Quote:
Originally Posted by GTRFAN
I'd be really interested to see the run when you fit the exhaust. The A/F ratios are not optimal at all. Is a tuned ROM on your list?
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Hey there GTR', firstly some great pics in your journal thread mate. Hopefully on our next cruise we can get some along those lines.
Now as for the AFR we were all a bit surprised. More so the Mech's and Tuner that is (I love my cars but only have very basic understanding of some things). The two main conclusions they came to and I would agree are:
1-Nissan have decided to run our cars much richer than the US/Japan Spec cars due to our generally lower grade fuel. This seems to be the case with most JP cars as we seem to have a lower rated HP rating on a lot of cars. I personally have always run BP Ultimate and have had my best results from that fuel.
2-Their O2 sensor might have been off as well (think thats what gets the AFR). As this was just a PWR run there was no REAL calibration done. It was just for a before and after comparison.
As for a tune I'm definitely in for an ECU of some sort. Haltech are meant to be in the process of doing a dedicated one for the 370Z like they did with the 350Z. If we are generally running that rich there is some great room for improvement.
On that note, when your tail pipe is getting blackish, that is generally from a car running rich yes?