Not sure if anyone notices this, but my Fit just feels real sluggish/tired after its been sitting for a bit in a hot parking lot on a hot day. In the morning right out of the garage when its cooler, it feels peppy and ready to go, and when parked in a parking structure with shelter, its not terrible either.

But drive it out somewhere, park it for a bit in the hot sun while you shop, and you come back to a tired car, with the engine seeming far less willing to play.

 

i havent really noticed this, but i will definatly be paying closer attention now to see if i notice it too!
i have noticed however on the really cold days here in calgary when its -30 Celcius it feels pretty sluggish until its been driven for fifteen or so minutes

 

this is normal not only on our cars but all combustion engine cars. heat soak is more prone on smaller blocks especially with high humidity, full load.

my GE is especially slow today in 90F with heat index over 95F.

 

Here is some info on heat soak. http://cjbfire.com/Heatsoak.pdf

Here is some info on oil oxidation. http://www.stle.org/assets/document/...ember_2009.pdf

 

Never noticed this condition here in the desert of southeastern california, northern baja mexico. It has been 105+ plus here for the past 1.5 months and will be this way for another 2 months or so. Fit is as peppy as ever, no matter if it has been sitting or on the go. Couldn't be happier with my vehicle. All car have heat shock somewhat; however, Fit seems to be better than most. Good luck.

 

that's because you dont have winters to compare.

 

You are correct on the winters for comparison. Spent the past winter in Missouri for 2 weeks and no difference, from now, there either. It does get in the 30s and 40s at night here during winter; however, no terribly freezing weather here in so cal.

 

you might need to calibrate your "go" in your head then.

the Fits are slow in the summer heat vs cold winters. cold as in 20F or below. thats when it can get sort of entertaining.

 

Heat soaking on my Fit is not hear as bad as my MK4 GTI 1.8 Turbo, Way too small of a intercooler contributed to that, I was thankful every time winter came around it felt like I threw a 150 shot of nitrous in the thing.

There were days that I couldn't even spin the tires on command from a car with over 220 wheel hp.

 

I'm soaking in +30 above ambient temps at idle after hard runs and +5 above ambient while coasting after hard runs. Openning the throttle immediately drops temps to 3-4 above ambient. This is NA mind you. I never had this with the fmic.

 

Uhm, no I don't notice any difference.

But, keep in mind I'm in San Antonio, Texas were today my thermometer said it was 110 degrees at the warmest.

 

Right now, my car's morning-time performance, and afternoon performance are quite a bit different. I have to run around in the 102+ temps with the a/c off just to have enough power to feel safe in traffic.

 

I usually have the AC going full blast too, after letting it soak in the sun... guess its asking too much of the poor car.

 

I notice it a lot here in Louisiana. The average temperature around here during the summer has been about 98*F with 60-70% humidity. The heat index is usually around 103*F. I don't know much about "heat soaking" but I attribute the lack of power to running the A/C on full power

 

It hasn't been to bad in baton rouge the last few days. The rain has been keeping the temps down. But can't really use the power in the rain.. But when I was up north in Ruston last week it was bad. Altitude combined with heat and hills. Pshhh my poor little fit was not a happy camper.

 

I've noticed my fit likes higher octane gas in the extreme heat / elevation, and I have experienced heatsoak while doing 90 through the desert of texas, new mexico, arizona, and california a few weeks back. I think for the extreme heats over 100*F we probably could benefit from a larger radiator, and when the your cruising 10mph over the 75-80mph speed limit.

 

i made small plates that stop air from traveling around the radiator. (factory kinda has pieces to stop this but idk if it works) so i made biggerr 1s and i noticed ~8* lower temps on my ge8

 

And a larger condenser and cooling fans. The AC gets pretty pathetic while sitting at stop lights and in bumper to bumper traffic.

 

Just to split hairs. Heatsoak refers to an increase in intake temps above ambient. Saying a car runs worse when it's hot out is like saying the sky is blue. Heat soak is a very specific and ultimately, correctable problem. I'm just too lazy to correct it,

 

I seen first hand heat soak and what water injection did with 7.5 pounds boost over the weekend. I am curious if it would work in a stock Fit?