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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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10-15-2015, 03:50 PM | #15 |
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Any sound clips?
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10-15-2015, 05:01 PM | #16 |
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Nice! If I had the skills, I would have probably done the same. Wishing I took pictures, but the gutted cats definitely don't promote smooth laminar flow. The transitions in the header/FP after the cat is terrible. But if you're in the business of paying someone to remove your header/fp, cut out, and replace your cats with pipe, then you may as well buy a budget header/fp. It'll probably cost the same. The car will benefit from slightly bigger diameter tubing as well. That being said, I'm out a couple hours worth of work and my wallet is untouched, but I've netted a couple ponies and a few ft-lbs. Worth it in my books... |
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10-15-2015, 05:03 PM | #17 |
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I'll try and get some later today if that helps? But I find recordings don't really come close to what most exhausts sound like in person.
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11-14-2015, 07:19 PM | #18 |
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11-14-2015, 09:04 PM | #19 |
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I used a Hero 3 to try and record the sound just now... It doesn't sound as good as it does in person...
Custom muffler delete, and both cats are gutted. Video shows cold start, idle, minor blips, and banging off 4k launch control. [ame="https://www.youtube.com/watch?v=IbA_jWi88ws"]FRS Exhaust - Gutted Header, Front Pipe, & Muffler Delete - YouTube[/ame] |
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11-14-2015, 11:21 PM | #20 |
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Good looks bro, I haven't heard it yet but I'll take a listen a little later.
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03-14-2017, 02:34 PM | #21 |
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Wonder how the 2017 revised manifold will do if gutted.
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03-15-2017, 12:25 PM | #22 |
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Gutted Header & Front Pipe - Dyno Inside
is it possible to weld a high flow cat on stock header?
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03-15-2017, 12:38 PM | #23 |
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Yes, but why? Unlike with just gutting it you'll get smaller performance gains, and added costs of buying cat and paying for welding work will nullify cheapness bit. And even if primary cat in header is HF one, you won't be 100% safe from seeing cat readiness CELs. If you are ok with doing something to stock cats, aftermarket header with HF cat or even catless aftermarket header will be better choice (one stock secondary cat should be sufficient to pass smog tests, if those don't include visual checks).
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03-15-2017, 02:13 PM | #24 | |
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05-17-2017, 01:59 PM | #25 |
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I plan on doing this, but have sourced a cheap OP and Berk HFC FP to go along with the gutted stock header. I am a complete noob in terms of tuning, would it be safe to assume an OFT OTS EL 93 octane tune would be a good starting point for this setup?
My primary use would be for autocrossing
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05-17-2017, 03:02 PM | #26 |
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I guess you can use OFT Stage 2 EL tune with gutted stock header, which, while not completely, is EL header, and Stage 2 tunes are for catless headers.
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05-17-2017, 07:52 PM | #27 |
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I've been gutted on Stage 2 OTS 93 tune since last summer. No probs
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09-18-2017, 08:56 PM | #28 | ||
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I just found this article. Interesting read on gutting the cats.
http://www.circuitmotorsports-blog.c...-fr-s-86s.html Quote:
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