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Old 06-12-2017, 05:33 PM   #1
Reserector
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Default Grill Overkill

I needed more airflow for crawling with the v-8 powered Flaming Marshmallow. I finally went ahead with an idea that has been rattling around in my head for quite some time.

Yes, it is heavy, but is has no restriction, and will certainly protect the front from buzzards and such.

I call it Operation: AIRFLOW
When crawling on hot days with the AC on full blast, the truck will begin to run hot.
I either have to put it in neutral and raise the idle for a minute, or get moving to get more air through the grill.
I boiled the problem down to too much blockage in front, and possibly not enough exit flow.

Starting at the front, the FM is about to get a VERY custom grill.
The stock Nissan grill blocks a lot right at the top where it joins the hood. The center section of bumper is useless, and blocks a bunch more. It all has to go.

Keep your eye on the bar grate on the ground...
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Old 06-12-2017, 05:34 PM   #2
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Here's the finished grill.
I'm thinking about painting the edges of the upper portion so it looks like an 80s aluminum bar grill. It might make the lower part less noticable. Actually, the winch will hide most of it.
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Old 06-12-2017, 05:35 PM   #3
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And the final touch...
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Old 06-12-2017, 11:22 PM   #4
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I like it! should be a lot better! and the best part is if you have to, you can always take it off cook up some burgers, put it back on and your go to go!


lol
I really do like it(just jealous), you have some skills!
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Old 06-13-2017, 01:07 AM   #5
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I would have thought the airflow would be fine going through there. did you use the fan shroud? I thought you did. which makes me think you might have a fan clutch going out or was the section of the bumper covering up that much of the radiator?

BTW, that grille looks awesome.
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Old 06-14-2017, 05:33 PM   #6
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I used the stock chevy shroud, albeit an inch closer to the engine. I replaced the fan clutch, but it made no difference.

The top pf the Nissan grill blocked about 1 1/2" all the way across, and was tight to the hood. The hood blocks a few more inches of radiator. Eliminating that blockage alone gave me back fifty square inches of airflow, not to mention allowing air to get up under the edge of the hood more easily.
The rest of the Nissan grill was fine, as far as airflow. Well, that is except for the blocky places on the sides. One of those almost completely blocked my power steering cooler.
The bumper was serving no purpose, and definitely in the way.

I ordered an anemometer to test air velocity. When it arrives, I will mock it back up the way it was and get a reading. That will give me a benchmark to improve from, or to see if I made a difference at all.
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Old 06-15-2017, 12:35 AM   #7
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put some strong electric fans on there. push that air and running warm shouldnt be a problem.
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Old 06-15-2017, 01:11 AM   #8
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I hope my rad works well then. I'm waiting for your results.
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Old 06-15-2017, 09:12 PM   #9
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Don't blame ME for your procrastination.
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Old 06-15-2017, 11:59 PM   #10
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Quote:
Originally Posted by Reserector View Post
Don't blame ME for your procrastination.
:ro fl2:
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