does a vitese throttle controller help the throttle lag

 

https://www.corvetteforum.com/forums...ercharger.html

 

It doesn't correct it (like a ported TB) but it does mask it by giving you the option to have the accelerator linear. JerryU has a diagram that provides a good visual. You may want to search for that.

 

Thanks, a bit hard to describe in words but theses graphics may help. Vitesse "improved" the slow tip-in the C7 has in Touring Mode. It my case always drove my 2017 Z51 none MRC in Track that had the fastest tip-in. My Grand Sport driven in Touring was slow and I set my Vitesse at 4/5 that was about what I had for 3 1/2 years. With the MRC upgrade I drive in port and Vitesse is not needed.

The Throttle body porting decreases the time it takes the flow rate to increase AFTER the throttle body is fully open! It doesn't occur "instantly." Still can't with a ported throttle body (similar reason you see lightening before you hear thunder) but the time can be reduced!

 

First off I know nothing about engines but I do like to feel the performance when I hit the throttle. I did notice the lag to get up to speed...are you saying if I add a ported throttle body this would help? What brands should I be looking for? Size? And last but not least does this cause any issues with the warranty?

Thank you in advance for your guys' expertise!

 

^^^
https://www.solerengineering.com/ a forum advertizer makes a compelling case. Suggest you communicate with him.

 

The Vitesse solution never made sense to me, but the Soler solution is very interesting and I'm considering.

 

^^^
Depends what drive mode you're in. In Touring it's more like without the Vitesse (or set at 0 from my graph as that is no adjustment.) For me, as I was driving my Z51 non MRC in Track for the Nanny threshold, Steering stiffness, NPP rpm start and more aggressive Throttle. response- more like Vitesse set at 4 or 5. With my Grand Sport before I had the MRC upgrade I was driving in Touring and Vitesse was better. It was like what I was used to for 3 1/2 years.

Now that I drive in Sport it's not needed. I never used what I called the "Boy Racer" setting on Max at 9. Some like that.

 

Jerry you seem like a very smart guy and your input is always something worth reading .

However I think your graph that you keep posting is a bit misleading to say the least .
Basically my seat of the pants experience with V
the vitesee thing is nothing like your graph shows .
There is nothing linear at all about using one of those electronica throttle controllers it actually does the exact opposite of are you eating a “linear “ throttle pedal feel. Also at parking lot speeds I got A fair amount of stumble and jerky experience with the vitess set at 4 or 5 like most guy seem to like. They simply don’t correct the real problem .

From my experience a ported throttle body is the only thing that has Created a more linear pedal , and reduced the tip in lag or stumble or whatever you want to call it .

Lots of opinions on here about this stuff but I just see them as being two completely different animals,

 

Yep two issues!

The first is GM and most manufacturers build a slow tip-in, i.e. ~30% throttle pedal provides only ~15% throttle body butterfly opening. That is why not only Vitesse but others are successful selling devices that get ride of the slow tip-in. That graph is NOT one I made, as I note, in fact Vitesse does not provide the graph! It is from another manufacturers device but the labeling is partly my observation from driving my 2014 in mostly Track Mode (it was a none MRC so no issue with ride quality) I had the maximum throttle response offered by GM.

Vitesse states when set mid way, 4 or 5 their device provides a linear pedal to throttle butterflies response so that is what I show and found. I tried 9 and it's more like that top line. Also comments from many forum posters make me say it's like Boy Racer! Note all setting at 100% Pedal are 100% throttle- it's just how they get there. Many posts saying it's effective as IMO it is to REDUCE THE SLOW TIP-IN BUILT INTO THE C7 IN TOURING MODE.

When I got my Grand Sport I was driving in Touring to get a ride similar to what I had with my none MRC Z51. Sport was stiffer (validated by comments from Tadge!) Particularly from a stop that slow tip-in was NOT what I was used to. So added the Vitesse and it accomplished what I wanted. I was able to set it up so it was similar to my 3 1/2 years driving my Z51.

When I got the MRC upgrade I now drive in Sport where the GM tip-in is faster (see tables below from the Owner's Manual. I don't need the Vitesse and in fact don't use it!

Bottom Line: Vitesse and similar devices do what in the C7 does depending on drive mode, but adjustable in any drive mode!

The Throttle body mods decrease the time it takes for the air flow to reach max flow at WOT after the butterflies are open. Not by a lot, as the Katech graphs shows for an LS3 0.028 seconds. But that is perceptible.

PS: I never had a stumble or problem at slow parking lot speeds. There was info about an issue with the variable resistor not being properly connecte to the **** on some units! It affects calibration. If you want to contine to use it, suggest finding those posts or sending your unit back to be corrected.

 

This is why I removed my Vitesse. I realize most do not seem to experience this, but it really bugged me. Recalibration did not help. (By the way, if anyone is interested, I switched to Sprintbooster like I had on a previous car. I think they build in a little tip-in. At least the graphs look like they do. Anyway, no problems at slow speed anymore)

 

Jerry Here again you post another graph which to me is completely useless .
Wile driving my 2018 m7 z51 There is absolutely no difference in Throttle response between tour , sport or track. Absolutely none that I can detect.

Is is that graph only Applicable to A8 cars or mag ride cars???

 

Interesting good to know ! Seems like guys with M7 cars experience more of these low speed surging issues

 

Hmm, no way. It is from the C7 Owner's Manuals for all cars. I have an M7 and definitely felt the difference in my 2014 none MRC Z51 as well as my Grand Sport with MRC.

 

Really? I didn’t notice any difference in My base stingray either.
At the dragstrip 60 ft times between tour and track mode were literally identical.

If it actually changes throttle mapping it’s a incredibly small amount cuz I don’t feel it!!!!!!!

 

Arggghhhhh... you guys are killing me...

1.) the throttle pedal is not connected to the throttle body. It is electrically controlled. Drive by wire. Think of the pedal as a rheostat. It starts at 0 and goes to 100. How it gets there is is issue.

at the drag strip, you aren’t easing into to pedal, trying to move with traffic. You mash the gas and rip.

the problem with the stock mapping is in traffic. Pulling away from light behind a slow car.

i had to use a lot (relative) pedal, to prevent stalling m7. It the 30% pedal = 15% throttlebody.

Once moving its really not not an issue.i installed the Vittesse to cure the throttle tip in. Set to 5, it doesn’t exhibit the stalling tendency. There is zero stumbling.

perhaps a ported throttle body would do the same thing, more air flow at small openings.

 

That is about my experience. The throttle body mods are mostly a factor after tip-in has occured.

A bit hard to visualize but after tip-in the air flow still takes a short time to reach max flow. Has to do with the reverse pressure wave from the intake manifold traveling back out. It relates to pressure waves only being able to travel at the speed of sound. By making a converging/diverging entrance and exit shape that speed can increase. Like the Katech graphs show, it can reach max velocity 0.028 seconds sooner in that LS3 throttle body.

 

If your on OEM MPSS ZP tires you absolutely are easing into the throttle and featuring the clutch. and um yeah i think i understand there is no throttle cable HAHAH! thanks though.

I think i made my point.....the OEM throttle mapping between tour ,sport, track is not something i can't detect and must be very minimal at best. perhaps its more obvious in a A8.

 

I have used the Vitesse product in two SS Camaros and now a 2019 Grand Sport. It is a super yet pretty low cost mod that provides much more instantaneous throttle response and increases the enjoyment to the driving experience! Much better bang for buck than a CAI, in the pure actual seat of your pants feel! Does it add HP ? No it does not but it absolutely wakes up the response to the car and acceleration feel is night and day even on just setting #4 or 5 of 10 settings. I do not think you will regret buying it and furthermore you will ask yourself why did Chevy do a terrible tip in setting from the factory? Please, no dopey responses to pressing the gas pedal harder on the stock set up...it does not compare to the actual driveability change you notice!

 

Have you tried a ported TB?

Both item's have a 30 day 100% money back deal. why not try both before endorsing one or the other.