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Discussion Starter · #1 ·
Put on a brand spanking new APC onto the aero today and it has become the same 300bhp Fire Breathing Monster ( ) it was before I noticed a few problems. It's boosting much quicker now and pick up is much better.

I have noticed however and this did happen before I changed the APC but when I back off the turbo the boost guage drops down to something like -0.8bar. It's quick to rise again but I'm not sure if it should drop so low . Does this sound normal. (With the air-con off I'm hitting 1.2-1.3 bar)
 

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I agree, the gauge reads the intake manifold.
When the throttle plate closes all you have is vac from the engine, no boost is in there.

I'm looking forward to ordering stage 4 after my clutch upgrade.
 
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