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Aerodynamics Discuss tips and tricks to make your vehicle more aerodynamic.

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Old 08-17-2006, 11:58 AM   #1
SVOboy
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Mounting Coroplast for a Grill Block

Now, I'm going to pull my bumper today so I can respray the black portion of it to make it look spiffy, and I picking I'll grill it up as well. What do people usually use to mount the block on there? Is there anything that perhaps will not require mutilating my bumper?
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Old 08-17-2006, 12:45 PM   #2
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No mutilation, eh? Dan used screws on the Del Camino. Looks like basjoos siliconed his on

I ended up making a kind of bra for mine to avoid that same vexing issue.
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Old 08-17-2006, 12:48 PM   #3
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I've never seen pictures of your bra, but I'm prollygoing to hot glue or something. I imagine it'll peel off...
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Old 08-17-2006, 12:55 PM   #4
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I just made it recently. It's not totally finished. When it is, I'll post some.

It's just a rectangle of black vinyl-ish material with a couple of square holes to let the air through where I want it. Works for me since my car's black. Keeps the bugs & stones off the paint too, I guess.
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Old 08-17-2006, 04:49 PM   #5
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I made a piece of angled sheet metal and attached that to the bumper skin from the underside. I then screwed the coroplast to the angle pieces. For the bottom I used mastic tape. Mastic tape is a roofing product its sticky and stays malible, kind of like silly putty but stickier. Its also sold under the brand "tacky tape".

By doing it this way when I remove the block no screw holes will be visible.
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Old 08-17-2006, 04:52 PM   #6
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I've figured out how I'll do it. Was about halfway through when I punctured my knee with the knife and went to the doctor's. I'll finish up tonight when I can walk around and stuff,
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Old 08-17-2006, 06:09 PM   #7
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Quote:
Originally Posted by SVOboy
I've figured out how I'll do it. Was about halfway through when I punctured my knee with the knife and went to the doctor's. I'll finish up tonight when I can walk around and stuff,
Got any pics of this? You know we want to see.
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Old 08-17-2006, 06:12 PM   #8
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Nah, that's okee. If you want to enjoy some good pain you can stab yourself.
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Old 08-18-2006, 12:48 AM   #9
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I attached my plastic grill block on with zip ties, and black pollyurithane roofing calk, the little bits are 100% held on with roofing calk, and the larger one is zip ties with roofing calk to make it look seamless, I caught a co-worker looking at it one day, baffled at how good it looked.
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Old 08-18-2006, 12:51 AM   #10
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I still have to do the aero mods on my civic.

It will take hours to make a belly pan and the grill block.
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Old 08-18-2006, 04:20 AM   #11
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Leg

SVOBoy,
I knew a guy that was putting a shift kit in his C4 tranny and drilled a hole in his leg while drilling out a hole in the valve body separator plate He was in to big a hurry to go in his shed and use his work bench. Are you two related?
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Old 08-18-2006, 05:46 AM   #12
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I used the technique as outlined is this post.

http://www.gassavers.org/showthread.php?t=701

I had to drill small holes in the grill slats but the drywall screws seem to be secure. See the following link for pics.

http://servercage.com/wordpress/?cat=7

I cut the hole in front of the radiator ~3.5" x 4". I recently went through some hilly terain in VT and experienced some level of overheating. I had to put the heater on going up the longer hills. I might open it up a bt more but the temps are getting cooler around here.

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Old 08-18-2006, 08:44 AM   #13
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Quote:
Originally Posted by SVOboy
Nah, that's okee. If you want to enjoy some good pain you can stab yourself.
Okay I'll let you suffer in piece. Would you want to see the pic of my arm that I burned a month ago. I lifted a walk behind blower into the truck and casual wrapped my arm around the muffler. On the inside of my elbow.

Of course I'm kidding.
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Old 08-18-2006, 11:44 AM   #14
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Haha, go muffler burns. I took off part of my finger print the other day with one,

Pictures pretty soon!
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Old 08-18-2006, 12:43 PM   #15
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Awful.
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Old 08-18-2006, 01:32 PM   #16
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Quote:
Originally Posted by theclencher
Bras peeling off- is that a bad thing?
The first bra joke took a lot longer to materialize than I thought!

Maybe I should have called it the "bro"... or what's the name they used in that Sienfeld episode?
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Old 08-18-2006, 01:33 PM   #17
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Manzier.
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Old 08-18-2006, 01:47 PM   #18
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Ready for pizzaint.
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Old 08-18-2006, 03:13 PM   #19
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Looks good.
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Old 08-18-2006, 03:16 PM   #20
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Thankee. I repainted a tiny part of my trim for practice and it looks lovely. Car will look brand new when I'm done,
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Old 08-18-2006, 03:58 PM   #21
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Excellent. How did you attach the foam and Coroplast?
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Old 08-18-2006, 04:00 PM   #22
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Looking good! Are you going to make a section that you plug the hole in the winter time?
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Old 08-18-2006, 04:02 PM   #23
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The foam was just to mock up more easily, but as you can see in the 5th photograph I put little wedges down in the two holes and glued those to the sides, then the coroplast to the top.

For the center part it just kinda rested and I glued from the back.
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Old 08-18-2006, 04:02 PM   #24
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Quote:
Originally Posted by zpiloto
Looking good! Are you going to make a section that you plug the hole in the winter time?
The hole will mostly be covered by license plate anyway,
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Old 08-20-2006, 11:46 PM   #25
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Bling:


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Old 08-21-2006, 11:24 AM   #26
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I like...

Sweet! I am looking to do the same to my del Sol. I can't wait to see your mileage delta from this mod.

Very nice work!
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Old 08-21-2006, 11:37 AM   #27
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I'm not even sure if I'll be driving the car, , though I'd love to see a change!

Have you seen dan's grill block on the old del sol?
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Old 08-21-2006, 08:01 PM   #28
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www.crxmpg.com/grillblock.html for the full write up. Won't post it in the diy section here since it's been covered enough, unless someone wants me too. (Besides, we already have this thread.)
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Old 09-06-2006, 03:16 PM   #29
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Bumper is in my garage. Pick up my coroplast (corigated plastic as per the sign shop) tomorrow for $11.22 for the 4 x 8 sheet. Hope to have mine on this weekend. I am thinking of putting in no holes. Has anyone gone no holes?
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Old 09-06-2006, 05:31 PM   #30
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Your coroplast is cheaper than my coroplast

Just picked up another sheet for my undertray for $18 + tax.

And I'm going to have lots left over. I could have bought a bunch of little scraps and knitted them together into a patchwork, but decided to just do it big.
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