Has anyone with a front grill guard noticed any changes in engine cooling after installing it? I am considering putting one on my S, but wonder if it will decrease airflow through the radiator significantly.

 

I recall some tests awhile ago that suggested grills do marginally decrease air flow. But it's probably a wash when considering that they prevent damage by bugs and road debris to the radiator. A crushed radiator certainly isn't working at 100% efficiency.

I use a grill in very hot weather with no problems, but I don't run a front plate.

 

Thanks Mikey. I don't run a front plate either.

 

I bought my s2000 grill from grille-tech.com and even talk to the guy cause the owner has an s2000 also, he says that his grill allow for 68% air flow as compared to 100% without the putting a grill there, i haven't notice a bar of heat increase but some people have with hot temp and driving on an incline, do a search and see.

 

Axcilla, the guy who owns Coastal Metals, has done some temperature testing. Its up on his website: www.hondas2000accessories.com .

 

Coastal Metals grill, no front plate, track event last weekend, about 80F ambient, no problems.

 

What about compensating for the decreased air flow by opening the side vents or increasing radiator heat exchange efficiency using Red Line's Water Wetter? I have considered a vented hood; but those are expensive, even without considering painting costs.

 

I have a grille and no plate. I also have been using Redline WW for about 2K miles and with previous results from my other cars as a guide, I doubt I will EVER see four bars on the S2K. The stuff works. The radiator is just too damn vulnerable for something NOT to be there.

 

I agree. My grill guard should be here next week.

 

That's a false economy. When the bugs and stones bend your radiator fins, you'll efficiency will drop permanently.

I find it far preferable to run a grill. It's easier and cheaper to remove or replace than the radiator.