Question Re: Turbo Back Exhaust...

[BLAZ3D]

Is the boost not controlled by the waste gate ?? There fore if untouched boost should remain the same but have less back preusure and more flow leading to less restriction on the turbo, rather than over boost ,

[BRK]

Yep it is controlled by the wastegate but it does seem that lowered exhaust restriction caused by dump/cat changes reduces the overall backpressure and the wastegate cannot control the resulting exhaust pressure rise quick enough and then you get a boost spike etc. Heaps on the forum about this.

IMO - save some bucks and do the injectors,change the cat, get an F6 air box snorkel (or similar) and a get a retune. The cat change - weld in type - will alter and deepen the exhaust note and support those simple mods. You get an easy to achieve 40+KW at the engine.

Remove centre muffler - some like it and all power to them - but IMO they drone and that is great for 10 minutes... Try driving it on the freeway for 100+k's. with some passengers.

Anyway - just an opinion...