Hey guys, I recently noticed when i shift gears my RPM rises a lil before going down. Is this normal? If not is it because of my mods? Any info is appreciated. thanks guys...

 

Could be the way your shifting. Try removing your foot off the gas and watch the tach and then stick the clutch in. If it still does it, try a throttle position learning procedure.

 

^what he said. I think you are holding the gas a little bit when pressing the clutch. Try to left off gas and press clutch simultaneously.

 

how do you know he's MT?

 

I think it might be the clutch... mine started doing that...

I'd shift give it a lil gas.. and it would rev up.. or spike.. a lil.. then go down and rev up normally through the powerband.. It slowly got worse and worse.. till I had to replace it>>> all heavy duty now!

 

If he's AT, then I'm assuming its the lag in between shifts.

If he's MT, then I'm assuming he's either not laying off the gas before disengaging the clutch.

It could be normal, but I would have to see it to say so.

.

 

Exactly! That's why I asked do we know that he's MT?... with the slight lag in shift in MM mode on AT it will go another 100-200 rpm before shifting...that's why I kept hitting rev limiter at CA Speedway...

 

Sorry guys...i am 6MT... I will try the technique you guys talked about...Hopefully theres nothing wrong with my car

 

Yeah thats what i think is happening to me...So did you change your clutch?

 

Thats normal. Think about it. if you are shifting quickly, you don't want the rpms to drop before you put it into the next gear. You want the rpms to be consistent to give you a seamless shift...ie, no head jerking. If the rpm's dropped down immediatly after pressing the clutch, when you put it into gear, and let the clutch back out, the rpms would raise back up, giving you that downshifting at higher speeds feeling. Not to comfortable...

 

Ok i figured out it was the way i shift...but now i have another problem, When i slow down from high speeds say 60 mph and take it out of gear my rpms drop to below 250 almost to 0 then lifts back up right away...is this normal as well?

 

whenever the clutch is engaged, it stops the motor ( revolutions ) once the clutch is depressed, it allows the motor to run once more.

 

Revs after taking foot off gas and engaging clutch to change gear = normal

Revs after engaging gear and giving it gas = slipping clutch

As for the rpm drop at high speed, I haven't really paid attention to that in mine, but I'd say if it bounces back quickly then there's probably nothing wrong...