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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 03-08-2019, 07:13 PM   #29
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Crawford is a pretty smart guy

The ecoblock guy? Smart enough to sell snake oil I guess.
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Old 03-08-2019, 07:23 PM   #30
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snake oil, that seemed to work as claimed even at 3rd party tests.
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Old 03-08-2019, 07:42 PM   #31
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I'm interested to see where this goes and if you will be able to extract any extra gains over the factory manifold. I would also consider it if it was in the same ballpark, price wise, as the 17+ red piece.


Good luck and thanks for sharing data from your testing methods.
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Old 03-08-2019, 09:15 PM   #32
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I'm interested to see where this goes and if you will be able to extract any extra gains over the factory manifold. I would also consider it if it was in the same ballpark, price wise, as the 17+ red piece.


Good luck and thanks for sharing data from your testing methods.
I dont think there is a chance of it going for $400 with all the RnD involved. $1000-1400 would be fair if its successful.
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Old 03-08-2019, 09:22 PM   #33
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There were several companies designing manifolds when these cars came out. Crawford was one of them. They found gains through additional runner length hence the power blocks. It's going to be hard to beat subaru's modeling software on this one.
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Old 03-09-2019, 12:18 PM   #34
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There were several companies designing manifolds when these cars came out. Crawford was one of them. They found gains through additional runner length hence the power blocks. It's going to be hard to beat subaru's modeling software on this one.
Adding to this. The BPBs represent a solution with different optimization parameters (peak output at lower rpm), rather than a more optimal solution to the same problem. The former is what the aftermarket does well, but the latter is firmly in the OEM wheelhouse.

Back to the original topic, it seems the OP is trying to out-optimize the OEM. That's probably not going to happen as there isn't much left on the table. Instead, it might be better to define the difference in the problem parameters so that you are optimizing to a different target, like the Crawford BPBs.

Alternatively, throw out all the OEM design decisions and start from scratch, modeling the physical effect you want then finding ways to make it happen. That's pretty damn expensive and risky though.
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Old 03-09-2019, 01:29 PM   #35
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I'd love lots more low end and mid range torque, even at the expense of top end power.
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Old 03-09-2019, 02:15 PM   #36
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I'd love lots more low end and mid range torque, even at the expense of top end power.
Lots more will require a motor swap or forced induction.
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Old 03-10-2019, 09:36 AM   #37
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Lots more will require a motor swap or forced induction.
Or displacement.... What if we got the FA24 and the runner length with the intake and spacer blocks... all the torque!
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Old 03-10-2019, 09:40 AM   #38
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Or displacement.... What if we got the FA24 and the runner length with the intake and spacer blocks... all the torque!
Still involves a motor swap for us though. Lol
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Old 03-10-2019, 10:09 AM   #39
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Haha yeah yeah.. let me call up Subaru corporate and convince them to drop a HO variant of the FA24 into future generations of BRZ XD
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Old 03-10-2019, 11:32 AM   #40
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Haha yeah yeah.. let me call up Subaru corporate and convince them to drop a HO variant of the FA24 into future generations of BRZ XD
If the platform isn't discontinued they may do just that.
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Old 03-10-2019, 06:18 PM   #41
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They have but its $3600.. Even looks similar to Porsche ones.
You're talking about the JUN one? Is there any other company?
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Old 03-10-2019, 06:58 PM   #42
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You're talking about the JUN one? Is there any other company?
Yeah I'm talking about them again. Didn't want to keep mentioning a competitor over and over. Lol There is one other one which is probably better but GRMN only made 100 them for their $50k 86.

At the moment I think our best option is on your car in particular. Haha
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