Software tuning for 986 w/996 engine

[arethusa71]

This is an old post, but lets see if I can revive it. I want to be sure this will work for me.. Here is my situation...

anyway- we just built a mutt engine. 3.2 block bored to 3.6, 996 intake manifold, 987 airbox with 3.5" silicone pipe between the 987 MAF housing to the throttle body. My throttle body is an 84mm.

Now, the engine starts and just runs for about 30 seconds and then dies. We can keep it running with a blip of the throttle, but it won't idle.

Is this similar to what others had in their Boxster with an upgraded engine?

I am going to try and get an ROW tune but wanted to compare my situation with yours as it sounds the same. Does it need to be a 996 ROW tune? and not a 986 ROW tune?

Thank you.