Hi !
First some facts:

To further increase the engine torque during fast acceleration, for example, cars with engine alternative B235R and manual gearbox have a function called "Overboost”.

The overboost function enables the engine torque to be higher than the normal values programmed in the Trionic control module memory. The normal value is max. 350 Nm in the speed range 1900-4000 rpm, but during powerful acceleration when the overboost function is activated, the control module will change to another value that allows a higher max. torque (370 Nm in the same speed range). The overboost function gives an increase in torque in all speed ranges, although the increase is greatest in the range 1900-4000 rpm.

The time in which the overboost function is allowed to be active is 20 seconds, after which the control module will return to the normal engine torque curve. The time for overboost is maximized to 20 seconds to reduce the thermal strain on the engine.

After using overboost for a period of 20 seconds the control module will use the normal engine torque curve for 10 seconds. This to give the engine a chance to cool down before a new period of overboost is allowed.

Then, specs for different MY:
MY/00: 230hp/man:350Nm, aut:330Nm (overboost:240/370)
MY/01: 230hp/man:350Nm, aut:330Nm (overboost:250/370)
MY/02: 250hp/man:350Nm, aut:350Nm (overboost:250+/370)




posted by 81.225.2...

• 230hp or 250hp for 2000 Aero stick?...nm, Mike Lynch , Wed, 26 Nov 2003 10:31:13
  • Thanks all for the clarification..and Happy Turkey day!, Mike Lynch , Wed, 26 Nov 2003 13:43:05
    • Re: Thanks all for the clarification..and Happy Turkey day!, Dean, Thu, 27 Nov 2003 07:51:23
      • Re: Thanks all for the clarification..and Happy Turkey day!, Dr Boost, Thu, 27 Nov 2003 12:33:48
        • overboost, Jason, Thu, 27 Nov 2003 16:54:22
  • For 2000-2001 Aero 230hp, 2002 on 250hp n/m, TKC, Wed, 26 Nov 2003 10:38:45
    • Doesn't stick get overboost in '00-'02 ?..., Mike Lynch , Wed, 26 Nov 2003 10:44:21
      • Overboost affects midrange torrque, Stephen Goldberger, Wed, 26 Nov 2003 10:54:58
        • Overboost, Facts, Dr Boost, Wed, 26 Nov 2003 13:12:02 <-- Viewing This Message
          • Is there overboost in the earlier MY '98 and '99 9-5s?, mdj, Wed, 26 Nov 2003 14:22:23
            • Re: Is there overboost in the earlier MY '98 and '99 9-5s?, Dr Boost, Thu, 27 Nov 2003 12:18:54
            • Nope, Bill S., Wed, 26 Nov 2003 16:58:37
              • Thanks,, mdj, Fri, 28 Nov 2003 08:32:38
          • WOT for 20 secs is actually a long time with, AdamB , Wed, 26 Nov 2003 14:12:25
            • 0-100 in way less than 20 sec....nm, Mike Lynch , Wed, 26 Nov 2003 14:47:03
              • Realistically..., bRAD, Thu, 27 Nov 2003 07:15:23
                • Re: Realistically..., Dr Boost, Thu, 27 Nov 2003 12:21:51

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