Originally Posted by turbotrev

Very good explanation there Stu, nice one, very interesting stuff.
So because if it's in a road application that's where the efr turbos are really good I get it.

So with them spooling up quick and moving air faster are they also losing the ability to do this at the top end of the scale hence their power is made earlier on low down?
Do they run out of steam quicker and it's just the power band on the efr turbos is lower than the T series/gt series turbos?

Just for the record I have a 2wd saff on a gt30.
I'm not looking to change it (not yet anyway) was just intrigued about finding out more on these efr turbos.
I just find it weird you don't see many being used on tracks/drag strips etc, or are they......

Cheers Paul