04-24-2008, 10:02 PM
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#1 (permalink)
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Master EcoModder
Join Date: Mar 2008
Location: Wauseon, OH (Toledo)
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The TC - '88 Thunderbird Turbo Coupe 90 day: 28.03 mpg (US)
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My try at a partial grill block
Since from what Ive read, Dodge shadows and plymouth sundances have pretty bad aerodynamics, 0.42 drag coefficient from most sources, I decided to try a partial grill block. Im kinda wary of blocking everything due to engine overheating.
The plastic is plastic wrap from a delicious Digiorno stuffed crust pizza. It seems fairly durable. I taped in on with clear packing tape. I then moved the front license plate up to the other side of the grill, need to get another ziptie for it.
Depending on how hot it runs I may block more of the grill. I also have that bottom opening to work with, though that may someday provide airflow for an intercooler.
__________________
BP+T/G5MR swapped '93 Festiva
Escort GT Block, Garrett T3 50trim, A/R .42/.48
SRT-4 Intercooler
---Bests with BP+T---
1/4 mile ET - 12.99
1/4 mile MPH - 109.8
Best MPG - 36.8
Average MPG - 31 (over 11,500 miles)
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04-24-2008, 10:20 PM
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#2 (permalink)
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Saving Those Greenbacks
Join Date: Apr 2008
Location: UTA
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Your paint looks really good for your car's age so I would be worried about vibrations of the license plate eating away at your paint. Maybe the soft side of velcro or something to cushion it. 
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04-24-2008, 11:09 PM
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#3 (permalink)
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Hybrid Student Driver
Join Date: Nov 2007
Location: Kansas City Area
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The clear plastic is an easy solution. I did the same with my front plate
I'm having trouble fabricating something for mine (I just have the area similar to the bottom of your Shadow). Turns out, I can't fabricate crap. The plate provided a middle 1/3 grille block.
RH77
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04-24-2008, 11:15 PM
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#4 (permalink)
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Giant Moving Eco-Wall
Join Date: Dec 2007
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clear to me is the way to go! stretch it good and it looks almost like it's not there!
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04-25-2008, 12:53 PM
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#5 (permalink)
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EcoModding Lurker
Join Date: Mar 2008
Location: Savannah
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I used plexiglass on mine. It was 10 for the sheet size I needed at Home Depot. It works and looks great. You have a easy shape to cut so it shouldn't be that bad.
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04-25-2008, 12:59 PM
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#6 (permalink)
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EcoModding Apprentice
Join Date: Apr 2008
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i have a 92 3.0 5sp to do ,,i may be able to block the whole grill and pull air from the lower facia ,,looking at a fan up-grade maybe to 
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04-25-2008, 05:36 PM
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#7 (permalink)
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Master EcoModder
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
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bhazard's grille block
bhazard, at Cd0.42, the Shadow's got a lower Cd than what Corvette's had when I was in college.Your slow approach will protect that Mopar powertrain from Btu overload.Good engineering!
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04-28-2008, 11:03 AM
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#8 (permalink)
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Beta-tested it to death!
Join Date: Jan 2008
Location: Oconomowoc, WI, USA
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I just completely covered the grill on my Shadow with duct tape. Then I spray painted it to match.
The whole car is Rustoleum Metallic Blue anyways, so the color matches perfect.
No problems what-so-ever with that. When I stuck some coroplast down the front, I DID have to cut some slots in it to keep the car at the right temperature.
Now if only there is something I could do about the crappy 3-speed automatic transmission.
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04-29-2008, 01:14 PM
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#9 (permalink)
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Master EcoModder
Join Date: Mar 2008
Location: Wauseon, OH (Toledo)
Posts: 383
The TC - '88 Thunderbird Turbo Coupe 90 day: 28.03 mpg (US)
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Well, the car was just over 3/4 tank and I topped it off. Tripmeter showed 101mi, multiply by 1.036 to correct it for oversized tires and get 104.636mi. Divide by 2.74 gallons which is where the pump shut off and I got 38.188 mpg. What? Can a partial grill block seriously give you 10 mpg?
Im skeptical, I dont think Im gonna enter this into the fuel log. Ill run it down a bit and do a real fillup first and see.
The leaky transmission was also a quart and a half low on fluid so that makes things even harder to believe.
__________________
BP+T/G5MR swapped '93 Festiva
Escort GT Block, Garrett T3 50trim, A/R .42/.48
SRT-4 Intercooler
---Bests with BP+T---
1/4 mile ET - 12.99
1/4 mile MPH - 109.8
Best MPG - 36.8
Average MPG - 31 (over 11,500 miles)
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04-29-2008, 10:43 PM
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#10 (permalink)
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Giant Moving Eco-Wall
Join Date: Dec 2007
Location: The Dale, IL (or A-Dale)
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yes, I low fluid=less pickup and power. so more losses at the drivetrain. also have the slipping problem in cold weather.
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