Update : intake manifold swap done !
Hallo !
Ein kleines Update !
Die H23 Ansaugbrücke sitzt am F20A4 Motor (5. Gen BB9).
ok, auf Englisch :wink:
The swap went very well. Took approx. 9 hours from start to finish, taking things easy.
The intake manifold (IM) is held by 9 bolts, of which 5 are underneath... these are very difficult to access. Here you'll lose some time. When the IM is finally removed, you'll have to get the gasket off. This took us approx. 2h30.
From there it's just bolting the H23 IM on, pretty straightforward. Idle is perfectly stable at 800rpm. I did have to change the TPS on my H23 butterfly (broken). I replaced it with the one of the F20 butterfly.
If you need to change the TPS, do not forget to calibrate it. Very important!
This swap was definitely worth it !! Better throttle response, and pulls much better after 4500 rpm !! (I'm full stock btw)
I still have to connect the secondary butterflies.
Finished installation :
Custom bracket to install the MAP sensor on the H23 butterfly :
TPS calibration :
Note the "loop" for the MAP sensor and other vacuum lines :
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