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After reading Cakley's muffler modification and the modified version,
I did one mod a while back by cutting a door and drilling some holes
as explained in this old thread:
http://www.insightcentral.net/forum/viewtopic.php?t=1657&highlight=
I drove with this mod for awhile but I began wondering if I could have
directed the air flow better. After studying images of the whole exposed
muffler, I thought that I could squeeze a bypass pipe in the last chamber
to direct the airflow right out the exhaust (with no back pressure) so I
decided to do it. I bought a new exhaust (since the old one had holes
drilled into it I thought I would use it as a backup). Here is the link
explaining the internal bypass pipe OEM muffler modification.
Here are a few pictures if you want a quick reference:
The internal area of modification
The internal pipes cut and ready for the bypass pipe
The bypass pipe installed and sealed with JB Weld
The muffler painted black and ready for installation
I can not detect any increased noise level but I can feel the engine
pulses. It is too early for me to comment on performance or mileage
but it has to be better than the standard restrictive muffler.
JoeCVT - Just your average CVT owner
I did one mod a while back by cutting a door and drilling some holes
as explained in this old thread:
http://www.insightcentral.net/forum/viewtopic.php?t=1657&highlight=
I drove with this mod for awhile but I began wondering if I could have
directed the air flow better. After studying images of the whole exposed
muffler, I thought that I could squeeze a bypass pipe in the last chamber
to direct the airflow right out the exhaust (with no back pressure) so I
decided to do it. I bought a new exhaust (since the old one had holes
drilled into it I thought I would use it as a backup). Here is the link
explaining the internal bypass pipe OEM muffler modification.
Here are a few pictures if you want a quick reference:
The internal area of modification
The internal pipes cut and ready for the bypass pipe
The bypass pipe installed and sealed with JB Weld
The muffler painted black and ready for installation
I can not detect any increased noise level but I can feel the engine
pulses. It is too early for me to comment on performance or mileage
but it has to be better than the standard restrictive muffler.
JoeCVT - Just your average CVT owner