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GR86 General Topics (2nd Gen 2022+ Toyota 86) General topics for the GR86 second-gen 86 |
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01-31-2023, 02:56 PM | #99 |
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I'd def be willing to pay for the convenience of all the parts sourced and ordered from one location, and clear instructions for assembly. Though, I am but one rando on the internet. XD
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02-01-2023, 12:35 AM | #100 | |
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Only need to connect a power, an oil pressure sender and CAN bus lines of the option connector behind the audio.
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02-01-2023, 12:54 AM | #101 | |
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02-01-2023, 07:36 AM | #102 | |
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02-01-2023, 08:41 AM | #103 | |
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Thanks for the info
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02-01-2023, 07:36 PM | #105 | |
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So its more about just how much the load of filling the accumulators is what you want to test, not so much recreating the tracks low pressure environment events and how if the accumulator stops dips past a certain level. More concerning to you is whether the pressure required to refill the accumulator makes a worse situation in high RPM, and that is what you can test on a dyno (albeit probably in a full pressure environment, not just a 'above 25psi' environment). |
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02-02-2023, 06:50 AM | #106 | |
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Correct. When the accumulator recharges, there will absolutely be an oil pressure loss to the engine, and under full load. The worst time to have ANY oil pressure drop. Is this a 5psi drop or a 25psi drop? No one knows, but physics doesn't lie. Anytime you create a hole in a pressurized system, there WILL be a pressure drop. |
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02-02-2023, 11:34 AM | #107 |
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There's a lot of corners out there that aren't at low/no load though. Half of our local tracks out here in CO have high-G, high speed corners where you are flat or nearly so through the apex.
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02-02-2023, 07:25 PM | #108 | |
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So far I've only seen data that supports starvation initiated at braking/lift/rise going into and continuing through a right-hand turn. |
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02-03-2023, 01:37 PM | #109 |
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I have no data. Just pointing out that higher-g corners could still be a high load situation.
If it is only being observed in lower load corners though then that's great. My impression was this was being seen on higher-g right hand corners, especially if there's also elevation gain happening. |
02-03-2023, 05:49 PM | #110 |
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Another part of what the accumulator may do is, at low rpm/oil pressure, it discharges some oil to create an overfull condition. This would mitigate the problem of oil moving away from the pick-up in a high G turn. There is still the issue of recharge under load but the higher the oil pressure, more pressure exists in the accumulator restricting how fast it will recharge. So, hypothetically not taking too much needed pressure from the engine internals. More testing is definitely needed.
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02-03-2023, 06:11 PM | #111 | |
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It would be nice to test this on a skidpad or something where you can load the car laterally and then mess with accel/decel to try and reproduce the pressure drop. |
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02-03-2023, 08:22 PM | #112 | |
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That would make sense. There's a couple corners on local tracks that have a short braking zone followed by a big sweeping uphill right hand corner that's pretty close to or at full throttle depending on the car. I haven't gotten to track my 86 yet (bought it during winter), but in my STi I was pretty much flat through the curve and over the rise. |
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