TexasBenzBandit

But only in the top end in certain circumstances. I love the car and haven’t had it long or done much highway driving.

I was driving in Comfort (usually do when I’m just driving normal) and I was on freeway going 75-80 in 7th gear obviously. I floored car, and it had no power barely. It still climbed up past 100mph but it just felt weak. In understand it’s not going to skyrocket my head back, but for a V8 just seemed weak.

Im sure if I downshifted it would have been fine. I noticed this also other times when I am already going fast (60,70,80) at a steady speed, and then I FLOOR it.

Also, my car had the Stock Tune on it for now. But my Stage 2 is about to go back on.

I’ve heard people talk about running out of OOOMMMPH on the Top End in these cars, but is this normal?

Schulminator

Very normal...the small factory turbo chargers run out of steam up top...

amg8

Wait, I am not understanding something. Why would you floor it and keep it in 7th gear and expect it to pull? That's like lugging the engine.

14RS5

I spend most of the time in comfort mode. Sad, I know. But, even in that mode my car just jumps from 75-80 to 120+. I had a guy pull in behind me on the highway and flash his brights (he didn't like my merge onto the highway). I hit the gas and saw the speed pass 135 in a very short time. Running in Sport and Sport + it's even quicker for me.

superswiss

Is this a serious question? I'm not quite following. 7th gear is an overdrive highway gear (0.73:1 gear ratio). Anything less than 1:1 is an overdrive gear meant to save fuel. Both 6th and 7th are overdrive gears. For the 2019+, 7th, 8th and 9th are overdrive gears. What exactly are you expecting to happen? One stays in overdrive gears to keep the revs low and mpg up for highway cruising and fuel efficient driving, not to accelerate as fast as possible. The wheel torque is the lowest in those gears. The turbos run out of steam at the top of the rev band. That's common because they are relatively small in order to have low inertia and a fast response, but that doesn't seem what you are getting at. I can tell you that this car pulls like a fright train all the way to 180 mph, but you've got to be in the right gear. Also do you have the S or non-S. The S has a bit more HP which will be felt the faster you are trying to go, and I believe the non-S is limited to 155 mph. I just came back from 2 months in Europe with my '19 C63S and this thing went like a bat out of hell on the German Autobahn, rapidly gaining speed with very little effort. I quickly reached triple digit speeds and beyond with only partial throttle.

Tuxdude

With the 2019 C63S, it's been hard to not accidentally hit speeds above 90 mph from 40 or 50 in matter of seconds when trying to squeeze between cars and perform lane changes. This was in Comfort mode. I haven't tried pulls in 100+ yet.

The car automatically shifts down gears even in Comfort mode from what I've noticed the moment you step on the gas pedal with zero visible lag.

skim7x

Comfort mode not meant for speed bro. And why are you running around with stock tune when you HAVE an upgraded tune!?

jinnsound2

Were you in manual mode? Should've dropped at least 3 gears?? If You were in manual and just lugging it in 7th of course its not gonna have any jam. Nothing to do with the small turbos. I notice the small turbos more when the car was tuned then Stock because there was absolutely no gain shifting at 7000 with a tune only car, best results are Short Shifting. Is there something wrong with your tune or are you just curious between the how it feels stock vs tuned. If there is a Problem With your tune Please PM me.

BD-C63

Why drive this car in Comfort mode? I hate how the tranny & steering feel in Comfort. Live a little and bump up to Sport, or better yet, Sport+!

TexasBenzBandit

Im driving 80, it’s an automatic. I floor it. It slowly climbs. I did whatever the computer was programmed to do. I said IF I kicked it down it would have pulled of course but my Heads Cam Vette at 80 takes off like a bat out of hell and keeps pulling. It’s NA and I have a bigger cam. But just an observation. I was expecting the car to take off a little bit but it didn’t have a lot of OOOMPH. I wished it did.

TexasBenzBandit

Ha Ha. Because my bad *** tune which worked great was part of several tunes. One wasn’t loading and it wasn’t my fault. So I was told last Friday to put it back to Stock, delete my files from MyGenius. I thought I’d have the New Tune Files in a few days but Jerry was out of town.

Im praying they are here now in my IN BOX. Going to look. So that’s the only reason. When I get my files I’ll just load them back in MyGenius and put Stage 2 back onto the car.

after having a TUNE car feels so slow (not so slow) but way slower!! Once you have a tune you can Never go back.

Arjy

Sounds like normal behavior in comfort mode. 204 does the same, holds 7th. The torque is enough to pass someone on the highway but thats about it.

superswiss

Are you saying it didn't kick down a few gears on its own? If you floor it at 80 in automatic mode, the kick down should downshift about three gears I would expect. If I do this in my 2019 while cruising in 9th gear and then floor it, it downshifts to 4th in a fraction of a second and takes off (It does this even in Comfort mode). Must be something about the pre facelift that it stays in the high gear or a malfunction.

TexasBenzBandit

Appreciate your response. I’m sure your right. I was just lugging Along 80-85 and pushed the pedal down and floored it. It climbed to 110 but just much slower than I was expecting. That’s all.

My vette at 80,90, pulls very hard so I was just expecting more. My Vette is heavily modified but it’s just a C5.

Man, just checked, No Tunes! I think he was getting back tomorrow, Friday! I bet I get it tomorrow. I am going to CALL as I took of work tomorrow and have time to play

jinnsound2

is your vette an auto 5speed?

TexasBenzBandit

Yes My Vette is a 2001 C5 (I'm the original owner) 38K Miles. It actually has an RPM built Transmission but a 4-speed like stock, a Yank SS3600 Torque Converter, 3.42 gears (stock was 3.15), and every bolt on known to man, AFR Heads, Comp Cam, Kooks LT Headers, NO Cats X-Pipe, Intake, Ported Throttle Body, pulley. Ran many low 11's at 126MPH ish, with a best of 11.19. Sometimes MPH less. I have a video of me running an 11.42 at 122.58 MPH before I did all those mods. I assume my Vette is faster, but now I have Dragy, I need to Test this Out. I haven't been to track since my daughter was born 9 years ago, but had 100 1/4 and 1/8th mile runs.

I AM curious now about my Benz PRE TUNE and POST Tune? Since I'm running my stock tune as of right this moment (hoping tune comes tomorrow), I need to do a Dragy Run to see where I am at STOCK, then see if the Tune makes a difference? What are y'alls GUESS on my average 1/4 mile Time? Car has new tires on it, but they are cheap $100 a tire SUMITO, or some crap like that. They were put on before I bought.

It FELT way faster, but who knows? Also, ANY Advice for testing the car with Dragy? Sports +, Do I use the Race Launch Feature and do I just let it shift itself, or put it in Manual Mode? I haven't been using Manual Mode ALL the time, but I use it to kick down fairly often. Again, only had car 1,200 miles. Finally, to answer someone's question about did my car kick down into a lower gear? NO, when I was going 80-85, at 30% throttle pressure, then pushed the throttle to 100%, it just kept going and climbed slowly. I was surprised how slow it felt, so I tried it again right after that just to see. Maybe if I was at 60 it may have kicked down, OR in Sport or SPORT + (remember I was in C) but Mine didn't downshift.

ShaneN.

did the car kick down any cars when you were in comfort in 7th gear or did it keep the car in 7th? i'd think if you gave it enough gas it would have downshifted for you to at least 5th o r 6th?

TexasBenzBandit

I know this is kind of a silly post. But it just surprised me a little that it was so weak, and NO it stayed in 7th gear.

I was surprised so i so I did it again and same thing again. To clarify I was driving 80+ at a steady pace and then continued to apply pressure and floored it figuring (since I’m new to turbos) the turbos are going to be going fast and it would take off a lot faster than it was.

If if I was in S or S+ I’m sure it would be different.

superswiss

So you didn't floor it all the way. You have to depress the pedal beyond the pressure point in order to trigger the Kickdown.

Cascade1

For some reason when I'm in comfort my 19c63s is in 9th going 35mph.... its annoying. I only roll C until engine to temp then its s+

FLC63s

@superswiss I am defending the pre-facelift :-) , YES when you stomp it at 80 or more, in Comfort/auto , it kicks down as many gears as its needs and pulls like hell ... (stock) now, if you want to say with a tune, I can even break loose the rear end.
(so definitly if his car is not downshifting etc, then I would say " Houston we have problem " )

alexasa

iTrader: (1)

just a means for the OP to talk about his vette on MB forums... all can move along here lol

purplewidow

If you are in an overdrive cruising gear like 7th going 80-85mph and floor it what did you expect? I don’t understand this post. If you are in manual mode it won’t drop gears when using the kickdown.. you have to be in auto mode. If you are going 80 mph you should be in 3rd or 4th gear for max power. How do you have a worked up vette.. been driving for a long time, been to the track 100 plus times and don’t understand how gears work? Why would you try and use 7th gear going 80mph and think you would get max power? Is the next post gonna be about you selling the c5? Lolol

Drisso88

If you honestly floored it and it stayed in 7th, something is wrong. Doesn't matter what mode it is in, it should have automatically dropped to at least 4th gear

FLC63s