Reply to all-new 2021 GMC Yukon and Yukon Denali released (they're gorgeous!)

Forum Index » Cars and Transportation

Reply to "all-new 2021 GMC Yukon and Yukon Denali released (they're gorgeous!)"

Subject:

Emoticons





More smilies

Text Color: Font: Close Marks

[quote=Anonymous][quote=Anonymous][quote=Anonymous]I‘ve owned and loved two GMCs but I don’t understand why they keep making the grille bigger with every redesign. They look like their mouths are hanging open at this point.[/quote]

It's a practical necessity for the cooling systems.

An engine is *most* thermally efficient when there is the greatest disparity between temps on the intake air charge and the exhaust gas temperature. Without going into a lot of inside-baseball type equations involving thermodynamics and mechanical engineering that literally 99.4% of you won't understand, just think of it as "a hotter engine is an efficient engine".

But when you design an engine to run hotter, you have to have a cooling system capable of keeping it from cooking itself. And you need airflow - lots of airflow- to help with that cooling. That means a bigger grill for more airflow.

Also, when you factor in full size SUVs like the Tahoe/Suburban , which are designed to tow boat, RV or horse trailers, there are cooling systems for the transmission too, not just the engine. Plus, the air conditioner also has its own radiator. On some turbo models of smaller SUV's (Toyota/Lexus/Honda/Acura/Hyundai) the intercooler has its own radiator too.

So there could be up to three different "radiators" (cooling systems) in the grill, each needing "x" amount of cubic feet of airflow per minute, in order to work properly.

That's why you need giant grills on cars now. [/quote]

Previous engines, of course, didn't need lots of air flow.

Either that, or it's car fashion.[/quote]

Options

	Disable HTML in this message
	Disable BB Code in this message
	Disable smilies in this message

Review message

Search Recent Topics Hottest Topics