i dont know jack about tuning... i was just wondering if you need to retune winter vs summer? or if you can run the same tune/boost all year round. i live in ohio where temps range from 0-90. any input or info would be great thanks.

 

Im going to take a stab at this so i can be corrected later on, but I believe since you live in a place where the climate dramatically changes, then yes you will have to get a summer tune and a winter tune. Please some one correct me if Im wrong here but you run leaner in the colder months and richer in the hotter months.

I have a 05 GG MR too

 

Depends on the tune. If the car is tuned on the edge of survival, then, yes, you'd be best off having alternate tunes for all conditions. OTOH, if the tune is conservative with an emphasis on reliability and safety, you can run it anytime with no worries. Your concerns are certainly legitimate. The ONLY way to know whether your car is performing up to par is to log. That means that you'll need to spend some time learning about tuning and understanding the constraints at play. If you're not willing to do this, you're left with trusting someone else with your car's health and longevity. Good luck.

 

If I'm tuning a car in extreme weather I always suggest that my customer shoot me a fresh log when the weather changes again just to be sure it's okay. Most of the time we don't have to make an adjustment and if we do, it's minor.

 

Several good points have been made here. The ECU can compensate to a certain extent. I think it really matters what power level you are at. If you have a stock turbo with minor bolt ons you should be be ok, But if its heavily modified you are moving much more air so the variance is amplified.

Like stated above the only way to know is log it.

 

its just a 2005 evo mr
stock turbo
stock head
stock block
hallman mbc
licp
intake
tbe
fuel pump (soon)

it will be that way for awhile till clutch, cams, injectors, e-85 ect

 

where did you come up with that information?