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GR86 General Topics (2nd Gen 2022+ Toyota 86) General topics for the GR86 second-gen 86 |
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01-11-2022, 10:47 PM | #1 |
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Question about headers and exhaust
Do all of the 1st gen headers and exhaust fit the 2nd gen? Someone said only the catback exhaust will fit? Thanks in advance
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01-11-2022, 11:21 PM | #2 |
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i've heard the opposite - that the headers bolt right up. However, the bigger question is whether first gen headers provide improvements over the oem header. Car is still so new with many people waiting to get theirs because of supply issues so not a whole lot of information yet a lot of people that were able to get one are still in break-in phase prior to modding
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01-12-2022, 02:07 AM | #3 | |
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01-12-2022, 05:46 AM | #4 |
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Apparently the 2nd gen header flows decently for an OEM piece and is already slightly unequal length to improve the torque dip. Personally I will be waiting for a header designed specifically for the 2nd gen. There’s no rush.
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01-12-2022, 08:49 AM | #5 |
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Headers swap over almost*** universally. Lots of information floating in the BRZ 2nd gen subsection.
Here's a reasonably indepth comparison of the OEM BRZ 2022 Header vs Borla UEL header. With the video starting at the dyno comparison: The channel also does an interesting comparison of the 2.0 Header vs the 2.4 Header bolted to the FA20. Looks like our 2nd gens used some exhaust tuning to deal with the torque dip. |
01-13-2022, 01:10 AM | #6 | |
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01-13-2022, 01:18 AM | #7 |
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They swap but until there is a tuning solution they won't make much of a difference beyond sound.
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01-15-2022, 02:45 AM | #8 |
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01-22-2022, 02:19 AM | #9 |
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Car seems to be under rated compared to the last gen, 205-209 hp vs 165 on the fa20. So we may not have as much room for improvement this round.
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01-23-2022, 05:35 PM | #10 |
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Some of the runner sizes I have seen for the previous GEN. Aftermarket headers are
≤ to the 2.4 OEM header. I would expect any headers for the 2.4L to be slightly larger. But only once there is a tuning solution and the R&D put in we will truly not know.
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01-24-2022, 11:00 AM | #11 | |
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Besides, header hp/torque increase from Gen 1 mostly comes from removing the cats or replacing with high flow cats as well as tuning solutions that don't have the same constraints stock tuning does. I personally expect a similar percentage-wise increase from decatted headers, tune, and e85 on Gen2 that we had on Gen1. |
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01-24-2022, 03:10 PM | #12 |
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Tuning with pump gas and no parts was maybe 10 hp. Full exhaust with a one cat system would net roughly 30 hp from stock as well as remove the infamous dip.
If the 2nd gen stock manifold has a freer flowing design then less hp may be available when tuning. It also is closer to flywheel hp stock meaning there might be less available to optimize with.
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01-24-2022, 03:34 PM | #13 | |
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We also know that there is no real problem with the flow of the stock headers on Gen1 as decatted Gen1 stock headers performed almost identically to most aftermarket decatted headers. The real issue, as well as the reason for the torque dip, was the combination of catted headers and a tune that was created to meet emissions using 91 or 93 octane gas. As we all know, if you don't care about emissions, improve header flow, and tune specifically for e85 octane, you can get a pretty significant HP/TQ jump on Gen1 and there is no reason to believe you won't be able to get a very similar (maybe a little less, percentage-wise or maybe a little more) jump for Gen2. As for your second point, how in the world do you know that wheel HP is closer to flywheel HP on 2ndGen than it was on 1stGen?? More importantly, you realize that decatting the headers and then tuning for decattted headers and e85 gas changes the flywheel HP, right? It has nothing to do with driveline losses. As for driveline losses, once again, there is no reason to believe they aren't very similar on Gen2 as they are on Gen1. |
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01-24-2022, 03:46 PM | #14 |
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First the de catted headers did almost nothing just like borla. Other companies managed decent gains, although they were also catless. Having a mid pip high flow cat still allowed for these gains and would pass a sniffer test....
There are already several dyno charts of the new cars and they run closer to the stated hp. Most people interchange flywheel and manufacturers spec hp. The new cars are mostly 200-209 with a stock gen 1 car in the 160s which is well over a 23 hp jump. The torque dip appears to be shorter and shallower than the gen 1 as well. So yeah it seems like the new car has a better designed exhaust manifold.
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