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Title: Adjust calculation of ps_w and msdk_w Post by: M.Mischler on November 29, 2024, 09:46:23 AM Setup:
OEM Parts ------------ 2.7t AGB FPR S4 B5 (4 Bar) MAF S4 B5 Throttle body S4 B5 Tuning Parts -------------- Bigger charge-air cooler 630cc EV14 Bosch injectors Bigger turbocharger Bigger exhaust manifold Intake manifold RS4 B5 I have the following two issues: - IntakeManifoldAbsolutePressure (ps_w) is higher than ActualBoostPresure (pvdkdsl_w) - MassAirFlowAtThrottlePlate (msdk_w) is higher than actual MassAirFlow (mshfm_w) The forum entry http://nefariousmotorsports.com/forum/index.php?topic=14012.msg113563#msg113563 discusses my problems. According to nubcake I have to adjust all *WDK* maps first: Basically: 1) ... set WDK maps close enough. Does this mean that I should adjust the KFWDKMSN and WDKUGDN maps? And what does "close enough" mean? Title: Re: Adjust calculation of ps_w and msdk_w Post by: prj on November 29, 2024, 10:56:30 AM Your throttle body is stock so KFWDKMSN and KFMSNWDK do not need to be modified.
For msdk_w there is only WDKUGDN. About ps_w everything is written in that post. Title: Re: Adjust calculation of ps_w and msdk_w Post by: M.Mischler on November 30, 2024, 09:29:09 AM Your throttle body is stock so KFWDKMSN and KFMSNWDK do not need to be modified. For msdk_w there is only WDKUGDN. About ps_w everything is written in that post. Hi prj Thank you for answering me so quickly. I will read the relevant part of the FR again, try to make the necessary changes and get back to you here if I come across any problems of understanding. Title: Re: Adjust calculation of ps_w and msdk_w Post by: M.Mischler on December 03, 2024, 08:25:29 AM About ps_w everything is written in that post. URL/PRG to adjust VE. My current understanding is that changes in KFURL have a greater impact on ps_w than changes in KFPRG. But both have an impact on ps_w. I would like to know if I should only make adjustments to KFURL? Or if I should only adjust KFPRG first. Which is better in your experience? Title: Re: Adjust calculation of ps_w and msdk_w Post by: prj on December 03, 2024, 04:47:16 PM What you wrote makes absolutely zero sense.
KFURL * KFPBRK + KFPRG is the formula. It's basic school math. Title: Re: Adjust calculation of ps_w and msdk_w Post by: M.Mischler on December 04, 2024, 03:27:47 AM Hi prj
What you wrote makes absolutely zero sense. KFURL * KFPBRK + KFPRG is the formula. Thank you for your feedback. I'll ask my question differently: what criteria do you use to decide whether to adjust the values of KFURL or KFPRG so that ps_w reaches the desired value? |