AFAccord
Well-Known Member
With a cool air intake setup, our accords (4cyl) feel like they peak around 4300rpm, then drop off at higher rpms, whereas a short ram intake feels like it provides a smoother powerband, with more top-end.
I know it's been discussed on here by others and myself, so here's the response.
The first two runs are with the cool air installed. As you can see, not much difference from heat soak between runs. I then disconnected the extension to the intake, making it a short ram. The results can be seen in the third run, in green. Clearly no loss up top for the cool air, and simply a small range where a loss can be seen from the short ram setup.
FYI, Setup:
Stock F23A1 engine from valve cover to oil pan with roughly 8,000 miles.
Stock Clutch/flywheel with 8,000 miles.
H23 Prelude transmission with 59,000 miles.
I know it's been discussed on here by others and myself, so here's the response.

The first two runs are with the cool air installed. As you can see, not much difference from heat soak between runs. I then disconnected the extension to the intake, making it a short ram. The results can be seen in the third run, in green. Clearly no loss up top for the cool air, and simply a small range where a loss can be seen from the short ram setup.
FYI, Setup:
Stock F23A1 engine from valve cover to oil pan with roughly 8,000 miles.
Stock Clutch/flywheel with 8,000 miles.
H23 Prelude transmission with 59,000 miles.
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