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-   -   M/T and idling over speed bumps - jerking (https://www.ft86club.com/forums/showthread.php?t=87518)

mstoochn 04-28-2015 10:10 PM

M/T and idling over speed bumps - jerking
 
2015 Brz sport-tech m/t, this is my first m/t car so perhaps I'm just clueless.

Whenever I go over a speed bump at low speed in gear (8-15kmph) the car will be in gear and I let it creep over the speed bump, as the car goes over the speed bump the vehicle will begin to rock (in the same manner it would if you drop the clutch at low revs) but 1st gear is engaged and my foot isn't on the clutch - is this a characteristic of the car or should I be doing something different?

Tcoat 04-28-2015 10:26 PM

Quote:

Originally Posted by mstoochn (Post 2230750)
2015 Brz sport-tech m/t, this is my first m/t car so perhaps I'm just clueless.

Whenever I go over a speed bump at low speed in gear (8-15kmph) the car will be in gear and I let it creep over the speed bump, as the car goes over the speed bump the vehicle will begin to rock (in the same manner it would if you drop the clutch at low revs) but 1st gear is engaged and my foot isn't on the clutch - is this a characteristic of the car or should I be doing something different?

You are letting the revs drop to far and it is lugging. If taking a bump that slow clutch in just before rolling over and clutch out and accelerate like normal after you g over. Never let the revs to so low that you start to shudder, "rock" or in any other way lug the engine.

chas3wba0 04-28-2015 10:40 PM

Practice more n00b ;)

mstoochn 04-28-2015 10:55 PM

Quote:

Originally Posted by chas3wba0 (Post 2230776)
Practice more n00b ;)

lol thanks, figured it was just me being a noob.

extrashaky 04-28-2015 11:23 PM

Quote:

Originally Posted by mstoochn (Post 2230792)
lol thanks, figured it was just me being a noob.

It's not like an automatic where you can just use the brake at low speed and let the engine and transmission do the work for you. At low speed you have to work the clutch, give it some gas if necessary, coast if necessary. You don't want to lug the engine because the oil pressure will drop too low and not lubricate properly, resulting in premature wear. If you have to go so slow that your RPMs drop low enough that you're lugging, clutch in and coast instead, giving it a bump as necessary to keep yourself moving.

Xuningshen 04-28-2015 11:38 PM

it takes effort to go over a bump right? how much power does the car have at idle? of course it'll bog down for a second.

chas3wba0 04-28-2015 11:45 PM

Yea depending on the size of the bump, you'll probably have to ride the clutch and give it a little throttle to go over smoothly. It's fun once you get the hang of it

stevesnj 04-29-2015 05:45 PM

2nd gear with some throttle you should be good.


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