Vitesse Throttle Controller - Wow!
Instructor
Joined: Jan 2015
Posts: 130
Likes: 12
From: So Cal
We're trying to figure this madness out. Sounds like a great mod, if it'll work. Does anyone know anything about the wiring differences between the 05 and later models? I can't imagine it being too different... I would think the throttle harness should receive power at the same times...right?
Burning Brakes
Joined: Nov 2012
Posts: 968
Likes: 8
We're trying to figure this madness out. Sounds like a great mod, if it'll work. Does anyone know anything about the wiring differences between the 05 and later models? I can't imagine it being too different... I would think the throttle harness should receive power at the same times...right?
Is that the issue, no power to the Vitesse?
I'd think other similar gadgets, which are powered up at the pedal on the 05, would likely use the same pin out. If the pinout is hot, maybe it's a grounding question. That'd be simple to check, as well. Perhaps Ahmed will provide him the wiring pinout on the plug.
Last edited by J Christensen; Aug 19, 2015 at 09:44 PM.
Instructor
Joined: Jan 2015
Posts: 130
Likes: 12
From: So Cal
I'd agree, power should be uniform through the system, regulated by the PCM needs. Ignition on, system ready. But you know he can check power to the pedal while the ignition is on. Perhaps there is a slight difference which does not power up the pedal until the brake is depressed/car started? or? A volt meter will tell if the pedal is power hot with the ignition.
Is that the issue, no power to the Vitesse? I'd think other similar gadgets, which are powered up at the pedal on the 05, would likely use the same pin out. If the pinout is hot, maybe it's a grounding question. That'd be simple to check, as well. Perhaps Ahmed will provide him the pinout on the plug.
Is that the issue, no power to the Vitesse? I'd think other similar gadgets, which are powered up at the pedal on the 05, would likely use the same pin out. If the pinout is hot, maybe it's a grounding question. That'd be simple to check, as well. Perhaps Ahmed will provide him the pinout on the plug.
Burning Brakes
Joined: Dec 2014
Posts: 959
Likes: 24
From: Los Angeles, CA
Race Director
Joined: Apr 2007
Posts: 14,062
Likes: 602
From: Henderson Nv-Rohnert Park/Sonoma C o. ca/born in NY Rockaway Beach.
I ordered mine the sane day as you, hope I don't have to wait that long...
I wanna get to testing...LOL 
Thread Starter
Pro
Joined: Apr 2000
Posts: 641
Likes: 114
From: Atlanta GA
As to the previous posters comment on how this piece 'measurably' improves performance, I don't think it can be quantified with any metric (hp, tq, etc).
The best way to describe it is if 2 identical NA Corvettes (we'll say 6 spd auto for consistency) line up at a stop light, the vehicle with the Vitesse dialed up 7+ in sp mode is going to most likely have at least a 60 ft advantage. It's pretty remarkable.
Enjoy!!
Melting Slicks
Joined: Mar 2011
Posts: 2,708
Likes: 83
From: Arkansas
What are you trying to quantify with HPT? It's not going to show anything any different as far as what you can log goes.
The computer is getting a manipulated throttle signal. It's doing the same thing with that signal as it always does.. so HPT will show the same things as it normally would if you're trying to compare pedal position vs. throttle blade position.
The difference being that when the pedal is at 10% this device may be sending a 20% signal to the computer (just a random example with made up numbers). The computer is responding to a 20% throttle position the same as it always has. It has no idea anything is any different, thus HPT won't show anything any different.
The computer is getting a manipulated throttle signal. It's doing the same thing with that signal as it always does.. so HPT will show the same things as it normally would if you're trying to compare pedal position vs. throttle blade position.
The difference being that when the pedal is at 10% this device may be sending a 20% signal to the computer (just a random example with made up numbers). The computer is responding to a 20% throttle position the same as it always has. It has no idea anything is any different, thus HPT won't show anything any different.
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...............that's a helluva exaggeration.............
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
It's simple enough to compare the signal going into the device vs. signal going out of the device. Anything different is due to the throttle controller.
My point is HPT cannot see the voltage going INTO the throttle controller, so it won't do you much good if you're trying to see exactly what the device is doing. It, obviously, can see the voltage/signal coming out of it since that signal is going to the ECM.
Burning Brakes
Joined: Nov 2012
Posts: 968
Likes: 8
Burning Brakes
Joined: Nov 2012
Posts: 968
Likes: 8
I didn't say they didn't have data or that one couldn't acquire such data easily. I said you aren't going to see much using HP Tuners.
It's simple enough to compare the signal going into the device vs. signal going out of the device. Anything different is due to the throttle controller.
My point is HPT cannot see the voltage going INTO the throttle controller, so it won't do you much good if you're trying to see exactly what the device is doing. It, obviously, can see the voltage/signal coming out of it since that signal is going to the ECM.
It's simple enough to compare the signal going into the device vs. signal going out of the device. Anything different is due to the throttle controller.
My point is HPT cannot see the voltage going INTO the throttle controller, so it won't do you much good if you're trying to see exactly what the device is doing. It, obviously, can see the voltage/signal coming out of it since that signal is going to the ECM.
I dunno.
Last edited by J Christensen; Aug 20, 2015 at 10:43 AM.
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
The pedal itself is basically just a voltage pot. 0-5V if I remember correctly
This device just takes the 5V signal from the pedal, manipulates it, and sends it on to the cars computer. That is why HPTuners can't really be used to see what this thing is doing.. the cars computer never sees the original signal from the pedal.
(In reality there are I believe two signals that come from the pedal. The computers looks at both to make sure they are in agreement.. as a safety precaution and all)
The "CoW Booster" is a bit of an unknown. There are tables that you can get to in HP Tuners that control how far the throttle blade actually opens vs. where the pedal actually is. However, Chuck claims to not change these particular tables. I'm not even getting into that as I'd prefer to keep him out of this thread.
This device just takes the 5V signal from the pedal, manipulates it, and sends it on to the cars computer. That is why HPTuners can't really be used to see what this thing is doing.. the cars computer never sees the original signal from the pedal.
(In reality there are I believe two signals that come from the pedal. The computers looks at both to make sure they are in agreement.. as a safety precaution and all)
The "CoW Booster" is a bit of an unknown. There are tables that you can get to in HP Tuners that control how far the throttle blade actually opens vs. where the pedal actually is. However, Chuck claims to not change these particular tables. I'm not even getting into that as I'd prefer to keep him out of this thread.
Melting Slicks
Joined: Nov 2010
Posts: 2,626
Likes: 195
From: On the east coast we drive until we die
Now, whether it actually makes the car faster....? Those are test results I'd absolutely be interested in. But all things being equal (which they never are) in an all out race scenario I can't see this unit making your car faster. It's more for driving enjoyment IMO.
Burning Brakes
Joined: Nov 2012
Posts: 968
Likes: 8
I'm not much for SOTP testimony either but what exactly are you hoping to prove from these tests? That the unit is doing "something?" I know you may not want to accept this answer but you can absolutely feel this thing working, especially in the higher settings. SP3 is where I feel it starts to make a difference and from there up it becomes very noticeable. So I don't think testing is really necessary to prove the unit changes the way the throttle responds. All you have to do is try it and you'll know. I can't imagine anyone putting the setting on SP9 and saying the car responded exactly the same as SP0. Now if you're looking for some type of setting v. throttle percentage ratio, then smarter men than me will have to help out there. Perhaps that could be tested somehow and I'd also be interested in those results.
Now, whether it actually makes the car faster....? Those are test results I'd absolutely be interested in. But all things being equal (which they never are) in an all out race scenario I can't see this unit making your car faster. It's more for driving enjoyment IMO.
Now, whether it actually makes the car faster....? Those are test results I'd absolutely be interested in. But all things being equal (which they never are) in an all out race scenario I can't see this unit making your car faster. It's more for driving enjoyment IMO.
I wonder, in a drag situation, if that 1/3rd of a second, or what ever it is, to hit the pedal to the metal, on a Vitesse SP9 setting car, and non-Vitesse car, would make a difference in the first 60 feet, as someone asked before.
I don't drag, so I have no idea, but it seems and interesting question. I know at stop lights now, SP6 and up, with just a 1/4 inch (?) caress, the car is gone before most others are getting through the intersection.
With the Vitesse, the car is just ready to go. My Vette no longer has that 58 Rambler pedal feel.
I'll set it to SP0 for my wife to drive, as her donkeys get scared pretty quickly.
Last edited by J Christensen; Aug 20, 2015 at 03:53 PM.
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,108
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Here's a tiny bit of data for you guys to pick over.
My HPT settings are logging time in approximately .031 second increments, but throw in a .015 increment about 4-5 times per second.
Three passes at the drags that were 1.484 to 1.487 second 60' times with launch RPM between 2298 and 2390 produced a time from partial throttle of 31-33% to nearly full throttle 84-86% of .078 to .124 seconds. The remaining time from the 84-86% to full throttle 88% (it's not 100% in HPT default) took .078 to .092 seconds.
For those wondering why the last 2-4% took so long, it's a deceleration curve that gets programmed into digitally controlled mechanical devices to allow them to stop without crashing and bouncing back. There are acceleration curves that also deal with the weight and ability of the stepper motor to move or stop the device. The throttle plate surface is never at 90* to the airflow, but is approximately 12* "open" (78* to airflow) and HPT reads 15-16% at a 550 RPM idle.
Have fun with that.
My HPT settings are logging time in approximately .031 second increments, but throw in a .015 increment about 4-5 times per second.
Three passes at the drags that were 1.484 to 1.487 second 60' times with launch RPM between 2298 and 2390 produced a time from partial throttle of 31-33% to nearly full throttle 84-86% of .078 to .124 seconds. The remaining time from the 84-86% to full throttle 88% (it's not 100% in HPT default) took .078 to .092 seconds.
For those wondering why the last 2-4% took so long, it's a deceleration curve that gets programmed into digitally controlled mechanical devices to allow them to stop without crashing and bouncing back. There are acceleration curves that also deal with the weight and ability of the stepper motor to move or stop the device. The throttle plate surface is never at 90* to the airflow, but is approximately 12* "open" (78* to airflow) and HPT reads 15-16% at a 550 RPM idle.
Have fun with that.
