Rev to 9000rpm???

[tinkerbell]

Your comment was still wrong .

yes, maybe it should be "you should shift so that you end up above the peak torque in the next gear..."

my intended effort was to indicate to zarkardos that even though peak power is at 7800, you should still go past this to ensure you are in the meat of the torque band in the next gear...

[00dc2]

are you telling me you dont change gears at max revs when you race tinkerbell? if so then wow.. your going to get even faster when you start making the most of your engine

[tinkerbell]

anyone know about Newtonian Kinematics?

http://www.welltall.com/ymc/discovery/car/shiftpt.html

[ChargeR]

yes, maybe it should be "you should shift so that you end up above the peak torque in the next gear..."

my intended effort was to indicate to zarkardos that even though peak power is at 7800, you should still go past this to ensure you are in the meat of the torque band in the next gear...

Yes you should go past it. I think it is best to say that you should always stay in a gear until the next gear would give superior acceleration. In our hondas it will almost always be at red line. Your comment earlier suggests that engine torque is important however it is the tractive effort accelerating the car that really matters as you obviously know. If my engine made peak torque of 200Nm at 6000rpm tailing off linearly to 140Nm of torque at 12000rpm I would still rev it that high if it didn't blow up , because it would give superior acceleration by being able to use shorter gears.

anyone know about Newtonian Kinematics?

http://www.welltall.com/ymc/discovery/car/shiftpt.html

I have a passing familiarity . That skyline is an interesting case in that the engine torque falls off so dramatically. I imagine it is very rare in a honda with a relatively stock rev limit to encounter a similar case .

that doesnt mean they are running lean!

I would have thought that it might be an indication of oil getting past the rings with the sudden reduction in cylinder pressure from no fuel and hence no combustion? I have seen a couple of B series cars puff blue smoke on gear changes.

[tinkerbell]

are you telling me you dont change gears at max revs when you race tinkerbell?

i know what i meant

sorry i was unable to express my comment in a way that is hard to misconstrue...

[Chi]

i know what i meant

sorry i was unable to express my comment in a way that is hard to misconstrue...

You're doing it again, using words that the majority of people would not understand

[ChargeR]

i know what i meant

sorry i was unable to express my comment in a way that is hard to misconstrue...

Pretty hard to misconstrue this : "you should shift so that you end up in the peak torque in the next gear..." (Tinkerbell, 2008). I would say the implications of that statement are pretty clear.

J/K don't ban me .

[00dc2]

anyone know about Newtonian Kinematics?

http://www.welltall.com/ymc/discovery/car/shiftpt.html

i dont think he modelled the power and torque correctly. Looking at the power curve it doesnt look like it falls much at all... i still think revving it to the end of the curve shown would be best as you want to maximise the power output of your engine.

the power output of your engine translates into kinetic energy that makes your car move faster. the higher the engine power output the more energy is translated into the cars kinetic energy thus the acceleration is maximized.

[freakygeek]

Fark.... I already answered up further yet nobody has commented?

Shifting at peak power is slower than shifting just past peak power... provided that, as others have said, the power drop after the peak is not too severe (it isn't in a DC2R... )

[tinkerbell]

yeah, spot on everyone except me.

refer you to post #50 if you would like to know where i tend to shift (even in a Jazz).

it has been fucked here at work and the peak torque comment was so pathetic and lazy that i should be ashamed.

nb - no sarcasm, i am sorry

anyone who quotes the above in a sig get a ban.

[00dc2]

nb - no sarcasm, i am sorry

anyone who quotes the above in a sig get a ban.

LOL

oh tinks... you've helped so many people so many times (incl me) there is no reason to be sorry!

we all have our moments...

[scheung]

I agree.

Manager... not mechanic.

he sounds like a moron.

I think he will know more then u keyboard mechanics....

The smoke blowing out was a result of the car running lean.

wtf....i have heard if ur blowing out smoke that means ur car is running rich?

[Chi]

I think he will know more then u keyboard mechanics....

I've seen Honda mechanics over tighten bolts, left oil filters loose, over filled oil etc etc for services of many mates cars.

They work at Honda but still dunno crap.

[l3vnd1]

wtf....i have heard if ur blowing out smoke that means ur car is running rich?[/QUOTE]


Ok lean is a bad choice of word.

Because there is fuel CUT; the car puffs smoke @ the rev limiter.

I used the word lean as lean refers to more air, less fuel mixture.

Right or wrong?

[00dc2]

more air less fuel does mean lean.. but that might not be what is going on when you hit the limiter...

running too lean is dangerous for the engine esp at high revvs so i am guessing that the rev limiter works differently to the "fuel cutoff" that people talk about..