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Sprintbooster Impressions

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Old 08-10-2009, 05:07 AM
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Originally Posted by terente0081' post='970951' date='Aug 10 2009, 07:46 AM
I don't know about manual transmission, but I loved my SB on Auto since day 1. Before the SB I had to press the gas pedal really hard to get the car to downshift and it didn't even downshift all the time so I had to do double gas presses to force it into downshifting. With the SB all I need to do is pinch the accelerator and the car downshifts and surges forward. That's in D mode. In DS is very sensitive and aggressive and in M mode is brutal.
SB on Automatic transmission makes passing a breeze.
Yes that's similar to my impressions. Especially in DS and M mode, you can really buck the car (if you want to or if you are not being smooth with the acclerator).

If only it totally eliminated the lag between application of WOT and full engine power.....

IMHO, this is not a "perfect mod" for the lag problem but it does make it somewhat better. And power really comes on a lot stronger with SB.
Old 08-10-2009, 05:30 AM
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Originally Posted by terente0081' post='970951' date='Aug 10 2009, 07:46 AM
...With the SB all I need to do is pinch the accelerator and the car downshifts and surges forward. That's in D mode. In DS is very sensitive and aggressive and in M mode is brutal.
SB on Automatic transmission makes passing a breeze.
+1

The throttle lag is reduced, not completely eliminated. But its much better than without SB.
Old 08-10-2009, 05:34 AM
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Originally Posted by jherm' post='970801
Yes that's similar to my impressions. Especially in DS and M mode, you can really buck the car (if you want to or if you are not being smooth with the acclerator).

If only it totally eliminated the lag between application of WOT and full engine power.....

IMHO, this is not a "perfect mod" for the lag problem but it does make it somewhat better. And power really comes on a lot stronger with SB.
Actually, electric cars produce maximum torque at 0rpm, Scott - is that a Tesla I see in your future?
Old 08-10-2009, 05:36 AM
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Originally Posted by jherm' post='970413' date='Aug 9 2009, 07:37 PM
Good god, that is not what I want to hear. Installation took 2.5 hours in 103 degree heat. And I was barely able to get pedal assembly back on. And I don't know how you would be able to "put it on the side of the pedal". The assembly doesn't seem to come close to sliding back into place with the SB plug anywhere on the exterior of the carpet. I'm gonna need to see a detailed picture of that setup to believe that's possible.
gosh 2.5 hours?? something is really wrong..mine took like 20 minutes! you shoudnt be this frustrated hun.. sorry for ya... tuck it in behind the pedal and slip it kinda under the carpet.. helps it disappear a little bit.. sorry this was disappointing for you..
Old 08-10-2009, 06:17 AM
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Originally Posted by v_therussian' post='970988' date='Aug 10 2009, 09:34 AM
Actually, electric cars produce maximum torque at 0rpm, Scott - is that a Tesla I see in your future?
My 2003 E39 540i Sport had no throttle delay at all. Mash the accelerator and all the power was there. That what I still don't have in my 550, even with SB.

Sometimes technological advancements such as throttle by wire are actually steps back IMHO.
Old 08-12-2009, 09:36 AM
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So Gentlemen,should one get the SB or not? I gotta decide by this weekend.Help please
Old 08-12-2009, 09:41 AM
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Originally Posted by Guna' post='973833' date='Aug 12 2009, 10:36 AM
So Gentlemen,should one get the SB or not? I gotta decide by this weekend.Help please
yes.
Old 08-12-2009, 02:35 PM
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Originally Posted by v_therussian' post='970988' date='Aug 10 2009, 09:34 AM
Actually, electric cars produce maximum torque at 0rpm, Scott - is that a Tesla I see in your future?
I am more interested in a M5 Vlad.

But I would seriously consider a Tesla as a second car if I could afford one here in the land of $500 monthly parking payments....
Old 08-12-2009, 02:36 PM
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Originally Posted by Guna' post='973833' date='Aug 12 2009, 01:36 PM
So Gentlemen,should one get the SB or not? I gotta decide by this weekend.Help please
Yes, I like my car with it better than without it.
Old 08-13-2009, 02:24 AM
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Yes. Get the SB, it's the best discovery since sliced bread.


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