Datalogging questions

[sicmadek]

How many of you had to send datalogs to sean to get the tune right? I also want to know if anyone has data logged before and after installing a catch can.

 

[SIhemi]

I'm running a hemifever tune. I did all the data logging and emailed it to Sean. A catch can isn't a performance mod. I don't think it will show up on the tune.

 

[rustydagger]

Theretically a catch can improves the quality of air/fuel input into your engine, which can allow for more spark advance, in practice, I dont think it makes muc. difference

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[Jerseymike]

I had some knock retard so I got a catch can and data logged again after the install. There was no difference. Turns out it was crappy winter gas. Once the summer gas came back I was able to put the timing back in that I pulled during the winter. So no change from the catch can but I am happy with all the oil staying out of the top of my motor.