REV holding???
Thread Starter
Instructor
Joined: Jan 2011
Posts: 219
Likes: 83
REV holding???
So I was always annoyed with the "rev holding" in my C7Z. And not just "rev holding", but during a hard acceleration through a gear....when I let off the throttle, I swear it holds throttle to maintain that rpm for maybe 1-2 seconds.
It WAS an annoyance, and now with 800hp at the engine, it feels downright dangerous. Is this easy to get rid of with a tune?
The shop that did all my engine work put a perfect tune on the car, but I forgot to bring up this issue. Is it easy for the them to tune out this "massaging" of the throttle?
I know I might get some "but that's also dangerous" comments....but I would like a tune where the position my foot is on the go-pedal is precisely what is given to the throttle body. Just like the good ole days. When my foot is at 100%, the throttle body is at 100%....as soon as I let off, the throttle body snaps shut. So exactly like a cable-driven throttle body. It's what I'm used to....and on the track road course, it's exactly what I want. I take my time to learn the engine power, and finesse the throttle with my foot. I don't want to be guessing / fighting with the car as to where it's going to put the throttle.
Thanks in advance for any advice!
It WAS an annoyance, and now with 800hp at the engine, it feels downright dangerous. Is this easy to get rid of with a tune?
The shop that did all my engine work put a perfect tune on the car, but I forgot to bring up this issue. Is it easy for the them to tune out this "massaging" of the throttle?
I know I might get some "but that's also dangerous" comments....but I would like a tune where the position my foot is on the go-pedal is precisely what is given to the throttle body. Just like the good ole days. When my foot is at 100%, the throttle body is at 100%....as soon as I let off, the throttle body snaps shut. So exactly like a cable-driven throttle body. It's what I'm used to....and on the track road course, it's exactly what I want. I take my time to learn the engine power, and finesse the throttle with my foot. I don't want to be guessing / fighting with the car as to where it's going to put the throttle.
Thanks in advance for any advice!
Racer
Joined: Mar 2020
Posts: 458
Likes: 428
From: Atlanta
i upshift with the paddle immediately to bring the revs down, even in automatic mode, the paddles shifter will upshift to a higher gear and stop the revs
Last edited by Mrchen; Feb 21, 2024 at 02:09 PM.
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
So I was always annoyed with the "rev holding" in my C7Z. And not just "rev holding", but during a hard acceleration through a gear....when I let off the throttle, I swear it holds throttle to maintain that rpm for maybe 1-2 seconds.
It WAS an annoyance, and now with 800hp at the engine, it feels downright dangerous. Is this easy to get rid of with a tune?
The shop that did all my engine work put a perfect tune on the car, but I forgot to bring up this issue. Is it easy for the them to tune out this "massaging" of the throttle?
I know I might get some "but that's also dangerous" comments....but I would like a tune where the position my foot is on the go-pedal is precisely what is given to the throttle body. Just like the good ole days. When my foot is at 100%, the throttle body is at 100%....as soon as I let off, the throttle body snaps shut. So exactly like a cable-driven throttle body. It's what I'm used to....and on the track road course, it's exactly what I want. I take my time to learn the engine power, and finesse the throttle with my foot. I don't want to be guessing / fighting with the car as to where it's going to put the throttle.
Thanks in advance for any advice!
It WAS an annoyance, and now with 800hp at the engine, it feels downright dangerous. Is this easy to get rid of with a tune?
The shop that did all my engine work put a perfect tune on the car, but I forgot to bring up this issue. Is it easy for the them to tune out this "massaging" of the throttle?
I know I might get some "but that's also dangerous" comments....but I would like a tune where the position my foot is on the go-pedal is precisely what is given to the throttle body. Just like the good ole days. When my foot is at 100%, the throttle body is at 100%....as soon as I let off, the throttle body snaps shut. So exactly like a cable-driven throttle body. It's what I'm used to....and on the track road course, it's exactly what I want. I take my time to learn the engine power, and finesse the throttle with my foot. I don't want to be guessing / fighting with the car as to where it's going to put the throttle.
Thanks in advance for any advice!
It sounds like what you're describing is "throttle hang" but then you mention wanting the throttle to reflect gas pedal position. While related, these are two different things so you'll want to be very descriptive with the Tuner.
Thread Starter
Instructor
Joined: Jan 2011
Posts: 219
Likes: 83
If the tuner knows what he's doing regarding driveability, it's fairly straight forward. If he's a "WOT only" type of tuner....it may or may not be easy.
It sounds like what you're describing is "throttle hang" but then you mention wanting the throttle to reflect gas pedal position. While related, these are two different things so you'll want to be very descriptive with the Tuner.
It sounds like what you're describing is "throttle hang" but then you mention wanting the throttle to reflect gas pedal position. While related, these are two different things so you'll want to be very descriptive with the Tuner.
I will talk to my tuner to see if they can do a "1 to 1" mapping of accelerator pedal position to actual throttle position...
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
There is a table that addresses "Max Area", but really what that does is establish a limit.
Then, depending on what's been done to the engine you can start to get into other tables and settings.
Long story short, it can be really easy or it can take some time to address customer desires.
