As some of you already know, my main b!tch about the BA XR8's performance is the low down torque.
I did some readup on the net regarding the use of balance pipes for exhaust systems(also known as H pipe, merge pipe, kiss pipe, X pipe, crossover pipe). Theory shows that balance pipes give better low down torque by creating a scavanging effect on some engines, usually "high powered" ones. It is not so much noticable on "street engines".
The stock BA XR8 exhaust system has one of these balance pipes after the cats. Most call it a "Y piece". The herrod system, D&T system and HPX system all reuse this Y piece. I'm not sure whether it is for performance or convinience sake.
My current exhaust system is a dual setup that does not use this Y piece. I am wondering if anyone has done tests on the BA XR8s to see whether they make any difference?
I am soon to have the pacemakers put on and I'm wondering if it's worth getting the blokes to stick the Y piece back on after the cats or not. My reservation for putting it back on is that it sounds way better without Y piece, but it's now in the back of my mind that I may be compromising low down torque.
I'm no expert on reading dyno charts but below is a copy of my recent run. Is it possible to tell from this whether the Y piece is required?
http://members.optusnet.com.au/fullthrottle/MyXR8Dyno.JPG
If anyone has tested with and without the Y piece please let me know your findings. Any help would be gladly appreciated.
I did some readup on the net regarding the use of balance pipes for exhaust systems(also known as H pipe, merge pipe, kiss pipe, X pipe, crossover pipe). Theory shows that balance pipes give better low down torque by creating a scavanging effect on some engines, usually "high powered" ones. It is not so much noticable on "street engines".
The stock BA XR8 exhaust system has one of these balance pipes after the cats. Most call it a "Y piece". The herrod system, D&T system and HPX system all reuse this Y piece. I'm not sure whether it is for performance or convinience sake.
My current exhaust system is a dual setup that does not use this Y piece. I am wondering if anyone has done tests on the BA XR8s to see whether they make any difference?
I am soon to have the pacemakers put on and I'm wondering if it's worth getting the blokes to stick the Y piece back on after the cats or not. My reservation for putting it back on is that it sounds way better without Y piece, but it's now in the back of my mind that I may be compromising low down torque.
I'm no expert on reading dyno charts but below is a copy of my recent run. Is it possible to tell from this whether the Y piece is required?
http://members.optusnet.com.au/fullthrottle/MyXR8Dyno.JPG
If anyone has tested with and without the Y piece please let me know your findings. Any help would be gladly appreciated.