AMGTTV8

best one of the night was #2 of 3 runs...

Gorgeous evening = big crowd.

Impressed with the results for first time out and only 500 miles on the tune.

Need to work on my 60'.

There's at least a 1/2 second left here for me to gain with proper launch and stickier tires.

Can't wait to get rid of these 265s.

Super impressed.

Time to put the kids down :-)

AMGTTV8

Btw this was with race start, car short shifted to second after wheel slip off the line...this thing is a beast.

ShazV6

Geez! Work on that 60' and you will definitely be in the low 11'z. She is hauling *** AMGTTV8! Any videos?

Iceman II

Wow bro....great times. And this was with a simple ECU tune -- everything else stock?

AMGTTV8

Yessir!! And as to videos, yeah, only if you want to see me scrub my tires before lining up....this is the second track related day in a row now where this gopro hero 4 that I bought keeps freezing and cutting off the recording after only 30 secs...I'm definitely calling them tomorrow. I didn't spend the money I did to keep on having this happen...it's constant!


Correct...stock pressures, everything.

Kudos to Eurocharged for the hard work.

betrezra

Solid!

That is pretty deep in the 11's for stock wgt/tires/etc...... no goofy ice-chest water coolers with water pumps in the trunk A legit 11 sec street car all day long.

Sticky tires good weather...... low 11's.

irablumberg

That is a really good E.T., particularly given that with practice and better tires, you should be able to trim another .1 to .2 off you 60' time.

However, I am confused about the trap speed. With that E.T. and the limited traction, I would have expected a trap speed in excess of 122. Did you feel any drop off in power at higher RPMs?

Any other thoughts on why the trap speed was not higher?

Thanks for being a pioneer ;-)

AV1

Well done !


Definitely a low 11sec everyday car with better traction - awesome !!!

g-f

My thoughts exactly. It traps just like a regular w204...

Bespoke88

this car should be trapping 122 or so with those times

AV1

It's due to the torque characteristics of the M177 vs M156 if your comparing 204 and 205.


Quick E.T's with a corresponding somewhat or seemingly low terminal speed are common to high torque output powered vehicles.

Will617

Thanks for sharing
It looks like you must have had a lot of wheel spin to get that time with its corresponding speed. You start spinning the tires it will make the track shorter to get the speed up. The 11.7 is impressive though, that thing is a rocket. With a better launch you should be able to get into the 120's with no problem.

betrezra

Might be heat-soak on the top end, killing HP up top, pulling timing?

The E55 guys in stock form suffer from this on the quarter mile. Aftermarket cooling is their fix, or better bigger water pump........ and better DA/amb temps.

What was the amb air temps on these runs?

would be nice to have some DATA...... AFR's, AIT's, timing, boost........

g-f

Or AWD cars or/and cars with fast double clutch trannies. Quick ETs but relatively low trap speed.

But in this case it's a Eurocharged tuned C63S, not a stock one. The time is good, the trap is stockish.

JPMBenz

Your not the only one who ran at the track last night.

AMGTTV8

Totally agree...some of the guys ask below as well so I'll expound here but without trying to make excuses for the result, here's the reality of some of the inputs that led to the result at hand:
-only about 300 miles on new tune...not sure that everything is fully learned and adapted at this point, especially above 70 MPH.
-air temp about 85 degrees
-stock tires, no pressure adjustments...running about 42 PSI
-used launch control, which means ESP was in Sport+ and the car spun once off the line and the torque kicked in....power was pulled, car short shifted to 2nd and on we went.
-3/4 tank of fuel
-track prep was minimal at best
-my first time in this car on the 1/4

Everything considered, I think she ran incredibly well...my first run was done with the car starting in 2nd gear with ESP fully off....that yielded a 12.787 @ approx 118 MPH...if I ran a second faster at the same speed, if I get all of the pieces together, this thing has a lot of time left in it if my logic is correct.

Need to start a tire fund

Most welcome and see above for the balance of your questions but no drop in power whatsoever...this thing pulls like a damn freight train in ANY gear.

I would really love to run this thing in a 1/2 or full mile.

The tuned supercharged mustang 5.0 I ran with I destroyed in the last 1/8 mile...AMG did their work here.

Yessir and thanks!!!

Agreed, if not more

Yup

See above but I don't think heatsoak was the major issue this car keeps so cool under all conditions it's insane...nothing like the 204 even with these turbos...the fan upfront is 1000W....

nice!! how'd you do?

betrezra

Heat soak is not related to engine coolant...... it is related to the intercooler coolant getting HOT under full boost on a full 1/4 mile run..... so much so that on the top end the car senses a HOT air charge and pulls timing.......... I'm just adapting what the E55 boys deal with..... you will have to data-log to see if this is happening........ a simple real time OBDII reader showing timing during the run will tell something.

IN any case I'm not being critical..... quite impressed for a stock trim/tuned cars.

irablumberg

After all the cooling issues with the W204 C63, if AMG designed an intercooler system that cannot keep up with 12 seconds of full throttle full boost, I will be mighty disappointed.

Based on the 1/4 mile results from the GT-S, it appears that the GT-S trap speeds are very consistent with its mid-11 second E.T.s. Let's hope the C63S got an equally good intake design.

J_Maher_AMG

THIS.

The 60' time is perfectly reasonable given a RWD platform with high torque levels. 1.9s is almost as good as us CLA45 guys with AWD.

I'll be honest, with how his original post about how "supra" like the C63 is with this tune, I was expecting a 122-125 trap speed. Especially given the decent 60' time.

Traction isn't a huge issue here with that 60' time, seems like the car is running out breath on the top end. Was it suffering from bad heat soak maybe???

xr750

Who did the tune and what are the results? Sorry if i might have missed that in the thread

JPMBenz

Eurocharged did the tune as the thread title states. It simply takes practice and slight adjustments. Lower your tire pressure, make sure your AMG suspension is in comfort and run with a 1/4 tank of fuel or less. Great job.

Jones2012S4

AMGTTV8,

Did you happen to inquire with euro-charged as to whether they offer a file for race gas such as MS109?

I'll be honest, I was expecting a higher trap speed as well. Not sure what the DA was for this run but my S4 with a DA around 800 ran 11.53@121 with a 1.667 60' this is on race gas mind you and full bolt ons, etc... Estimated at around 550CHP...

1.9 60' is not bad at all for a 500+ LB/FT Torque car that is RWD. Short shifting hurts.

AMGTTV8

I'm going to be honest some of you guys are being way too intense here.

This is my pleasure not my job.

I'm not a pro, and didn't represent the performance as the cats' meow...

This was all simply a trial and error run and I thought I would be nice and share those baseline results.

betrezra

AMGTTV8 - LOL. You mean you don't test drive cars all day long for a living ?)

thx for sharing....... and my time will come when I finally get some runs in mine.

Oh.. can you share the track temperature, and the elevation change of the track from start to finish? (JK).

PeterUbers

Nice run, the car is about 12.1-12.3 stock ...the tune got you down 3-4 tenths

And you had fun