I don't know anything about RTlink but you're on the right track with manual tuning. Keep in mind that with the O2 sensor that far from the engine its response time will vary with the larger-than normal temperature variations that occur due to exhaust heating vs exterior air cooling. Also keep in mind that in any given zone the O2 readings (combustion efficiency) vary with the surface temperatures in the combustion chamber ... they'll be hotter after an acceleration blast then they will be after just cruising for for even a few seconds. So limit your data collection observations to times that are preceded by similar short-term histories, e.g. long, slow light-acceleration runs preceded by 30 sec of benign crusing. And for the max boost zones, find a long steep hill to climb so that the rate of change of rpm is slow. ----- Original Message ----- From: Mymiataflys To: [email protected] Sent: Sunday, November 21, 2010 7:06 AM Subject: Link tuning
I'm trying to to tune my old sleeve bearing turbo , it's on a 94 motor that's in my 91 chasis. I've had the car and link for a number of years with only moderate success getting it tuned. It currently has a lc1 wide band mounted just in front of the cat, exhaust gas temp probe on the manifold, and an electric fuel pressure gauge. I've tried installing and running RTlink and I can't seem to get a handle on it. When I try to tune with the link in its 2 auto tune modes I end up with fairly crazy numbers, mostly way too rich. Recently I've decided to try tuning it in what I call a manual way. What I would like to be able to do is turn off all lamba corrections and drive the car in the center of each zone across the rpm band while data logging. look at the wideband plot and make my own corrections. I'm not sure if I am turning all lamba off. I have the lamba screen on the keypad so that it does not display the L3 icon and it says lamba off. I also have gone to zone Z800 and increased it from 0 to 4. On my datalogs it does not indicate any L3 corections but it does display L4 values of 4 or 5. Question. Can I tune the car this way? If yes, am I doing it correctly? Also sometimes I swear I can be out driving and I will see L3 corrections of 9 then 10 minutes later 1 for the same zone same exact conditions. I can also see on the keypad intake air temps while cruising of say 18 with a correction of +1 and then I will see a corection of 0 or +2 and check the intake temp and it has not changed. Thanks Michael ------------------------------------------------------------------------------ _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
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