MINI Cooper S with John Cooper Works G_P Tuning Kit

[Fabio]

what about this part
"Modifications to the intercooler as well as engine tuning measures have increased power output of the supercharged 1.6-litre engine on a standard MINI Cooper S JCW by 8bhp"

[LMB]

Quote: Originally Posted by Fabio

what about this part
"Modifications to the intercooler as well as engine tuning measures have increased power output of the supercharged 1.6-litre engine on a standard MINI Cooper S JCW by 8bhp"

My understanding was Torque was key figure as it was the amount of power at the wheels. From what I've read both the 210 JCW and GP have the same max torque at the same revs. The rev limit does seem to have been raised slightly, which seems to be where the extra bhp has come from. But I don't understand the benefits.

[LMB]

Quote: Originally Posted by MINIAC

I believe it's what was originally posted for the GP.


Edit ...

MINI USA is showing torque at 184ft-lb (250Nm) but with disclaimer



NOTE: Horsepower figure is "actual" not metric

So it quotes a lower bhp (UK 218) but a higher Torque....wtf??

[MINIAC]

No difference in horsepower ...

160kW = 214.5HP (US) = 217.5PS (UK)

[Fabio]

Quote: Originally Posted by LMB

My understanding was Torque was key figure as it was the amount of power at the wheels. From what I've read both the 210 JCW and GP have the same max torque at the same revs. The rev limit does seem to have been raised slightly, which seems to be where the extra bhp has come from. But I don't understand the benefits.

what your saying makes sense and its probaly what we'll get. Benifits i'm unsure of either
but hasnt top speed been quoted at 150mph???

[Paul]

Quote: Originally Posted by LMB

What I don't get is if the Max torque remains at the same Revs as the Works Kit, how is raising the Rev Limit going to help?

OK, it depends on the torque curve, they may have made improvements so the torque doesn't tail off so much so soon.

Here's some calculations for you, going roughly from the 210 curve on the JCW website, then applying guesses at a higher rev to show what BHP it might give you.

If they could improve the torque curve (but not max torque), then you could in theory get better max power, without increasing the max torque.

215 (158.5 lb/ft) x 6950 / 5252 = 209.7

214 (157.8 lb/ft) x 7100 / 5252 = 213.6

213 (157 lb/ft) x 7100 / 5252 = 212.2

-----

219 (161.5 lb/ft) x 7100 / 5252 = 218.3

[LMB]

Quote: Originally Posted by Fabio

what your saying makes sense and its probaly what we'll get. Benifits i'm unsure of either
but hasnt top speed been quoted at 150mph???

Yeah 150mph.....maybe the higher revs allow the engine to squeeze a few more mph at the higher revs. So technically it is only the top speed that is quicker? The higher revs give a few more mph in each gear, which shaves a few milliseconds of 0 - 60?

That would make sense.

[The Red Baron]

Quote: Originally Posted by LMB

That would make sense.

Or not!, according to the small print on the back of the GP brochure.

"The people, quotes and events described in this flyer are enttirely fictitious and any resembalence to actual persons, living or dead is purely coincidental"

Ehh?

[LMB]

Quote: Originally Posted by chrisandjax

Or not!, according to the small print on the back of the GP brochure.

"The people, quotes and events described in this flyer are enttirely fictitious and any resembalence to actual persons, living or dead is purely coincidental"

Ehh?

That's just general legal crap to cover their backs.

[Wobert]

Quote: Originally Posted by Wobert

Your initial comments about raising the rev limit giving the power increase appear to be correct.

I've used the power / torque curves listed on the JCW website for a std MCS with the 210 bhp conversion, and have extrapolated power and torque values across the full speed range.

I've also derived the values using simple equations to check my accuracy of extrapolation.

Bearing in mind the torque curve on a standard JCW MCS falls away fairly gradually, by increasing the peak power speed by 100 rpm gives the final 8 bhp (5.96kW) over and above the std JCW engine.......this will only be done via modifying the ECU programming.

This is the post I originally made about the issue with raising the rev limit by 100 rpm.......

[LMB]

Quote: Originally Posted by Wobert

This is the post I originally made about the issue with raising the rev limit by 100 rpm.......

What are the advantages of increasing the range? Allowing greater speed per gear?

[Wobert]

Quote: Originally Posted by LMB

What are the advantages of increasing the range? Allowing greater speed per gear?

Assuming the gearing stays the same, yes.........

In reality, it's just a cheap way of increasing the headline power figure for minimal effort / technical risk, as all the engine sub-systems will be rated far, in-excess in terms of their speed limits.....so you're not risking durability issues in terms of long term engine longevity.

100-150 rpm is pretty minimal TBH.........and it's easy to implement too, as it would only need an ECU program tweak to achieve.

[jimskater]

I think I need a GP brochure.

None available in the US, yet.

[LMB]

Quote: Originally Posted by Wobert

Assuming the gearing stays the same, yes.........

In reality, it's just a cheap way of increasing the headline power figure for minimal effort / technical risk, as all the engine sub-systems will be rated far, in-excess in terms of their speed limits.....so you're not risking durability issues in terms of long term engine longevity.

100-150 rpm is pretty minimal TBH.........and it's easy to implement too, as it would only need an ECU program tweak to achieve.

Ok cheers that makes sense.

I guess the weight of the car is going to have a greater impact than the increased bhp.

[jimskater]

TBH, I've only ever bumped the rev limiter on the S maybe a dozen times.

I'm just looking forward to the jcw kit, the lsd & the reworked gearbox.