Added TTDA to APR chipped 225 = -3 pounds less boost

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Nov 11, 2004 | 12:03 AM

mikemoor

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Added TTDA to APR chipped 225 = -3 pounds less boost

Got my TTDA from TTSchwing and installed it ... Looks and sounds perfect ...

So I get out to drive and it doesn't feel much (or any?) different. No surprise having just bolted it up on a 65 degree day but at least nothing bad happened :-)

Now the surprising part is that when I check the boost gauge I'm only boosting to 15psi (1.1 bar) rather than 18-19psi (1.4 bar) ... Felt as good as before prior to looking at gauge but now I'm not so sure - may be psychological ...

So I set the APR chip back to stock mode to check and surprise, surprise ... I'm only getting like 8-10 psi (0.7-0.8 bar) rather than 14-15 psi (1.0 bar) before.

I'll check all the obvious stuff on the weekend - make sure the air hoses aren't hard up against anything and blocked, check I haven't knocked any sensors loose, etc ...

But in the mean time, has anyone else experienced this or have any suggestions?

Nov 11, 2004 | 04:28 AM

02TTK04

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Put your stock airbox back in and see if that takes care of the problem. TTDA could be defective.

Nov 11, 2004 | 04:30 AM

TTTEXAN

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You might want to email schwing

Nov 11, 2004 | 05:34 AM

TTschwing

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Not Normal, but here's some suggestions Mike...>

Anytime you change anything The ECU needs a certain amount of time/miles/cycles to rebuild adaptation maps to optimize the changes. It is not normal to lose boost with a TTDA install. If you have some components that are deteriorating (like a MAF), the increased flow could accelerate that. My suggestions are: Pull your MAF element and clean it, and do an ECU and throttle body re-set. That'll get all your adaptation maps back to "0" Also make sure you don't have any falult codes lingering...