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Durametric values

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Hi. First sorry for my bad english [emoji12].

I'm doing tests to check my low performance on dyno. 187hp instead of 204hp (1997 2.5 Boxster). No cel, new lambdas, new filters (all), no dtc.


I have all values correct except:

-Spec. Air mass: 14-16 instead of 15.25-15.75

-Spec. air adaptation: -1 instead of 1.45-1.55

-Ignition timing: 4.5-5.3 instead of 4.8-5.8

Maf readings are correct at iddle and at 3000rpm. Peak maf readings 2nd gear WOT are about 550kg/h. Tried with another used maf and same values at wot 2nd gear.

AOS? Air leak?

P.S.: installed high flow headers, 996 3.4 throttle body (correct tps readings) and a plenum insert like techno torque.

Plenum insert:


Thanks and kind regards!!

Enviado desde mi Redmi Note 3 mediante Tapatalk


Edited by Loren
Porsche copyrighted material removed.
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  • 3 months later...

Hi! Uninstalled technotorque, cleaned maf, new bosch lambda, new aos, new fuel pump, adjusted TPS.
Mods: 996 big TB, high flow headers & exhaust.

Dyno result:
125,7kw at wheel (124kw at wheel are nominal value from this web http://rototest-research.eu/popup/performancegraphs.php?ChartsID=453 ) and 8Nm more of torque.
Is a good graph?

Enviado desde mi Redmi Note 3 mediante Tapatalk

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