New 2024 grill insert experiment

[smlobx]

It's the other way around. The base of the windshield is a high pressure area, not a negative one. Air stacks up in that area. That's why cowl induction intakes work well.

I was trying to find the information I based my comment on that we made the modification on my first Porsche 944 S2 track car but wasn’t able to find it.
I did find this discussion on the JL Diesel forum and thought it was interesting but no analytical data..
https://www.jlwranglerforums.com/forum/threads/new-grill-for-better-airflow.116827/page-2

Seems like a relatively easy mod to make and easily reversible if you didn’t like it for some reason.

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[GoFastJTR]

This has been tested at length on the ecodiesels that a grill does not improve cooling.

doubtful any results will be seen on the gas jeeps either.

What worked for me was Rubicon hood scoops from S&B. Lowered my oil temps by over 10 degrees. I can’t get my oil temp to go over 250 even in 100 degree weather, driving up a mountain with AC on full blast.

 

[Wolf Island Diver]

I was trying to find the information I based my comment on that we made the modification on my first Porsche 944 S2 track car but wasn’t able to find it.
I did find this discussion on the JL Diesel forum and thought it was interesting but no analytical data..
https://www.jlwranglerforums.com/forum/threads/new-grill-for-better-airflow.116827/page-2

Seems like a relatively easy mod to make and easily reversible if you didn’t like it for some reason.

I’ve been reading that JL thread. Man, they like to snipe at each other over there and apparently we’re all assholes on this forum, ?. I’ve been on some threads on the JL forum and experienced general belligerence. Not as bad as the IH8MUD forum where I got called a “spy” and a “plant” when I asked if one of the venders on the forum I was having comms issues with, was in fact legit.
My own biases would have me assuming the we Gladiator (truck) people would be more disagreeable than the Wrangler people. Of course a lot of us ARE Wrangler people too. Doesn’t seem to be the case. This is usually a pretty cordial forum. Maybe my incorrect assumptions come from all the Ram and Super Duty drivers that have tried to murder me on the highways over the years.

 

[Wolf Island Diver]

I hate to post this here or anywhere because there’s already so much conjecture on additional diesel cooling and I’m just adding to it. That being said, I have it in my mind that I read somewhere that most modern vehicles are designed so that air flows from the grill through the engine compartment and exits from underneath the vehicle at the back of the engine compartment. Would fans, not CPU fans but something like larger oil cooler fans mounted at the back of the engine compartment, assuming you could even fit them there, create more negative pressure in the engine compartment and allow more air to move through the space carrying more heat out of the compartment?

 

[Maximus Gladius]

I believe in you OP! You should redirect your AC to blow into the intake too. That should solve most all the overheating problems.

 

[JW Jeep]

I don’t think you will see much difference at all. Waste of money but we all do that on our jeeps ?. Look at my grille in the pic. You must already have these wide insert openings already ? Furthermore the radiator and condenser can only flow so much air through the fins. Look how much bigger the grille grates are then the radiator. Maybe a little on towing but that’s it ?
I do remember people in the dead of winter back east putting a little card board in front of radiators for extra heat many years ago. Good luck and thank you for this test. can’t wait for your results ?

 

[Jobofly]

The structure of the JT had already been certified. Any changes at all to the width of the radiator meant changes to the structure, and re-testing, re-certification. Not that it can't be done - but not without some other sacrifices in money, time, and space for other things (look to the sides of the radiator and see how far anything could be moved and not interfere, and how much steel would be removed, resulting in different frontal and corner impact results)
If such a change is made, I'd expect it with the 24 or 25 model year - if then, since their focus is shifting (we won't go there, eh? Or as my 9 year old grandson would say "we don't talk about that")

Air circulation around the engine has almost no impact on the engine cooling (other than air getting back out of the engine bay)
Cooling is all done by oil and coolant. Directly for the oil, indirectly for coolant. Frankly, I've seen big engines tucked into really tight quarters and not worry a bit about cooling as long as the oil flows fast enough and there's an adequate cooling system. Think of engines in ag and industrial equipment - some of it fully shrouded with almost no air circulation at all, or those stuffing a 360 into an already tight Eagle where the steering column had to be revamped and things cut to allow room for exhaust manifolds to fit. Pretty much no air except what flows through the radiator and they generally route that downward (and end up with nice warm floor pans)
You have a natural "draw" under the vehicle would be my guess - to pull hot radiator air down and out, a natural flow. Hood vents may be too far forward to be effective - something along the cowl, perhaps? Just thinking aloud.

I don't believe it's an air escape issue - there's plenty of room for the air to go down and back in these even with the V8.

Wait so if air circulating around the engine doesn’t make a difference then why would an 850 watt fan be better than a 600 watt fan?

 

[Hootbro]

Wait so if air circulating around the engine doesn’t make a difference then why would an 850 watt fan be better than a 600 watt fan?

The fan is actually pulling air/heat from the radiator so a higher wattage running fan would make a difference.

Air around a engine and the compartment is a different thing all together.

 

[Jobofly]

The fan is actually pulling air/heat from the radiator so a higher wattage running fan would make a difference.

Air around a engine and the compartment is a different thing all together.

Gotcha thanks for clarifying.

 

[ShadowsPapa]

Wait so if air circulating around the engine doesn’t make a difference then why would an 850 watt fan be better than a 600 watt fan?

Hootbro nailed it. You are drawing air through the radiator, a heat transfer device.
If you don't have air flowing through the radiator then the coolant goes back to the engine almost the same temperature it came out at.

That fan could literally pull air through the radiator and direct it out the bottom away from the engine and it would still work.

Heat rejection is quite an engineering topic.
I could be wrong here but it seems that only 40% of all heat energy resulting from burning fuel is used to power the vehicle, 60% is rejected - out the cooling system, exhaust, and via internal friction.

 

[River2016]

Here gents.....save some money and get it already color matched to your truck.........IN FTW

https://www.distinctionapplied.com/2024-grille

Bookmarked

 

[jebiruph]

The pieces on either side of the radiator are plastic so they are of no structural importance… they are just plastic blocks that disrupt the flow of air when it hits that area. If they were made more at a 45 degree angle (or with a slight concave curve) this would promote a more laminar flow of the air toward the radiator…

I agree that the hood vents MAY be to far forward BUT the oil cooler sits in the middle of the engine bay in the vee and if this promotes air circulation around / near the cooler that will help.

Another option would be to remove the rubber gasket at the firewall that seals the hood when closed. This could allow air to pass over the entire engine bay and exit just in front of the lower part of the windshield where there is already a negative pressure that will help pull the air through the engine bay.

When the hood on my JL was replaced, they left a wider gap between the hood and the cowl. That caused me to ponder if with the wider gap, would removing the rubber firewall to hood seal promote additional venting of heat from under the hood.

 

[ShadowsPapa]

When the hood on my JL was replaced, they left a wider gap between the hood and the cowl. That caused me to ponder if with the wider gap, would removing the rubber firewall to hood seal promote additional venting of heat from under the hood.

You really don't care about heat under the hood. You need all the air you can muster going through the radiator.
If such a gap helped air flow through the radiator.......... ok. Otherwise, naw.
In the end, unless your JT suffers when towing, it's not going to matter to a daily driver - they run good temperatures already.

 

[JarHeadLV]

The Wrangler forum is debating the new grill also - APPARENTLY we are ALL assholes.....according to some douchebag named Ratbert on the Wrangler forums. I see everyone HERE 95% of the time getting along and having adult conversations, agreements and disagreements, but cordial.

Fuck those a holes who think we are like foreigners for having the BEST JEEP!!!!!

 

[ToJTornottoJT]

Has anyone just removed the entire plastic grill and see what happens?

I am over here in Arizona and it has been like 110 for the last 30-45 days... I am thinking about covering my house with the new grills and sitting back and enjoying the temperature difference. J/K of course.

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