No pics right now, as I have to get on a plane in a few hours. I promise to post graphs when I get back. In a nutshell:
The Green Filters, as I suspected before, don't fit. They look IDENTICAL to the factory filters in size, yet it is almost impossible to get the airbox cover on with those filters on. Why? The factory filters have a lot of "give", especially in the orange rubber material at the ends. These Green filters have a MUCH harder black rubber/plastic end that does not allow it to "wedge" into place like the factory filters. Nonetheless, Frank tried them out with his airbox barely closed. He was not particularly happy with any of his numbers, but here is how they played out:
Stock filters: 427.4 rwhp and 469.0 rwtq
Green filters: 435.8 rwhp and 475.5 rwtq
K&N tube and filters: 442.2 rwhp and 478.1 rwtq
We think part of the problem with his car is that Frank tends to "cruise" it more than some of us (not as much WOT), and thus his computer has adjusted accordingly. We did not do any power disconnects before or after any dyno runs. Next up was Mike with his black SRT-10. No reason to bother with the Greens, as we already knew they wouldn't fit properly. His results:
Stock filters: 435.5 rwhp and 474.1 rwtq
K&N tube & filters: 451.8 rwhp and 489.6 rwtq
Next up was Allen's red SRT-10:
Stock filters: 436.6 rwhp and 473.7 rwtq
K&N tube & filters: 452.9 rwhp and 493.0 rwtq
Bottom line? The Green filters are probably good for a decent gain (~10 HP), but the fit isn't quite right. They are definitely a better price and would fit fine if you don't mind possibly having to grind down part of your airbox ribs. The K&N system just seems to be a MUCH better fit and also delivers the power to make it all worthwhile. Also, seeing that "K&N" logo when you open the hood at least tells folks you aren't satisfied with a stock car. I will try to post graphs when I return, but hopefully this should give you some more stuff to discuss!
Once again, our thanks to JonB at
PartsRack for the very generous loan of these various filters for dyno testing. At least three more K&N orders will be ringing in from Kansas City!
Chris
PS. My crappy ol' SRT put down 461.7 rwhp and 502.4 rwtq with the K&N's yesterday - no stock filter runs for me!
. There will undoubtedly be other options down the line but I would be willing to bet almost any amount that they will be VERY expensive compared to the gains/$$$ ratio the Belangers produce. Plus as you have undoubtedly seen the engineers will tell you this is about the limit without totally redoing things internally = lots of $$$.
