Your specific speed is not an element of VC 23109, just your actions.
23109 (c) A person shall not engage in a motor vehicle exhibition of
speed on a highway, and a person shall not aid or abet in a motor
vehicle exhibition of speed on any highway.
And the agency MUST release the vehicle only under the following circumstances:
(A) If the vehicle is a stolen vehicle.
(B) If the person alleged to have been engaged in the motor
vehicle speed contest, as described in subdivision (a), was not
authorized by the registered owner of the motor vehicle to operate
the motor vehicle at the time of the commission of the offense.
(C) If the registered owner of the vehicle was neither the driver
nor a passenger of the vehicle at the time of the alleged violation
pursuant to subdivision (a), or was unaware that the driver was using
the vehicle to engage in any of the activities described in
subdivision (a).
(D) If the legal owner or registered owner of the vehicle is a
rental car agency.
(E) If, prior to the conclusion of the impoundment period, a
citation or notice is dismissed under Section 40500, criminal charges
are not filed by the district attorney because of a lack of
evidence, or the charges are otherwise dismissed by the court.
Unless your attorney can show that any of these conditions existed, he is not likely to order the release of the vehicle pursuant to a lawful impound (which is permitted for "not less than 30 days" per VC 23109.2(a)(2)(D).