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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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05-12-2015, 07:37 AM | #1 |
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frontpipe and emissions control
Hi! someone has increased emissions measured using a hks frontpipe? or any other frontpipe decated?
and frontpipe catted? Very thanzs! |
05-12-2015, 08:37 AM | #2 |
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Well, depending on how strict your emissions are in Spain, visually you will fail if you remove a cat.
If you're going by a "sniffer" test, you can pass with 1 cat. Catless will cause you to fail on some occasions, and it also stinks pretty bad from behind the car. The most optimal setup to stay emissions friendly, provide great performance, and pass visually is to go with a catless header, and a catted front pipe. Visually, it's hard to see the cat in the stock header, but the front pipe cat is seen easily. If you are tuned and your rear O2 is deleted, you will fail an inspection instantly. This is why its handy to have a stock tune file ready to flash or go back to just for inspections. Like I said, I don't know how emissions are measured in Spain, but if you want to play it safe, keep a high flow cat in your front pipe. |
05-12-2015, 09:23 AM | #3 |
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ok, very thanzs!
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05-12-2015, 10:23 AM | #4 | |
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05-12-2015, 10:46 AM | #5 | |
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Some tuners leave the secondary O2 turned on because they're able to keep it from triggering even catless, but in some cases like with my car, I threw the code a couple times and we finally just deleted it. I instantly failed my inspection last time due to the evap system when I tried to go without reflashing back to a stock tune. Now I just flash in the parking lot, get inspected, flash back to my tune and go! |
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05-12-2015, 11:05 AM | #6 | |
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Thankfully my car is MI registered, not CA. Though I'm pretty certain a sniffer won't register out-of-bounds emissions. I had my NP fp/op fitted with a hi-flow cat, not "no cat", and the car is tuned for power (so a bit leaner than stock tune), so its more efficient than stock. And yeah, visual inspection probably won't catch it, as I'm only catless at the header, not the FP.
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05-12-2015, 11:39 AM | #7 | |
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It's pretty crazy when you put the stock rom back on and drive with your mods. I forgot how slow and less noisy that tune is, lol. |
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