07-01-2015, 05:41 PM
Just Thinking out loud on this one:
Seeking low end Torque and not High RPM Horses, what Diameter pipe to use?
Info:
The ID of my downpipe is 46-48mm ish., Small Hybrid KKK04 Turbo.
The system will be De-Cat, De-Boxed , straight pipe to rear exit. (Most likely)
The stock pipe is 55mm OD, to the Cat, than drops down after the Backbox to 50mm OD
A 2.0" (51mm) pipe is a exact match for the ID of the downpipe, and therefore would not interrupt flow velocity (Torque).
A 2.25" (57mm) pipe seems the a good balanced size (matching stock, but all the way through to exit of course).
A 2.5" (63mm) Best for power, and probably a nice throaty sound. But ID is about 10-12mm greater than Downpipe exit...No issues?
A 3" (76mm) OverKill for my setup really.
Also worried about Droning sound, If that happens I'll drop in a Flowmaster DBx muffler.
Now that I've written it out, I'll probably just cut before of the Cat, and take it from there with a 57mm to the rear exit. 
Your Thoughts?
Seeking low end Torque and not High RPM Horses, what Diameter pipe to use?
Info:
The ID of my downpipe is 46-48mm ish., Small Hybrid KKK04 Turbo.
The system will be De-Cat, De-Boxed , straight pipe to rear exit. (Most likely)
The stock pipe is 55mm OD, to the Cat, than drops down after the Backbox to 50mm OD
A 2.0" (51mm) pipe is a exact match for the ID of the downpipe, and therefore would not interrupt flow velocity (Torque).
A 2.25" (57mm) pipe seems the a good balanced size (matching stock, but all the way through to exit of course).
A 2.5" (63mm) Best for power, and probably a nice throaty sound. But ID is about 10-12mm greater than Downpipe exit...No issues?
A 3" (76mm) OverKill for my setup really.
Also worried about Droning sound, If that happens I'll drop in a Flowmaster DBx muffler.
Now that I've written it out, I'll probably just cut before of the Cat, and take it from there with a 57mm to the rear exit. Your Thoughts?
Suzuki Santana Vitara 1.9 Td (Xud9) 3Dr