Here's a video of the dyno.

 

nice!
for me, I like it at 1500 -2000, I can hear the deep notes!

btw how many runs did you do on the dyno? 3 or 10?

 

3 runs stock and then 3 to 4 runs with the RPI exhaust. Yea at the low rpms it has that nice low rumble. I love it.

 

Now, how would a tune affect the graph? Would a tune bring the torque and hp up, stretch it out, lower it, what and how??? This is the question.

 

tune what? the computer? bmw engines already run at near max potential, unless you have a turbo....

 

AWESOME! I'm glad you are enjoying it. Thank you for posting the dyno graph and the video

 

We see this from run to run because of the auto transmission and the tq converter. Its because of this we have to run the cars over 20 times to get it consistent in the baseline. You shouldnt have any problems in the low end.

I designed the muffler to be free flow but because of the temp drop of the exhaust gas in mid car, we changed the diameter of the tubing to bring the velocity back up. We're one of the few companies to make a muffler designed for each application to do exactly what you talked about in your previous posts. Good observation!

 

What exactly did you change, the rear muffler only, or the full system starting from catalysators (or maybe even the cats)?

 

the RPI exhaust is an axle-back exhaust

 

of course the computer, on the car. hello, have you not seen the posts regarding SINGH, PES, ESS, etc tunes? come on, if you're not into at least the possibility of tuning the car then why are you looking in the Parts, Accessories and MODS section to begin with?

OK, I'll continue my own search. Sorry if I disturbed you turbowad.