[drumzz]

Hi there,

My 170bhp S still feels fast to me, despite driving it hard on many occasions since I got it 5 months ago.
However, if i can get one mod done, I was thinking a 15% pulley, but i wanted to know if it makes an ACTUAL difference over a stock mcs.

The reason I ask, is because I have no other mods and wanted to know the sort of gains or difference in 0-60 or any other performance benchmark would be achieved?

Thanks

[Fisher]

Quote: Originally Posted by drumzz (original)

Hi there,

My 170bhp S still feels fast to me, despite driving it hard on many occasions since I got it 5 months ago.
However, if i can get one mod done, I was thinking a 15% pulley, but i wanted to know if it makes an ACTUAL difference over a stock mcs.

The reason I ask, is because I have no other mods and wanted to know the sort of gains or difference in 0-60 or any other performance benchmark would be achieved?

Thanks

You get about 15HP.

Of course it's quicker. The most you get from the pulley is much more fun.

[drumzz]

so with 15bhp, is there a real life difference,

the reason I ask is because I can be very close to keeping up with 200bhp hatches on a private strip of land nearby, such as the golf gti, when they have 30bhp more?

[sef]

You may find that you have more than 170bhp in any case... A 15% pulley will make a great difference. I got an extra 21bhp when I had mine fitted and it is very quick...

[MINI-Morgan]

Its the torque increase that give you the much stronger pull before the HP starts to really show. If you were getting an intercooler as well i'd recommend a 17% pulley

[drumzz]

thanks for the info!, so that should mean, with just a 15% pulley, it should be able to keep close to 200bhp hatches, or a jcw for example? in a straight line this is..

[Richard Crofts]

All things being equal the answer is ... YES

My car was defo faster running a 15% the day it was fitted compared to the day before ... I had nothing other than the 15% fitted on that particular day.

[JMCS08]

keeping on subject im looking to get a pully fitted in the next month what shall i go for the 17% or 15%? im runing a GRS so it will cope better i was told the 15% would have better torque low down.

[MINI-Morgan]

Still not sure where that rumour came from...... higher percentage reduction the more boost pressure the more torque. But there are limitations, more boost equals more heat and this is where the higher percentages loose there HP. As the revs come up as does the heat and so power starts to drop off.

Its a balance.... more HP(15%) or more low/mid range torque(19%)........

[JMCS08]

ok thanks its because of this rumour is why im stuck with this! now i think i know what ot get done thanks! nice power you got mate

[Richard Crofts]

The stock IC really struggles with hard driving, even on a 15% (mine did). A 17% on a stock IC will probably not give the power it should and could perform lower power than a 15% as the temps just get too high....risks of engine damge also increase. A 17% is better when you have extra cooling such as a GP or GRS or GTT intercooler though

[Damo]

Quote: Originally Posted by Richard Crofts (original)

All things being equal the answer is ... YES

My car was defo faster running a 15% the day it was fitted compared to the day before ... I had nothing other than the 15% fitted on that particular day.

What he said

[Damo]

Quote: Originally Posted by JMCS08 (original)

keeping on subject im looking to get a pully fitted in the next month what shall i go for the 17% or 15%? im runing a GRS so it will cope better i was told the 15% would have better torque low down.

17% should give more torque, and as you already have the best intercooler (IMO ) then 17% is what I'd go for (and have gone for). I wanted it for more torque vs the 15%. It would seem my car has excellent power just pants torque, so very glad I went with the 15% over the 17%.

[MINIMANIAUK]

I think it only fair to point out that smaller than 15% pulleys and lifting the red line to 7000 spins the charger beyond its rated top speed by some margin, and it will effect the life of the charger
these chargers do wear and fail
-Any internal wear will only cause the charger to become more inefficient over time,this always increases the heat produced by the charger ,and in turn increases the wear rate.
these chargers already produce very turbulent air ,which again worsens with wear.
There will be a point at which the heat generated will far exceed any intercoolers capability and cause catastrophic failure.
There are plenty of 50000 mile plus cars out there ,and the chargers are not serviced or inspected and do leak oil .
most owners are not track day driving their car and for sure cant afford catastrophic failure
losing power through heat is one thing losing the engine could spoil your day

[BigShow300]

Good job I got me a nice new teflon charger fitted... although that said I'm kind of resigned to the fact that I'll need a new engine at some point... that way when I do I won't be annoyed :-)

[BigShow300]

[Keano]

A power and torque curve of the pulleys bigshow compares would be good if anyone has one...???????? wonder how nicely the JCW pulley fits in between the OEM and 15%...

[MINI-Morgan]

Quote: Originally Posted by Keano (original)

A power and torque curve of the pulleys bigshow compares would be good if anyone has one...???????? wonder how nicely the JCW pulley fits in between the OEM and 15%...

Vs IATs also.

19% certainly pulls best but gets really hot!

[Fisher]

Quote: Originally Posted by MINI-Morgan (original)

Vs IATs also.

19% certainly pulls best but gets really hot!

With good W2A system there is not heat problem.

[J u s t]

Where would one actually source a 15% Pulley Kit from? .. and how would they know if it's a good buy, or it's too expensive?