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Is it just my imagination or do I definitely notice that my PSD doesn't respond as well with the accelerator when the weather is as freakin hot as it is here? We are over 100 with a heat index today of 115 and as the temp climbed during the week it seemed my truck ran better early in the morning when it was cooler (mid to upper 70's). I installed my 4" turbo back exhaust yesterday thinking that might really help but I can't tell a huge difference. Mods are listed in my signature but I think I have done the basics to let it breathe more freely.

Also, has anyone ever taken the thin black rubber covering that covers the space between the grille and the radiator? It looks like a matter of just popping a few plastic grommets to remove it. Would that help or hinder airflow or open air intake performance?
 

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yea hot weather will reduce performance of any vehicle. the plastics you are talking about should not be removed as they are made to direct flow through the radiator
 

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That rubber cover is there for a reason. It directs the air through the coolers and not out the top, so leave it alone. My truck pulls awesome whether it is 100 or 20 degrees outside, haven't noticed much of a difference. If you can tell the difference you are more observant than I.
 

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i can tell also.....
 

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Living in Phoenix I can tell the difference in performance when it gets hot. It's not a big difference but is noticeable. When I notice it more is when we get monsoons and the temp drops and the air is heavier due to cooler temps and humidity. The truck seems to have a bit more power.
 

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thats because the cooler the air is the more oxygen that is in it. same principle that applies that at sea level there is more oxygen in the air than at high altitude.
 

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thats because the cooler the air is the more oxygen that is in it. same principle that applies that at sea level there is more oxygen in the air than at high altitude.
WINNER!!!

Ask any pilot about warm and cold air....


Believe it or not, in Las Vegas it can get hot enough that planes can't take off because the air is too thin.
 
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