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    • Weistec built motor W.5 AMG M157 engine package coming soon - 1000+ hp?

      Weistec officially released their W.4 AMG M157 turbocharger upgrade package last month. That package is for the stock M157 internals but the numbers are incredible with over 850 horsepower to all four wheels on 91 octane pump fuel with meth at only 20 psi of boost.


      The W.4 torque curve is tuned to be easier on the rods down low. What happens when you go to aftermarket rods and engine internals though? Well, that is exactly what we are going to find out shortly.

      Weistec is assembling an M157 with their forged internals specifically for a W.5 setup. That means the W.4 turbochargers but with more boost and far more aggressive tuning.

      What will they hit? Well, BenzBoost has a general idea but let's just say ~1000 horsepower is the range they are shooting for.

      The M157 is about to become a quadruple digit monster and looks poised to regain the horsepower crown from the BMW M S63TU.

      Quote Originally Posted by Weistec
      Capable of over 1000hp, another M157 engine gets the full Weistec treatment: Forged Pistons and Connecting Rods, CNC Ported Cylinder Heads, Sleeved Engine Block and ARP Hardware throughout. Did we mention this car is also receiving upgraded W.4 turbochargers?

      This article was originally published in forum thread: Weistec built motor W.5 AMG M157 engine package coming soon - 1000+ hp? started by Sticky View original post
      Comments 11 Comments
      1. Mrki's Avatar
        Mrki -
        Dont work with classic open deck
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Mrki Click here to enlarge
        Dont work with classic open deck
        ?
      1. subaru335i's Avatar
        subaru335i -
        Maybe he was saying 1000whp wont work with the stock open deck. Do you know if Weistec is adding and block inserts/closed deck?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by subaru335i Click here to enlarge
        Maybe he was saying 1000whp wont work with the stock open deck. Do you know if Weistec is adding and block inserts/closed deck?
        I don't know but I'm sure we'll find out soon.
      1. micklej's Avatar
        micklej -
        As Im no expert on this stuff Id like to put out a question to others who are. Why is it that people push the amount of hp when they discuss cars. I mean surely its more interesting to put what the car is capable of doing i.e 0 to 60 0 to 124 1/4 mile mile etc after these modifications or how much quicker than stock it is. Just seems all the adverts and talk I see is about horse power gains but never what the car can actually do. Who cares if a car has 1000hp if it is only slightly faster than its untuned version or slower than a car it competes against which has less hp. Just like some stats to go with the HP figures. Just a question.....
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by micklej Click here to enlarge
        As Im no expert on this stuff Id like to put out a question to others who are. Why is it that people push the amount of hp when they discuss cars. I mean surely its more interesting to put what the car is capable of doing i.e 0 to 60 0 to 124 1/4 mile mile etc after these modifications or how much quicker than stock it is. Just seems all the adverts and talk I see is about horse power gains but never what the car can actually do. Who cares if a car has 1000hp if it is only slightly faster than its untuned version or slower than a car it competes against which has less hp. Just like some stats to go with the HP figures. Just a question.....
        Well, it's up to the customer to set the times.

        If I give you a Mustang GT350R and you only run a 14.0 in the 1/4 mile that is not the car's fault or due to the lack of power.

        Eeeking out performance requires driver skill, conditions, tires, suspension work, etc. The dyno just tells you the horsepower which is fine.

        This is going to be VERY fast. Big power builds like this are also why 1/2 mile and rolling events are taking over.
      1. micklej's Avatar
        micklej -
        Ok cheers. Just would have liked to roughly know when they say 1000hp conversion what the figures roughly are. I guess they would tell the customer. I too prefer rolling starts and 1/2 mile races. With all these electric cars coming it wont be long before the blistering 0 to 60 territory is full of hyper cars as well as main stream BMWs, Audis , Fords, and skodasetc. All electric cars are going to be able to hit 60 extremely quick. I doubt manufactures will sit back and let tesla alone hold that selling point.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by micklej Click here to enlarge
        Ok cheers. Just would have liked to roughly know when they say 1000hp conversion what the figures roughly are. I guess they would tell the customer. I too prefer rolling starts and 1/2 mile races. With all these electric cars coming it wont be long before the blistering 0 to 60 territory is full of hyper cars as well as main stream BMWs, Audis , Fords, and skodasetc. All electric cars are going to be able to hit 60 extremely quick. I doubt manufactures will sit back and let tesla alone hold that selling point.
        Since we know 850 awhp is possible at 20 psi you can pretty much imagine where it will go from there on a built motor.
      1. Bowser330's Avatar
        Bowser330 -
        If a 3.0l I6 N54 open deck block can do this.....http://www.bimmerboost.com/content.p...-record-861whp

        Then I don't see why the 5.5L V8 M157 open deck block, nearly 2x the displacement, can't do 1000whp....
      1. Sticky's Avatar
        Sticky -
        Honestly, if we are going to discuss the strength of the block @Weistec is probably best qualified to comment on it.
      1. micklej's Avatar
        micklej -
        Seen this one .