Quote:
Originally Posted by Elmer
Just as a point of reference, I'm looking to revise the air intake for my 03 Boxster S. The Evo product looks pretty nice and would be easier to install. The 987 airbox makes sense, but is a bear to install. The price for either is about the same. For the 987 pieces, Ebay has them all, but it looks to be about $400 total, the airbox, tubes, throttle body and plenum. In my mind, the only reason to do either the Evo or 987 is to get the 74mm TB and greater airflow.
As to whether one or the other is a "true" cold air intake, the Evo looks to be sealed around its perimeter, and the 987 box is self contained. Both draw from the same source. Is one significantly warmer than the other? Dyno charts for both are about the same. Fabspeed published dyno runs for incrementally modified 986s. Eventually they ended up at the Evo airbox, full exhaust system and their ECU tune. I believe the final increase was 27-30 hp above base.
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If you think that EVO air box is sealed, you're sadly mistaken. You are correct, if you're going to do the air box, you should do the full intake system, including the larger throttle body and intake pipping. I would say on a 986 3.2 engine, just doing that you're looking at around 18 HP gain. I don't have a tune on my car, but with my mods, I'm getting around a 30 HP increase.
Quote:
Originally Posted by The Radium King
the water issue is a red herring. one guy on planet 9 installed one and drove it in a torrential rain and saturated the filter. became a big deal, impacted sales, so now vendors are trying to mitigate it. with my 987 air box, and the trimming i have done to the filter hanger, etc., there is a clear shot from my filter to the great outdoors (rain and all) and never had an issue.
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Your 987 air filter is much larger and would not be saturated by water as easily as the smaller air filter on that $400 kit, plus the 987 air box has the filter inside the air box and not sitting right in the smaller vent area of a 986 like the $400 kit. I waited 2 years to clean my K&N air filter and when I pulled it out, there was plenty off clean area on the filter as to not starve the engine for air. After cleaning it, I didn't even notice a difference. There are trade offs going either way, if you never drive in the rain, then that $400 kit would be a decent upgrade, but if you want the best all around air box for the 986, put in the 987 air box. Yes it's more labor intensive, but worth it IMO. I'm still scratching my head why anyone would put the $400 kit on a 987.