Quote:
Originally Posted by LokiRx7
....Its a daily driver, not a race car. I dont particularly care about performance, although I get high 30's and occasionally low 40's whenever I average fuel economy.
If it somehow is affecting performance, which I doubt it is, I would say it is possibly restricting 1/3 to 2 horsepower.... So I dont care enough to change it out. When I do auto-x it it does fine, I can post times as fast or faster than our local STi.
Sorry if I sound like an ass, just the average CFM an air filter pulls just seems so trivial to me. But then again I am not looking for every last hp I can find.
EDIT ::
We did do a test on Rx7Club years ago to find the average CFM a 12a could swallow. It wasnt much, considering I have stock injectors, stock intake manifold and the stock throttle body, I can promise you it is receiving all the air it needs. Adding an Air filter that far outflows the stock airbox doesnt add much power because the car will breath in only as much as it needs, and with the stock intake, afm, and injectors... It doesnt use much, if any more than the stock airbox would provide. Really? Do any of you honestly think Toyota would have put such a restrictive airbox on the car that a cone filter would magically free up a ton of power?
That said, I have a cone filter simply because my stock airbox was full of rust and the rubber intake pipes were dryrotted and cracked. The cone filter was a cheap and simple fix. And it frees up alot of room to work in.
|
funny, i don't look at trying to supercede CFM values; just to optimize. it doesn't matter if it's a daily driver or a racecar. one way or another putting an airfilter that could support a lawnmower on a car that is rev-happy and uses something like TVIS isn't a smart idea.
obviously your 12A isn't a fire-breathing monster like those i've witnessed. i have video of a 12A built by a SERIOUS rotary guy...12' flames fed by a HUGE holley double pumper...
furthermore Toyota engineered/built the 4AG-E when? yeah and as a manufacturer, a main concern would be EPA standards and what-not outside of reliability and good mechanical function.