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Old 06-24-2008, 11:27 AM   #11 (permalink)
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Hello,

I think it would help if you put flush covers on the openings that are already blocked. Recesses are bad...

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Old 06-24-2008, 11:42 AM   #12 (permalink)
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Quote:
Originally Posted by NeilBlanchard View Post
Hello,

I think it would help if you put flush covers on the openings that are already blocked. Recesses are bad...
your missing the point, that the grille has to look untouched, thus external blocks aren't allowed
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Old 06-24-2008, 01:06 PM   #13 (permalink)
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Quote:
your missing the point, that the grille has to look untouched, thus external blocks aren't allowed
Then a grill block isn't really what you're looking for as that is the point of a grill block: to block the grill. Blocking behind the grill will likely give you an increase rate of engine heating which is a good thing, but that's a mechanical benefit and not so much an aerodynamic one.

To achieve the [external] aerodynamic benefit of a grill block and still have the grill visible, look into see-through materials like cheap plastic picture frames and whatnot that you can attach via zip ties or double sided tape.
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Old 06-24-2008, 02:43 PM   #14 (permalink)
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Got my more permanent upper and lower blocks done this weekend. The paint isn't quite a match but I am already noticing an increase in mileage... I have almost 450km on my tank and my gas gauge is only at 1/2 tank. I am expecting a 2-4 mpg rise based on the 80-90% of highway driving I do.

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Old 06-24-2008, 02:53 PM   #15 (permalink)
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Quote:
Originally Posted by NeilBlanchard View Post
Hello,

I think it would help if you put flush covers on the openings that are already blocked. Recesses are bad...
I'm not sure it's always that simple. An egg crate grill, at a large angle to the incoming air, ought to be about the same drag whether it's blocked on the front or rear surface. A stagnation bubble will form in front of it and the drag would be more pressure related instead of friction.
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Old 06-24-2008, 06:12 PM   #16 (permalink)
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[QUOTE=i_am_socket;37889] Blocking behind the grill will likely give you an increase rate of engine heating which is a good thing, but that's a mechanical benefit and not so much an aerodynamic one.

QUOTE]

blocking the radiater will not give you an increased heating rate!!! the water does not leave the engine untill it's HOT (unless you dont' have a thermostat, and if thats the case, you are asking for problems).
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Old 06-24-2008, 06:13 PM   #17 (permalink)
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i have a large external grill block on Jeep 2, i have noticed a decent increase but i cannot give numbers at the moment because i added it 90 miles into the last tank, and will not finnish off the tank i am on for another 3-4 weeks. anyhow, observations on my end, i tow other vehicles quite frequently, 3 cars in the last two weeks, and have had no overheating, i drive mainly in the city and a grill block is most functional on the highway.

if you wanted the grill to be visible you could always use a piece of plexi glass, it doesnt have to be thick but i definately understand not wanting it to be visible so i wont nock on you for putting it behind.

anyhow, remember, every little bit helps and grill blocks are cheap so even if you only get 1 mpg increase you still come out a little farther ahead.
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Old 06-24-2008, 07:59 PM   #18 (permalink)
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Malibu I hear you. I want the reward with out the look of. Just something simple. I want to design something that will just look sleek. I might just take the bumper off and fill in my honeycomb design and grind smooth and spray black. Here are some picture. For the bottom I have not decided yet.
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Old 06-24-2008, 08:01 PM   #19 (permalink)
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Also I plan to delete the big H
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Old 06-24-2008, 08:43 PM   #20 (permalink)
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I have a 96 civic, small upper grill and large lower intake, at speeds over 45 is there enough air to cool the engine if I block both?

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