Which is faster? Tuned AMG GT-S, 911 Turbo S or McLaren 650s?

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Old Jan 14, 2016 | 04:50 AM
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Question Which is faster? Tuned AMG GT-S, 911 Turbo S or McLaren 650s?

Ok so which car is faster do you guys/girls think from a dead race 0 to lets say 200 MPH....on a deserted road or highway...

A basic tuned AMG GT-S ...like ECU, headers, exhaust, mid-pipes, etc..etc...

against a new 2017 model Porsche 911 Turbo S coupe with the same upgrades...against a

McLaren 650 S coupe with the same upgrades.....which car is faster...and which one would be the most practical/comfortable to have as a daily driver, which one might be more reliable....used 650S coupes are dipping now in the low 220's (at this rate of depreciation we might see next year around this time used 650S coupes for $170k !!).....wow...220k is around the same price as a heavily optioned & lightly tuned new 2017 model 911 Turbo S coupe (which might do 60 MPH in 2.4 seconds stock, some 2014 models have already done it in 2.5 sec right?)....the AMG is by far the cheapest...so also do you guys think the AMG is easily the best bang for the buck?

Last edited by SL65amg; Jan 14, 2016 at 04:53 AM.
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Old Jan 14, 2016 | 10:52 AM
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my understanding is the tuned (ECU only) GTS while generating more HP the torque gains are shown below 5000 rpm

this means that 0-60 etc times are relatively unaffected because under straight hard acceleration the shifts come over 5000 rpm and you really don't experience any true gains in time. this may explain why none of the tuners have posted faster acceleration times for their ECU tunes.

in real world or track driving you will access that torque under 5000rpm and so the car will be faster overall
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Old Jan 14, 2016 | 12:37 PM
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Faster or quicker? (using your tune adjustment factor only for the GTS):

Quickness to me relates to dig races to 60-100 mph. The Turbo S and the Mac will be quicker here since the GTS with a tune gains gobs of tq in the sweetspot rpm ranges (I gained 134 wheel lb/ft) and there is just not enough grip for the car to compensate. I don't even have downpipes (no headers on this car) and if I had those the tq gain is even greater. The car has too much wheelspin.

Faster: For this Ill consider rolling runs from 30 to 150 or so. The GTS with these mods will play well with a stock Turbo S as the AWD has parasitic loss and drag. It would be a good rolling race with a modded GTS probably pulling on a stock Turbo S. Now the 991.2 Turbo S is getting a few small bumps that could make the race more meaningful. My tune only GTS is faster than my 2014 Turbo S (departed). The 650S will crush the GTS modded in a roll race. Its just the faster car.




For your 0-200 my guess would be a tuned GTS and the Turbo S would be close and the 650S would walk away. The Turbo S would get out in front but the modded GTS would make up ground in the mid sector and come back. The 650S would out launch the GTS and never look back.

Modded Turbo S (no need to add mods to the 650S as the result will be the 650S winning):

With the Turbo S (991.2) having exhaust, manifolds, and tune it will beat the GTS (modded) and the battle against the 650S would be close. The Turbo S would get out of the gate faster and then lose some steam in triple digits.

Last edited by Vic55; Jan 14, 2016 at 01:11 PM.
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Old Jan 14, 2016 | 02:37 PM
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Vic answered in detail the performance questions of your posts and I agree.
The most practical is probably the TT with its back seats, easier in-out and better visibility up front and back.
The best bang for your buck is obviously the GTS. Adding about $15K of mods (turbos, exhaust and tune) will bring you inline with 650S performance.
I am actually waiting for the GT and will probably send it to Renntech for the upgrades. All in it should be at $140K. No point of paying for the extra hp of the GTS if it will get tuned. Patience is a virtue lol.
Reliability wise, obviously a stock TT is the winner (anything goes wrong, the dealer fixes).
The close second should be the GTS as the platform even being fairly new should have no issues with just tune and downpipes. The 5.5TT has not shown any failures so I am hoping the 4.4TT will be the same (after all, half that engine in the CLA/GLA is being pushed to high 300s stock).
The McLaren is the true exotic but at the end will cost you at least $100K more. The new 570S could be a better comparison but will still be low 200s with options. I would take it in a heartbeat over the TTS even though it is probably slower to 60.
The Porsche also looks just too mundane. Most people can't see the difference between a 2 year old 75K carrera and a 210K top dog turbo. That's where the McLaren and GTS shines as far as I am concerned. There are simply rare.
Finally the exhaust note on the TT is just boring whereas the McLaren and GTS makes you giggle every time you step on it or drop a few gears using the paddles.
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Old Jan 14, 2016 | 05:38 PM
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Stock vs Stock (GTS vs 650S) and its ugly but as expected

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Old Jan 14, 2016 | 10:41 PM
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this is a better comparison GTS vs 458 Italia

about even

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Old Jan 15, 2016 | 10:06 AM
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Originally Posted by unpollo2
Except the 458 isn't in this discussion so its just a comparison LOL

But thanks for the post anyways. Too bad there is no cam view from the cars.

Last edited by Vic55; Jan 15, 2016 at 10:08 AM.
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Old Jan 15, 2016 | 08:12 PM
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Question Wow, very interesting...

Wow, nice vids...

So Vic do you think an AMG GT-S with all the basic bolt on mods available (ECU, midpipes, cat deletes, downpipes, etc.. etc..) will hang with a 650S coupe or maybe even a 675LT coupe? Also wondering what will happen when Weistec starts offering upgraded Turbo packages for the GT-S or possibly making the engine bigger also, that could change the game when you take the 4.0 liter engine and push it out to over 5.0 liters or more...that with bigger turbos's and now we're talking over 1,200 horsepower perhaps?...

And, a modded 650S coupe do you think would then be in the performance range of the new Ferrari F12 TDF coupe or Aventador 750 Super Veloce? I've heard that a 650S coupe with all the bolt on's added will run with a Porsche 918 or even the P1....I've never seen a race like that so i have no idea....

Also, do you think a used 650S coupe would be as reliable as the other cars? It looks like very few cars can hang with the 650S unless someone is driving the new 488 GTB bi-turbo....for the cost though of a well optioned brand new 911 turbo S a customer could buy a one year old 650S coupe.....just some thoughts.....damn I wish I could upgrade from my car right now.....one day
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Old Jan 15, 2016 | 08:28 PM
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Originally Posted by SL65amg
Wow, nice vids...

So Vic do you think an AMG GT-S with all the basic bolt on mods available (ECU, midpipes, cat deletes, downpipes, etc.. etc..) will hang with a 650S coupe or maybe even a 675LT coupe? Also wondering what will happen when Weistec starts offering upgraded Turbo packages for the GT-S or possibly making the engine bigger also, that could change the game when you take the 4.0 liter engine and push it out to over 5.0 liters or more...that with bigger turbos's and now we're talking over 1,200 horsepower perhaps?...

And, a modded 650S coupe do you think would then be in the performance range of the new Ferrari F12 TDF coupe or Aventador 750 Super Veloce? I've heard that a 650S coupe with all the bolt on's added will run with a Porsche 918 or even the P1....I've never seen a race like that so i have no idea....

Also, do you think a used 650S coupe would be as reliable as the other cars? It looks like very few cars can hang with the 650S unless someone is driving the new 488 GTB bi-turbo....for the cost though of a well optioned brand new 911 turbo S a customer could buy a one year old 650S coupe.....just some thoughts.....damn I wish I could upgrade from my car right now.....one day
A lot of speculation on our parts but I do not think a full bolt on GTS will keep up with a stock 650s (I didn't say that below did I?) and no way with a 675LT stock. If the GTS has modded turbos then maybe but again I have not seen any real GTS numbers with modded turbos except for save one or two races. The 650S is a rolling car beast in oem format. Forgot about bringing the 675LT in the mix, its a junior P1.
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