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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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05-25-2012, 01:58 AM | #29 |
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This. We won't know till we start getting independent stats and even then you have to filter through some. Through my time of forums, some shops aren't 100% unbiased
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05-25-2012, 02:42 AM | #30 |
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It's also hard to find shops with reliable dynos. I hope this forum doesn't get on the dynojet bandwagon.
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05-25-2012, 08:59 AM | #31 |
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Couldn't agree many recipients with both statements. Very excited to see personal projects get dyno. And not on a dynojet lol. Have u guys seen the new aem drive shaft dyno:happy0180:
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05-25-2012, 09:50 AM | #32 | |
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Quote:
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05-26-2012, 08:34 PM | #33 |
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N/A motors will never get 30whp, you will be lucky to get 15whp with a full exhaust setup.
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05-28-2012, 07:04 PM | #34 |
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I find it hard to believe no one has been able to dyno a TRD US style exhaust.
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05-29-2012, 02:13 PM | #35 |
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The problem with just basic bolt-on's is that these engines are already so efficient! I'm afraid that direct injection will just amplify that fact. However, if Toyota/Subaru were conservative with the intake/exhaust/head flow, this motor could be a beast with head work! Cosworth head + HKS SC + intake + full exhaust = 300whp? Subtract the SC and you have 250whp maybe? With no weight gain!
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05-29-2012, 02:55 PM | #36 |
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Hey guys, for those wanting massive gains on a better flowing exhaust. Prepared to get disappointed. You wont see those 15whp+ gains.
However what I have seen personally is a upwards of a 7whp gain. on a axleback 2.5inch system with no cat. not impressive right? well what you dont see is how much smoother the powerband is especially in attempting to cure the mid range tq loss. which really changes the character of the car. Im scheduled on doing some vids and reviews tomorrow with the nameless exhaust prototype. Also, for those not familiar with N/A boxers. Much of the important gains can be made at the headers when talking about EJ251-EJ254 and EJ20D-EJ204. This may also be a similar case with the FA20, especially with a restrictive pre-cat and collector before the overpipe. So far i have no personally seen aftermarket header work yet...(not until the end of the month) so im sure Perrin or someone similar will get one working soon. One big issue that we are encountering is the ECU factory tuning not being kind and compatible to the larger aftermarket exhaust. With its continuous adjustments limiting the power. Im predicting a 11-14whp gain and 7-9tq gain and a much smoother and direct powerband on Equal Length Headers, and a straight through 2.5-2.75 exhaust.
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05-29-2012, 03:25 PM | #37 | |
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Quote:
I agree we really need to see an ecu tuning solution before we can see real gains out of "flow"type upgrades. I would be happy with seeing10 hp from an exhaust upgrade on a NA car. :happy0180:
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05-29-2012, 03:29 PM | #38 |
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word...from what Ive been hearing lately elsewhere, these ECUs are a bit tricky, reminds me of the Mopar ecus
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05-30-2012, 08:56 AM | #39 |
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I also agree that real power gain from exhaust upgrades lies in the header. With those auxillary ECUs controlling direct injection port, tuners surely have some large homework to do...
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06-14-2012, 07:11 AM | #40 |
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I should be getting my APEX-i one soon... Will take to the dyno and the track soon after, both appointments before end of June.
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06-14-2012, 08:01 AM | #41 |
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very awesome thank you!!! look forward to hearing it!!!!!!
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06-14-2012, 09:00 AM | #42 |
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