I finally got around to doing a good comparison with my n75c and n75j valve. I posted this on vortex, but I never check there anymore so I thought I'd post here too.
Originally, I had some surging going on with the C valve. I tried the J, which made it even worse. Then I got myself a Forge TIP, which cured all surging :mrgreen: and so I thought I'd try the J valve again! I was going to sell it, but now I think I'm going to keep it!
So, the below graph is a chipped 1.8T (Upsolute) with 2.5" downpipe, TDI midpipe + stock muffler, Powergasket, Forge TIP and a PiperX flat-panel air filter.
Note that there aren't any oscillations (yay forge TIP!) but there sure is a good boost spike :mrgreen: The big difference is between 3000 and 3500 rpm.
For reference, here's me with just a chip and 2.5" cat-back:
Now I want to try an H valve. Anybody have one for sale? Or even to borrow for a week so I can add to my graph?
Originally, I had some surging going on with the C valve. I tried the J, which made it even worse. Then I got myself a Forge TIP, which cured all surging :mrgreen: and so I thought I'd try the J valve again! I was going to sell it, but now I think I'm going to keep it!
So, the below graph is a chipped 1.8T (Upsolute) with 2.5" downpipe, TDI midpipe + stock muffler, Powergasket, Forge TIP and a PiperX flat-panel air filter.
Note that there aren't any oscillations (yay forge TIP!) but there sure is a good boost spike :mrgreen: The big difference is between 3000 and 3500 rpm.
For reference, here's me with just a chip and 2.5" cat-back:
Now I want to try an H valve. Anybody have one for sale? Or even to borrow for a week so I can add to my graph?
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