Quote:
Originally Posted by TwoPageAfro
The bigger the better right? Also, I have a filter on my short ram with a heat shield I'd like to keep so I'll measure it. (looks a lot like this : http://rpmspeed.com/images/E-1009.jpg
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bigger isnt always better. i know that with some larger sized intake piping on the celica's it can cause the ecu to throw a CEL and run poorly. will this happen on our corolla's? maybe. i know for a fact, with my setup right now i dont have a CEL from an intake. but im a 99 map sensor engine. the CEL occurs on maf cars. i have a short ram in 3in. works fine. it also is close to the opening diameter of the celica gt throttle body i am using.
then we can get into the velocity vs flow debate of size. a 2.5 in pipe would have a higher velocity than a 3in but lower flow total. but the 3in would have a higher flow rating, and slower velocity.
a 2.5in diameter is what i would stick with on maf sensor cars, if you have a map, you could go 3in, if you want to. but like i said, i will make them to what ever specs you want.