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MT best shift point/RPM

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  #41  
Old 07-20-2023, 08:29 PM
Join Date: Jun 2023
Location: mi
Posts: 30
Originally Posted by Breezer
My shifts vary greatly in rpm depending on the circumstances at the time.
But I have never even once taken my car to 6000 rpm, much less to redline.
Very very rarely it might hit 5000 or just over.
Normal driving i shift between 2500 and 3500 rpm, if needing to accelerate quicker, or climbing a steep hill, then 4500 ish.
Maybe once a year, for 1 second, it sees 5000 rpm.
I'm not in that much of a rush to get anywhere.
Its "kind" of you but any modern built car with good stock oiling (like 90% of cars, any Honda i can think of) you absolutely do not have to do this, the redline is already pretty well below what the engine can take by fair margin.
Originally Posted by TnTkr
In GK Fit/Jazz the most fun is between 4000 and redline, and shifting just before cutoff gives defenitely the best acceleration. I want that joy daily. Best fuel economy comes by following the shift indicator arrow, which suggests keeping the rpm below 2000 unless in uphill.
Trick you can do if you need a bit of quickness, want to save gas but don't want to drive complete grandma mode is just look up engagement points for variable intake/vtec, whatever the engine has, in Fits case two stages first is at either 2800 at heavy throttle or as high as 3400 at low throttle, second 5000 or so iirc, in this case just keep it below 2800-3400 and it becomes real hard to ever hurt your fuel economy.
 

Last edited by boof unofficial; 07-20-2023 at 08:35 PM.
  #42  
Old 07-21-2023, 12:50 AM
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Join Date: Apr 2020
Location: Finland
Posts: 420
Originally Posted by boof unofficial
Trick you can do if you need a bit of quickness, want to save gas but don't want to drive complete grandma mode is just look up engagement points for variable intake/vtec, whatever the engine has, in Fits case two stages first is at either 2800 at heavy throttle or as high as 3400 at low throttle, second 5000 or so iirc, in this case just keep it below 2800-3400 and it becomes real hard to ever hurt your fuel economy.
That's an interesting piece of information. Where can you find the confirmed rpm for the second stage? I'm asking because when (not if ) accelerating at full throttle from below 1500 rpm until redline it feels like the engine gets boost at around 4000 rpm.
 
  #43  
Old 07-28-2023, 07:15 PM
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5 Year Member
Join Date: Jul 2009
Location: CA
Posts: 82
Originally Posted by TnTkr
That's an interesting piece of information. Where can you find the confirmed rpm for the second stage? I'm asking because when (not if ) accelerating at full throttle from below 1500 rpm until redline it feels like the engine gets boost at around 4000 rpm.
Look at dynos. People have seen and heard changes between about 2.0~3.5K RPM.
Tap rocker control arm solenoid, etc ECU signals if you want to confirm.
 
  #44  
Old 08-05-2023, 08:46 PM
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Join Date: Jun 2021
Location: Canada
Posts: 208
Mine gets a nice little power boost around 3700 rpm, i assumed that was when the vtec was engaging.
 
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