Not Logged In Log In   Sign Up   Points Leaders
Follow Us    7:03 PM

Message Forum - Read Message

Category: Fuel Economy > Topics Add to favorite topics   Post new topicPost New Topic
Author Topic: Do you use grill blocks to improve fuel economy? Back to Topics
Sal30

Rookie Author
Philadelphia

Posts:60
Points:2,450
Joined:Mar 2007
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
Profile Pic
dassfg
Champion Author Fort Worth

Posts:1,936
Points:929,920
Joined:Mar 2011
Message Posted: Jul 25, 2014 8:20:55 AM

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

Posts:15,734
Points:3,139,895
Joined:Sep 2005
Message Posted: Jul 25, 2014 7:37:30 AM

nope.
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:1,103
Points:310,500
Joined:Jul 2013
Message Posted: Jul 23, 2014 6:52:09 AM

Only in the winter
Profile Pic
RalphHightower
Champion Author South Carolina

Posts:5,521
Points:1,141,495
Joined:May 2011
Message Posted: Jul 23, 2014 6:08:06 AM

no
Profile Pic
pt1KY
Champion Author Lexington

Posts:1,752
Points:395,565
Joined:Jun 2013
Message Posted: Jul 22, 2014 8:59:21 PM

no
Profile Pic
contiki
Champion Author Ontario

Posts:24,656
Points:963,265
Joined:Sep 2008
Message Posted: Jul 20, 2014 7:07:44 AM

Never.....
Profile Pic
dontuknowOH
Champion Author Ohio

Posts:3,244
Points:56,325
Joined:Aug 2009
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......
Profile Pic
contiki
Champion Author Ontario

Posts:24,656
Points:963,265
Joined:Sep 2008
Message Posted: Jul 19, 2014 7:38:41 AM

Never...........
Profile Pic
ggg452
Champion Author Manitoba

Posts:3,746
Points:783,910
Joined:May 2012
Message Posted: Jul 17, 2014 10:29:47 AM

No...
Profile Pic
HideMKE
Champion Author Milwaukee

Posts:2,120
Points:455,275
Joined:Mar 2012
Message Posted: Jul 17, 2014 9:21:18 AM

no
Profile Pic
Floridaman2013
Champion Author Atlanta

Posts:1,948
Points:360,590
Joined:May 2013
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.
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:1,103
Points:310,500
Joined:Jul 2013
Message Posted: Jul 17, 2014 6:42:24 AM

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

Posts:16,938
Points:3,347,460
Joined:May 2005
Message Posted: Jul 17, 2014 6:21:19 AM

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

Posts:1,168
Points:229,200
Joined:Dec 2013
Message Posted: Jul 15, 2014 9:31:32 AM

no
Profile Pic
Awing1
All-Star Author Ontario

Posts:740
Points:159,335
Joined:Aug 2013
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.
Profile Pic
dassfg
Champion Author Fort Worth

Posts:1,936
Points:929,920
Joined:Mar 2011
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
Profile Pic
contiki
Champion Author Ontario

Posts:24,656
Points:963,265
Joined:Sep 2008
Message Posted: Jul 15, 2014 7:20:45 AM

Never........ever......
Profile Pic
dontuknowOH
Champion Author Ohio

Posts:3,244
Points:56,325
Joined:Aug 2009
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!
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:1,103
Points:310,500
Joined:Jul 2013
Message Posted: Jul 11, 2014 6:09:57 AM

Only in the winter
Profile Pic
contiki
Champion Author Ontario

Posts:24,656
Points:963,265
Joined:Sep 2008
Message Posted: Jul 10, 2014 7:12:48 AM

Never.........
Profile Pic
counterattack
Sophomore Author Los Angeles

Posts:244
Points:88,995
Joined:Nov 2013
Message Posted: Jul 6, 2014 7:21:44 PM

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

Posts:24,656
Points:963,265
Joined:Sep 2008
Message Posted: Jul 6, 2014 8:17:31 AM

Never.......
Profile Pic
puddy
Champion Author Wisconsin

Posts:15,835
Points:3,718,800
Joined:Dec 2003
Message Posted: Jul 6, 2014 7:27:24 AM

no
Profile Pic
RalphHightower
Champion Author South Carolina

Posts:5,521
Points:1,141,495
Joined:May 2011
Message Posted: Jul 6, 2014 6:07:54 AM

no
Profile Pic
dontuknowOH
Champion Author Ohio

Posts:3,244
Points:56,325
Joined:Aug 2009
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......
Profile Pic
oilpan4
Champion Author Virginia

Posts:13,238
Points:326,410
Joined:Jul 2006
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?
Profile Pic
luvmyrv
Veteran Author Winnipeg

Posts:452
Points:319,280
Joined:Dec 2012
Message Posted: Jul 4, 2014 11:12:33 AM

no
Profile Pic
carinthuist
Champion Author San Francisco

Posts:4,423
Points:721,725
Joined:Mar 2012
Message Posted: Jul 4, 2014 10:01:18 AM

no
Profile Pic
twt
Champion Author Virginia Beach

Posts:12,150
Points:1,439,785
Joined:Mar 2005
Message Posted: Jul 4, 2014 5:07:54 AM

A waste of money.
Profile Pic
BCNU
Champion Author British Columbia

Posts:16,451
Points:2,616,400
Joined:Mar 2005
Message Posted: Jul 4, 2014 4:34:28 AM

no
Profile Pic
55Russ
All-Star Author Cleveland

Posts:844
Points:1,862,025
Joined:Nov 2008
Message Posted: Jul 4, 2014 12:24:10 AM

Not at all
Profile Pic
Skyjunky
All-Star Author Portland

Posts:524
Points:95,695
Joined:Oct 2004
Message Posted: Jul 3, 2014 11:56:30 PM

No
Profile Pic
pghbill
Champion Author Pittsburgh

Posts:1,421
Points:877,460
Joined:Jul 2005
Message Posted: Jul 3, 2014 10:27:43 PM

won't grill blocks cause overheating except in sub zero weather?
Profile Pic
Nuzan
All-Star Author Anchorage

Posts:502
Points:461,530
Joined:Jun 2012
Message Posted: Jul 3, 2014 9:15:06 PM

No
Profile Pic
badbobKY
Sophomore Author Lexington

Posts:205
Points:5,345
Joined:Aug 2013
Message Posted: Jul 3, 2014 9:25:02 AM

no
Profile Pic
puddy
Champion Author Wisconsin

Posts:15,835
Points:3,718,800
Joined:Dec 2003
Message Posted: Jul 3, 2014 8:28:55 AM

no
Profile Pic
eyegotgas2
Champion Author British Columbia

Posts:3,489
Points:700,655
Joined:Sep 2011
Message Posted: Jul 3, 2014 8:21:24 AM

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

Posts:15,986
Points:2,787,605
Joined:Aug 2005
Message Posted: Jul 3, 2014 8:02:25 AM

No. I wouldn't do that.
Profile Pic
Floridaman2013
Champion Author Atlanta

Posts:1,948
Points:360,590
Joined:May 2013
Message Posted: Jul 3, 2014 7:17:39 AM

Well said drydem.
Profile Pic
contiki
Champion Author Ontario

Posts:24,656
Points:963,265
Joined:Sep 2008
Message Posted: Jul 3, 2014 6:59:19 AM

Never.........
Profile Pic
drydem
Sophomore Author Maryland

Posts:231
Points:6,140
Joined:Oct 2011
Message Posted: May 2, 2014 7:09:04 PM

The curb weight of a 2002 VW Passat is about +3100 pounds ... a saving of 28 pounds by using super light steel wheels isn't going to make much of a difference in fuel efficiency.

Aerodynamic improvements will help somewhat ( the Passat Aerodynamic coefficient is .31 which isn't that great ) when driving over 60 mph on long highway trips but removing safety equipment like the wipers or the spare tire is a bad idea and will not save you much in energy. However, the easiest and known way to improve highway MPG is to drive at a lower speed, e.g. drive at 55 mph instead of 75 mph.

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. Grill blocking should be temporary.

Most energy loss is from warming up the car and doing a full stop which causes all the energy used to create the forward motion to be loss.

The best ROI fuel efficiency modification is

1. Installing Low rolling resistant tires like the Bridgestone Ecopia or the Michelin Energy Saver All seasons.

2. Installing a ScangaugeII and learning how to hypermile.

3. Installing an electric engine block heater and warming up the engine for about 30 minutes before the car is started from the cold.



[Edited by: drydem at 5/2/2014 7:13:57 PM EST]
Profile Pic
contiki
Champion Author Ontario

Posts:24,656
Points:963,265
Joined:Sep 2008
Message Posted: Apr 19, 2014 7:24:42 AM

Never............
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:1,103
Points:310,500
Joined:Jul 2013
Message Posted: Apr 19, 2014 7:19:03 AM

Yes . . . .
Profile Pic
contiki
Champion Author Ontario

Posts:24,656
Points:963,265
Joined:Sep 2008
Message Posted: Apr 17, 2014 7:04:10 AM

Never...........
Profile Pic
jdda
Champion Author Alberta

Posts:1,209
Points:649,820
Joined:Jul 2009
Message Posted: Mar 30, 2014 9:02:36 AM

no
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:1,103
Points:310,500
Joined:Jul 2013
Message Posted: Mar 30, 2014 12:31:04 AM

Yes, the car warms up noticeably faster on cold mornings as well.
Profile Pic
mhradecky
Veteran Author New York

Posts:478
Points:187,330
Joined:Dec 2012
Message Posted: Mar 30, 2014 12:22:02 AM

no.
Profile Pic
WES03
Champion Author Maryland

Posts:6,585
Points:1,637,340
Joined:Feb 2009
Message Posted: Feb 7, 2014 10:49:47 AM

They tape the grills in NASCAR to improve aerodynamics.
Profile Pic
oilpan4
Champion Author Virginia

Posts:13,238
Points:326,410
Joined:Jul 2006
Message Posted: Feb 7, 2014 10:32:39 AM

You can't see the grill bolcks installed on newer vehicles, they are behind the plastic external grill.
Most people who have them dont even know they are there.
Profile Pic
contiki
Champion Author Ontario

Posts:24,656
Points:963,265
Joined:Sep 2008
Message Posted: Feb 7, 2014 6:47:59 AM

I haven't known any person that has grill blocks on their vehicles....

Crazy idea..........
Post a reply Back to Topics