Lazz83

My C43 shifts at 6000 under full throttle no matter what setting it is in; Comfort, Sport, Sport +, wondering if they all do this even if the red line is 6500. I feel like I am being cheated out of HP.

If this is the case does a tune raise the rpm shift points?

Thanks

Dieseldan9

iTrader: (1)

According to what I read HP peaks at 6000 then starts to fall off.


I think the idea is by using the 9 speed it keeps the car in the sweet spot for faster acceleration.

munis

The HP peaks in this car at 5.5k to 5.75k rpm. So if anything you are loosing horsepower by shifting higher than 6k.

Lazz83

What if the car is tuned? I think at that point the power band is higher up, either way a car should shift at redline not 500 rpm below it.

RichardCranium3

Also, especially in 1 & 2, transmission will shift before the tach even has time to catch up. Example - try and get a clean run from a dig in manual mode (assuming you've never done it before).

TechnoPatat

In manual mode the rev limitir is at about 6.200 rpm. So I’m affraid the redline isn’t mounted correct. Realy anoying when you’re driving in manual on a track and don’t realy have the time to watch the rev counter all the time !

threefirs

What munis said. You'll be losing horsepower and speed by shifting higher than 6,000RPM. This is also the case for the tuned vehicles - should arguably shift even sooner with a full tune.

RichardCranium3

Having just driven the C43 on Laguna Seca at nearly 9/10ths, I never once thought the car was under-performing by not being in manual mode. When braking was applied appropriately based on the turn, gear selection was next to telepathic. I didn't have a single instance of feeling like I was in the wrong gear.

Lazz83

Then why the hell is the Redline at 6500 Rpm? and I disagree with shifting sooner, you will still be very near peak HP at 6500 rpm it doesn't fall off that quickly. So what your saying is every car should shift right at peak HP? Then why do manufacturers push the redline shift points just past peak HP rpm?

This is the first car that I have owned that falls far short of redline under full acceleration, every other automatic vehicle I've had shifts at the redline.

alexasa

iTrader: (1)

car cuts gas the second you approach the 6500 redline. There is manual mode if you wanna squeeze a couple hundred more rpms out of it.

threefirs

I'm not quite sure what you're arguing here - it can be seen in the dyno graphs. HP starts to slope down after 5750RPM. You can take it to redline all you want but your car will not run the best times like this. I'm not saying this is for all cars, but this is the truth for the C43.

maxxamg

there is a spring under the gas pedal ... press the gas pedal down harder til you hear a click ... and it will shift at 6250 rpm

18bora

I only use manual in the twisties, for straight lines, I keep it in auto; do you think you can shift faster than the computer!

Lazz83

Ok I will give this a try tonight

Lazz83

I'm saying it should just shift at redline like most performance automatic, your correct the horsepower does fall off after that rpm, so it really makes no sense to push it past it.

If it were standard we would all be shifting at 6500rpm, I feel like I'm leaving something on the table, but the numbers show that is not true.

I was just curious if other C43's did this also

Lazz83

Well I took the car out last night and Mashed the pedal into the floorboards and it did in fact shift at 6250 rpm, so thanks for the info

Only problem was I was doing 105mph after the gear change, lol

sean1.8t

Yes, technically hp is declining after it's xxxx rpm peak. BUT, what is the hp at the rpm that you are shifting into? If hp peaks at 3k rpm then obviously you don't want to shift at 6k, but you should be shifting after the engines peak hp rpm. You have to take into consideration both the momentum you have going and what hp you're shifting into.

This trans is no dual clutch by any means but it's entire process of shifting from pulling the paddle to getting into the next gear is pretty damn quick! But god dammit I have run into the rev limiter so many times! Especially in 1st gear since i've been tuned. I have to hit the paddle @ ~5500rpm for it to shift before 6500. I wish that there was an additional manual mode where the computer will take over as to avoid the limiter. It does it on downshifts, why not have the ability on upshifts...

Hmm, I gotta check this out. Thanks for the info.

threefirs

I take back everything I said here - I ran my best times last night running the car in Auto.

Lazz83

I don't like the paddle shift and I feel there is a bit of a delay in the shift from when you first hit the paddle.

What time did you run?

threefirs

My best time was 12.15 @ 113.78MPH