38mm factory high butterflies?

[blue72s]

A question about the factory high butterflies on the 2.4 ST (87.5mm bore x 66mm stroke with MFI, engine type 911/21).

I understand that the head port size of that engine were 38mm, so could someone tell me if it would have 38mm high butterflies?

It seems to me that most factory high butterflies were 41mm (for 2.5 ST) and 43mm (for 2.8 RSR and 3.0 RSR).


Thanks in advance.

[BURN-BROS]

It would seem plausible. However, the specs of a 38mm port may not be correct. They may have used a 41mm port....But you never know. If Porsche needed it they made it.