02-23-2018, 01:51 PM | #57 |
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I'd actually love to know and see how the Ace Header 350 (seeing how it's often crowned the king of header choices) compares to the Fujitsubo SuperEX EL Catted Exhaust Manifold (comes with the OP included too).
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02-23-2018, 01:57 PM | #58 | |
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That said I have seen no dyno graphs from this header. |
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02-23-2018, 02:07 PM | #59 | |
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The reason I brought up this specific header is just due to price and the oh so popular ideal of "you get what you pay for". Granted I believe if you asked Fujitsubo, the SuperEX price of 2600 would speak more to their quality of work and materials insofar as weld points and keeping it relatively quiet. Conversely, ACE would speak to their focus being all out performance (I assume of course). Anyways, the only person I've seen dyno it is DSOmegaX and he had the SuperEX header/OP, Fujitsubo FP, Stock Midpipe, and STI Sports Muffler. I believe he was a couple ponies shy of 200 to the wheels.
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02-23-2018, 02:31 PM | #60 | |
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The blue line below is the torque curve of the "mother" engine. It is the FB20 engine which was used as a base to design our engine. My daily car has this engine and it has no torque dip at all. Do you see any dip in the curve? Do you think they could avoid the dip in the older engine and not in the newer? |
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02-23-2018, 03:14 PM | #61 | |
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02-23-2018, 03:49 PM | #62 |
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Without dynoing the car, I love my ACE A/350 with Delicious Flex Fuel and tune. The car feels so much better than any other header and words above the stock header. I took off my Supercharger recently and I'm actually surprised how much power this car still has. Butt Dyno is satisfied. Numbers aren't everything, after all, did you buy a 86/BRZ based on the numbers? Thought so.
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02-23-2018, 05:13 PM | #63 | |
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02-23-2018, 05:26 PM | #64 | |
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02-23-2018, 06:04 PM | #65 |
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I wish there's a comparison between ACE 350 & 150. The latter yields more top end and less low end, but really by how much?
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02-23-2018, 06:13 PM | #66 |
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Here is my virtual dyno. Don't look at the numbers which are obviously wrong (I had to select a 2014 BRZ and changed the final drive to 4.3) but just look at the hp and tq curves.
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02-23-2018, 07:03 PM | #68 |
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02-23-2018, 07:41 PM | #69 | |
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If my theory is true then trying to hard tune out the dip without a header could be dangerous or increase the chance of engine knock. The FB20 is a stroked FA20 (minus port injection). The FB20 has a lower compression, so it would make a good apples to apples comparison for comparing the effects of compression ratio on low end torque (to demonstrate my theory true or false), but it isn't a good apples to apples comparison because the engine is undersquare (longer stroke and smaller piston diameter than our square setup). Usually a stroked motor will have more low end torque, so any dip alleviation from not being as high compressed could just as likely be from being stroked. Thus, I agree with you that the FB20 isn't an apples to apples comparison for my theory or for his theory. |
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02-23-2018, 08:06 PM | #70 | |
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A stock FA20 tuned on Motec, still exhibits the dip. |
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