Just wondering if its wise for me to get the car dyno tuned on a hot day, seen as though the last few weeks have been very hot and my car feel like it has no power....should i wait till later on in the year when it cools down? like seriously its been 30 degrees latley, car feels like powerless compared to the days where its like 22 degrees or less.... cheers
I hate to laugh but 30 is a pretty mild day. heh However relating to your Q. Having a safe tune on a hot day isnt necessarily a bad thing. As at least you know you can give it a squirt and be covered. Issue being is it may be slightly more rich compared to a cold day tune. But would be that minimal its not worthy worrying about. However everyone knows the best way to squeeze every last drop out is with the cold. Furthermore, i find it odd that a measly 8 degrees is giving you performance grief. Here in Adelaide and especially where i work, 40 degrees is a definite performance killer when compared to the low 30s. Its the humidity that are the killing it for me.
Just make sure the dyno shop uses big mofo fans to keep everything cooler. Its the transmission which can over heat if there is not good airflow under the car.
last time i was on the dyno it was a 35 degree day . haha car was getting toasty . still pulled 450 horse on low boost
Higher temp tuning shouldn't really change AFR's, it's your timing advancement that will ward off detonation on a hot day. Fuel should stay the same, as it's the temp of the intake charge that is causing detonation not lean running.
An agressive tune potentially runs leaner on a cold day due to the denser air... By the same logic, a standard, richer tune feels faster on a cold day because of this - more air, same fuel = leaner conditions, moving further away from 10 or 11:1 = more power... As Andy says on a hot day its the timing and increased IT's that can cause detonation...
proabably more like 34degrees in sydney, but i think its the very high humidity 70,80 and yes 90% that really has been killing it... i know this is in z realated as it is both technical and related to zeds as well, but this tune is for a evo 6, so i dont think a safer tune is too much of an issue as they are pretty bullet proof...obviously to a certain extent though.... well winter is around the corner, 2 months or so away so it would be handy to get the car tuned for a normal day of 23 degrees or so.....
