Petakii63

My gut feeling is the dealer you went to didn't tune your car... Even if the tune was weak and only managed half of what eurocharged claims... you should still trap better.

jrcart

No worries. So many variables in play here it could be anything, tune related or not. Glad to see you are on top of it though. You guys are one of the few good tuners remaining out there so OP should rest easy.

loungn14

I am leaning that way as well....as it should be a night and day difference

he had it done at a dealer



agreed! We will make sure it's right!

Ingenieur

How can he tell the tune took?
Other than going >155 mph lol
Rev over 4000 rpm?
More aggressive downshift?
Others???

MikeTc63

Jp autowerks shrewsbury nj

Petakii63

It's kinda difficult to tell, unless you have had enough seat time with your car in stock form. But, a few WOT runs would be able to confirm so difference. Plus, the increased throttle response and harder shifts.

Overrated

More power would yield a higher trap speed and lower ET.

His trap is lower than stock... that means less power.

SaphGreyC63

Went from a nonPP (451hp) C63. Had the car for two years like this. Put the V5 tune, after driving it for an hour, I could tell that after 2000~ rpm there is a surge of more power there than there was before.

Definitely could tell. Especially nonPP to tune.

CarHopper

We already went over this. That was my mistake. I was looking at the times and not traps. After all, it is plausible to have more power and be slower. But, as mentioned over and over, you'll trap higher.

Anyway, this should be a simple case of the car simply wasn't tuned properly.

AMG Boost

I would say possible that you dont have the tune properly installed. With tune you should notice more power after 5000rpm as well as harder shifts.

avery.whss

Well...does it go 280km an hour in about <15 seconds? If so..it's tuned..Not sure why you wouldn't just use the handheld and tune it yourself..takes <3 minutes

Downshifts will sound like this also on V5, also theres 0 wait time, the second it's done writting is when it's tuned.

CarHopper

Avery. I'm uh, going to need a minute.

Do you have headers?

avery.whss

not yet...ordering this week, thats someone elses V5 C63..mine sounds basically the same on downshift, i have 2nd cat delete

Ingenieur

175 mph in < 15 sec???
The stock car takes 23 sec to only 150

avery.whss

depends on the road/conditions/how you start...i hit 200km in 8-9 seconds ..i've hit just under 300 in around 20-ish, mine isn't stock though ..i should have said <20 seconds..would be more realistic for most

Thor2j

I had the exact same problem my 13 coupe. I took it to a very high end tuner near me just to use the dyno because I really couldn't feel a difference. Guess what, no difference with tune or without except the speed limiter had been removed. Talked to eurocharged for hours, refreshed 10 times, shop tried flashing. Always seemed like it took but never changed the ecu.
Eurocharged admitted there a certain cars that for some reason will not program. They gave up and we're nice enough to give me my money back. Ended up taking it to renntech. They programmed it out of the car and dyno tuned it with no problem. Looks like u have one like me that doesn't like the handheld.

AMG Boost

I think that car in the video has headers...



Ughhhh need headers now lol

CarHopper

^ It just has to. That is loud, sexy, and I must have it.

avery.whss

mine sounds that loud with just a 2nd cat delete..all depends how high the RPMs are when you downshift..1st gear downshift is very loud

jrcart

Trust me a tune only C is not going to go 175mph in 15 seconds, hell no C with any amount of mods will go 175 in 15 seconds. I was running both my C(790whp) and SLS(700whp), both of which are supercharged at a 1/2 mile airstrip event this weekend and my C was only going 158 in about 15 seconds and my SLS was only doing 169 in about 14 seconds.

CarHopper

^ Haha "only 169"

Ingenieur

Slugs
Those cars couldn't even get out of their own way
Rolling road blocks

jrcart

I ran my 790whp Weistec Supercharged C BS in the Michigan Mile last year and went 314KmPH/194mph and it took well over 20 seconds. I will look on You Tube for the video.

A tune and header only C63 would take probably close to 30 seconds to run a 1/2 mile

Ingenieur

What if the road is 30% down hill grade and run in a vaccum?
And start timing at 100 mph???
Lol

jrcart

I could not find the video of my car at the Michigan Mile but I beat this GT-R, he took 4th place and I took 3rd. In this video he goes 302KmPH which is about 187mph and it took him about 26 seconds from start cones to finish cones. So no way is a tune only C63 doing it in 20ish seconds.