W203E35

Well atleast I can beat the 135i on the freeway because the w204 guys told me that the C350 is faster than the 335i on the freeway.

tommy

Wouldn't the 135's lighter weight come into play a little? I'm still surprised that it's not as big of a difference as I thought it should be.

bigben320e

I think after 27 pages, the conclusion is SB is BS?

Perhaps a better spend of my money is on a K1 package or getting quad exhaust on the ride....

zerocover

He's being sarcastic.

Back on topic;
I like the idea behind a more aggressive throttle, it makes the car more fun. That being said I would never spend $300 on it. Could we get the same effect by reseting the throttle and not pushing all the way down?

W203E35

I'm not as concerned about throttle sensitivity as the LAG. There has been times where on the freeway I was stuck in traffic and finally it opened up and I mashed on the pedal and literally a 3 second lag (by lag I mean the car wasn't going anywhere).

I can't speak of the 7G in general but my transmission sucks big time (7G)

Edit:
I was joking about the 135i and C350 on the freeway. The w204 guys say the C350 is faster on the highway..even though I had a little fun against a 335i and was half a car I have a feeling that car wasn't going at it.
The 135/335 dynos at 270-280 the C350 dynos at 225-230 which is a huge difference. I raced a 335i dig and that thing had me by max 6 cars and min 4 cars.

LILBENZ230

Resetting the throttle helps a little but doesn't change the car's build in characteristics.. which include an unresponsive throttle.

the only way a C350 is going to have a snowball's chance in hell against a 135i is if the 135i's driver has forgot to start the engine.

LightDragon

that sprint booster doesnt add hp or tq!!!

tommy

You just love to revive dead threads, don't you?

No one is disagreeing with that. Oy.

turbonos7

Has anyone tried the Gen II lately? Better or worse? What about the different driving modes? Any feedback please...

tommy

My opinion is still what it's been for years here. I still like it, people have weird expectations of what it can and can't do. It doesn't really make much sense from a dollar perspective, but you should be used to that if you're modding your W203.

The switch is a nice feature for when I bring it in for some work, and can turn it back to normal.

Moviela

This is a scam. It is right up there with clamping a magnet on your fuel line, using toilet paper as a "high performance oil filter," adding a few ounces of acetone to your gas tank, and my favorite "Magic beans" you put in the radiator that allows your car to run cooler."

Don't forget to buy a bottle of VX-6 (cadmium sulfate) to "double the life of your battery."

tommy

Please don't sugarcoat it.

turbonos7

Ok.... so I take it you tried it and didn't feel any difference?

BlkBenz8

no actual gains in numbers? not interested.. Why is it soo hard to increase HP in a m272 V6?!?! besides going to schrick and spending about 2k on cams for about 30hp. Damn you mercedes.

turbonos7

Well, it's just that while reading through this forum I came accross the throttle reset procedure which a lot of people claim has made some difference in the driveability of their car, enough to bring back smiles and giggles....but for a limited time, and then you have to do it again... and again... and... again. Then I came across the sprintbooster which sounds like a more permanent version of this "resetting". I agree with you that it may not add any more power than you already have, but if it allows power to come with little to no lag then what's so bad about it?

In my younger days I street-raced ALOT, and if you're performance oriented then you can't help but to think about those times when you may have missed a gear or shifted too early and lost by a fender... something that affects performance without directly affecting power. For some, being able to floor it and go right away makes all the difference compared to flooring it.....2.....3.....4....GO! Get my DRIFT?

sinape62

I installed SB on my 2012 E350 Coupe,.I actually got the ECU tuned by Eurocharged first. I recognized the torque increase with the ECU tune. A few days later I installed the SprintBooster...The throttle response was unbelieveable. There is a pig-tail switch with ~30" wire that connects to the SB unit. The switch has 3 setting: Factory (off- no light), Green light (enhanced), Red (insane). Yes, SB does not increase HP or Torque but it creates a quicker throttle response. My car is totally different. Even throttle response at 60 mph is unreal, passing speeds so quick on the throttle. The first time I put it in Red setting, sport mode, 1st gear with paddles, and got on the throttle...day-am!!! I wasn't ready for it. Threw me back in my seat. I bought my SB on Amazon for 275 USD... Installed it in 30 min. The nice thing also is you can set to factory (no light), disconnect the pigtail from the pedal, that way if you take it in for service or valet, they can't play with it and won't crash the dam thing.

Don't criticize what you haven't tried. It's a good investment.

turbonos7

See... That's what I'm talking about... Real feedback from someone who HAS ONE. Thanks a bunch Sinape62 for your input. I think I just made up my mind. SB...here I come!

SickSpeedMonte

I can't believe people are still buying these things...

Just push the pedal down further and the car will perform exactly the same... why do you want the car to be unpredictable and harder to control? I don't know of anyone who modified their mechanical throttle linkage (for free) to put the cable closer to the throttle shaft and achieve the same result... but you come up with some electrical doo-dad that does that and people will buy it.

I don't have one and I never will... but come on... you don't have to slam your dick in a car door to know it's going to hurt.

Moviela

Please save your money. The device is a resistor that costs all of fifteen cents. All it does is make your throttle non-linear. You can get the same results by pushing the pedal a little farther.

sinape62

Pushing down on the throttle without SB installed doesn't perform exactly or anything remotely to having one installed. You have to have some understanding of this technology. It's binary, not mechanical. Embedded software vs. Mechanical. (Theres a difference). So if your talking throttle cables, you couldnt install SB even if you wanted to. Only works with cars with throttle-by-wire, not on cars with mechanical throttle linkages at the foot pedal.

I know my wife's w203 2005 is throttle-by-wire, but prior to 2005 I dont know the if it is the same or not.

I am not here to convince the nay sayers...just stating the facts since I have one installed and know how it performs. I agree with you and your position, so don't get one.

tommy

I really have no idea why the SB abolitionists get their knickers in a twist over this little thing.

Moviela

I do have an understanding of the technology. It is not "binary." There is no digital communication with the ECU with this device. The pedal has a potentiometer which is a resistor with a mechanical wiper that sweeps from one end of the resistor to the other. The ECU supplies 5 volts to one end of the potentiometer, and ground to the other. There is an analog input in the ECU that is reading the wiper of the potentiometer. The voltage is 0 to 5 volts depending on how much you press the pedal. The ECU uses the drivers pedal effort to change the fuel delivery to the engine.

Inside the "sprint booster" is an analog to pulse width modulation device with a look-up table. The frequency of the PWM waveform is fed to a digital to analog converter. The analog voltage output from the converter is fed to the ECU, which reacts exactly the same way as the analog voltage from the pedal.

Well, not exactly. IC's in the D to A converter are powered by the 5 volts from the ECU. The transistors in the IC have a small voltage drop which means the ECU actually sees a bit less with the "sprint booster" output than when the pedal is directly connected at full throttle.

Probably not important, but the devices used are not temperature compensated, nor is the power supply decoupling adequate for an automotive environment.

So what does it do that has fans so excited? It fools them. If you hold the pedal halfway down the analog voltage is ~2.5 volts. At that same position the "sprint booster" output is ~2.8 volts. You are thinking "my car is so much faster now with the same pedal effort." If you were to press the pedal down a little further you would get the same result.

Inside the device is a small circuit board a few capacitors and resistors and a couple of IC's. The value of those parts is about a buck fifty.

How much are they asking for the device?

P.T. Barnum said there is a sucker born every minute. Don't be a sucker.

sinape62

Costs $1.50 more than you're willing to pay evidently, so don't ask. Fact: if you don't have one how can you say it the same if you just press the pedal down further?

C class wagon? (no further comment)

JamesC32

I put one on my car and it feels great!!, they should have made the throttle that responsive from the factory, you got to get use to barely touching the peddle though if you don't want to burn out,, I got used to it though and really like it!!, girlfriend hates it when she drives it, throughs her back every time she takes off

Redneckgearhead

Throws her back? How much power you putting down?