Here is my car with the Gernpipe + Invidia Q300 (Talk about LOUD! But drone-free inside )

http://www.youtube.com/watch?v=okW3fPIq7gE

Here is Greg's car with my Greddy SE Duals & 70MM HFC:
Quote from Gernby: "I don't think I've ever heard drone this bad"

http://www.youtube.com/watch?v=pkrjr9EoY1Y

 

Videos are showing as private. Open them up we want to hear.

 

Done! Sorry about that.

 

Now I wish I hadn't bought my test pipe and flashpro recently, well maybe just the test pipe.

 

hmmm i have a 60mm test pipe with a gern tune, i cant imagine it getting better!

 

I thought the q300 was supposed to be the "quiet" option, jeez. I'm glad I didn't buy it.

 

@Croc - I realize there may be some people that would have a use for a 3rd O2 bung, but I would be surprised if it's more than 10% of my perspective buyers. If I was manufacturing these pipes by the hundreds in China, then it would be cheap to add that extra bung. However, adding the extra bung to all of the 10-20 units I'm planning to build for the S2000 would add way too much cost for the 90% that don't want it.

@Everyone else - Thanks for the interest! It is taking longer than I thought to finalize pricing, since I haven't decided on a welder. I am tacking up the first new production unit (that will actually be for sale) right now, and will have it welded by a local performance shop to see how it turns out.

@Driv300mph - Thanks for the updates and videos. I also appreciate the opportunity to test your Greddy. I had planned to use the Greddy for a couple days, since I didn't really have time to swap exhausts back. However, after experiencing how bad the drone was yesterday, I knew I simply had to swap back immediately. I didn't get to bed until after midnight, but it was worth it. I can't say for sure that it's the worst drone I've ever heard, but the only time I think I might have heard worse was when I borrowed an N1 Single back in '02. Thankfully, God gives us the ability to forget horrible things over time.

Here's the Drone-O-Meter plots from the Greddy at full throttle and cruise throttle.





Here is the flange that I added to the Greddy, but still need to have it welded the rest of the way.

 

I think the Q300 is known for being somewhat drone-less, but it's definitely not quiet. It's very "boy racer" sounding.

 

how effective would this be without the hfc?

 

i'm wondering how effective it will be with F20C engine because we can't drop VTEC so much.
for me with full aftermarket exhaust the tuner could lower VTEC to 5700.
from info i've got at UK forum it's pretty much common to other F20 users too.