Okay, I've searched for ported throttle bodies, but not much popped up. Porting isn't quite the right word, but smoothing might be a bit better.

Has anybody smoothed out their throttle body? I haven't looked in there in great detail, but I'm pretty sure there are bumps, and a lip to smooth out. I've done it on a couple other cars (1993 Escort RS2000, and 2000 Escort ZX2) that worked out pretty well.

Don't worry, I wouldn't be expecting much from it. Maybe some MPG, or a bit of throttle response. Couldn't hurt too much I suppose?

Thoughts?

 

I've seen a thread about it.
I'll have a look...

edit: something like this? https://www.rx8club.com/series-i-major-horsepower-upgrades-93/ported-throttle-body-165288/

 

Saw that one, but the first few pages didn't seem all that relevant, since I'd be doing it myself with a Dremel.