Hey guys,
I was planning on breaking in to the 11s all turbo today, but the weather just didn't want to cooperate. Since I was already dressed up, I decided to swing by the dyno on the way back.
Mods are JB, UR offroad downpipes, 2nd cats & res removed, cutouts, and ITG air filter. All runs were on ~96 octane. Correction factor 1-2%.
Run 4 is the off the shelf JB2
Run 5 is the JB2 with the new downpipe/93 octane pill
Run 3 is the JB2R with the new downpipe/93 octane pill
Overall I was pretty happy with the numbers. I also did a run closed cutouts (stock muffler), and peak hp/tq was around 8 less.
To do a quick analysis on the downpipes, I did around 323rwhp before on the JB2 91 octane, stock downpipes, stock mufflers. So I *think* the downpipes were worth around 10rwhp/15rwtq on the normal JB2. Not bad at all! Spool is much better, and the sound is a bit more tinny but not bad. Overall they are a high quality product and do perform. I don't really want to get in to a downpipe war but will be testing the Riss downpipes soon as well.
The downpipe/93 pill adds around .5psi, and produced a nice gain. On the JB2R + .5psi the torque really took off, maybe too much for daily driving, but makes for a fun track curve. Not *too* lumpy...
Anyway enjoy.
