02-06-2021, 11:19 AM | #57 | |
Drives: 2016 Camaro 2SS Join Date: Apr 2017
Location: Stansbury Park, Utah
Posts: 1,092
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If you want to shift at 6800 for every shift...then why can't we just leave the mph like at 20 and just set the rpm for every shift at 6800. That's what you're saying. Ok, we hit the required mph (20) so lets initiate the shift and then complete it at 6800. I don't think it'll work. I think it'll short shift. I'm no expert by any means. I think the shifting is more complicated than initiate at a set mph and complete at set rpm. If it was that simple..we could just set the shift points by rpm we wanted and leave the mph at the low stock setting. I think you want your desired shift mph and rpm to be as close to accurate as possible so the shift happens quick.
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2016 2SS, MRC, NPP, A8. Procharger P-1X,Stage II,std bypass, 3.9, Alky Meth - 10.84 @129 - DA+2000
New Mods - GPI drop ins, Kooks 2", LT4 fueling, Cam, Circle D Converter, 3.5 pulley & dual nozzle meth. Last edited by grampa_ss; 02-06-2021 at 11:54 AM. |
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02-06-2021, 12:39 PM | #58 |
Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,860
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With my Camaro we always short shifted out of low at 6400 rpm and then 6800 on out. My car made about 800 lbs of torque so get out of 1st quicker at a lower rpm and it kept the car from wanting to break the tires loose in second. I'd want the tallest tire on a A10 as possible, just my 2 cents worth.
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2022 Lt1 6.2 A10, Maggie 2300, THPSI Port Inj/10 rib, Rotofab, E, Nickey, SCOL, Griptech, RC Bandits, Hoosiers/MT 9.80@142.96 1.44 60ft, 6.34@112 707/669 RWHP/TRQ. 16SS Maggie 2650 9.41@147 1.35 60ft, 5.99@119. 16 C7 A8 10.90@128 Bolt on stuff
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02-06-2021, 12:57 PM | #59 | |
Drives: C6 Vette Join Date: Jul 2008
Location: NC
Posts: 88
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02-06-2021, 01:12 PM | #60 | |
Drives: C6 Vette Join Date: Jul 2008
Location: NC
Posts: 88
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02-06-2021, 01:29 PM | #61 | |
Drives: 2024 Toyota Camry XSE Join Date: Sep 2017
Location: South Texas
Posts: 155
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2016 1SS - Bought: 8/2017 Sold: 12/2023
Last edited by Yosh6; 02-06-2021 at 02:41 PM. |
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02-06-2021, 02:30 PM | #62 | |
Drives: 2024 Toyota Camry XSE Join Date: Sep 2017
Location: South Texas
Posts: 155
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First off, let me make the same claim as grandpa_ss - I'm no expert by any means. What I know about this comes from the limited material you can find to read about the 8L90 and conversations with my tuner, who by the way, IS the expert. There is a lot of room for misunderstanding and speculation about what MPH Initiated and RPM Completed actually means. It does not mean the shift begins with one and ends with the other in terms that would result in a long, slow shift. It has NOTHING to do with how quickly the transmission shifts from one gear to the next. The 3-4 shift in my car that initiates at 72 MPH and completes at 75-76 MPH hits like a sledge hammer, it is not a slow shift and neither are any of the others. What happens in that time interval? What is the transmission doing? I have no idea. All I know is the Trans Current Gear PID in HP Tuners turns from 3 to 4 at 72 MPH, so something electronically happens but nothing mechanically happens that I can detect. At 75-76 MPH (6543 RPM) the transmission makes the 3-4 shift crisply. Honestly, logging the shift initiation RPM is probably a waste of time. What we are all after is a target shift completion at a certain RPM and/or MPH. I like to see as much data as possible; that's not for everyone. Short shifting, in my view, would be getting either a completed shift sooner than you want or an intentional shift earlier than "normal". As for initiation being short shifting, since nothing really happens at initiation in terms of a mechanical gear change; no, don't think you can call that short shifting.
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2016 1SS - Bought: 8/2017 Sold: 12/2023
Last edited by Yosh6; 02-21-2021 at 06:35 AM. |
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02-06-2021, 03:20 PM | #63 | |
Drives: C6 Vette Join Date: Jul 2008
Location: NC
Posts: 88
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Good info. Thx. I’ve got a 10 speed so my shift points would be different.
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