MINI2

morrisminiminor · Aug 13th, 2003, 09:06 PM

There has been some discussion in the past about this but for all the MINIs, At what speed should you change up to the next gear to obtain the best acceleration figures and does it vary much between models?

morrisminiminor

Z1GZAG N · Aug 14th, 2003, 12:19 AM

MPH as nothing to do with strong acceleration. RPM, is what matters. At what rpm you shift to the next gear depends on the gear ratio difference from one gear to the next. You want the revs high enough that when you catch the next gear, the motor doesn't have to struggle to get back up into the power band. Typically, you rev the motor past the peak hp rpm range so it's already to pull hard in the next gear.

scooterboy · Aug 14th, 2003, 03:58 AM

It's also going to vary between the One, the Cooper, and the S.

Personally, I hit at least 4K rpm and often approach 6K before shifting in my Cooper.

randap · Aug 14th, 2003, 09:22 AM

AFAIK, and this is from my m/cycle knowledge (high power low torque engines, like the Mini), is that performance engines / gearbox combos are designed such that if you shift when the engine reaches peak power (6k in MC), you're engine will drop to the peak torque RPM thus giving max thrust in the next gear.

Therefore, if you want max performance, you should shift at whatever your peak power RPM is.....

cristo · Aug 14th, 2003, 01:45 PM

If you look at the power curves for the MC, it would appear that optimum
shift points for max power and accel would be
take 1st to redline (6750)
take 2nd to redline (6750
take 3rd to 6600
take 4th to 6500.

I don't know what the redline is on the One or the MCS, but their
power curves don't fall off that much after peak power, and I suspect
the strategy would be about the same for them.

Polmear · Aug 14th, 2003, 07:43 PM

Watch how your car drops RPM from 1st to 2nd and so on-my MCS drops around 1000 1st to 2nd, so I rev to about 5500, shift, RPM's drop to 4500-max torque, most acceleration. Also gives the tires a nice chirp!

ipartridge · Aug 14th, 2003, 11:57 PM

Quote: Originally Posted by Polmear

Watch how your car drops RPM from 1st to 2nd and so on-my MCS drops around 1000 1st to 2nd, so I rev to about 5500, shift, RPM's drop to 4500-max torque, most acceleration. Also gives the tires a nice chirp!

Wish my cooper would do that

Chirp i mean

Z1GZAG N · Aug 15th, 2003, 12:52 AM

Chirp i mean[/quote]

Turn the A/C and DSC off. The DSC will kill your acceleration as soon as the tires break loose and you just can't believe how much power the A/C sucks until you've used it straight for a week or two and then shut it off.

Aug 13th, 2003, 09:06 PM	#1
morrisminiminor MINI2 Senior Join Date: Jul 2002 Location: Bonnie Scotland. Local Time: 01:29 AM Posts: 367 Offline	Which Gear@What Speed For Best Acceleration There has been some discussion in the past about this but for all the MINIs, At what speed should you change up to the next gear to obtain the best acceleration figures and does it vary much between models? morrisminiminor

Aug 14th, 2003, 03:58 AM	#3 (permalink)
scooterboy MINI2 Master Join Date: Mar 2003 Location: NH Local Time: 08:29 PM Posts: 792 Offline	It's also going to vary between the One, the Cooper, and the S. Personally, I hit at least 4K rpm and often approach 6K before shifting in my Cooper. My MINI Mods

Aug 14th, 2003, 01:45 PM	#5 (permalink)
cristo BLIKSEM (my brg/brg mc) Join Date: Mar 2003 Location: york, pennsylvania Local Time: 07:29 PM Posts: 2,213 Offline	If you look at the power curves for the MC, it would appear that optimum shift points for max power and accel would be take 1st to redline (6750) take 2nd to redline (6750 take 3rd to 6600 take 4th to 6500. I don't know what the redline is on the One or the MCS, but their power curves don't fall off that much after peak power, and I suspect the strategy would be about the same for them. Last edited by cristo : Aug 14th, 2003 at 10:00 PM.

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Aug 14th, 2003, 12:19 AM	#2 (permalink)
Z1GZAG N MINI2 Master Join Date: May 2003 Location: Hurricane Alley, FL Local Time: 07:29 PM Posts: 1,431 Offline	MPH as nothing to do with strong acceleration. RPM, is what matters. At what rpm you shift to the next gear depends on the gear ratio difference from one gear to the next. You want the revs high enough that when you catch the next gear, the motor doesn't have to struggle to get back up into the power band. Typically, you rev the motor past the peak hp rpm range so it's already to pull hard in the next gear.

Aug 14th, 2003, 09:22 AM	#4 (permalink)
randap Hangin at the Krusty Krab My Classifieds Join Date: Jun 2003 Location: Bikini Bottom Local Time: 12:29 AM Posts: 860 Offline	AFAIK, and this is from my m/cycle knowledge (high power low torque engines, like the Mini), is that performance engines / gearbox combos are designed such that if you shift when the engine reaches peak power (6k in MC), you're engine will drop to the peak torque RPM thus giving max thrust in the next gear. Therefore, if you want max performance, you should shift at whatever your peak power RPM is.....

Aug 14th, 2003, 07:43 PM	#6 (permalink)
Polmear MINI2 Regular Join Date: May 2003 Location: Michigan Local Time: 08:29 PM Posts: 276 Offline	Watch how your car drops RPM from 1st to 2nd and so on-my MCS drops around 1000 1st to 2nd, so I rev to about 5500, shift, RPM's drop to 4500-max torque, most acceleration. Also gives the tires a nice chirp!

Aug 14th, 2003, 11:57 PM	#7 (permalink)
ipartridge MINI2 Regular Join Date: Mar 2003 Location: Shepshed, Where ? Local Time: 01:29 AM Posts: 155 Offline	Quote: Originally Posted by Polmear Watch how your car drops RPM from 1st to 2nd and so on-my MCS drops around 1000 1st to 2nd, so I rev to about 5500, shift, RPM's drop to 4500-max torque, most acceleration. Also gives the tires a nice chirp! Wish my cooper would do that Chirp i mean

Aug 15th, 2003, 12:52 AM	#8 (permalink)
Z1GZAG N MINI2 Master Join Date: May 2003 Location: Hurricane Alley, FL Local Time: 07:29 PM Posts: 1,431 Offline	Chirp i mean[/quote] Turn the A/C and DSC off. The DSC will kill your acceleration as soon as the tires break loose and you just can't believe how much power the A/C sucks until you've used it straight for a week or two and then shut it off.

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