Maximum RPM in Park mode

Jay.DeVries

Yee Yee
Joined
Apr 28, 2016
Threads
35
Messages
286
Reaction score
359
Location
Sioux Falls, SD
Vehicle(s)
2016 Honda Civic EX-T, 2017 Honda Civic Hatchback Sport
In a perfect world you're right, but we're not talking about a perfect world here. Computers have a sample rate and an algorithm to run in order to make the decision to cut off or limit the fuel or spark or whatever the programmer coded (how soon after shifting to neutral or missing a shift does the computer decide to limit rpm by whatever method (one sample, two, twenty? and at what sample rate?) - you wouldn't tolerate a false alarm while trying to pass someone with a semi coming at you would you?).
In the real world the car won't go faster (mph), but the engine (rpm) will.
Try this in your turbo: From a stop in gear floor it, at about 3,500 - 4,000 rpm shift to neutral with gas pedal floored and see if revs stop at the (about) 4,000 rpm neutral limit or climb well beyond.
Don't try it at higher rpm or you may toast the motor (the ECU will record the max rpm for warranty reference).
I dont think you understand how engines work. If the fuel gets cut off, then how in the world would the rpm go higher? what is creating the energy required to increase rpm?
Sponsored

 

tacthecat

Senior Member
Joined
Feb 9, 2016
Threads
6
Messages
2,069
Reaction score
891
Location
Cheshire, MA
Vehicle(s)
'12 Civic Si Sedan
Country flag
I dont think you understand how engines work. If the fuel gets cut off, then how in the world would the rpm go higher? what is creating the energy required to increase rpm?
The real world doesn't work like theory. It takes time for a computer to read sensors, figure out the situation, decide what to do and, based on what the programmer coded, how to do it - hitting the brakes doesn't stop the car, it slows down until it stops; but usually doesn't speed up unless you're going downhill on a slick surface or off a cliff. You can think of it as that 1.5 second delay between when you see a situation and you respond - what's happening, how to respond, and taking action (duck and cover, draw and shoot, or quit accelerating and brake).
 

Jay.DeVries

Yee Yee
Joined
Apr 28, 2016
Threads
35
Messages
286
Reaction score
359
Location
Sioux Falls, SD
Vehicle(s)
2016 Honda Civic EX-T, 2017 Honda Civic Hatchback Sport
The real world doesn't work like theory. It takes time for a computer to read sensors, figure out the situation, decide what to do and, based on what the programmer coded, how to do it - hitting the brakes doesn't stop the car, it slows down until it stops; but usually doesn't speed up unless you're going downhill on a slick surface or off a cliff. You can think of it as that 1.5 second delay between when you see a situation and you respond - what's happening, how to respond, and taking action (duck and cover, draw and shoot, or quit accelerating and brake).
If I were you I would do some research on how engines work, as well as how Rev limiters works. I work with those regularly. My family owns a performance shop, we build motors. That's what we do. And computers react very very fast. If you cut fuel, the Rpms WILL NOT increase.
 

dt17

Senior Member
First Name
Daryl
Joined
Nov 11, 2017
Threads
6
Messages
124
Reaction score
30
Location
Bangkok Thailand
Vehicle(s)
Civic hatchback turbo 2017
Country flag
I just managed to get 5500 rpm. I think that’s the max. Going over might be harmful
 

kshawn

Senior Member
First Name
Matthew
Joined
Apr 23, 2016
Threads
25
Messages
2,602
Reaction score
2,796
Location
Maine
Website
www.instagram.com
Vehicle(s)
2017 Civic SI
Country flag
You can set the lower rev limiters in ktuner. It's quite easy. That way you can rev up higher in park without having to risk blowing somthing up while also moving at high speed
 


Zed

Senior Member
Joined
Apr 6, 2017
Threads
19
Messages
122
Reaction score
77
Location
San Luis Obispo, CA
Vehicle(s)
6MT FK7 (Sold), 991.2 Carrera S, 3rd Gen Tacoma
Vehicle Showcase
1
Country flag
I think I might have accidentally done this once or twice. WOT in first gear, missed shift to second and went to neutral while still going full throttle. Hit 6.5K the first time, and second time with the KTuner so it went to 7k rpm. Haha
 

kshawn

Senior Member
First Name
Matthew
Joined
Apr 23, 2016
Threads
25
Messages
2,602
Reaction score
2,796
Location
Maine
Website
www.instagram.com
Vehicle(s)
2017 Civic SI
Country flag
I think I might have accidentally done this once or twice. WOT in first gear, missed shift to second and went to neutral while still going full throttle. Hit 6.5K the first time, and second time with the KTuner so it went to 7k rpm. Haha
Haha I've done this once as well. It was quite a sound hitting 7k. Engine did not like it. Nothing broke, thank God.
 

simon_lefisch

Senior Member
Joined
Sep 18, 2017
Threads
36
Messages
416
Reaction score
175
Location
SoCal
Vehicle(s)
2020 Civic Si Coupe
Country flag
Sorry to revive an old thread, but I’m having this issue as well. The reason I’m trying to get past the rev limiter is I’m adjusting my MAF curve in KTuner. @kshawn where is the option to raise the rev limiter in KTuner?
 

kshawn

Senior Member
First Name
Matthew
Joined
Apr 23, 2016
Threads
25
Messages
2,602
Reaction score
2,796
Location
Maine
Website
www.instagram.com
Vehicle(s)
2017 Civic SI
Country flag
Sorry to revive an old thread, but I’m having this issue as well. The reason I’m trying to get past the rev limiter is I’m adjusting my MAF curve in KTuner. @kshawn where is the option to raise the rev limiter in KTuner?
You talking high limit rpm or low limit? High meaning while moving, and low meaning while parked.

Edit: wait what. Why should you need to change the rpm limit to help with MAF curve adjustment? You can get a good bead of it without adjusting that, while parked. And to fine tune your gonna have to take it for a quick drive. Did you get the PRL race MAF?
 

simon_lefisch

Senior Member
Joined
Sep 18, 2017
Threads
36
Messages
416
Reaction score
175
Location
SoCal
Vehicle(s)
2020 Civic Si Coupe
Country flag
You talking high limit rpm or low limit? High meaning while moving, and low meaning while parked.
While parked is preferred
 


kshawn

Senior Member
First Name
Matthew
Joined
Apr 23, 2016
Threads
25
Messages
2,602
Reaction score
2,796
Location
Maine
Website
www.instagram.com
Vehicle(s)
2017 Civic SI
Country flag
While parked is preferred
If you adjust your low rpm limits in the tune it will change the max rpm in park. I don't recommend going past 5-6k, I feel like that's probably not good for the motor.
 

simon_lefisch

Senior Member
Joined
Sep 18, 2017
Threads
36
Messages
416
Reaction score
175
Location
SoCal
Vehicle(s)
2020 Civic Si Coupe
Country flag
If you adjust your low rpm limits in the tune it will change the max rpm in park. I don't recommend going past 5-6k, I feel like that's probably not good for the motor.
Yea I wouldn’t go past that. Only need up to redline so I can adjust the MAF curve for STFT. Thanks for pointing me in the right direction
 

kshawn

Senior Member
First Name
Matthew
Joined
Apr 23, 2016
Threads
25
Messages
2,602
Reaction score
2,796
Location
Maine
Website
www.instagram.com
Vehicle(s)
2017 Civic SI
Country flag
Yea I wouldn’t go past that. Only need up to redline so I can adjust the MAF curve for STFT. Thanks for pointing me in the right direction
That's not going to help much tho. MAF curve is not the max RPM in park. It's Air that you're flowing. You'll need to be moving and Building boost to get the logs needed to see where you must adjust. Like 0-60s. You can gather enough info in park to get close tho. Adjusting the whole MAF scale bye a percent value related to what LTFT. I wouldn't be concerned with short term trim as much. Its constantly adjusting to make corrections to please the CAT as well.
 

simon_lefisch

Senior Member
Joined
Sep 18, 2017
Threads
36
Messages
416
Reaction score
175
Location
SoCal
Vehicle(s)
2020 Civic Si Coupe
Country flag
That's not going to help much tho. MAF curve is not the max RPM in park. It's Air that you're flowing. You'll need to be moving and Building boost to get the logs needed to see where you must adjust. Like 0-60s. You can gather enough info in park to get close tho. Adjusting the whole MAF scale bye a percent value related to what LTFT. I wouldn't be concerned with short term trim as much. Its constantly adjusting to make corrections to please the CAT as well.
No I know what the MAF is. I'm trying to get as close as possible first in Park/Neutral before going on the road since4 its hard to find a long strech by my house. I did contact KTuner as I noticed that the Low Limits were greyed out. Apparently they wont show since I have a CVT. At least I have a starting point tho. Thanks for your help :D
 

kshawn

Senior Member
First Name
Matthew
Joined
Apr 23, 2016
Threads
25
Messages
2,602
Reaction score
2,796
Location
Maine
Website
www.instagram.com
Vehicle(s)
2017 Civic SI
Country flag
No I know what the MAF is. I'm trying to get as close as possible first in Park/Neutral before going on the road since4 its hard to find a long strech by my house. I did contact KTuner as I noticed that the Low Limits were greyed out. Apparently they wont show since I have a CVT. At least I have a starting point tho. Thanks for your help :D
Np. Btw why you adjusting your MAF? Im curious xD
Sponsored

 


 


Top