Looking to fit my cooper freeflow and single box maniflow system (and inlet manifold obviously!) on a 998. I have done a lot of reading but there seems to be a 50:50 split on whether to go for an AAU or AAA as a starting point. It will take a trip to the rolling road but looking for something to get it in the ballpark before I go. What have people found works? Or do I get both and play?
Second question is, did they fiddle with needles on new carbs dependant on model or were they all just dumped in? The reason I ask is that I have a load of needles from MGBs and I think there may be an AAU or two in there. Obviously don't want to use it if there were different profiles across models.

Aau Or Aaa?
Started by
Tamworthbay
, May 31 2013 03:28 PM
2 replies to this topic
#1
Posted 31 May 2013 - 03:28 PM
#2
Posted 31 May 2013 - 04:19 PM
We found both worked, sisters runs AAU with a k&n filter in original airbox. No problems
Mine runs AAA with same setup, just had a flat spot with the AAU on mine.
#3
Posted 31 May 2013 - 07:07 PM
Only road testing under load will tell..get both and try them, set CO to 2.5-3.0 at idle and eventually try a thick oil in the carb for further enrichment under acceleration.
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