Grill Block, Sucess! - Fuelly Forums
Go Back   Fuelly Forums > Fuel Talk > General Fuel Topics
Search Today's Posts Mark Forums Read
Thread Tools Display Modes
Old 02-03-2007, 11:59 AM   #1
Registered Member
Join Date: Mar 2006
Posts: 675
Country: United States
Grill Block, Sucess!

Ok, the tank I just posted is my highest, to date. From what I've been able to experience, a grill block helps.

I tried a grill block by just blocking off the inlets with packaging tape, which looks pretty ugly and it did have some positive effects. I changed to a cardboard shaped grill block, with more of a lower nose to it.

With this change, I have had my highest mileage tank, so far. This tank was a combination of about 2/3 freeway and 1/3 city, although a good portion of the freeway driving was stop and go traffic.

Highly recommend this modification. It appears to be capable of delivering 5%-10%, in my experience.

Gary Palmer is offline   Reply With Quote
Old 02-03-2007, 02:04 PM   #2
Registered Member
ELF's Avatar
Join Date: Jan 2007
Posts: 245
Country: United States
congrats, on your best tank, I recently blocked mine too. But, weather has been colder so I am not seeing results, when the weather warms I will find out how good it works.

ELF is offline   Reply With Quote
Old 02-03-2007, 03:30 PM   #3
Tuggin at the surly bonds
Silveredwings's Avatar
Join Date: Apr 2006
Posts: 839
Country: United States
Nice work, I need to do that too.
Reality is merely an illusion, albeit a very persistent one. - Albert Einstein
Silveredwings is offline   Reply With Quote
Old 03-04-2007, 01:16 PM   #4
Registered Member
brucepick's Avatar
Join Date: Feb 2007
Posts: 722
Country: United States
Location: Connecticut
I'm having trouble separating whether the improvement is from getting and keeping the engine warmed up sooner
- or
aerodynamic improvements from less turbulence in the engine compartment and under the car.

You folks think it's both? Or?
Currently getting +/- 50 mpg in fall weather. EPA is 31/39 so not too shabby. WAI, fuel cutoff switch, full belly pan, smooth wheel covers.

Now driving '97 Civic HX; tires ~ 50 psi. '89 Volvo 240 = semi-retired.
brucepick is offline   Reply With Quote
Old 03-04-2007, 02:32 PM   #5
Registered Member
Join Date: Oct 2006
Posts: 245
Country: United States
most likely a combination of each.
"Sylvie" 2000 Honda Insight 5 Speed

LxMike is offline   Reply With Quote
Old 03-05-2007, 08:32 AM   #6
Registered Member
Join Date: Mar 2006
Posts: 675
Country: United States
From my experience I believe it's totally due to the aerodynamic impact. I have mine blocked off so that it's down to a couple of 3"*4" holes, one in each side. The engine temperature in that configuration runs the same as it did before I did the block. I did run a little warmer going up hills, so that's why I made the second opening. As it warms up I anticipate putting either more openings or removing the grill block, to keep the temperature at it's normal range.
Gary Palmer is offline   Reply With Quote
Old 03-05-2007, 11:15 AM   #7
Supporting Member
cfg83's Avatar
Join Date: Sep 2006
Posts: 1,779
Country: United States
Hello -

I have been fiddling with my grill block in the last week or two. I am trying to get a balance between keeping the engine coolant at 190+ degrees F while NOT overheating when I am stuck in traffic. I don't like going above 210 degrees F, so I have a narrow window to work with. This temperature window is my "comfort zone". Maybe I could go higher, but I don't want to until and/or unless I learn more about the engine's safety zone.

One thing that I have found is that with a full grill block, my "mixed air" warm air intake doesn't provide enough hot air. I figured out that with the grill block, the air around the exhaust header (front and center in my engine bay like most front wheel drive cars) is stagnant and does not move into the airbox. With a grill block that is partly opened (bottom dead center), the outside air being pushed into the engine bay allows the hot air to get pushed into the airbox.

Alternatively, I could restore my air dam to push that air in and go with a full grill block and see what happens.

This may be something that only I am seeing because of my "mixed air" hot air intake. Other people probably won't see this if they go with 100% hot air from the exhaust header or use the IAT resistor mod.


Old School SW2 EPA ... New School Civic EPA :

What's your EPA MPG?
cfg83 is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
View model averages? unicrombie Fuelly Web Support and Community News 4 11-09-2011 06:32 AM
Got stopped by the police ... MetroMPG General Discussion (Off-Topic) 14 08-05-2006 06:04 AM
Toyota Grand Prius krousdb Automotive News, Articles and Products 5 07-26-2006 02:44 PM
How To Make A Rice Burner Run 14's iburnh2o Fuelly Web Support and Community News 7 04-18-2006 08:58 PM
Crashing-Not good for mileage! diamondlarry General Fuel Topics 17 01-03-2006 04:58 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -8. The time now is 07:30 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.