[yianni]

Hi everyone

i have a 2002 mini cooper s
now i want to put proformance chip, air filter and 15% pullie

they say thats going to give me a 20 kw gain

the thing is i herd that a pullie can snap or fall off and the engine will fry in 20 secs

wat are the chances, wat can i do or say the people who will do it.

i want to add these to my car but i dont want any problems with engine after.

please write back thanks

[sef]

I have the 15% pulley and belt..,. What I also have is a protector that stops damage if the belt snaps... Lohen here in the UK sell them for around £20.00... Well worth it to give you piece of mind....

[DaFlake]

Running 15% pulley (Mini -Madness) with CAI (Mini_Madness) and MTH tuning for over a year with no problems. I highly recommend it.

[minigolf]

Likewise, I've been running Alta V1 15% pulley with MTH Tuner file for just over 12 months, including a couple of track days, no apparent problems at this stage. Just plenty of smiles.

[Babes]

have just swapped jcw pulley for 17% AltaV2, modified JCW airbox and MTH. I'm getting rid of the MTH tomorrow and replacing it with a custom unichip map. Be interesting to see what the difference before and after with a custom map is.

[DaFlake]

Keep us posted on your thoughts of it. Have you thought about running a before and after dyno to get some idea of the difference?

[BlueMax]

Sorry this is going slightly off-topic. Babes, you were going to report on the differences between the GTT crank pulley and JCW S charger pulley vs the 17% Alta. Anything yet to report (especially before changing over to another map as that will not be a direct comparison)?

[Babes]

Sorry Blue yes I was going to report on that. My personal thoughts are the 17% pulley and standard crank pulley is a better combination for my style of driving than the JCW pulley and 3% crank pulley. I like to wind the engine out using the whole rev range and always felt limited with the 3% CP though it did rev quicker. I think it depends entirely on your driving style to be honest.

So for me the 17% pulley is much better than JCW + CP combo. Also the whine from the SC is more pronounced which i love the sound of.

I will be doing a before and after dyno. I had a dyno done at the same place as a stock 200 JCW several years ago which from memory produced 134WHP. I have been running the MTH map for just over a year and no doubt DaFlake recalls the nonsense that went on over on NAM when I was refused my free upgrade, hence the move to another chip. (I would rather spend $1300 on a custom unichip than the $100 odd they wanted for updated MTH file that should have been free, yes im still peeved about it! )

So tomorrow I shall have comparison from MTH to custom unichip map with the following mods to the engine: (the upgrade i was refused from MTH was for the change from the JCW + 3% combo to 17% + stock. Was told it would make no difference.)

17% Alta V2
Alta air intake tube
Alta radiator hose kit
GTT intercooler
GTT snoot boots
GTT air filter
Modified JCW airbox (4500rpm flap removed)
GTT idler puller
GTT oil catch can
Screamin demon ignition
Nology hotwires
X force manifold
Modified JCW exhaust (resonator removed)

Will let you know what the results are

[DaFlake]

Hence the reason that I am interested in it.

[BlueMax]

Thanks for the update. I thought the JCW +3% would give close to the same 'gearing' on the SC as a 17% SC pulley and stock CP. I do not understand why you felt limited by the +3% CP - the net effect of spin speed of the supercharger at any given engine rpm should be pretty much the same between the two combos and you are not changing the rev limit - except if you change the map but then it is not a direct comparison anymore. The +3% gives quicker revving as a result of the lower mass of the CP. Please share your views on this, makes for interesting reading. I am getting my GTT +3% CP installed on my 210 JCW this weekend. Has whatever caused your vibration at idle been resolved?

[Babes]

yes it has, not completely gone as I have the TSW engine damper which does cause some vibration. I am fairly sure it was just a fitment issue though as many others run the lightweight CP with no problems. I do know mine is much smoother with stock CP back on.

Reason i felt limited is that it sounded to be revving much higher than it actually was. I would change at 6000rpm as it sounded like the engine would explode, where as now i can rev right to the limit and it sounds strong and sweet all the way. Again there will be folks who say changing at the limit is not good for the engine anyway but i disagree, thats what the rev limiter is for, so you dont break anything.

Again, it is just my driving style and i prefer the 17% + stock combo after trying both. I do know it produces more boost as now the needle goes right past the 17psi mark on my boost gauge and traction control kicks in changing into 3rd if im WOT.

Im sure you will have many miles with smiles with your 3% CP.

[BlueMax]

Thanks Babes, I will hopefully be able to report on my 3% CP next week. I fitted the GTT air filter about 2 weeks ago and quite happy with it. Enjoy your new performance combo!