Quote:
Originally Posted by barkinfool
Ike (& any others!)--
I have a question for you since you've done quite a bit of research on the ECU. I have an '02 986S which unfortunately experienced the dreaded IMS bearing failure in 2020 (even more unfortunately because I had invested in a proactive LN Engineering replacement bearing which failed in <20K miles!). Anyways, my Porsche mechanic suggested I consider putting in a brand new 3.6L short block while we were at it and he rebuilt the header, top exhaust valves, etc.... Cost was pretty close to getting 3.2L short block, but performance to me seems much better & worth the $1.5K difference. Anyways, we made no changes to the airbox though am running K&N & better exhaust for years. Just wondering if you know /think if a 3.6L tune makes sense (again I'm now running 3.6L base engine with original (rebuilt) Boxster 3.2L header on original tune using the 20% variance). If yes, suggestions who / where I should get the tune?
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If you adjusted valve specs, a custom tune would likely be best. Good luck finding someone in the states who can actually do that though (I'm taking about in person Dyno tuning, not the aftermarket crap that adds 15hp or whatever).
If your dme setup is running without throwing codes, I would do 2 things. First, look at ltft's. Use the VE of the 3.2L and see if the LTFTs are positive enough to account for the additional displacent. Second, have it Dyno tested and again see if the figures are in line with the VE for the increased displacent.
I would say one thing though - if youre running the stock 986s tune in this motor, that means you have the oem MAF housing in place, and presumably the rest of the intake is stock as well. On a 3.6l block, I'm sure you're losing power there. Upgrade your intake and do a 996 tune.
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