No More Throttle Lag
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From: Vancouver, WA
From the site:
This modified signal forces the throttle body to open 'more' than the stock signal at a given pedal position. In effect, the idle-to-full-throttle pedal travel is reduced. This makes your car 'feel' more powerful because a given pedal input produces greater throttle opening. This is especially evident in the low to mid rpm range where most cars spend their time on the street.
I stand corrected.. editiing the thottle body position relative to the pedal position by the throttle tables in no way accomplishes the same thing
This modified signal forces the throttle body to open 'more' than the stock signal at a given pedal position. In effect, the idle-to-full-throttle pedal travel is reduced. This makes your car 'feel' more powerful because a given pedal input produces greater throttle opening. This is especially evident in the low to mid rpm range where most cars spend their time on the street.
I stand corrected.. editiing the thottle body position relative to the pedal position by the throttle tables in no way accomplishes the same thing
Our cars don't have a throttle body. That is, we do, but it is always open 100%, Our 'throttle' is controlled by injection of gasoline and the variable cam position and oil pressure: "the engine is controlled completely by the VVEL system - where the intake timing/lift/duration is varied to increase/decrease to increase or decrease RPM and/or power."
Enough talk about throttle bodies. One of the reasons we have lag is because the DC servo motors and the engine oil pressure have to get those trick lifters/cams into 'racing' position, advance timing, increase duration, all within a split second of stomping the pedal. That's a lot to ask for.
One of the reasons the 'trickery' gizmos work is because they force the VVEL system into think it is always time for racing, and by keeping those lifters up in the higher positions by sending fake throttle/pedal position voltage that is higher than normal.
Then I am confused. What exactly are we actually cleaning in this article if not a throttle body?
https://www.myg37.com/forums/d-i-y-i...le-bodies.html
https://www.myg37.com/forums/d-i-y-i...le-bodies.html
Found a really informative (but long) thread on the sprint booster. The thread presented both side of the arguement and is a very interesting rea although I only skimmed through the whole thing.
Drive-by-wire and Sprintbooster facts - Benzworld.org - Mercedes-Benz Discussion Forum
My question is:
1.) How much wear and tear do you put on the car by essentially "flooring" the car more often using sprint booster (i.e. every passing and lane changing) versus just accepting/living with the lag and flooring it only when you really want to.
I understand it's very much a personal driving style but would the added aggressive from sprint booster make a difference in wear and tear?
2.) What about the redunancy of the fail safe circuit on the car? Will using sprint booster reduce it to a single point of failure?
Drive-by-wire and Sprintbooster facts - Benzworld.org - Mercedes-Benz Discussion Forum
My question is:
1.) How much wear and tear do you put on the car by essentially "flooring" the car more often using sprint booster (i.e. every passing and lane changing) versus just accepting/living with the lag and flooring it only when you really want to.
I understand it's very much a personal driving style but would the added aggressive from sprint booster make a difference in wear and tear?
2.) What about the redunancy of the fail safe circuit on the car? Will using sprint booster reduce it to a single point of failure?
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Joined: Dec 2007
Posts: 2,112
Likes: 4
From: Charlotte, NC
AAAHHH! I hate this misinformation people spread about the VQ37, If you are going to talk about performance enhancements, at least be familiar with how the car works!
Our cars don't have a throttle body. That is, we do, but it is always open 100%, Our 'throttle' is controlled by injection of gasoline and the variable cam position and oil pressure: "the engine is controlled completely by the VVEL system - where the intake timing/lift/duration is varied to increase/decrease to increase or decrease RPM and/or power."
Enough talk about throttle bodies. One of the reasons we have lag is because the DC servo motors and the engine oil pressure have to get those trick lifters/cams into 'racing' position, advance timing, increase duration, all within a split second of stomping the pedal. That's a lot to ask for.
One of the reasons the 'trickery' gizmos work is because they force the VVEL system into think it is always time for racing, and by keeping those lifters up in the higher positions by sending fake throttle/pedal position voltage that is higher than normal.
Our cars don't have a throttle body. That is, we do, but it is always open 100%, Our 'throttle' is controlled by injection of gasoline and the variable cam position and oil pressure: "the engine is controlled completely by the VVEL system - where the intake timing/lift/duration is varied to increase/decrease to increase or decrease RPM and/or power."
Enough talk about throttle bodies. One of the reasons we have lag is because the DC servo motors and the engine oil pressure have to get those trick lifters/cams into 'racing' position, advance timing, increase duration, all within a split second of stomping the pedal. That's a lot to ask for.
One of the reasons the 'trickery' gizmos work is because they force the VVEL system into think it is always time for racing, and by keeping those lifters up in the higher positions by sending fake throttle/pedal position voltage that is higher than normal.
Last edited by RedG37SNC; Sep 25, 2010 at 04:00 PM.
Registered User
Joined: Dec 2007
Posts: 2,112
Likes: 4
From: Charlotte, NC
Last edited by RedG37SNC; Sep 25, 2010 at 04:58 PM.
Registered User
Joined: Dec 2007
Posts: 2,112
Likes: 4
From: Charlotte, NC
Found a really informative (but long) thread on the sprint booster. The thread presented both side of the arguement and is a very interesting rea although I only skimmed through the whole thing.
Drive-by-wire and Sprintbooster facts - Benzworld.org - Mercedes-Benz Discussion Forum
My question is:
1.) How much wear and tear do you put on the car by essentially "flooring" the car more often using sprint booster (i.e. every passing and lane changing) versus just accepting/living with the lag and flooring it only when you really want to.
I understand it's very much a personal driving style but would the added aggressive from sprint booster make a difference in wear and tear?
2.) What about the redunancy of the fail safe circuit on the car? Will using sprint booster reduce it to a single point of failure?
Drive-by-wire and Sprintbooster facts - Benzworld.org - Mercedes-Benz Discussion Forum
My question is:
1.) How much wear and tear do you put on the car by essentially "flooring" the car more often using sprint booster (i.e. every passing and lane changing) versus just accepting/living with the lag and flooring it only when you really want to.
I understand it's very much a personal driving style but would the added aggressive from sprint booster make a difference in wear and tear?
2.) What about the redunancy of the fail safe circuit on the car? Will using sprint booster reduce it to a single point of failure?
Yea that's concerning... if I had one, I definately carry tools to remove it at all times.
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Joined: Nov 2007
Posts: 192
Likes: 1
From: Gilbert, Arizona
Has anyone pulled off the heads to see the condition of the valves? I may be off here but seeing as I used to work at a Euro shop we had problem with a few customers newer 7 series when the last models came out.
They controlled throttle completely by their valves as well, we had a customer who would come in and floor his car and it would take off at a crawl, then rocket forward shortly after, but at low rpm would be dog slow. Keep in mind this was much more extreme then our problem, he would literally floor it and crawl at a 5mph pace until the car hit WOT.
We ended up finding out that the valves would get so gunked up with build up that it would literally gum them up until they could pop themselves open at WOT. As well as the banks 1 and 2 de-synching and causing stalling or weak performance. Eventually BMW themselves warrantied his problem and if I remember correctly told them they replaced the whole top end.
Probably doesn't apply, but just floating it out there for anyone who has cracked open the top.
They controlled throttle completely by their valves as well, we had a customer who would come in and floor his car and it would take off at a crawl, then rocket forward shortly after, but at low rpm would be dog slow. Keep in mind this was much more extreme then our problem, he would literally floor it and crawl at a 5mph pace until the car hit WOT.
We ended up finding out that the valves would get so gunked up with build up that it would literally gum them up until they could pop themselves open at WOT. As well as the banks 1 and 2 de-synching and causing stalling or weak performance. Eventually BMW themselves warrantied his problem and if I remember correctly told them they replaced the whole top end.
Probably doesn't apply, but just floating it out there for anyone who has cracked open the top.
