Single box or twin box exhaust system??
Discussion
Hi all
Quick question......single or twin.....have ordered am RC40 rear box with large bore tail pipe and cant decide whether to keep as a twin box system or get rid of the middle box.
I would like a throatier exhaust tone but don't want anything too loud...my boy racer days are over and already have an elise which wakes the neighbours!
Would the new rear box along with a middle silencer be sufficiently different than than standard system it currently has - or would I only really get an improved exhaust tone from removing the middle silencer?
Cheers
Quick question......single or twin.....have ordered am RC40 rear box with large bore tail pipe and cant decide whether to keep as a twin box system or get rid of the middle box.
I would like a throatier exhaust tone but don't want anything too loud...my boy racer days are over and already have an elise which wakes the neighbours!
Would the new rear box along with a middle silencer be sufficiently different than than standard system it currently has - or would I only really get an improved exhaust tone from removing the middle silencer?
Cheers
Twinbox RC40. That'll give you what you want - deep and purposeful without being overly noisy.
Cobbling an RC40 rear onto your current middle box - total waste of time.
A single box RC40 could give an aspirin, a bl**dy headche! There isn't any gain in running a single box RC40 system. I think you'll run the risk of getting your collar felt too.
Cobbling an RC40 rear onto your current middle box - total waste of time.
A single box RC40 could give an aspirin, a bl**dy headche! There isn't any gain in running a single box RC40 system. I think you'll run the risk of getting your collar felt too.
Edited by FWDRacer on Monday 4th July 11:26
I always run twin box Maniflow or RC40 as I don't like noisy cars.
What you want for a 1275 is a 1.75" internal dia. exhaust right to the end of the final exit pipe. What you don't want is a larger diameter final pipe as this causes the exhaust gas to slow down and the pressure to increase in the pipe, thus losing efficiency. Ideally the velocity of the gas molecules needs to be constant right to the exit point.
What you want for a 1275 is a 1.75" internal dia. exhaust right to the end of the final exit pipe. What you don't want is a larger diameter final pipe as this causes the exhaust gas to slow down and the pressure to increase in the pipe, thus losing efficiency. Ideally the velocity of the gas molecules needs to be constant right to the exit point.
Cooperman said:
I always run twin box Maniflow or RC40 as I don't like noisy cars.
What you want for a 1275 is a 1.75" internal dia. exhaust right to the end of the final exit pipe. What you don't want is a larger diameter final pipe as this causes the exhaust gas to slow down and the pressure to increase in the pipe, thus losing efficiency. Ideally the velocity of the gas molecules needs to be constant right to the exit point.
It's an exhausting subject - but clearly you understand it. What you want for a 1275 is a 1.75" internal dia. exhaust right to the end of the final exit pipe. What you don't want is a larger diameter final pipe as this causes the exhaust gas to slow down and the pressure to increase in the pipe, thus losing efficiency. Ideally the velocity of the gas molecules needs to be constant right to the exit point.
It's covered by a thing called 'Bernoulli's Theorem'. This states that when a fluid passes along a pipe, if the cross-sectional area of the pipe increases, the fluid velocity decreases and the pressure increases. If the area of the pipe decreases the velocity increases and the pressure decreases (that's how a spray gun works).
As the molecules of exhaust gas rush along the exhaust pipe they gain an inertia and it's this inertia which makes them exit the end of the pipe efficiently. So if you fit a larger diameter rear final pipe, or even (God forbid) twin large pipes, you screw up the gas velocity/molecular inertia causing increased pressure in the end of the pipe and loss of power.
Sorry if it's a bit theoretical, but that's briefly the physics of it.
As the molecules of exhaust gas rush along the exhaust pipe they gain an inertia and it's this inertia which makes them exit the end of the pipe efficiently. So if you fit a larger diameter rear final pipe, or even (God forbid) twin large pipes, you screw up the gas velocity/molecular inertia causing increased pressure in the end of the pipe and loss of power.
Sorry if it's a bit theoretical, but that's briefly the physics of it.
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