I want to bored my thorttle body, about 1 mm of diameter, my engine is an ECOtec 1.6L, do you see a problem to do this?...
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I want to bored my thorttle body, about 1 mm of diameter, my engine is an ECOtec 1.6L, do you see a problem to do this?...
Someone posted a how-to on this site, I forget who. there is no problem porting/ overboring the throttle body, but dont look for huge, even noticeable gains. it will help flow but nothing enormous. but with the right tools, if you do it its a free upgrade. I also do not know what is safe, from what ive seen the aluminum tube before the butterfly is fairly thin already.
from my observation, there are other restrictions that should be opened up before the "metering" control being opened up will create much benefit.
I do it in a nissan sentra (méxican tsuru) 2001 with engine GA16DNE, y bored 2mm of diámeter....
in that car i was polish & ported engine, and cut the valves in three angles, have CAI, with AEM dry filter, header hot shot, and magnaflow high flow cat, custom cat back at 2" inches...
there are some pics from that thorttle body...
Before...
http://i4.photobucket.com/albums/y13...04compacta.jpg
after...
http://i4.photobucket.com/albums/y13...02compacta.jpg
http://i4.photobucket.com/albums/y13...01compacta.jpg
In my G3 y have a custom cat back at 2", whith magnaflow direct mufflers, and agnaflow spoon high flow cat...
the cat...
http://i4.photobucket.com/albums/y13...3/100_1319.jpg
1st muffler...
http://i4.photobucket.com/albums/y13...3/100_1318.jpg
the muffler...
http://i4.photobucket.com/albums/y13...3/100_1323.jpg
the mandrel bent curves...
http://i4.photobucket.com/albums/y13...3/100_1323.jpg