neurotic

The T1R-70EM and T1R Gernpipe muffler section were/are singles.

ES2K

The T1R-70EM and T1R Gernpipe muffler section were/are singles.
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Did you notice a difference in drone between the two? Another benefit of the gernpipe is supposed to be reduced drone over other after market systems

sillyboybmxer

I thought the t1r EM singles could NOT be used with the Midpipe.

I take it you bought the open ended midpipe had to get the axleback muffler welded a bit different to mate up. Possible a kink restricted it more than the full t1r EM system?

neurotic

The Urge system is significantly louder from the outside, but about the same volume inside the cabin. Although, the tone and is quite a bit different. The Gernpipe is not boom-y like the 70EM can be at some cruising engine speeds.

These were sold by Urge with dual and single "axle back" muffler sections made by T1R. The Urge single version uses the dual's piping layout (and possibly longer muffler canister) which has tighter bend radii than the single version; this could be contributing to the lack of gains.

T1r-70EM/Berk HFC on the left, Urge STR Gernpipe on the right.

Urge

Our STR does not have any sound dampening in the mid pipe as it is much narrower than the normal Gern Pipe. This is the only way it would clear the transmission tunnel and meet STR rule of being with in 6" of he OEM cat. The STR was always going to be louder the regular mid pipe, but does still reduce drone.

Compromises to meet STR rule vs Loudness.

PMing you about the tune.

sillyboybmxer

Ahhh ok. I was under the impression you just used the midpipe and the same t1r em muffler off the old system since the red dyno listed "urge str gernpipe" and not full urge system

s2kaok

Urge and Gernby, please update this thread once you have looked at the data and tune as this one of the last pieces of my STR build. Thank you.

sillyboybmxer

We know anything about this yet?

Gernby

Sorry for the delayed response. I looked at neurotic's tune and data (Thanks for sharing it!), and think it supports expectations.

I won't disclose info about neurotic's tune without his consent, but it isn't very typical for an S2000. The Dyno plots did look better with SAE correction applied, which I think is the real issue with the test. The Dyno weather station indicated enough of a change in climate to bump the correction factor from 1.01 to 1.02, which is more than enough to indicate gains from the gern-pipe. Whether the Dyno was correct or not is the debate.

That said, Dynos are not perfect, and results will vary from one run to the next even without changing anything. One of the runs actually showed a significant gain across the whole rev range, which was just a fluke.

In short, I think there was either a small gain or no change in peak power, but there was a gain in midrange. That's the whole premise of the gern-pipe. If there is anything to be disappointed about, it's why there wasn't a bigger gain in the midrange. I think the issue with that lies in the tune.

s2kaok

In relation to the tune, was it significantly different than the tunes you provide to people remotely? If so, how are they different (if you are willing to share)? If this is the case, do you think your remote tune would have accomplished more in this case?