NB05 FM2 good top power, slow boost build

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05-18-2015, 09:28 AM

elior77

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NB05 FM2 good top power, slow boost build

Hey,

I just finished tuning a friend's NB 2005 with FM2 on a dyno.

We got 240hp on Dyna Pack.

The only problem is the boost comes up slow and linear, is it a boost leak or something else ?

Boost leak ? spark ?

Stock NB 2005, ID725, FM2, Haltech 1000, AEM WB, EGT.

Thanks !

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05-18-2015, 09:31 AM

concealer404

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Have you done a boost least test?

We are unable to troubleshoot your car with the information given.

05-18-2015, 09:32 AM

elior77

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Will do a leak test, I just want to get some feedback on what can cause it.

05-18-2015, 09:40 AM

concealer404

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A boost leak could cause it.

So could a 6psi wastegate spring and some creep.

05-18-2015, 09:41 AM

elior77

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It is the stock FM2 actuator that came with the kit, bolted to the turbo.

05-18-2015, 09:44 AM

concealer404

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Which is for what psi?

05-18-2015, 12:32 PM

codrus

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What did you set the rise and hold times to on the Dynapack? If it's too short, then it's like you're running the car in the wrong gear and the turbo doesn't have time to spool.

--Ian