I wonder about people doing a ECU upgrade more than once though, also, in reality, a 35 dollar EBAY special CAI if you make a cheap heat shield....will do the same as a 300 dollar one. Thing is that the CAI works at speed. The sucking sound from the air box deletion is not the sound of major HP gains. The heat shield is pretty easy to make with sheet metal and a dremmel. Some CAI look better than others, some are carbon fiber some are not. The best ones are long tubes ducted near the lower air dam. Actually, some PVC pipe, a bracket, a universal K&N.....you have a low dollar CAI. Add some sheet metal, and some weather stripping, you have a hear shield if you choose the route of not ducting it lower. Still.....it is alot of money for a tube, a air filter, and a few clamps that may make it sound nice, but not any noticable gain. Again, just my opinion.
Hey, I went that route before......the engine looked pretty nice....but was alot cheaper for a lid on my Z28 than the E36. All aftermarket parts so far for the BMW are pretty insane with prices and HP gains are minimal with no one posting anything but seller dyno posts.
I know the pain with trial and error, but with my last engine throwing out over 300HP....I learned a few things about what worked and what was BS...or I would throw a Vornado...a leaf blower supercharger on the BMW.....LOL.
This was the only car people asked me what was under the hood.
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