Hi guys im currently looking into running water meth at the moment on the s3, im running apr stage2+ i know it wont make much difference unless its mapped in but this also has its problems etc, apr do a 104octane map would this be better when running water meth? iv been reading about people saying water meth damages the throttle body? can anyone confirm this
thanks in advance adam
Hi Adam,
On a stock turbo,you will get a bit more power,but only if you specifically map for it,and you then need to ensure you don't run out of water/meth,as to take advantage of it,the timing will be significantly advanced.
There is a potential risk of methanol attacking the throttle butterfly,and causing failure,as it's made of ABS,and USRT in the States can sell a spacer to allow injection above the throttle body.
You would need a 1 bar check valve in the system to ensure that water/meth isn't pulled into the manifold under vacuum,during throttle closure.
Having said that,mine had it's throttle body replaced recently for an unrelated problem,and after 30 000 miles using an AEM system,there were no problems.
So in short,yes,you will see some benefits,but only if you map for it,and in any case,the poor old K04 is pretty much done by 380bhp on the airflow front.
You get much bigger gains from WMI on a big turbo system.