Originally Posted by
fraser9764
the thing i dont understand is why a cossie would ever have one fitted?
the amal valve does a perfectly good job, and if you want to increase your boost, with a bleed valve or not, it is going to need to be mapped again, so why not map it with the amal valve?
Many people don't understand fully what is involved, they think it's just a case of increasing the boost, then wonder why there engines melted.
Martin