Hello everyone. I just finally got around to purchasing the jb4. I am also putting in new plugs. I'm curious whether there is really a need for a complete replacement of the air intake or if high flow filters would be close on performance? I I have seen a lot of posts comparing the intakes, but none really comparing new intakes versus better filters. Thanks for any thoughts.
High Flow filter vs. new intake
- Thread starter stevjaty
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oddball
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The filters are not the issue with the stock intake design. The complexity of the design - especially the parts in front of the core support - are the restriction. The actual inlet is a very small strip immediately under that large plastic panel attached to the bumper. The air then has to make several 90 degree turns through small plastic parts. It makes a very quiet intake, but is very restrictive.
That's why the big mouth intakes make such a difference - they replace the most restrictive parts. Other intakes with a cone just floating in the engine bay can pull air from anywhere, so the intake parts in front of the core support no longer matter.
The low-buck-high-return is big mouth + K&N panel filters.
That's why the big mouth intakes make such a difference - they replace the most restrictive parts. Other intakes with a cone just floating in the engine bay can pull air from anywhere, so the intake parts in front of the core support no longer matter.
The low-buck-high-return is big mouth + K&N panel filters.
oddball
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The big dyno test Burger posted is a good reinforcement of this. The intake swap showed small gains down low, but more gains as the engine reved higher. Clear indication of a flow restriction (air intake, fuel, or exhaust) being improved.
