Satoshi grilles aren't just for looks or are they?

octanejunkie

Elite Member
While this grille mod is seemingly aesthetic, it has also proven fairly functional - potentially increased airflow (due to fewer obstructions) and fewer bugs in the AC condenser core; the latter being the most noticeable.

The stock grille has huge open spaces that allow fairly large objects, bugs specifically, through effectvely blocking birds and boulders.
9e37f0fb75461b9f6099385b37fa2b60.jpg

Photo borrowed from a post by [MENTION=124311]john.diachenko[/MENTION] in the thread http://www.toyota-4runner.org/3rd-gen-t4rs/109468-post-your-satoshi-mod-pics-here-18.html

Depending on the size screen/grille material you choose, you can effectively increase airflow by removing a large obstruction (seen in the stock grille above) as well as block bugs the size of a bee that would normally pass right through the stock grille of any year and lodge themselves in your AC condenser core, impeding performance of your AC.

Are there any downsides to the satoshi mod? Well, yes, beyond the cost and time, you weaken the grille by removing structural material. What this means is a greater chance of breaking the grille in the event of a front end impact or contact with an object on the trail. Potentially a penetration risk too, as there is less material to keep large objects from getting through, but if you pierce your grille on the trail you probably have bigger problems.

While there are purists out there that bash this mod, as well as other mods like projector retrofits, I have found this mod to be an effective upgrade as well as a unique look among the mostly-stock majority of 3rd Gen 4Runners out there.

So if you were looking for reasons to justify what seems like a pointless and vain mod, here they are:
  • -increased airflow (maybe)
  • -blocks bugs, less maintenance of AC condenser core
  • -opportunity to be creative and personalize your front end
  • -costs less than $100 and can be done with your kids or significant other (modding on family time)
  • -it just looks cool lol

Just wanted to post my positive experiences with this "useless" mod
 
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Another point is that if your existing stock grill is already broken it may be possible to mod it by removing the broken center part, if that's where it is broken.
 
So if you were looking for reasons to justify what seems like a pointless and vain mod, here they are:
  • -increased airflow



  • What tests did you do to confirm that?

    24 large holes vs 200? small holes. My bet would be the smaller holes used in the Satoshi mod actually create more resistance thereby decreasing CFM's. Let's here from some engineers on this one. lol
 
What tests did you do to confirm that?

24 large holes vs 200? small holes. My bet would be the smaller holes used in the Satoshi mod actually create more resistance thereby decreasing CFM's. Let's here from some engineers on this one. lol
BLOCKED af lol

Contingent on the grill material used, obviously, but I have my stock grille intact and I'm happy to do a test if you can suggest a method
c699eeb8ec441e69e74821f7e712f59a.jpg


Sent from my Pixel XL using Tapatalk
 
BLOCKED af lol

Contingent on the grill material used, obviously, but I have my stock grille intact and I'm happy to do a test if you can suggest a method

We all know I'm not an engineer and my test methods tend to be using what I have on hand. Since you have both grills and your rig I'd suggest the old fashion wind to face test.

Have the wife cruise at 65 down the highway. Put your head out the window with the grill in front of your face. See which grill "feels" like it has more airflow.

Like I said, we need an engineer for this one. lol
 
We all know I'm not an engineer and my test methods tend to be using what I have on hand. Since you have both grills and your rig I'd suggest the old fashion wind to face test.

Have the wife cruise at 65 down the highway. Put your head out the window with the grill in front of your face. See which grill "feels" like it has more airflow.

Like I said, we need an engineer for this one. lol

You sir are a danm fine engineer in my books
 
Like I said, we need an engineer for this one. lol

My thoughts:

Set up a high velocity blower fan. Secure plastic sheeting to the fan output and the perimeter of the grill to ensure all air flows through the grille. Use an anemometer to read the wind speed behind the grille. Measuring in maybe 9 spots and averaging the readings should give a reasonable idea of how they compare. About $100 in test supplies would get it done.
 
I'm not an engine-nerd either, but a simple-ish bit of math would tell you how much the holes or slots block up the available space in each grill. I'm betting that the total area of the small holes doesn't flow as much air as the big slots.
 
...
  • -increased airflow
  • -blocks bugs, less maintenance of AC condenser core
  • -opportunity to be creative and personalize your front end
  • -costs less than $100 and can be done with your kids or significant other (modding on family time)
  • -it just looks cool lol

Just wanted to post my positive experiences with this "useless" mod

What about weight-savings? :-) If any, probably a few ounces...

With respect to the airflow, on other rides, the mesh actually created less as compared to those stock grilles. Some rather extensive testing was performed (track guys). Don't know if the same is true here...

The measuring of airflow aside, maybe consider getting the cumulative surface area of each grille for comparison purposes. Obviously, having addtional obstructions, like an emblem, wording like "TOYOTA" doesn't help matters, airflow-wise... But then, that's seemingly the attraction here - the aesthetics. I'm quite anal about putting lights and other items in front of that air path, unless I do something else to compensate or even make for an improvement. On of my other cars, as an example, I removed AC (with condenser). I also put a flange of sorts, like a lip, around all four sides of the radiator to better direct or funnel the ambient air through it, with less waisted air going around it (not through the fins)...

With us, so long as coolant temps don't increase, or at least appreciably, I'd let the coolness factor prevail.
 
We all know I'm not an engineer and my test methods tend to be using what I have on hand. Since you have both grills and your rig I'd suggest the old fashion wind to face test.

Have the wife cruise at 65 down the highway. Put your head out the window with the grill in front of your face. See which grill "feels" like it has more airflow.

Like I said, we need an engineer for this one. lol
Can you hate me anymore wishing a wife on me?

Sent from my Pixel XL using Tapatalk
 
My money says that the OEM grill flows more air than the modified one. It's not just the square inches of material, it's the turbulence that restricts airflow. That screened grill is going to create huge turbulence. An ideal solution would give you laminar flow which they have probably tried to achieve to some degree with the OEM grill. Obviously, the branding department has compromised this.
 
When I installed the one pictured in the first post on the left, I was concerned that the smaller grill mesh could get clogged with snow and ice but after running through two Canadian winters with it, I can confirm that has not happened.
 
3rd gens also have an air scoop-like area under the bumper.
Plus the underside of the vehicle creates turbulence that probably adds to the cooling effect through the radiator. It's not as simple as air flow straight through the grill. Don't worry about it.
Go for the mod!
:thumb3:
 

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I'm no engineer but I did go to school to become an aircraft mechanic & I know about airflow. The shape of a wing increases the speed of air over the top faster than under the wing creating lift. Those fins in the OEM grill increase the speed of air into the rad where as the Satochi doesn't.
 

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