Would a cut to the middle cowl help with temps?

[scooter123]

If you are concerned about Engine Heat the the only real solution is to increase the cooling capacity of the Cooling System. On a temporary fix this can be done by turning the Interior Heating System to FULL HOT with the fans at the highest setting. That can sometimes allow you to limp home a car that has overheated due to sitting in traffic. However the ONLY permanent long term solution is an Engine Radiator with more Capacity, ie. a BIGGER Radiator. In addition a small improvement can be gained by increasing the air flow thru the Radiator by adding some exhaust vents for underhood air but that will only provide a small gain. Another potential gain would be by replacing the bumper bar with a tubular assembly and cutting out all the blocked openings in the lower grill area. BTW, increasing the grill opening count will impact high speed aerodynamics and possibly the stability at speeds over 100 mph.

 

[PunkST]

^ that still wont affect the deadzone of hot air stuck behind the engine, and between it and the firewall Which from what i understand of the thread the op is trying to mitigate. Increasing the efficiency of the cooling system isnt going to reduce temps of hot exhaust parts.
Solutions there are ceramic coating exhaust parts and either a turbo blanket or channeling air down the firewall in some way.

 

[PunkST]

Are you using heat wrap or heat tape on your cross over pipe? Reason I ask is if you're using Heat Wrap like the DEI Lava Rock stuff you're not doing yourself any favors. If anything you're adding to the heat soak.

For real. Get the gold tape, its pricey but it reflects heat instead of retaining.

 

[AZSP33D]

Not sure how you have it set up but make sure you retain the stock turbo heatshield if you can, or get a new one if it's mangled, it's surprisingly effective and a lot of people remove it. The downpipe heatshield is also often removed, so some additional insulation is needed like a heat blanket or a wrap, and it's possibly not as effective.

 

[shouldbeasy]

Honestly you are better off cutting the hood for a proper naca duct. And then making the required shroud underneath to blast air down the back side of the engine. Take advantage of the air thats moving over the car.

Well, best case would be to catch the air from the underside of the car and have it exit the hood.

You don't want to stuff air into the engine bay unless it's going specifically to a cooler - that air has to go somewhere and under the car creates lift.

 

[theblue]

any entrances to the engine bay from the back top will create lift. you want to seal this area. when you're moving at speed the heat should go under the car to exit or not allowed into the engine bay at all. your cooling system should do the cooling.

 

[shouldbeasy]

any entrances to the engine bay from the back top will create lift. you want to seal this area. when you're moving at speed the heat should go under the car to exit or not allowed into the engine bay at all. your cooling system should do the cooling.

You don't want to stuff air under the car, you want to remove it from under the car.

 

[PunkST]

Thats why you properly duct the air down to where it dumps near the turbo. Having a useless hole with no ducting isnt gonna do shit. And there isnt enough of a pressure zone under the car thanks to the rubber flap under the bumper. It doesnt need to be a huge duct either. Im bett i g you could get the desired effect with a relatively small inlet and hose. You have three choices of higher pressure zone to grab cool air from. Either front fenderwell ( will have to have a good screen for rocks and muck) or the hood area near the cowl.

 

[PunkST]

The exhaust tunnel would be the escape point. Just like it naturally is. These cars have a pretty decently flat bottom apart from the tunnel.

 

[PunkST]

I may try with some drainage hose i habe laying about and some zip ties to the bottom of the frame horn just as a proof of concept of pulling air from the grille area. Ideally id want the path to be as short as possible ( hence the wheel well thought)

 

[TyphoonFiST]

I may try with some drainage hose i habe laying about and some zip ties to the bottom of the frame horn just as a proof of concept of pulling air from the grille area. Ideally id want the path to be as short as possible ( hence the wheel well thought)

It's called the dead cat hole* seriously check It out...

https://www.urbandictionary.com/define.php?term=dead cat hole

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[PunkST]

Lmao thats bad, funny, but bad.

 

[theblue]

You don't want to stuff air under the car, you want to remove it from under the car.

if you create a cowl induction area once you're at speed air will come off the windshield and into the engine bay. you're not creating a an exit, you're making an entrance.

 

[DoomsdayMelody]

^ that still wont affect the deadzone of hot air stuck behind the engine, and between it and the firewall Which from what i understand of the thread the op is trying to mitigate. Increasing the efficiency of the cooling system isnt going to reduce temps of hot exhaust parts.
Solutions there are ceramic coating exhaust parts and either a turbo blanket or channeling air down the firewall in some way.

Isn’t the KP39 water cooled? Meaning that if you can keep temps down in coolant then you should, in theory, absorb more heat from the turbo which would impact the ambient heat by the firewall?


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[TyphoonFiST]

Pretty much every turbo today is water-cooled to prevent Coking and convenience of not having to deal with a Turbo timer.

 

[PunkST]

Isn’t the KP39 water cooled? Meaning that if you can keep temps down in coolant then you should, in theory, absorb more heat from the turbo which would impact the ambient heat by the firewall?


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it only cools the center cartridge. You still have the manifold, exhaust housing, and downpipe/cat pipe blasting out heat. And if youve pulled off any of the heat shielding, or have been tracking the car, its really hot. Some folks have melted the factory plastic crossover pipe and thats a good foot above the turbo on the back side of the engine.