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Thread: rpm @ 100 of civic pros?

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    Default rpm @ 100 of civic pros?

    well i dont really go till that speed in city, but while coming down from fly over, i used to notice that at 100-110, rpm is at around 2.2 or 2.4k i think
    but now while i was on expressway, i noticed that at 100, rpm was at around 2.6 or 2.8k, is it the normal rpm at this speed or is my gear not shifting to 4th gear?
    since i was accelerting very slowly so i didnt had much time to look at cluster n had to see on road as well, but i tried many times to reach 100 to notice again but due to slow acceleration i couldnt notice it exactly

    ac was off

    car is civic 05 auto


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    At 120kms its around 3k so at hundred it should be around 2.4-2.6k.
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    At 120 rpm of PT is at 2400. But sometimes when going down a slope it does not shift into high gear. So you were probably in fourth gear.

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    RPM at 120 is 3000 and at 100, it's 2500 exact... with locked torque converter.
    The difference in rpm that u r feeling is because of locked/unlocked torque converter. Nothing to worry about. It's just a little adjustment that transmission does when going uphill/downhill.

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    Quote Originally Posted by warewolf1 View Post
    RPM at 120 is 3000 and at 100, it's 2500 exact... with locked torque converter.
    The difference in rpm that u r feeling is because of locked/unlocked torque converter. Nothing to worry about. It's just a little adjustment that transmission does when going uphill/downhill.

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    Bro which prosmatic are you talking about. Reborn or eagle eyes

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    ^
    Civic 2001 vti orial prosmatec...
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    actually i got its tuning done as well few weeks ago, air filter cleaned, plugs changed, throttle body done, n at slow speeds i was kind of feeling at that time if car is kind of giving jerks or like pushing me back, i dont know how to explain it
    maybe fresh throttle body done kind of thing but it was only on petrol, nothing on cng,i tried only few km on petrol

    maybe rpm is correct as at that time i used to pick speed while coming down from fly over n then maintaining that speed + increasing on straight road, even at 110 rpm used to be at 2.4 or 2.5k but yesterday it was all just straight road

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    5th gear:

    3.1 => 100 km/h
    2.6 => 80 km/h
    2 => 60 km/h

    Wondering how come your car has comparatively low rpm at same speeds? I know its A/T but shouldn't it be actually higher then manual?

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    Seems about right. While coming down the slope you will always have lower RPMs as compare to leveled cruising.

    If you are running CNG, RPMs will be different (higher) to compensate for power loss.

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    2.5 ~ 100kmph on level road AT

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    Quote Originally Posted by fahadwizz View Post
    Seems about right. While coming down the slope you will always have lower RPMs as compare to leveled cruising.

    If you are running CNG, RPMs will be different (higher) to compensate for power loss.
    i don't think so since transmission is directly coupled to wheels so whatever fuel you use, rpm in relation to speed (i.e gear ratios) should remain same.
    to compensate for loss it will simply consume more fuel

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    Quote Originally Posted by HellsGuardian View Post
    5th gear:

    3.1 => 100 km/h
    2.6 => 80 km/h
    2 => 60 km/h

    Wondering how come your car has comparatively low rpm at same speeds? I know its A/T but shouldn't it be actually higher then manual?

    The answer is torque converter. Simply put, it acts as a fifth gear. At 120 km/hr, rpm is at 3500 but it drops to 3000 when torque converter locks. Similarly, rpm at 100km/hr is 3000 but drops to 2500 when torque converter locks.


    Quote Originally Posted by ToxicDevil View Post
    2.5 ~ 100kmph on level road AT
    +1

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    Quote Originally Posted by HellsGuardian View Post
    i don't think so since transmission is directly coupled to wheels so whatever fuel you use, rpm in relation to speed (i.e gear ratios) should remain same.
    to compensate for loss it will simply consume more fuel
    Not true...

    if u were right, how do you think the engine would react going uphill on a prosmatec? keep shifting into higher gear?

    With CNG, the engine produces lesser power at particular RPMs resulting in increased load due to which transmission may shift at higher rpms.

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    At 100 Km it should be somewhere between 2.4K to 2.8K, as on 120 Km it is 3.0K, that is in my case,
    P.S. Vehicle Honda Civic 2005 EXI PROSMATIC

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    Quote Originally Posted by fahadwizz View Post
    Not true...

    if u were right, how do you think the engine would react going uphill on a prosmatec? keep shifting into higher gear?

    With CNG, the engine produces lesser power at particular RPMs resulting in increased load due to which transmission may shift at higher rpms.
    nevermind i was talking about manual

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    Quote Originally Posted by HellsGuardian View Post
    5th gear:

    3.1 => 100 km/h
    2.6 => 80 km/h
    2 => 60 km/h

    Wondering how come your car has comparatively low rpm at same speeds? I know its A/T but shouldn't it be actually higher then manual?
    auto has 4 gears n still its rpm is lower as compared to manual, dont know why

    well i noticed that rpm is same on petrol n cng as well at different speeds though when cng setting was set to economy then i had to push alot to pick speed

    so this rpm is fine n nothing to worry about
    i normally dont go to that speed so never noticed this, n kept taking foot off the race to let it shift to higher gear lol

    Quote Originally Posted by fahadwizz View Post
    Seems about right. While coming down the slope you will always have lower RPMs as compare to leveled cruising.

    If you are running CNG, RPMs will be different (higher) to compensate for power loss.

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    [QUOTE=warewolf1;4371001]The answer is torque converter. Simply put, it acts as a fifth gear. At 120 km/hr, rpm is at 3500 but it drops to 3000 when torque converter locks. Similarly, rpm at 100km/hr is 3000 but drops to 2500 when torque converter locks.


    Torque converter? I always thought its 5 speed auto well if its the case than should a car still accelerate when the torque converter locks?
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    It does accelerate with locked torque converter but requires a light foot. If pressed a bit hard, torque converter unlocks and car accelerates better.

    Don't know the technical working of a torque converter so can't comment on whether it SHOULD accelerate with locked torque converter or not. Any expert to please explain its working???

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    Torque converter? Forgive me but its not what you are saying... torque converter is just a hydraulic pump + turbine. Its a way of transferring power.

    What you are referring to i guess is the over drive gear used in many autos for cruising. But again i might be wrong since i dont know if civic has it or not

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    Nopes. Not talking about overdrive gear. Overdrive is the final gear in any car, as per my understanding (I may be wrong)
    I am talking about torque converter. It FEELS like next gear is engaged... U know, now we need some expert here to clear things for us. Can u tag @Xulfiqar please. I don't know how to tag anyone on tapatalk.

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