02-06-2018, 04:50 PM | #295 | |
Super Saiyan
Join Date: Jun 2016
Drives: 9000 HP FRS
Location: Heaven
Posts: 205
Thanks: 67
Thanked 56 Times in 44 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Quote:
__________________
|
|
02-06-2018, 04:50 PM | #296 | |
Senior Member
Join Date: Apr 2017
Drives: 2017 BRZ
Location: CA
Posts: 665
Thanks: 200
Thanked 392 Times in 236 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
|
Quote:
I think you got your final numbers flipped around there. |
|
02-06-2018, 04:55 PM | #297 |
Senior Member
Join Date: Sep 2017
Drives: 2022 BRZ Limited Silver
Location: Jacksonville, FL
Posts: 2,532
Thanks: 882
Thanked 2,045 Times in 1,188 Posts
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
|
|
The Following User Says Thank You to ermax For This Useful Post: | ImAdopted (02-06-2018) |
02-06-2018, 05:34 PM | #298 |
Persona Non Grata
Join Date: Nov 2015
Drives: '15 BRZ (WRB)
Location: On the Border
Posts: 1,882
Thanks: 2,016
Thanked 2,780 Times in 1,200 Posts
Mentioned: 10 Post(s)
Tagged: 1 Thread(s)
|
In reality both should generate the same number of revolutions assuming the clutch isn't slipping and shifts are all made at the same shift points. I suspect your difference is due to my lack of precision in proposing the rpm/mph relationship. Revs per mile in any specific gear are the same regardless of road/engine speed.
edit: ignoring tire growth.
__________________
Slow is smooth, and smooth is fast
|
The Following User Says Thank You to Capt Spaulding For This Useful Post: | Ultramaroon (02-06-2018) |
02-06-2018, 06:57 PM | #299 | |
Senior Member
Join Date: Sep 2017
Drives: 2022 BRZ Limited Silver
Location: Jacksonville, FL
Posts: 2,532
Thanks: 882
Thanked 2,045 Times in 1,188 Posts
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
|
Cruising regularly at 4000 rpm
Quote:
I actually didn’t validate the ratios. I just took your numbers and did the math. Technically 90 is more like 3900 and 80 is closer to 3450. But I was under the impression you were throwing out numbers simply to validate that you and I were under the understanding that it’s total revolutions that you would be interested in. Edit: revs per mile on the wheels would be the same (excluding tire growth) regardless of speed or gear but we aren’t discussing the revs at the wheels. We are talking about revs of the engine. Or maybe again we are on the same page but confusing each other. Hahaha |
|
02-06-2018, 09:14 PM | #300 |
Member
Join Date: May 2016
Drives: FRS, Camry
Location: West Palm Beach
Posts: 58
Thanks: 812
Thanked 47 Times in 23 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
I need Engineering Explained to make sense of this argument on a YouTube video for me
|
02-06-2018, 09:17 PM | #301 | |
Persona Non Grata
Join Date: Nov 2015
Drives: '15 BRZ (WRB)
Location: On the Border
Posts: 1,882
Thanks: 2,016
Thanked 2,780 Times in 1,200 Posts
Mentioned: 10 Post(s)
Tagged: 1 Thread(s)
|
Quote:
__________________
Slow is smooth, and smooth is fast
|
|
02-06-2018, 09:38 PM | #302 |
Senior Member
Join Date: Jun 2014
Drives: frs
Location: Gunsai
Posts: 4,877
Thanks: 7,155
Thanked 2,922 Times in 1,769 Posts
Mentioned: 23 Post(s)
Tagged: 2 Thread(s)
|
|
02-06-2018, 09:49 PM | #303 |
Senior Member
Join Date: Jun 2017
Drives: BRZ Yellow, 2019 Ranger, 2011 Evora
Location: Dallas
Posts: 1,686
Thanks: 352
Thanked 1,475 Times in 771 Posts
Mentioned: 14 Post(s)
Tagged: 1 Thread(s)
|
This is a crazy thread, I have not read all of it but think everyone is missing a lot of what goes on in an engine. An engine spinning twice as fast with the same power output will have lower internal cylinder pressures. This will cause less wear on rings and bearings. The statement that an engine spinning 2X the RPM will see 2X the wear is not a true statement.
|
The Following User Says Thank You to Grady For This Useful Post: | Ultramaroon (02-06-2018) |
02-06-2018, 10:32 PM | #304 | |
Senior Member
Join Date: Sep 2017
Drives: 2022 BRZ Limited Silver
Location: Jacksonville, FL
Posts: 2,532
Thanks: 882
Thanked 2,045 Times in 1,188 Posts
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
|
Cruising regularly at 4000 rpm
Quote:
And if you read the thread you would see that no one said it doubles. But what makes you say the pressures drop? We don’t have a dynamic compression ratio. |
|
The Following User Says Thank You to ermax For This Useful Post: | humfrz (02-06-2018) |
02-06-2018, 11:48 PM | #305 |
Senior Member
Join Date: May 2013
Drives: 2013 FR-S, white, MT
Location: Puyallup, WA
Posts: 29,879
Thanks: 28,805
Thanked 31,847 Times in 16,435 Posts
Mentioned: 708 Post(s)
Tagged: 2 Thread(s)
|
|
02-06-2018, 11:58 PM | #306 | |
Senior Member
Join Date: May 2013
Drives: 2013 FR-S, white, MT
Location: Puyallup, WA
Posts: 29,879
Thanks: 28,805
Thanked 31,847 Times in 16,435 Posts
Mentioned: 708 Post(s)
Tagged: 2 Thread(s)
|
Quote:
About "everyone is missing a lot of what goes on in an engine" ....... I would agree with IF you changed "everyone" to "some people". About your saying "lower internal cylinder pressures" ........ you totally lost me there (with this engine) ....... I believe that your last bolded statement, shows that maybe you should slow down your speed reading ...... you ain't as young as you used to be ....... humfrz |
|
The Following User Says Thank You to humfrz For This Useful Post: | Jordanwolf (02-06-2018) |
02-06-2018, 11:58 PM | #307 |
Rice King
Join Date: Jul 2017
Drives: '19 FWD master race CTR
Location: The land of the North
Posts: 2,887
Thanks: 1,079
Thanked 2,001 Times in 1,203 Posts
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
|
Aren't variable compression ratio engines like brand new?
__________________
Glorious Honda.
Know my 5x120 GREATNESS PEASANTS. |
02-07-2018, 12:07 AM | #308 | |
義理チョコ
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 31,886
Thanks: 52,163
Thanked 36,535 Times in 18,933 Posts
Mentioned: 1108 Post(s)
Tagged: 9 Thread(s)
|
Quote:
All other things being equal including power to the wheels, oil temperature follows engine speed. That means the engine is operating less efficiently. There must be real world consequences to dumping that much more heat through the engine to extract the same mechanical power. I just don't know how to correlate a higher operating temperature to a higher rate of engine wear.
__________________
|
|
The Following User Says Thank You to Ultramaroon For This Useful Post: | Spuds (02-07-2018) |
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Opti - coat 2.0 (pro) vs waxing regularly | radroach | Cosmetic Maintenance (Wash, Wax, Detailing, Body Repairs) | 34 | 01-19-2018 09:39 PM |
Who else regularly checks BaT? | NWFRS | Other Vehicles & General Automotive Discussions | 8 | 08-16-2014 12:02 AM |
High rpm cruising in 6th | abutterman | Issues | Warranty | Recalls / TSB | 12 | 03-22-2013 07:38 AM |
Fr-S w/ Evo X cruising in SoCal | NGabriel89 | FR-S & 86 Photos, Videos, Wallpapers, Gallery Forum | 4 | 09-12-2012 06:19 PM |
JRP FR-S/BRZ build up (regularly updated) | Stav | CANADA | 5 | 07-14-2012 04:21 PM |