69ttop502

Is there more horsepower to be had running an L88 hood and induction than running the hood with just the stock air cleaner

gerry72

In almost every way you can think of...yes. If you use the full L-88 hood to include the air box, your intake will only get air from outside the engine bay which is much cooler. Also, considering that the hood is cowl-inducted, you will achieve a very slight positive pressure from the high-pressure air at the cowl. Realistically though, your power will come from the outside air and a free-flowing air cleaner system.

Easy Mike

That's exactly why GM add them for the L88 option. :)

clem zahrobsky

you increase your HP 1% for every 10 degrees you lower the air inlet temp to your carb. :chevy

Jvette73

My original cowl induction on my 73 also had snorkles that would draw air from under the hood as well as from the cowl. I used sheet metal to block the snorkles and force all the air to be drawn from the cowl. My last outing at the track I tested just this. 2 out of 7 runs I removed the air cleaner completely and drew underhood air. The car ran between 2 and 3 tenths better with the air cleaner on and cowl induction functional. Might be just a fluke, but the car does not run better without cowl induction. In some applications, colder denser air will allow bigger jets for a bit more power.

Les

Ditto what Gerry said....FYI, the K&N replacement filter for the stock one will fit in the airbox w/ some one-sided adhesive weatherstripping trimmed to size to obtain proper sealing.

Jughead

Your 502 should be about the same height to matchup pretty closely yo the air chamber too.