[bards]

Arghhhh im confused now, I keep hearing different things from different people, I have been told that non standard plugs sometimes dont fit as well as the standard ones, which can cause problems. Im looking at putting a 15% pulley on, but dont want to wreck my engine (obviously) and am being told by some to keep the standard plugs and others to change to a colder plug.

DOH!

 

[bards]

Ok, so if you go for a 15% pulley, with no remap, alta intake and cat back exhaust, colder plugs are not needed?

ps i have an 05 car and have been told a remap is not necessary

Thanks

Nick

 

[bards]

Thanks for that info, i take your points on board, they seem to make good sense.

Really what im after, is just a bit more flexibility throughout the rev range, im not looking to make the car much quicker, if i was going to do that id probably sell up and go buy a scooby!

The car is mainly used for normal/fast road driving and the occasional track outing, but thats all. Im wanting to get a little more power without compromising the reliability also.

Thanks

Nick

Nick,

What you are asking is going to really vary engine to engine and should be handled that way. From what I have found with 05 and 06's is that the plugs are really not needed unless get the engine hotter than a 15% pulley with street driving is going to make. That is my stance on this matter and you could save that money to go elsewhere.

As for the ECU, it varies. There are many folks on this site that will do a performance setup without doing anything to the ECU. In my opinion, this stock ECU is pretty flexible and can handle the additional load but every car is different. Of the 10 or so cars that I have done pulley upgrades on, 6 of them were running rich (could smell fuel at the exhaust). Mine was one of these, so I decided to run MTH and it immediately made a difference and got rid of my rich running car. I would say that it is generally best to let the car know what you have done to it. Even the JCW has a remap but there are many here running 15% with stock ECU.

The bottom line is that when you mod a car, you have to work on the overall balance of the vehicle and not just focus on strapping on parts for the sake of doing that. You also need to focus on what kind of modding you are going to do whether it is street, drag, or track. Once you make up your mind on that you can then devise a path to go down. Asking here will get you 20000 different answers with no two alike. So I guess the bottom line is "what are YOU looking for".