The beast so far

[dportaz]

So a bit of an update...

I recently completed the rest of the exhaust system after doing the downpipe around 6 months ago for stage 2... The result is beasty... especially when giving it a bit of boot...

Bit of trial and error as the first system was waayy to loud, but now im fairly happy with the result... Probably could be 10-20% quieter coz being a wagon doesnt help with sound in the cabin (as all wagon owners know) and it does drone a bit but only when accelerating - cruisng is quiet....

Its now a full 3" system with a resonator (not to sure what kind of resonator tho)... What are peoples thoughts with quieting it down a bit more and a bit less of that drone...?? Would going to a 2.75" cat back do it...?? Add a bigger/better resonator..?? thoughts...??

I have added soundproofing since and it made a big difference and now cruising on the freeway is super quiet... also muffled the exhaust sound, but as mentioned, just want it that 10-20% quieter if possible...

Here is a clip.

The exhaust shop (trufit exhausts in cheltenham/moorabbin) has been super helpful and understanding so next time I go there im hoping it will be the last...

In terms of other mods, the only other thing I can think of doing is the DSG tune which will have to wait for a few more funds..

[GTR27]

2.75 vs 3" won't make much difference to drone. Having resonators and mufflers in the right spot will. I'm not an exhaust guy but have heard of people putting a wax line the length of the exhaust and where standing waves are (drone) it melts the wax and you cut that part out and put a resonator/muffler there. The exhaust place should be able to help out though. Sureflo in Sydney are very good in commodore circles for drone free custom exhausts.

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[dportaz]

Starting to understand these things a bit more now and I have spoken with my exhaust place again and they are going to investigate it for me so I can take it in next week to quieten it down more.

Will post up results... Im hoping to bring it down by another 25% as I only really wanted a bit louder than stock with some performance improvement and cleaner power delivery which it has given me...

Hopefully it all works out and it will be a valuable lesson learnt for my next car as I have more knowledge now about what is available...