I need to alter the position of the exhaust can, but I do not want to spend shed loads of money at the moment - and I can't find anyone local
that can build collectors!
The current setup is 4-2-1, but as I have a spare 4-1 collector and a local exhaust place have said they can easily bend and weld a single pipe
between the collector and the can, that appears to be my best bet.
Therefore, if I decide to go down that route, would I notice any difference in performance going from 4-2-1 to 4-1? I've looked at lots of BECs
and there seems to be plenty of them using both set ups! Confusing!!
Any advice would be gratefully received 
Nick 
I used the standard bike header, ZX9R, this is 4-1 also. No problem with ground clearance
ZX9R-E manifold
quote:
Originally posted by 40inches
I used the standard bike header, ZX9R, this is 4-1 also. No problem with ground clearance
ZX9R-E manifold
Osprey exhausts made my collector. Top service - they also sell all the components you may need at reasonable cost.
http://www.ospreyexhaustcomponents.co.uk
quote:
Originally posted by T66
Osprey exhausts made my collector. Top service - they also sell all the components you may need at reasonable cost.
http://www.ospreyexhaustcomponents.co.uk
They will modify anything to your spec, give them a call.
[Edited on 24/1/14 by T66]
quote:
Originally posted by 40inches
I used the standard bike header, ZX9R, this is 4-1 also. No problem with ground clearance
ZX9R-E manifold
quote:
Originally posted by T66
They will modify anything to your spec, give them a call.
Do not expect any real performance gains, sorry.
The optimum header length needs to be around 24" + another 12" to the can from memory, whatever you do there will not be sufficient space to
achieve this while leaving the can on the side.
4:1 is tuned to max torque at certain rev range, 4:2:1 gives a wider spread of torque but a little less at peak, unless your exhaust is horribly
restrictive I doubt if you note any difference, it may even become slower the sweet spot closes up.
To toggle the peak point you shorten primaries to raise the rpm, so advantage then will be high in the rev range which is not where you normally drive
the car.
quote:
Originally posted by mark chandler
Do not expect any real performance gains, sorry.
The optimum header length needs to be around 24" + another 12" to the can from memory, whatever you do there will not be sufficient space to achieve this while leaving the can on the side.
4:1 is tuned to max torque at certain rev range, 4:2:1 gives a wider spread of torque but a little less at peak, unless your exhaust is horribly restrictive I doubt if you note any difference, it may even become slower the sweet spot closes up.
To toggle the peak point you shorten primaries to raise the rpm, so advantage then will be high in the rev range which is not where you normally drive the car.
quote:
Originally posted by loggyboy
quote:
Originally posted by 40inches
I used the standard bike header, ZX9R, this is 4-1 also. No problem with ground clearance
ZX9R-E manifold
Just out of interest, are those horizontal pipes linking the headers, or are they just bracing/support?