Re: Shark Injector Question

["Kittock" <red951@xxxxxxxxxx>]

First off, I don't have an aftermarket 'chip' or software upgrade, but have
looked into it a bit.  There are some explanations for what you have noted,
I'll take a crack at them:


>Subject: Shark Injector Question
>
>Hi all...
>
>I have a '99 M Roadster and I am interested in the Shark Injector.
However,
>looking at the site:
>
>   http://www.eurosporthighperformance.com/chips.html
>
>I am a little nervous about what this chip actually will be.  Several
members
>of the Talon/Eclipse/Laser mailing list had some pretty bad experiences
with
>SuperChips (the guy was selling for $300 bucks a $0.50 bleeder valve and a
>stock chip with his label on it) and I see visions of that based on the
>following.


Actually, this isn't a chip upgrade/change, but you are actually
reprogramming the code without removing the ECU (with the shark injector).
On any BMW '96 and up (ie OBD II) any upgrade will be removing the ECU for
reprogramming, or in place with the Shark Injector.

>On the website, the following numbers are quoted:
>
>   Application:       96-00 M Roadster*
>   HP Stock/New:      250 / 264
>   HP Gains:          34 @ 6000
>   Torque Stock/New:  237 / 276
>   Trq Gain:          40 @ 4500
>   New Rev Limit:     7000
>
>First, there is a footnote which states: "*Numbers are corrected to
crankshaft
>hp/trq NOT to stock hp/trq".  Is that saying that the HP at the crank for
the
>'99 MZ3 is 250 and the stated number of 240 from BMW is at the rear wheel
or
>something similar?

I would guess so, but don't have any data to back it up.

>Second, the HP stock vs. new is 250 to 264, an increase of 14 HP while the
HP
>Gains are 34 @ 6000.  What does this mean?  (even if you assume 240 instead
of
>250, that's only a 24 HP gain)  Similarly for torque, I see the difference
as
>39, not 40.

They are quoting two different numbers.  One is the new peak power and
torque.  The other is the max difference between new and original power and
torque.  This is usually at a different RPM than where peak values occur.
If you can get curves showing original and new values, this will make sense.

>
>Finally, the rev limit on my car (at least where my rev limiter kicks in)
is
>7000 rpm and that is the "new limit" claimed by this chip.
>
>I have heard many good things about this chip from reading this list, but
>these numbers make me worry that there is some degree of "snake oil" here.

I've heard nothing but good about this upgrade.  I haven't as I'm putting my
upgrade $ into suspension.

Mark Kittock
'96 328i sport pkg

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