SonnyakaPig

Don't trip. My car has bogged on launch too. I have street tires. And I've never tried loading up the converter higher than 1600 rpms.

Edit: I forgot to add, it was probably due to driver error.

MB_Forever

First you said, you'd beat his time 100% stock but you failed (all you could muster was 12.6), then you said you'd beat his time with a tune but you failed again (12.1 to 13.1 - all over the place), and then now you say lets race on the streets (no 1/4 mile) because apparently it's better (for you at least)

You take the term excuses to a whole new level

MB_Forever

Normally, all these factors would indicate that Jon should be quicker/faster but I think in this case, his driving and/or his tune is acting funny despite him saying that it dynos really high and feels really good or whatever. That's why we always say track numbers are the best way to see how your car acts under stress. Also, keep in mind that the E63 software maps are completely different than the C63 so there might be many things hidden and changed in those maps that tuners don't use or even look at. It gets complicated with Mercedes because there aren't too many companies making aftermarket parts for them.

That is very strange.... the E63 and CLS63 don't bog down until after 2600 rpm and only if you're using drag radials or slicks. Normally they won't on street tires. I've launched before at 2000 rpm and have seen the CLS63 and CLK63 BS launch all day from 1600 rpm to 2400 rpm with no problems at all

Do you have a tune?

118E63

Lol,you KNOW how fast the bike is And pray tell,how fast is it?Please...u have NO idea how fast it is

If its not a 1/4mi run what is it?

You never replied as to why you got your buddy w the 850rwhp vette involved,can you answer that please as Im confused?

And while were at it,is oldgixxers babyseat modded car the "new" factory freak,as officially ordained by you since it no longer applies to your car? AWESOME! I'll have to pass the word on...woohoo!!

Jons95c36amg

Thanks at least someone knows what I'm talking about.

SonnyakaPig

I do not have a tune.

I do have Hankook EVO V12 265's on the back. And I would not recommend them to anyone. They suck big time. I hate them.

They are the cause of my wheelhop issues.

But, even on the stock P0's which allowed me to floor the throttle from a standstill with the biggest consequence being the feeling of ice skating all over the pavement (NO WHEELHOP) sorry, I'm just mad I don't have the stock rubber anymore... I still cannot brake stall my car over 1500 rpms, even 1200 to be completely candid, or else it will bog.

Jons95c36amg

Its no brainer the bike will beat my c63. So thats why I brought up the vette. So I will be looking for old gixxer on Sunday put up or shut up!

SonnyakaPig

This must be the answer. Nice response.

I've read auto reviewers say that even though the C63 has a lot of spunk and with the P31 package it's even faster than a regular C63, if you can afford it, the extra power available in the E63 can noticably be felt.

But, I do understand that tuned C63's can beat stock E63's in a drag race. Of course, it's a drivers race.

MB_Forever

A tuned C63 would definitely have the advantage, as it's similarly powered but 350 lbs lighter to begin with. Then add to that some light-weight components which are not (and likely never will be) available for the E63, such as, carbon fiber hood + trunk + front and rear bumpers (coming soon), and it's game over.

118E63

I spoke with oldgixx,if his car is not sold on friday(a buyer is coming from virginia) he will be there with bells&whistles...and before you start with saying he is making excuses,his car has been for sale long before this supposed race between you&him ever came into play as a few longtime forum members can vouch on his behalf

Jons95c36amg

Yes it can beat a e63 in a drag. But on the street the e63 will get raped. It was proven already. I'm talking about a tuned only c63 vs a e63.

Jons95c36amg

Bring your e63 then.

Jons95c36amg

Or any stock e63. End of story.

SonnyakaPig

I know.

I'm more interested in the fact that the larger E63's on street tires can cut better 60' times than the tune-only C63's on street tires.

It could be that the answer lies in the mysterious TCU.

Jons95c36amg

Bingo! The wider e63s tires and extra lbs helps the launch! My tires are 255 in the rear But I still managed a 1.9- 2.0 60ft.

SonnyakaPig

Heavier car's have an advantage at launch on street tires? (we're talking C63's and E63's here, to clarify). I honestly don't know.

My first outing with the car on the Hankooks, I got a 1.903 60' and for sure, without question, I could have been in the 1.8's because my car actually hooked great on that run (no spin) but I didn't expect that to happen so I didn't engage enough throttle until it was too late. I'm sure that cost me at least 1/100th of a second.

I had another run that was 1.977 and I experienced some slight wheel hop on that run and some tire spin. It was a horrible run.

SonnyakaPig

I'm sorry, I initially overlooked this response.

I didn't know this about the front and rear bumpers. Very exciting. Anything to bring the weight down is a good thing.

MB_Forever

It's funny reading those two posts almost back-to-back:



And we've got one more excuse.... now it's the tires

The E63 rear tires are 265.... in my opinion, this won't help the "heavier" and "slower" E63 much - especially going against the super factory freak driven by Jon

hhughes1

It's not just the E63's but the 55's and even Juicee's CLS63 (1.4x).......they all have an advantage with quicker 60's.

The primary reason is the adjustable suspension which they set to the softest setting and raise the ride hight as high as possible. This allows the car to squat when the rear wheels hook with no power lost to wheel hop or spin. This additional flex which has the same impact as running very low pressure in the rear tires allows for smoother weight transfer to the rear upon acceleration and keeps the contact point pinned to the ground as the tire is torqued into motion.

Jons95c36amg

My p30 has stiffer unajustable shocks. Explains why I had a hard time launching.

Jons95c36amg

Like I said its the lbs of the e63 which has the advantage-launch. Keep digging.

dodger63

Explain why I get good 60' my car is at the lowest hardest setting on kws even with stocks on the front I've cut into the 1.6s slammed! You just have an excuse for everything shut up and race

MB_Forever

Juicee's CLS63 and my E63 both have the P30 option and both have much stiffer suspension than the regular version and yet both had decent 60' time. In fact, some of the 60' times in my car are almost the exact same as ones from oldgixxer's car and his car doesn't have the performance package. Similarly, I've seen C63s launch very good with incredible 60' times at the track. It's amazing how the excuses keep piling up.

hhughes1

The difference in the P30 from one C63 to another is just 20% stiffer springs which is really no appreciable difference on the drag strip. My comments are specific to the difference in 60's between different models with completely different suspension setups.

SonnyakaPig

This makes sense. It definitely does.

By the way, when I see Juicee's sig, I marvel at the 60' time. Just amazing.

The 55's I always thought could have an advantage in 60' times because they have extra rwhp and tq. It's true they have more low end power and have the potential to spin the tires more than 63's, but I would think if you can get good and repeatable with the throttle modulation technique, you could ease into the throttle and then click it to the floor when traction is available, and the extra power should compensate for the less aggressive launch.

I know this is just speculation. Perhaps, it is solely due to the suspension, like you said.