Mojave Hood scoop

[Dick]

Fellas, looking for some input here, I opened up the hood scoop on a '23 Mojave, wanting some extra engine compartment ventilation, now above 35 mph, I have a wind howl in the firewall/ glovebox area. I figured the fender vents would be enough to vent the extra air, it almost seems like the engine compartment is pressurizing for lack of a better term. I figure my options are try and vent more air out at the cowl or corners, or try and redirect the air coming in from the scoop. Reverting back to stock would be my last option. Any ideas would be welcome.

Sponsored

 

[TestMule]

A shallow angle deflector, placed right at the back of the scoop, should decrease the howl and buffeting, directing the flow downwards.

I'd try some light gauge sheet metal, cut to fit either the back of the scoop or the underside of the hood, bend the back portion downwards and use some light adhesive for a test. You can figure out a more permanent method to attach them to the underside of the scoop or the hood if you like the results.

 

[LouisvEarlleJT]

A functional hood scoop is meant to draw air into the air intake.

Having it open and not routed anywhere is not going to net you anything other than noise and (like you said) pressure.

 

[Dick]

A functional hood scoop is meant to draw air into the air intake.

Having it open and not routed anywhere is not going to net you anything other than noise and (like you said) pressure.

I didn't intend it to be a ram air intake, and I really didn't expect it to bring in that much more air, but I figured a nice stream of ambient air in, flowing across the top of the engine and hot engine compartment air out the vents would be nice. That and I'm bored and can't leave it alone.

 

[Pic18]

I’m not trying to be a wise guy but I’d suggest using your last option.

 

[Dick]

Test Mule, I may try that, I saw another thread where guys were mounting lights behind the opened up scoop, I'll have to see how they mounted them, as that may work for a deflector. The engine compartment is sealed off from the cowl, but there's a piece of weather strip at the back of the hood that would let a little more air out, if removed. Cowl corner vents facing rearward would let a lot of air out.

 

[LouisvEarlleJT]

I didn't intend it to be a ram air intake, and I really didn't expect it to bring in that much more air, but I figured a nice stream of ambient air in, flowing across the top of the engine and hot engine compartment air out the vents would be nice. That and I'm bored and can't leave it alone.

Yeah, unfortunately that's just not what you get when you open a hole in that position on the hood. Closing it up is probably going to be your cleanest and best option. If you're worried about temps then look into installing the 850W fan

 

[Dick]

I’m not trying to be a wise guy but I’d suggest using your last option.

Your advice, although sound, is a little too white bread for Mojave Dick.

 

[Lunentucker]

Your advice, although sound, is a little too white bread for Mojave Dick.

 

[antwon412]

If it would’ve helped the engine Jeep would’ve had that area open. It is purely cosmetic and now as you’ve seen, are introducing variables in the engine bay that caused unintended consequences.

 

[Dick]

A donut without a hole is a Danish.

 

[Lunentucker]

https://parts.allmoparparts.com/oem-parts/mopar-hood-bezel-68398765ab

 

[Dick]

https://parts.allmoparparts.com/oem-parts/mopar-hood-bezel-68398765ab

Assuming that's the stock danish?

 

[Dick]

I think I'll drive it with the scoop taped shut to make sure that's the problem, if it is, maybe remove the passenger cowl corner and test again.

 

[GrubbyBaja]

I don't have a solution (other than your last one), but air in must equal air out. Since you are allowing more air in, you must be able to remove that same amount of additional air you have introduced. You are now allowing more air in but the design is still limited on the amount of air leaving the engine bay. Most (if not all) engine cooling transpires through the radiator. By providing another path for incoming air (which does not go through the radiator), you do have cooler air going into the engine bay, but since it is now pressurizing the engine bay, you may have inadvertently reduced the flow through the radiator. You have possibly reduced the cooling capability of the system.

Sponsored