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    • Ariel Atom V8 takes on a BMW S1100RR (among others)

      This is an absolutely awesome video from Top Gear. It has the Atom V8 take on the Lexus LF-A and Gallardo LP560 Superleggera in a 0-100-0 contest. The cars are no match for the Atom V8 so the BMW S1100RR is used. Enjoy!


      This article was originally published in forum thread: Ariel Atom V8 takes on a BMW S1100RR (among others) started by Sticky View original post
      Comments 25 Comments
      1. DavidV's Avatar
        DavidV -
        This is part of the Top Gear episode from last sunday.
        With Tiff Needell at the wheel of the 500bhp Atom.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DavidV Click here to enlarge
        This is part of the Top Gear episode from last sunday.
        With Tiff Needell at the wheel of the 500bhp Atom.
        Yep, and Tiff rules.
      1. 600whp S4's Avatar
        600whp S4 -
        Yeah give me the 35K dollar version And ill build a k26 stroker with a very small quick spooling turbo and 600hp
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by 600whp S4 Click here to enlarge
        Yeah give me the 35K dollar version And ill build a k26 stroker with a very small quick spooling turbo and 600hp
        A hayabusa V8 makes it feel more like an F1 car.
      1. DBFIU's Avatar
        DBFIU -
        Click here to enlarge Originally Posted by 600whp S4 Click here to enlarge
        Yeah give me the 35K dollar version And ill build a k26 stroker with a very small quick spooling turbo and 600hp
        This IMO would not be an ideal combination. You will have a torqueless motor below 3500 RPM that all of a sudden makes +100 wtq and +150 HP because boots hits you in the face, imagine taking a turn with that in a 1200 lbs car; loose rearend much?

        I prefer linear and predictable torque for a light car like this.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        I prefer linear and predictable torque for a light car like this.
        Plus, I mean, Hayabusa V8 is cooler than Honda 4 cylinder anything.
      1. DBFIU's Avatar
        DBFIU -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Plus, I mean, Hayabusa V8 is cooler than Honda 4 cylinder anything.

        That goes without mention.
      1. 600whp S4's Avatar
        600whp S4 -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        This IMO would not be an ideal combination. You will have a torqueless motor below 3500 RPM that all of a sudden makes +100 wtq and +150 HP because boots hits you in the face, imagine taking a turn with that in a 1200 lbs car; loose rearend much?

        I prefer linear and predictable torque for a light car like this.

        not true a 2.6L will spool a gt30r instantly
      1. DBFIU's Avatar
        DBFIU -
        Click here to enlarge Originally Posted by 600whp S4 Click here to enlarge
        not true a 2.6L will spool a gt30r instantly

        Really so you're saying there is precisely zero measurable lag.

        Sorry but that is wrong, there is a finite amount of time between when you depress the gas pedal and when you actually make boost. Even if that time feels like "instant" for you, around the roadcourse that unpredictable 0.2 seconds is recipe for spinning out when accelerating out of a corner.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        Sorry but that is wrong, there is a finite amount of time between when you depress the gas pedal and when you actually make boost. Even if that time feels like "instant" for you, around the roadcourse that unpredictable 0.2 seconds is recipe for spinning out when accelerating out of a corner.
        Absolutely and I don't give a crap what people say about good spool, a turbo motor never has the throttle response of a high compression NA motor, ever.
      1. DBFIU's Avatar
        DBFIU -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Absolutely and I don't give a crap what people say about good spool, a turbo motor never has the throttle response of a high compression NA motor, ever.

        There is a huge misconception with what people THINK is QUICK SPOOL and NA power.

        Lets rewind.

        A turbocharger is a machine and it has a rotating component that has some inertia. This rotational inertia is unavoidable, and since it is driven off of exhaust gases there is a fluid interaction. It is not belt driven, therefore it is de-coupled from the engine.

        The fluid interaction must be overcome, and that takes time. That time is called lag.


        Lets say you have an NA V8 that is 5.0 liters, as soon as you depress the throttle blade there is something happening inside your engine that wants to accelerate the air. There are probably two pistons on their way down producing instant suction which pulls in a larger volume of air, the only inertia involved with getting more air into the cylinders is called fluid inertance. Fluids like air are light and move fast, they react quickly to pressure signals. Rotating machinery like a turbo has much more inertia than the air itself wanting to go accelerate due to an naturally aspirated vacuum signal; because of this huge amount of inertia (compared to air) that the turbo has you will not get the same throttle response. This is crucial when you are a driver and you THINK the car is going to make X amount of torque but in reality it makes 2X amount of torque and its too late you spun out.

        Or, you want the engine to make X amount of torque to pull you quickly out of a turn and into a chicayne, but guess what the torque comes on too late and you overestimate where you are going to end up because the turbo just smacked you in the face. You brake late and miss the apex like a newb, if anyone here has ever driven auto-x or road course you will understand.

        Food for thought. There is not instant spool, not even on the N54.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        Food for thought. There is not instant spool, not even on the N54.
        But I already know this.
      1. 600whp S4's Avatar
        600whp S4 -
        You guys are bad drivers end of discussion. There are stock turbo evos that win all the time as the nscca champions. there is no lag if you are in the right gear. fine then put a roots supercharger on it. and still make instant power. that 3L v8 N/a is high revving so there is a ton of lack in instant tq
      1. gringotegra's Avatar
        gringotegra -
        A stock evo VIII turbo will have full boost by 2100-2300rpm on a 2.4L Evo stroker...
      1. gringotegra's Avatar
        gringotegra -
        you put a small turbo on a N54 and it will have damn near instant spool lol
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by gringotegra Click here to enlarge
        you put a small turbo on a N54 and it will have damn near instant spool lol
        Damn near isn't instant and the N54 has small turbos. No matter what, it will never respond like a high compression NA motor especially one with individual throttle bodies.

        The power delivery and curve simply is very different.
      1. rt turbo's Avatar
        rt turbo -
        Sweet! the new top gear is out, looks like I have something to watch today!
      1. Sorena's Avatar
        Sorena -
        Top Gear for life
        and BTW i'm the new Stig , don't tell anyone
      1. DBFIU's Avatar
        DBFIU -
        People dont understand physics, I dont care what you feel when you drive it. Inertia has to be overcome to spool a turbo, lag is there; always.

        gringotera, can you answer this question. If I put an evo in low gear and sit at 4300 RPM while moving at a constant speed, what happens when I go WOT?

        I am not talking about a dyno pull when you start at near idle and "omfg it spools by 2100 RPM", lag occurs at 3000 RPM, 4000 RPM, 5000 RPM. Lag is time dependant, it doesnt matter at what point you are in the RPM band, if you are going from partial throttle to WOT at any point you will experience lag, if you can physically prove this is not the case then you should get a nobel prize in applied physics because you are violating laws.
      1. gringotegra's Avatar
        gringotegra -
        Yes lag is there always, i am not arguing that.... just saying put a smaller turbo on the car and it will spool quicker...


        Ill give you an example i personally saw... my friends sand truck is a 540Cu twin turbo Big block... it used to have twin 67mm turbos on it... when they first tuned it, it spooled so fast we really couldnt tell at what rpm, it just went from 0-20 psi like in a a few hundred rpm's lol... pretty much as soon as he floored it, it spooled.. Now thats a big ass motor with IMO 2 small turbo's on it... the truck now has twin 72mm's and it still spools quick, but obviously slower than the twin 67's....

        To answer your question on the evo turbo, yes there will be a tiny bit of lag, but we are talking a few hundred rpm's then full boost will be there with that setup...

        My car has a 62mm turbo on a small 1.8L 4 Cyl.. i don't see any real boost untill about 5000rpm... Peak tq is right around 6500 and it holds until redline@9500rpm.... That is alot more lag than an evo turbo lol