Revising a Tune?

Tony Conti said:

I've heard people in the past talk about "cleaning up" a tune because they had the same tune on it for a long time. Is that really necessary if everything feels fine? I've had the same custom tune on for over two years now and haven't had any problems. Just curious about this.

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GlassTop09 said:

About the only thing that a "tune refreshing" would be is taking a good operating base tune file to "match up" w\ the learned tune file numbers

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DieHarder said:

If components/parameters (spark, plugs, fuel, engine wear) haven't changed the car shouldn't run any different. There's no need to "update" a tune unless you're trying to get something out of it (more power, richer/leaner, fix a stumble, different injectors, supercharger, etc.). If you're running fine and happy with it leave it alone. I've had the same tune on mine for 3 years, runs great. No plans to do anything until I build the engine. Then, I'll need an update.

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GlassTop09 said:

About the only thing that a "tune refreshing" would be is taking a good operating base tune file to "match up" w\ the learned tune file numbers over time so that the "new good base tune file" incorporates all the good learned tune file numbers up front so the PCM doesn't have to "relearn" those numbers again......

This is the general gist of a tune revision.....whether you do it in two weeks or two years is irrelevant.

No this is not necessary to do if all is operating\driving fine.....but IMHO it is something to consider having done especially if your tuning was done specifically on a dyno (main target is the low speed, closed\part throttle tune mapping area that can get somewhat ignored due to tuning session time constraints).
This is where remote tuning is generally better overall....this is what the datalogs are capturing....

My 2 cents..........

PS---1 thing I will say, here is where using a battery tender instead of disconnecting\reconnecting battery when extended parked time\storage time is concerned to maintain the PCM "learned" tune numbers is IMHO a better move over time....but to each their own.

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