Curious if this causes any power loss and if so about how much.
Ovalized exhaust under transmission - power loss or not?
- Thread starter Chronicle
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I would doubt much
Compared to a cat or muffler or even just steeper bends.....probably negligible in any way.
The tubing is ovalized in that area. If you were to calculate the cross-sectional area, it's probably similar to or even the same as the round tubing on either side, meaning it would cause very little (if any) power loss.
However the OEM GX exhaust manifolds are very restrictive, as is the OEM muffler and catback. I could not believe how much more power mine had after adding long tube headers, and then again after replacing the catback with an aftermarket. If you have a GX460, headers aren't an option and you are stuck with only a catback, which is unlikely to benefit much without headers reducing the upstream restrictions.
However the OEM GX exhaust manifolds are very restrictive, as is the OEM muffler and catback. I could not believe how much more power mine had after adding long tube headers, and then again after replacing the catback with an aftermarket. If you have a GX460, headers aren't an option and you are stuck with only a catback, which is unlikely to benefit much without headers reducing the upstream restrictions.
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Any downsides you've experienced with having long tube headers?
They are expensive, you won't pass emissions in many states (not a problem here in MO but it may be where you live), they are difficult to install, and the collector bolts seem to loosen up every few years and cause the exhaust gaskets to leak (however those gaskets are cheap and easy to replace).
So long as the surface area of the oval remains close, there would be so little loss in performance, you'd never it.
There are some better breathing systems out there, but if you are looking for a more thorough exhaust system, I'd also suggest doing something to increase intake.
You can only exhaust as much exhaust as you take in.
So many people don't understand this when they either put on a huge free breathing intake without addressing the exhaust, or big 'ol exhaust with the restrictive stock intake.
But then there's others that just like the rumble of a larger exhaust.
Not me... I've built my rig to quietly see things in the wild, not to scare them away as I rumble through the woods.
There are some better breathing systems out there, but if you are looking for a more thorough exhaust system, I'd also suggest doing something to increase intake.
You can only exhaust as much exhaust as you take in.
So many people don't understand this when they either put on a huge free breathing intake without addressing the exhaust, or big 'ol exhaust with the restrictive stock intake.
But then there's others that just like the rumble of a larger exhaust.
Not me... I've built my rig to quietly see things in the wild, not to scare them away as I rumble through the woods.
