Ko3 & Ko4

[Jay20VT]

Hi chaps, I was out in my LCR last night, and I had to put both windows down to help demist windscreen etc etc. I noticed that the KO4 turbos in LCR's are alot quieter that the KO3 found in Leon Cupra's, why is that?

 

[cuprablue]

I would guess that it might be something to do with the diameter of the turbo. I believe the LC turbo is smaller than on the LCR. Probably similar to when you have a smaller fan on a computer. Because they have to run faster to get the same air flow than a larger fan they make a lot more noise. I suspect a smaller turbo will be flowing air quicker than a larger turbo ( that doesn't mean it's flowing more air however) and this may lead to a louder whistling sound.

I could be completely wrong though.

cuprablue

 

[gazjones]

when ive listend to the lcr's on rolling roads they always whistle loads i thought compaired to the ko3s ones these are mapped ones though not standard!

 

[karlosR]

you can really hear mine spooling up, but i've got the ramair filter with the cold air feed removed and a forge TIP on mine......... the forge 007p valve sounds spot on too!

 

[gazjones]

is the ko4 silernced as some ko3s' arnt so that might also be another reason why you can notice a difference

 

[karlosR]

there is a silencer on the pipework from the turbo to the first intercooler, unfortunately!