JCW manifold and full exhaust system fitted. Whats next?

[KMK163]

Hello guys. I have just fitted JCW manifold and JCW exhaust system on my 2003 MCS. Whats my next move for increase the performance but on logical levels? Shall i install a 17% pulley? Your opinions please?

[minti]

Quote: Originally Posted by KMK163

Hello guys. I have just fitted JCW manifold and JCW exhaust system on my 2003 MCS. Whats my next move for increase the performance but on logical levels? Shall i install a 17% pulley? Your opinions please?

Unless you have a modified cylinder head with larger valve (larger outlet, maybe larger inlet) I wouldn't go further than 15% due to reliability during high speed driving or track days.

If you're using your mini just to get the shopping bags home without going into high revs 17% might be O.K.

Just my opinion.

[TallAndy]

Go for larger intercooler, GRS or GTT and you could also do enlarged crankpully to make the JCW effectively like a 15% pully

[St00ge]

Quote: Originally Posted by minti

Unless you have a modified cylinder head with larger valve (larger outlet, maybe larger inlet) I wouldn't go further than 15% due to reliability during high speed driving or track days.

If you're using your mini just to get the shopping bags home without going into high revs 17% might be O.K.

Just my opinion.

17% might be ok? I have a bone stock head. I have a 17% and my car lives a lot of its life above 4000. Seems ok to me

And anyway, many people run 19% pullies on stock heads without any problems. Go with whichever pully you feel comfortable with

[KMK163]

The thing is that i dont know exactly the differences. I use the car as everyday car to go to work, i dont do track days neither drag races. Just i hit it a little bit hard in the motorway and this is just for 1-2 minutes. Nothing more. What pulley to use with this style? 15%? I aiming for about 200 - 210bhp

[Lohen]

Quote: Originally Posted by KMK163

The thing is that i dont know exactly the differences. I use the car as everyday car to go to work, i dont do track days neither drag races. Just i hit it a little bit hard in the motorway and this is just for 1-2 minutes. Nothing more. What pulley to use with this style? 15%? I aiming for about 200 - 210bhp

Whatever pulley you go for make sure that you have a good map (re-map) to go with it as it will protect the engine. Also as Cyprus is very hot (i'm kinda here ) then you will definatelly benefit from an uprated intercooler, especially if you are planning to have a pulley done at a later stage.

Andrey

[KMK163]

Thanks Lohen. I was thinking of an interooler and the water spray system for that reason as you said temperatures here are going crazy. Today as an example is 38 - 40 degrees. Thank god my DS bullet is garaged hehehe. . So you have being to Cyprus then?

[KMK163]

I have found a second hand intercooler that was on a cooper s automatic transmission though. Does it has any difference from installing it on a manual one?

[Lohen]

No there aren't any differences as they are all the same in that area, we are kind of out here at the moment.

Andrey

[KMK163]

One more question to Andrey. And to anyone aelse that have a clue, I have also started a topic, does JCW manifold has any differences with stock MCS manifold?