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Author Topic: Do you use grill blocks to improve fuel economy? Back to Topics
Sal30

Rookie Author
Philadelphia

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Message Posted: Apr 28, 2013 1:40:37 PM

I'm thinking of installing grill blocks, getting super light weight steel wheels with moondisc hubcaps, radio antenna removal and wipers removal if I move to LA. My 15" alloy wheels weigh 22 lbs each but the steel wheels for a 2002 Passat only weigh 15 lbs each. Do you think these mods will increase my epa fuel economy from 28 hwy to 30+ hwy? BTW, these mods will cost less than free if I sell my 4 allow wheels.
REPLIES (newest first) Post a Reply
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GLM4205
Champion Author Toledo

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Message Posted: Aug 1, 2014 6:05:17 AM

NO
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8_Ball2014
Veteran Author North Dakota

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Message Posted: Aug 1, 2014 3:51:41 AM

no
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GBMAX
Champion Author Phoenix

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Message Posted: Aug 1, 2014 2:34:54 AM

no
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ricebike
Champion Author New Jersey

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Message Posted: Jul 31, 2014 8:28:36 PM

I only see grill blocks on diesels. Not on gas powered vehicles
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Jackson126
Veteran Author Virginia

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Message Posted: Jul 30, 2014 3:32:40 PM

No
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dontuknowOH
Champion Author Ohio

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Message Posted: Jul 29, 2014 9:50:14 AM

There are so many types of material available today on the market that I might DIY a newer version for my present vehicle. Swinging door style, maybe shutter blind, flapper valves, louver shunt or rollup blind blocker.

Seems I can't make up my mind, will check on my inventory of supplies, later..... No used mopar stuff on my vehicle yet Woops! delco what's that.... Right now I need 3 water mister orifices (nozzles....& filter.

Sal30 your less a ning of your wheel dynamic weight mass will offer less torque needed at the drive axles each time you start motion in the lower gear. Small savings each time you start motion.I think they make an indoor antenna windshield wire for signal pick-up, rain water repel washer additive, duct tape for areas where coolant air flow doesn't breathe, be careful on that.....micro managing fuel savings(works over long term often!
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twt
Champion Author Virginia Beach

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Message Posted: Jul 29, 2014 5:11:12 AM

A waste of money.
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BCNU
Champion Author British Columbia

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Message Posted: Jul 29, 2014 3:30:34 AM

no
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OilerFan
Champion Author Tulsa

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Message Posted: Jul 27, 2014 11:58:21 AM

I wouldn't bother with grill blocks.
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contiki
Champion Author Ontario

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Message Posted: Jul 27, 2014 7:30:38 AM

Never.....
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dassfg
Champion Author Fort Worth

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Message Posted: Jul 25, 2014 8:20:55 AM

My Ram 1500 Eco-Diesel has automatic grill shutters that adjust for fuel economy
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Dennis783
Champion Author Des Moines

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Message Posted: Jul 25, 2014 7:37:30 AM

nope.
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hoopitup2000
Champion Author Virginia

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Message Posted: Jul 23, 2014 6:52:09 AM

Only in the winter
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RalphHightower
Champion Author South Carolina

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Message Posted: Jul 23, 2014 6:08:06 AM

no
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pt1KY
Champion Author Lexington

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Message Posted: Jul 22, 2014 8:59:21 PM

no
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contiki
Champion Author Ontario

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Message Posted: Jul 20, 2014 7:07:44 AM

Never.....
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dontuknowOH
Champion Author Ohio

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Message Posted: Jul 19, 2014 9:59:34 AM

My understanding of the use for Grill Blocks for the average modern vehicle is; The blocking is designed to aid in controlling the engines peak operating efficient economy normal engine compartment temperatures.

More stable, quicker intervals of stable, that are near peak efficiency engine temps, against no matter what exterior degrees are available, but during whatever outside weather conditions are.

Engines simply run and get more energy out of each drop of fuel mix when they are running within the correct thermal designed operation range of controlled temps as designed. Ultimate expansion pressure derived(goal).

Restarts, fresh cold starts, any type other than continuous running even idle requires a certain % of fuel boost along with performance increased engine loads(operation speed).

Human's core heat temps. V/S engine's core heat, well no logical realistic comparison, cabin heat, yes correlates with Human comfort.

Grill Blocks can have another advantage, like a boost in styling and a possible aerodynamics benefit for MPG. savings at moderate/higher travel speeds.
They must have quality control by the designers for preventing any Engine compartment overheat of the vehicle also, depending on the ECM Boss on modern vehicles. The blocking devices work along with the engines cooling system to prevent any overheat damage. Just my take......
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contiki
Champion Author Ontario

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Message Posted: Jul 19, 2014 7:38:41 AM

Never...........
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ggg452
Champion Author Manitoba

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Message Posted: Jul 17, 2014 10:29:47 AM

No...
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HideMKE
Champion Author Milwaukee

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Message Posted: Jul 17, 2014 9:21:18 AM

no
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Floridaman2013
Champion Author Florida

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Message Posted: Jul 17, 2014 7:58:23 AM

Steel wheels would work to some degree but would not use any grill block, especially in LA.
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hoopitup2000
Champion Author Virginia

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Message Posted: Jul 17, 2014 6:42:24 AM

No grill blocks in the summer. Though work well during the colder months.
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MertieMan
Champion Author Lexington

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Message Posted: Jul 17, 2014 6:21:19 AM

And you are thinking of overheating your engine in the process also.
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redfish67
Champion Author Dallas

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Message Posted: Jul 15, 2014 9:31:32 AM

no
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Awing1
All-Star Author Ontario

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Message Posted: Jul 15, 2014 8:09:25 AM

No, I don't use, but it will help improve gas mileage in terms of light weight.
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dassfg
Champion Author Fort Worth

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Message Posted: Jul 15, 2014 7:50:58 AM

My Ram1500 Eco-Diesel has grill shutters that open or close as needed to help the efficiency of the engine
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contiki
Champion Author Ontario

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Message Posted: Jul 15, 2014 7:20:45 AM

Never........ever......
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dontuknowOH
Champion Author Ohio

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Message Posted: Jul 12, 2014 8:26:19 AM

Many years ago during Winter, a dual piece of slotted cardboard box material worked for a quicker engine warm-up on an Model A Ford, no grill but the radiator front surface. Used an old junk hood lock pull cable salvaged from the junk yard to remotely connect the shutter movement of the one half(2nd. cardboard piece)device. Port holes adjusted(aligned) to prevent overheating while driving fast @ 47MPH or less.

Those cars had an onboard carb regulator rod mixture adjustment which could be leaned out after warm-up (remotely) located on the passenger side. That saved fuel, along with the blocked radiator fabricated cardboard in place. Motto>>> What Works... works often "GREAT"! Nearly 60 years ago!
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hoopitup2000
Champion Author Virginia

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Message Posted: Jul 11, 2014 6:09:57 AM

Only in the winter
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contiki
Champion Author Ontario

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Message Posted: Jul 10, 2014 7:12:48 AM

Never.........
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counterattack
Veteran Author Los Angeles

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Message Posted: Jul 6, 2014 7:21:44 PM

Maybe .5MPG increase. Light wheels could increase driving dynamics.
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contiki
Champion Author Ontario

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Message Posted: Jul 6, 2014 8:17:31 AM

Never.......
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puddy
Champion Author Wisconsin

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Message Posted: Jul 6, 2014 7:27:24 AM

no
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RalphHightower
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Message Posted: Jul 6, 2014 6:07:54 AM

no
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dontuknowOH
Champion Author Ohio

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Message Posted: Jul 6, 2014 4:53:20 AM

I believe reducing the wheel dynamic weight mass by 7 lbs. each x 4 wheels, that would reduce the torque needed at hiway speeds each time you accelerated to a higher travel speed, but still at a steady speed no benefit.

Each wheel spinning acts like a flywheel, and in high gear or Over-drive then torque abilities have disadvantage when speed changes(flywheel action).

I once chopped 13# of weight off an I-6 ICE engine(rod powered)and that gave it spunk on the low rev-up register(mean sound)no savings but fun!

Maintaining engine operation heat when it is shut off can be a real boost in fuel savings. Common engines have a mess of devices/components sticking out everywhere making it difficult for a engine compartment enclosure to accommodate an automatic insulation device that would hold heat then release it to prevent overheating after start-up/operation. All for restart/run fuel savings.

Grill blocks function on a partial basis that way, mainly for colder weather and a help in aerodynamics on some. Bound to help economy stats......
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oilpan4
Champion Author Virginia

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Message Posted: Jul 5, 2014 1:44:22 PM

"Grill blocking only helps fuel efficieny when the driving temperature is under 65 degrees Fahrenheit and when the vehicle is driven under 45 mph. At highway speeds at driving temperatures over 60 degrees Fahrenheit grill blocking can cause the engine to overheat prematurely or cause the radiator fan to work overtime and thus lower fuel efficiency."

Ever hear of a partial grill block? Only an idiot would block the entire grill off in the summer.
If it doesn't work then why does dodge claim their trucks use grill blocks on the highway to improve fuel economy?
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luvmyrv
Veteran Author Winnipeg

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Message Posted: Jul 4, 2014 11:12:33 AM

no
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carinthuist
Champion Author San Francisco

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Message Posted: Jul 4, 2014 10:01:18 AM

no
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twt
Champion Author Virginia Beach

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Message Posted: Jul 4, 2014 5:07:54 AM

A waste of money.
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BCNU
Champion Author British Columbia

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Message Posted: Jul 4, 2014 4:34:28 AM

no
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55Russ
All-Star Author Cleveland

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Message Posted: Jul 4, 2014 12:24:10 AM

Not at all
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Skyjunky
All-Star Author Portland

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Message Posted: Jul 3, 2014 11:56:30 PM

No
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pghbill
Champion Author Pittsburgh

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Message Posted: Jul 3, 2014 10:27:43 PM

won't grill blocks cause overheating except in sub zero weather?
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Nuzan
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Message Posted: Jul 3, 2014 9:15:06 PM

No
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badbobKY
Sophomore Author Lexington

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Message Posted: Jul 3, 2014 9:25:02 AM

no
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puddy
Champion Author Wisconsin

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Message Posted: Jul 3, 2014 8:28:55 AM

no
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eyegotgas2
Champion Author British Columbia

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Message Posted: Jul 3, 2014 8:21:24 AM

Don't know what a grill block is
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OilerFan
Champion Author Tulsa

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Message Posted: Jul 3, 2014 8:02:25 AM

No. I wouldn't do that.
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Floridaman2013
Champion Author Florida

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Message Posted: Jul 3, 2014 7:17:39 AM

Well said drydem.
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contiki
Champion Author Ontario

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Message Posted: Jul 3, 2014 6:59:19 AM

Never.........
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