running this and at that high RPM.
      1. inlineS54B32's Avatar
        inlineS54B32 -
        I need to find an E46 M3 - and build it. I love and miss my E46, and when I see this piece of artwork, I want it. Like a kid before Christmas want - badly. I always check out the video on youtube (Israeli guys in a race E46 M3 on the streets + SMG w/ straight-cut gears) - and it makes me drool.
      1. deemo319's Avatar
        deemo319 -
        This in an E85 M Roadster is of interest to me.
      1. kiln's Avatar
        kiln -
        Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
        Standard rod length.

        Standard harmonic balancer.

        9000-9200 rpm no issues. Add to that this is a 1200 whp S54 B35.

        You cant go wrong with this cranshaft.

        Did u delete the vanos?
      1. Twinturbom3's Avatar
        Twinturbom3 -
        Click here to enlarge Originally Posted by kiln Click here to enlarge
        Did u delete the vanos?
        nope vanos fully working.
      1. bobS's Avatar
        bobS -
        Nice, I want to see a street- able s65 stroker!
      1. inlineS54B32's Avatar
        inlineS54B32 -
        Click here to enlarge Originally Posted by bobS Click here to enlarge
        Nice, I want to see a street- able s65 stroker!
        They got em (VAC), as does RD, and DINAN pumps them out too... I will try to find the article, @Sticky wrote a good one that outlined them awhile back
      1. inlineS54B32's Avatar
        inlineS54B32 -
        Here is the one by VAC: http://www.bimmerboost.com/showthrea...=stroker+dinan
        Here is the article on the comparo between RDSport and Dinan: http://www.bimmerboost.com/showthrea...=stroker+dinan

        Both good reads.
      1. bobS's Avatar
        bobS -
        I saw that but I thought VAC said all have been for race cars so far, not street cars
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by bobS Click here to enlarge
        I saw that but I thought VAC said all have been for race cars so far, not street cars
        I think it's just the ones they've shared on the forums.... The 2 in the first thread are both on 100 octane, the second one is for a sprint car (which is why it's tuned on a Pectel).

        I'm sure VAC would have no problem building you a 4.4L S65 stroker and then tuning it off the factory DME for street use.
      1. Sticky's Avatar
        Sticky -
        I really think to see an S65 stroker shine you need to pair with aggressive Schrick cams.