Re: How loud will a TDI race down pipe be? (golf_tdi_kid)
It will be noisier/dronier, and the turbo whistle can be heard almost a mile away.
It won't sound like a Civic with a fart can, but it will be noticeably louder than if you only had a mufflerectomy. However, you'll get used to it after a few days. It's not as loud as a Subaru WRX or Honda Civic with a loud exhaust, and it's quite quiet on the highway.
I have a GHL 2.5" non-cat downpipe, stock cat-back piping, and no muffler and I have gotten used to the noise level. At WOT, near redline, there's a loud roar that's pretty distinct, probably from the VNT vanes at full-spread. Turbo whistle is very apparent too.
I'll try to record some sound clips once I get my hands on some suitable equipment.
As for performance gains, I did feel an improvement in acceleration. Turbo lag seems to have decreased and there is less lag between shifts when driving the car at WOT. I have never dynoed my car, but after installing the GHL downpipe and driving around for a week, the car seems to pull harder and experience less spool-up lag.
Modified by Deception at 5:24 PM 11-19-2004