Would the 392 hood help the ecoD?

[A 2]

Saw a review on the wrangler 392. Seems like the hood scoop is functional. Any idea if this hood would help the diesel cooling and capacity numbers?

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[WXman]

I doubt it.

Needs the intercooler moved away from the radiator like on the Ram.

 

[A 2]

I doubt it.

Needs the intercooler moved away from the radiator like on the Ram.

That makes sense.

 

[CrazyCooter]

Has there even been a single report of a JT Eco-D overheating yet? Why are we trying to fix a problem that doesn't exist?

I assume there will be no overheating unless someone gets greedy with some aftermarket tuning?

I fully intend to load mine right up to GCVWR or maybe even slightly over once my RV gets here. Will not be traveling when it's over 100° though.......

 

[CerOf]

No one has overheated that I’m aware of.

the JT’s tow rating is neutered due to cooling capacity limitations. Hence the idea of using the 392 hood

 

[A 2]

No one has overheated that I’m aware of.

the JT’s tow rating is neutered due to cooling capacity limitations. Hence the idea of using the 392 hood

correct, that was my thought process. Or at least counteract the negative affects of larger tires and added weight from all the accessories I’m going to sink into it.

 

[A 2]

Has there even been a single report of a JT Eco-D overheating yet? Why are we trying to fix a problem that doesn't exist?

I assume there will be no overheating unless someone gets greedy with some aftermarket tuning?

I fully intend to load mine right up to GCVWR or maybe even slightly over once my RV gets here. Will not be traveling when it's over 100° though.......

Our local deserts here often sees 115 degrees.

 

[CrazyCooter]

Our local deserts here often sees 115 degrees.

Yep, regularly over 100° here too and into high teens. We also have 9%+ grades, so I'm confident we will find a problem if it exists.

Assuming the SAE tow test was the limiting factor of the JT Eco's towing limit and slightly neutered engine tune, I bet FCA found the safe limit before sending them out the door.

 

[MrZappo]

Why do people think that they can improve cooling by doing such simple thing ? Do you really think that an engineering team with millions in funding would overlook the fastest and easiest way to possibly improve cooling ?

Honestly, you coule possibly make cooling worse by changing the airflow in the engine compartment.

A scoop that is not routed to a specific place will just dump air wherebit isnt necessarily needed. It will change the pressure under the hood likely in unpredictable and unaccounted for ways.

If you want to make an engine cool better, you need an engineered solution.

But my bet is that they have it pretty well optimized already.

 

[WXman]

Why do people think that they can improve cooling by doing such simple thing ? Do you really think that an engineering team with millions in funding would overlook the fastest and easiest way to possibly improve cooling ?

Honestly, you coule possibly make cooling worse by changing the airflow in the engine compartment.

A scoop that is not routed to a specific place will just dump air wherebit isnt necessarily needed. It will change the pressure under the hood likely in unpredictable and unaccounted for ways.

If you want to make an engine cool better, you need an engineered solution.

But my bet is that they have it pretty well optimized already.

Because engineering is constrained more heavily than you or I. They've got to build the Jeep to meet water fording targets, towing targets, MPG targets, safety targets, and a whole lot more. Their hands are tied to making the best compromise they can.

However, the end user might have specific needs, and un-doing one or more of those factory compromises can easily attain the desired results.

A very simple example is the air intake kits guys buy all the time. They're dyno proven to increase power, but they aren't installed at the factory. Why? Because of engineering constraints. They've got to meet NVH targets and so it becomes a balance.

 

[danielspivey]

Because engineering is constrained more heavily than you or I. They've got to build the Jeep to meet water fording targets, towing targets, MPG targets, safety targets, and a whole lot more. Their hands are tied to making the best compromise they can.

However, the end user might have specific needs, and un-doing one or more of those factory compromises can easily attain the desired results.

A very simple example is the air intake kits guys buy all the time. They're dyno proven to increase power, but they aren't installed at the factory. Why? Because of engineering constraints. They've got to meet NVH targets and so it becomes a balance.

i thought it’s been debunked many times that air intakes don’t really do much, especially by themselves which not measurable....? I heard it’s more a placebo affect with the change in sound, especially w modern tuned vehicles. Or is there some more data out there?

 

[FutureOdin]

I probably wouldn't use air intakes as an example--Mopar makes their own performance CAI, so clearly they know that it's more beneficial than stock, otherwise they wouldn't sell it? Air intakes is probably more of a cost thing than engineering trade-off.

 

[MrZappo]

Because engineering is constrained more heavily than you or I. They've got to build the Jeep to meet water fording targets, towing targets, MPG targets, safety targets, and a whole lot more. Their hands are tied to making the best compromise they can.

However, the end user might have specific needs, and un-doing one or more of those factory compromises can easily attain the desired results.

A very simple example is the air intake kits guys buy all the time. They're dyno proven to increase power, but they aren't installed at the factory. Why? Because of engineering constraints. They've got to meet NVH targets and so it becomes a balance.

Yeah, this all makes logical sense but towing capacity and overheating are 2 of their PRIMARY goals. You can give up a lot of other things and if you cant tow much or if you overheat, its game over and you are going to have a lot of unhappy people and bad press/reputation.

I'm quite sure that they did all they could given the engine compartment size (within reason and cost constraints) to move the tow rating up as high as they could given that it is a diesel after all and one of the primary reasons people buy diesels is for their towing capacity ..

If they really wanted to increase towing capacity, they would need to do something like move the intercooler (as previously stated), but, I assume that they already thought of that and put it in the best place given the constraints you spoke of ...

And there may someday be some "engineered" aftermarket product that indeed does increase towing capacity just like the many "engineered" solutions out there to increase horsepower (air intake does not seem to be one of them though).

My main point was that simply adding a hood scoop (which hoods already exist for) is likely not one of them because if it worked, they would have been downright stupid to not do it because it is a cheap change. If it made a difference, it would be there ...

I have a Mojave with a non functional scoop and I always scratch my head when people take a dremel to their new hood to make the hood scoop "functional". Huh ? What on earth do you think you are doing ? Honestly if anyone thinks that makes a difference they are more optimistic than I ...

Of course I could be wrong. But, I am an engineer and have experience (albeit in other areas). But it seems like people looking for gains that just are not there ...

 

[Tguerrero]

I pull a trailer regularly and it has never overheated.

 

[CrazyCooter]

Has there even been a single report of a JT Eco-D overheating yet? Why are we trying to fix a problem that doesn't exist?

I assume there will be no overheating unless someone gets greedy with some aftermarket tuning?

I fully intend to load mine right up to GCVWR or maybe even slightly over once my RV gets here. Will not be traveling when it's over 100° though.......

I can now eat my words......... I derated and then overheated at 8000lb GCVR heading out of Death Valley last week.

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