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    • Weistec's W.4 M157 turbocharger upgrade package makes 856 wheel horsepower on pump gas

      Here it is, the Weistec W.4 AMG M157 5.5 liter V8 turbocharger upgrade package. BenzBoost showed teasers previously of the turbo hardware and a preliminary dynograph. Well, the production kit shows 856 horsepower and 759 lb-ft of torque at the wheels.


      That is at all four wheels on a 2016 W212 E63 AMG S. Additionally, with 91 octane pump fuel at 20 psi with supplemental methanol injection. The car also has the Weistec 722.9 Bulletproof transmission upgrade:


      That is a ton of power and torque and keep in mind this is not with the turbochargers turned up as this M157 is stock internally. There will be a W.5 package with forged internals which of course have been available from Weistec since last year.

      What will this turbo upgrade do with a built M157 and the turbos cranked up? Well, we will soon find out but expecting 1000+ is within reason.

      As for performance the W.4 was measured at 60-130 in 6.153 seconds:


      We will have to wait and see on the 1/4 mile times.

      Overall, Weistec has done a ton of testing on the W.4 upgrade and you can rest assured that it delivers as advertised: http://weistec.com/m157-w-4-package.html
















      M157 W.4 Package


      The M157 W.4 package is the package for customers seeking the pinnacle of performance and refinement. At the core of the M157 W.4 Package is the M157 W.4 Turbo Upgrade. Taking a giant leap ahead of all other available upgrades, the M157 W.4 Turbochargers completely replace the factory units. They are ball bearing, featuring CNC machined billet aluminum compressor wheels capable of flowing 65lb/min.

      To feed these monster turbochargers, completely new airboxes and intake tubes are included. The Weistec Turbo-Folds provide significantly increased flow of exhaust gasses compared to the stock turbo-fold. The Weistec M157 True Downpipes perfectly mate up to the M157 W.4 Turbochargers to ensure minimal restriction once the exhaust gasses have gone through the turbine.

      An Engineered Solution


      The W.4 Turbochargers are the most capable production turbochargers available for the M157 engine. The W.4 Turbocharger Package which includes our M157 ASV/Water-Methanol Injection System is capable of producing 1000+ crank horsepower (820~850HP at the wheels on a Dynojet Dyno) on 91 octane pump gas. What’s equally impressive is that these numbers are achieved at only 20psi, and 20 psi is only the beginning.

      The goal of the W.4 Turbocharger Package was to have a complete package that provides amazing gains in power and performance, but does not require race gas, or an iced down intercooler system. Something that can be daily driven, filled up at any gas station, and is within power capacity of the factory engine internals.

      Control = Reliability



      While the M157 engine is a very robust engine in factory form, we have seen a couple weak leaks at extreme power levels. The most common is a bent connecting rod. If the engine is producing a sustained 1000 lb-ft of torque (820-850 lb-ft at the wheels) or more, all it takes is one knock event to bend a rod. This was taken into consideration with the ECU tuning for the W.4 Power Package as they can make far more power and torque than a stock M157 engine can handle. Boost is controlled and tapered up to the peak of 20psi as RPM’s increase. This creates a broad torque curve that remains under 800 lb-ft (at the wheels) while allowing power to continually increase towards redline, minimizing stress on the rods as well as the rest of the drivetrain. With a fully built M157 and other supporting upgrades, expect to see significantly higher power numbers as the Turbochargers can flow enough air volume for 1400+ crank horsepower!

      Key Features:



      • Ball Bearing Turbochargers
      • Removed Restriction of Stock Turbo-Folds
      • Weistec M157 Airboxes with Turbo Intake Tubes
      • Greatly Increased HP and Torque
      • Improved Throttle Response
      • Eliminated Top Speed Limiter
      • Optimized Fuel, Spark and Boost
      • CNC Billet Aluminum Compressor Wheel Upgrade
      • 65lb/min Compressor Flow
      • Improved Airflow
      • Aggressive Exhaust Note
      • Free Flowing Exhaust
      • 1000+HP Capable

      This article was originally published in forum thread: Weistec's W.4 M157 turbocharger upgrade package makes 856 wheel horsepower on pump gas started by Sticky View original post
      Comments 99 Comments
      1. MR747's Avatar
        MR747 -
        Amazing Weistec well done
      1. Aces's Avatar
        Aces -
        Impressive. Tho saying just 91 octane is deceiving since there is meth injection.
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by Aces Click here to enlarge
        Impressive. Tho saying just 91 octane is deceiving since there is meth injection.
        It's not deceiving. Methanol injection is clearly detailed. A title only has so much space and the car is on pump gas.
      1. Vasily1's Avatar
        Vasily1 -
        Well just my 2 cents being an owner of the 1180hp E63 for a while:
        1) turbos & manifolds look great i hope they work great as well;
        2) keeping a stock single intercooler in the hot "V" is a mistake, even meth injection won't keep IATs low as required for sustainable results (i believe the owner will want at least 5-6 constant runs); the decision is 2 separate intercoolers e.g. from SLR instead of airboxes;
        3) airboxes even enlarged won't feed enough those turbos; the solution - direct airintakes behind the headlamps and respectine holes in the bonnet;
        4) stock fuel pump is maxed out at ca. 950-1000hp and you will need to install another one under the back right seat.
        That should be all. And if i were a client i would certainly skip W.4 for W.5 with forged internals ��.
      1. Vasily1's Avatar
        Vasily1 -
        As for dynamics: 6.153 for 60-130mph corresponds to ca.5.5 for 100-200km/h (i.e.62-124mph). But this from my experience is very slow for 1000hp, 2 years ago on stock engine + Renntech turbo kit (780hp or 660awhp) i had 5.8 for 100-200km/h, after only software update by GAD it scored 700awhp and 5.4-5.5 for 100-200km/h. Hence this Weistec E63 should be ca. 700awhp rayher than 850+awhp.
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by Vasily1 Click here to enlarge
        As for dynamics: 6.153 for 60-130mph corresponds to ca.5.5 for 100-200km/h (i.e.62-124mph). But this from my experience is very slow for 1000hp, 2 years ago on stock engine + Renntech turbo kit (780hp or 660awhp) i had 5.8 for 100-200km/h, after only software update by GAD it scored 700awhp and 5.4-5.5 for 100-200km/h. Hence this Weistec E63 should be ca. 700awhp rayher than 850+awhp.
        Vasily this is over 850 wheel on an awd Dynojet. More track times will come and 200 kph is 124 miles per hour so not exactly comparable.

        I'm not sure why you are calling it slow or implying it isn't making the power. It isn't 700 awhp and they have an in-house Dynojet. You are drawing very broad and flawed conclusions based on estimates.
      1. Vasily1's Avatar
        Vasily1 -
        Click here to enlarge Originally Posted by Sticky2 Click here to enlarge
        Vasily this is over 850 wheel on an awd Dynojet. More track times will come and 200 kph is 124 miles per hour so not exactly comparable.

        I'm not sure why you are calling it slow or implying it isn't making the power. It isn't 700 awhp and they have an in-house Dynojet. You are drawing very broad and flawed conclusions based on estimates.
        Sticky, i just used the data from their data log picture. You can calculate 62-124mp/h yourself but it will be the same 5.5 which was shown by my car at 700awhp. The claimed 850awhp should score high 4' for 62-124mp/h.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Vasily1 Click here to enlarge
        Sticky, i just used the data from their data log picture. You can calculate 62-124mp/h yourself but it will be the same 5.5 which was shown by my car at 700awhp. The claimed 850awhp should score high 4' for 62-124mp/h.
        Vasily, you seem to be posting GAD stuff on every vendor article about new products.

        I think GAD does great stuff but this is a new product article for a vendor.

        Also, GAD does not have an off the shelf solution like this. I can't go on their site and order this package, configure it for 91 octane pump gas, see any 91 octane pump gas testing, and there isn't any pricing or Dynojet graphs either.

        I have no idea what your car's output was when it ran 5.5 but the way you are comparing is not fair and is flawed. We're talking about different conditions and different spreads.

        You can't say because your car did something when it was at 700 wheel on a different type of dyno that it means this car is at 700 whp. The dyno shows 850+ to all four wheels. I have not seen any dyno like that from GAD on any product comparable to this and available to order.

        Plus, Weistec also has an off the shelf solution for built M157 internals as well which they have been testing for two years now.

        Keep in mind as well, as more people run this package there will be more testing and results. I think times will get quicker as more people test especially on a variety of fuels and boost levels. The times are not set in stone.

        Nobody else is showing 850 awhp at 20 psi.

        Please keep all of this in mind.
      1. Vasily1's Avatar
        Vasily1 -
        Sticky, i compared their dynamics first with Renntech kit i had which showed 660awhp and was 5.8 fast for 100-200km/h. Then with the same kit but on software retune by GAD. I have all the dyno graphs and can post them here if you like as well with Race logic data sheets. My message was not about Renntech or GAD in this spread but about questionable "1000+hp" being so slow for 100-200km/h (i.e. 62-124mp/h).
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by Vasily1 Click here to enlarge
        Sticky, i compared their dynamics first with Renntech kit i had which showed 660awhp and was 5.8 fast for 100-200km/h. Then with the same kit but on software retune by GAD. I have all the dyno graphs and can post them here if you like as well with Race logic data sheets. My message was not about Renntech or GAD in this spread but about questionable "1000+hp" being so slow for 100-200km/h (i.e. 62-124mp/h).
        If you want to post data feel free to create a thread for it.
      1. gzim335's Avatar
        gzim335 -
        Click here to enlarge Originally Posted by Vasily1 Click here to enlarge
        As for dynamics: 6.153 for 60-130mph corresponds to ca.5.5 for 100-200km/h (i.e.62-124mph). But this from my experience is very slow for 1000hp, 2 years ago on stock engine + Renntech turbo kit (780hp or 660awhp) i had 5.8 for 100-200km/h, after only software update by GAD it scored 700awhp and 5.4-5.5 for 100-200km/h. Hence this Weistec E63 should be ca. 700awhp rayher than 850+awhp.
        Actually it's right where it should be,my brothers 740whp rwd ccb n no pano roof E63 did 6.6sec 60 to 130,add another 100whp and easy 500lb more n 6.1 is right where it should be
      1. Vasily1's Avatar
        Vasily1 -
        Click here to enlarge Originally Posted by gzim335 Click here to enlarge
        Actually it's right where it should be,my brothers 740whp rwd ccb n no pano roof E63 did 6.6sec 60 to 130,add another 100whp and easy 500lb more n 6.1 is right where it should be
        I can name here at least 3 tuners who showed 6.0 for 100-200km/h (which corresponds to your 6.6 for 60-130mp/h) for their software + exhaust CLS63 4matic at 740-750hp which is 610-620awhp.
      1. 65AMG's Avatar
        65AMG -
        I dont see why a Dynojet should be more accurate than a Superflow, Maha etc. It all depends on the dyno operator and the cooling fans etc. We have a lot of accurate Dyno types and Vasily have been trough all different tuning stages of the M157. I am sure a Dynojet would show the same. BTW we have also some tuners which use Dynojet and in the end the result is the nearly same.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 65AMG Click here to enlarge
        I dont see why a Dynojet should be more accurate than a Superflow, Maha etc.
        It's not that it is 'more accurate' it is that there is a far larger sample size for context especially in the USA.
      1. 65AMG's Avatar
        65AMG -
        It would be easier to compare thats correct but its complicated with different correcting factors, different cooling and so on. In my opinion Vasilys Vbox times are correlating very accurate to his Crank HP figures. Times on the street show how much HP you have its this easy.Problem is wheel HP is different on Dynojet and Superflow. But crank should be the same if it was measured correctly from the Dyno itself.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 65AMG Click here to enlarge
        Problem is wheel HP is different on Dynojet and Superflow. But crank should be the same if it was measured correctly from the Dyno itself.
        Yes, it is different. They do not calculate wheel hp the same way and the Dynojet only calculates wheel output meaning if you correct it to crank there will be an artificial correction factor. You simply would have to put them on the same dyno.

        Regardless, 850 to all four wheels on a Dynojet is a TON of power. People also seem to be missing this was done at 20 psi on pump and meth.

        These turbos easily support more power. If you aren't already impressed (why wouldn't you be?) when they crank these up eyes are going to pop.
      1. Vasily1's Avatar
        Vasily1 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Yes, it is different. They do not calculate wheel hp the same way and the Dynojet only calculates wheel output meaning if you correct it to crank there will be an artificial correction factor. You simply would have to put them on the same dyno.

        Regardless, 850 to all four wheels on a Dynojet is a TON of power. People also seem to be missing this was done at 20 psi on pump and meth.

        These turbos easily support more power. If you aren't already impressed (why wouldn't you be?) when they crank these up eyes are going to pop.
        My eyes would rather pop if i see them trapping higher than 150mp/h. However to be more realistic and judging by the posted VBox data sheet a 140mp/h pass would be quite an achievement.
      1. leveraged sellout's Avatar
        leveraged sellout -
        This whole S63/M157 fight is getting real interesting. Everyone wins.

        Weistech has a long history of delivering huge, I trust what they have to say.
      1. gaspam's Avatar
        gaspam -
        there is a guy down here in miami that has w4 on his cls and saw a vid of him running pretty even to a e55 until end of 3rd and then pulled on him... I would of expected w4 to be much faster than e55

        https://instagram.com/p/BR4l8K9BTr1/
      1. Vasily1's Avatar
        Vasily1 -
        Click here to enlarge Originally Posted by gaspam Click here to enlarge
        there is a guy down here in miami that has w4 on his cls and saw a vid of him running pretty even to a e55 until end of 3rd and then pulled on him... I would of expected w4 to be much faster than e55

        https://instagram.com/p/BR4l8K9BTr1/
        That's cool hands down. But may be you ask that guy on cls to run on VBox sport 1/4mile and 1/2mile? That would be much more comprehensive. Thanks in advance.