Yep. Read this thread.

https://www.rx8club.com/series-i-major-horsepower-upgrades-93/bridgeport-rx8-173190/

Bringing this nice topic back from the past!!

Anyone ported the 4 port engine? I am curious to see how much there is left in the endplates before water is reached on the intake side. From casting it looks like same cast as 6 port engine but without the hole for the apv sleeve machined. so the question is: is there water above the port ot or not? ideally I would like to close the port at around 65° abdc and adding a small peripheral intake port to the cocktail.

:rollingla