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    • FBO 991.2 GT2 RS on race gas vs. stock McLaren 720S 1/4 mile drag races

      The reality of the situation is that the McLaren 720S simply outmuscles a Porsche 991.2 GT2 RS in stock form. In order to play with a Mclaren 720S, the 991.2 GT2 RS needs some tuning. Fortunately, this GT2 RS has a full exhaust, ECU tune, and is running race gas.


      It still isn't enough (yes the 720S is on R888R tires which make a difference).

      You will notice in the video below (skip to the 5:00 minute mark) the GT2 RS gets the better launch but the 720S still catches up and pulls showing it indeed is still the faster car.

      They both run 10.1X but the 720S is trapping higher than the tuned GT2 RS at 140.58 miles per hour:


      The cars are close enough that it is a driver's race between them:




      Still, if the 720S added a tune the GT2 RS would be done for. The GT2 RS would then need upgraded turbos.

      Incredible machines.


      This article was originally published in forum thread: FBO 991.2 GT2 RS on race gas vs. stock McLaren 720S 1/4 mile drag races started by Sticky View original post
      Comments 9 Comments
      1. Zombie1's Avatar
        Zombie1 -
        Both cars are downright monsters. The 720s is clearly the top dog of this era of super cars. I just feel like everyone forgets the Porsche is down two cylinders, when you take that into account itís really impressive.
      1. F16HTON's Avatar
        F16HTON -
        Same 4.0L displacement.

        720s punches well above its weight class. Very efficient at putting power to ground.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Zombie1 Click here to enlarge
        Both cars are downright monsters. The 720s is clearly the top dog of this era of super cars. I just feel like everyone forgets the Porsche is down two cylinders, when you take that into account it’s really impressive.
        The displacement is 3.8 vs. 4.0 so even if it is down two cylinders it's basically a wash.

        I do prefer the McLaren motor design though.
      1. Bowser330's Avatar
        Bowser330 -
        There are several benefits to having more smaller cylinders than less larger cylinders... (from google)



        • Torque directly scales with the number of cylinders
        • Improve the flatness of the torque distribution over revolution speed.
        • Smaller displacement means smaller pistons, shorter rods, or both. Either way, smaller displacement allows for higher revolution speed, and higher acceleration.
        • Smaller combustion chamber will decrease the time required for the flame expansion. This allows for higher revolution speed.
        • The valves are limiting the gas stream into and out of the cylinder. The valves are subject to the surface-volume ratio. Smaller cylinders are easier to fill and empty through the valves, allowing for higher revolution speed.
        • At a given compression rate, smaller cylinders have to withstand less total force, allowing for a lighter engine structure (less weight).
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        There are several benefits to having more smaller cylinders than less larger cylinders... (from google)
        That is all true but a 2.0 liter V8 is not going to make up for the displacement gap versus say a 4.0 liter 6.
      1. F16HTON's Avatar
        F16HTON -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        That is all true but a 2.0 liter V8 is not going to make up for the displacement gap versus say a 4.0 liter 6.
      1. Sticky's Avatar
        Sticky -
        ^ That's a little bit different...
      1. Bowser330's Avatar
        Bowser330 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        That is all true but a 2.0 liter V8 is not going to make up for the displacement gap versus say a 4.0 liter 6.
        Who said anything about 2.0? My comment was in regards to similar displacements as that’s what was previously commented on...3.8 vs 4.0.
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        Who said anything about 2.0? My comment was in regards to similar displacements as that’s what was previously commented on...3.8 vs 4.0.
        I was exaggerating the difference to point out ultimately displacement rules.