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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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#29 | |
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take it off. break apart the cat in the inside. wash it out. then polish it. done! later going to put a pipe in.
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The Following User Says Thank You to NickFRS For This Useful Post: | clintavo (01-27-2014) |
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#30 | |
Fast enough
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If you increase the VE, while RPM remains the same, you WILL have less boost. So yes you're right. Science is fact. |
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#31 | |
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(not to mention this is stock intake/stock header) Stock on both ends. the front pipe is even stock. The exhaust is only non OEM demension from he mid pipe back which doesn't change flow that much. The header/intake act as a bottle neck. The only restriction (if you want to call cats huge restriction) that was removed was the cats and the midpipe/catback. Not even arguing the boost was different from 1 set up to the other. There was no recording done on that end. Same pulley size = same boost every run on charger. /done talking to trolls about boost on a exhaust/intake section.
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#32 | |||
Add lightness!
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#33 |
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#34 |
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What just happened?
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#35 |
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Lol forget the guys.
Is noise noticeably louder? I have a Berk muffler delete and i dont want to wake up the neighbors. I hope to get my header out and try this, this weekend and see if i can notice a difference in power. |
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How is the gutted stock header holding up, I'm beginning to think this is a smart way to go. You said your turner pulled timing around 3,5k but did he adjust the vvt? Just looking for an update.
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#37 |
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Interested as well in this information. It does make sense, I think even "high flow cats" get downplayed by most on this forum about how much they can restrict flow. A "high flow" metal substrate cat is nothing more than better flowing compared to a traditional OEM cat. That's not saying much. Empty pipe flows better than a high flow cat.
And I'm not here to debate about the environment so please, please, please don't go there on a soap box. I'm simply stating air flow dynamics and performance. |
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My FR-S has 5 gears
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You gonna sell your gutted stock parts? If so pm me.
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The stock manifold is a quality piece right up to the cat where the collector would be on a header.
Gutting the stock manifold cat should allow the same ability to do the magic vvt and ignition magic tuners are doing to eliminate the torque dip with catless headers. I would be interested in knowing if the gutted cat developed any exhaust leaks. Also I think there would be a market for taking the stock manifold and replacing the cat with a quality collector along with a tune. Budget performance that would probably compete with HKS EL's, and you get to the keep flexjoints!
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#40 | |
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#41 | |
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As for noise it's not that much louder then before. But obv it's loud after 4k RPM's esp since i'm boosted.
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#42 |
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