Quote:
Originally Posted by Dragoneye
Shno's House of Z has no topic. You can ask anything you like, in here -- by the way -- Welcome to the forum!!! 
Heat soak, essentially, is referring to the engine transferring heat from the block up towards the intake....in this case - it's up towards the supercharger on the LSA...and since the supercharger is metal, it retains and conducts this heat into where the air is being compressed and into where it's supposed to be cooled down by the intercooler (yes, the intercooler helps cool the air-charge).
Hot air being sucked into the combustion chamber is not good - it lowers the effective power the engine can produce due to physically there being LESS air inside to expand and push the cylinder down. So the goal is to chill the air as much as possible before it enters the combustion chamber. Heat-soak is counter-productive to this goal.
Over several high-rpm/load runs (such as racing or dyno tuning)...there's a lot of heat conducted to the supercharger area...some cars deal with it better than others...Ford improved the 2012 GT500s vastly over their past incarnations, for example.
I'm of the firm belief that these claims of terrible heat-soak and IATs in the ZL1 are.....exaggerated. |
And you don't have to look very far for confirmation that cooler air is conducive to more power, any day that is cool at a NASCAR track, you'll hear the announcers talking about the engines producing more HP due to the cooler air. And how well I remember that my '69 Z/28 always ran the best as soon as the roads dried after a cool rain (moist air helps produce better HP also), in fact all of my vehicles run better when it's cool/moist.
Clyde