Join Date: Oct 2015
Derestricting the throttle body
Has anyone tried this on thier alfa?
DIY Modifying the stock Throttle body for more air flow
I think the guy in the link took off a little too much from the shaft, i'd much rather leave it a bit thicker, especially where the threads for the butterfly screws are! The honda shaft was fairly thin from factory, i think it would be benficial to get the alfa shaft at least as thin as honda oem.
I really like the nice venturi shape he made on the throttle opening, if he was a little less agressive with the file and spent some more time sanding it might have looked perfect.
There is also a step in this picture of a v6 throttle body! It would be a little tricky but smoothing that out would help airflow
There is also mention of the need to calibrate the tps on the honda, i think the alfa 159's are all fly by wire, does it ever need to be calibrated?
Last edited by alfafanboy; 09-11-15 at 19:15.