Quote:
Originally Posted by aus
Good info. Looks like the first run was also 10 degrees hotter?
I could see the 100cpi cats/resonator causing some restriction on a blown car. It's way more gas flow than it was designed for. Evolve did pressure test on their X-pipe and didn't see much loss with the 200cpi cats in the secondary position, but I'm guessing that was on a FBO motor.
Maybe they could do another test on a blown motor??
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Yeah first run was definitely a hotter day. Interestingly it was also a less humid day. Obviously SAE and STD correct for these ambient condition differences to a large degree. What little they don't correct for, I think the gains are so large that one can't reasonably chalk them up to weather variance.
My understanding is the impact of 100 CEL cats are minimal if not negligible. I'm no expert on restriction. I think the same logic applies here as it did above. Because of the size of the gains, I don't think they can be explained with reference to the cats alone.
The evolve test at 200 CPI is interesting, and corroborates the above, even more so since the Akra is even less restrictive at 100 Cel.
Quote:
Originally Posted by flipm3
Thanks for sharing the data.
It would have been great to log IATs and Ignition as well to really take the comparison to another level.
I've always appreciated what MRF did with their XPipe. I wonder if their decision to move the actual "X" more forward toward the engine, similar in design to Gintani and, now, ESS Tuning, is one of the key ingredients.
At any rate, congratulations on the new power!
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I do think we logged Air Intake Temperature, but don't think we did ignition. I can double check with EAS on that. I'll update this thread with whatever info I can get.
I'll have to defer to MRF regarding the design details of their Exhaust, but I believe its actually the opposite. MRF's X is placed further back towards the exhaust tips, not the engine.
Quote:
Originally Posted by ROB_S2K
Interesting results. I wonder why this is. Maybe time for me to change up? lol
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My uneducated guess is that there is something unique going on with the design of the MRF X-Pipe, width of the tube, placement of the X, and air-flow dynamics. But again, MRF Engineering is probably in a better place to discuss the design of their kit. I just like that it makes power. LOL !
Quote:
Originally Posted by schnell325
Do you have any pictures of this mythical beast?
Looks like you've found a winner with your exhaust setup.  |
Agreed about it being a winner. I can try to get pictures of it for you. I don't have any at the moment.