Originally Posted by 5-7HEAVEN
Because your exhaust is now more efficient, your air/fuel mixture is lean and needs to be adjusted.
my mixture is fine, I have rejetted all my engines multiple times getting the mixture correct for every cahnge I've made.
I'm not asking anyone there opinions on my engines or how they run I simply ask if anyone else has experienced the same results as I have as far as the expansion chamber NOT making any noticable power increase over just having a good free flowing exhaust on these china girls.
I'm very good at tuning these engines so I'm not looking for any advice in that area.
thanks for the words though