Tuning to seasons?

[Roja618]

Will it be necessary for those in strong fluctuating climates who dd their cars to tune n have maps for different seasons? (NJ 100+ summer to mid teens in winter) I have heard that running tunes done in the summer will spike in the thicker winter air.

 

I am stock and still learning at the moment but am saving for a new blower, pref. hta68+fmic n supporting mods on 93

[LittleBlueGT]

There are many comp tables in the ECU to take care of various seasons. A tune that is done well will have no problems in different weather.

 

But, to know for sure, or to tune properly, logs need to be done at the extremes of temp (and elevation too) a car will run in. Then things can be tweaked accordingly.

 

I have heard that running tunes done in the summer will spike in the thicker winter air.

 

One of the worst mistakes a see all the time from tuners causes this. In the false hopes of making the turbo spool better, then put very high WGDCs in the low rpm columns of the WGDC tables. They then drop them off as the turbo spools. But, as temps get a fair bit cooler, the initial WGDC when the turbo spools now is say 80% vs 60%, and you get boost spikes.

 

I take note of IAT all the time in my tunes, and then as I log in 100F IAT or -40F IAT I make adjustments, not to the base tables of timing, WGDC, etc..., but to the comp tables.

[Boostin1657615274]

It's all about getting the engine to run within an acceptable tolerance as the weather changes.

[NSFW]

A good tune will make as much power as conditions permit, regardless of what those conditions actually are. Getting there either takes lots of tuning or lots of experience, but reflashing for weather changes is silly. That's what all those compensation tables are for.