Amg63-

127 trap speeds are good, definitely should be getting better than 11.5 ET

did you try any runs without brake torque just to compare?

how exactly are you launching it?

you should be low 11 or high 10s

ive been wondering how much time may be lost with mash and go vs brake boost launch.

Ralcbah

Tried runs using brake torque and RS. Didn't do mash and go this time. Best run was using Race start this time, but it did bog. I've found that if you launch the car using Race start and launch it as the rpms rise it won't bog near as much, but messed up on this run, and didn't catch it at right time.

Launching at around 2100 rpms, which may be a bit low. I'm either too low or the ECU freaks if I go much higher than that. Need to find that sweet spot.

Mike450

127 is 10.7's with a 1.6 60' time.

That's a moving trap for your mods. Very nice.

Ralcbah

Yes, sir. Happy with the trap speed; now need to get some seat time and get better. Also need to log some data...Proper device in car now and ready for next track day.
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Fairbird

not sure about that statement

Amg63-

if he could improve the launch we might even see a 128 in there.

I have the same tune and can confirm its got really aggressive power delivery.

i don't think it will ever hit 10.7. I think 10.9-11.0 is more likely on this tune. Still very good.

Amg63-

just try one pass without brake torque/RS , just ease into gas first then nail it. This helps eliminate some of the lag off the line. It's not fastest method but will be easier to do, and a starting point.

i think with this you will get low 11s

Mike450

10.7/10.8 ...

Fairbird

I doubt this is stage 1 car .

Ralcbah

Will give that a shot. Would be awesome to see something low 11s.

Mike450

It's not, it's one of my cars that's not a MB, but my point was, if he can pull a 1.6, with a 127 trap, he'd be in the 10's.

His car is booking it on the back 1/8 and making some time. Tweak that 60' and he'll be there.

Fairbird

not with stage 1 , not with benz . every car is different

Mike450

Understood, that why I said "if" in that post... 1.8 to a 1.6. I'm not proposing he cut a 1.4 from a 1.8

AKnight55

Moving

Amg63-

the only problem is the torque limitations in first gear are preventing that 60ft from being as low as it needs to be for solid consistent 10s.

So so with this car because of the torque limits in first few gears you end up with a trap speed that is usually higher than what it should be for the ET it does...

definitely the absolutle most annoying thing about this car, I hate that it does this ****.

Mike450

So I have been hearing. What tire type are you running?

Regardless, still a smoking fast Benz.

Amg63-

just the stock pzeros but I'm 4matic so I don't think tires will make much of a difference for the 14+ cars.

Amg63-

I wonder what your trap speed is without the mix of 100 octane.

Does the EC tune give more power with that or is it tuned for max power on only 93 octane fuel?

Ralcbah

If I attempted to answer that question, it would be pure speculation. When I sent my ECU in I noted I run 93 octane on street and 100 for track. Getting custom dyno tune Saturday; will report back then.

ced357

You might have mentioned this, but what tires are you running? My 2014 CLS63 with renntech tune and new spark plugs ran 11.2 while running PSS. I threw on Toyo R888's for another run and dropped to 11.1. Maybe try a stickier tire?

PeterUbers

there is SOME wheel slip but unclear if it is significant in the measure of 60ft and 1/4 mile and ET

Ralcbah

Running Pzeros presently. May try to find some stickier rubber when these are done, which I'm sure will be soon. Thx!

Amg63-

Will be interesting to see if your custom dyno tune will yield any more power than the stage 2 EC tune.

EC told me they only increased torque output between stg1 and stg 2 because turbos on stg1 already maxed out on horsepower (about 600-610whp without DPs). Now i do wonder if using 100 octane vs 93 on this tune will give a bit more power.

They said if i were to do a custom tune it likely wont make much more than the stg 2 as its already maxing the engine potential safely.

I think between custom tune and 100 octane you can squeeze more out.

ced357

Its definitely worth a shot as I did notice a difference with my AWD CLS63.

Ralcbah

It will be interesting to see; agreed. My car has other mods as you know, which may provide a platform for more power to be made on my specific car via some real logging and minute changes. Either way, will be fun, and just getting car set up before installing the meth/water injection kit next week. May do some remote tuning changes after install of kit.