Heat In Engine Compartment ???

I have noticed that the engine compartment on my 2001 360 coupe gets quite hot after a bit of driving. When I am done driving and park the car in the garage I raise my engine hatch and leave it open all night to aid in cooling down. Anybody else do this?
I also noticed something, with the exhaust cannister being so close to the airbox (tubi exhaust), the airbox gets pretty hot! Doesnt that affect performance? I would think all that hot air cant be good (think cold air intakes), unless it is flowing in so fast that it does not have time to heat up?

 

Myles,

I do the same thing with mine, heats the garage up very quickly. A rear challenge grills is next to order.

 

Making the car cool down faster once shut down I do not believe is really all that beneficial, but then it doesnt hurt. It is nowhere near as hot then as it is when running hard and the exhaust temps are very high.

The air inlet on the fender is not that far away from the motor. With the intake air velocity I doubt it has much time to heat the air. It has intake and external air temp sensors. You can watch them real time on the computer and I have done exactly that on several occasions. Coming back from a test drive they pretty much match each other. After the car sits and idles a while you can see the intake air temp climb several degrees.

 

I started lifting the hatch a few months ago when I came back from a canyon drive and touched the back part of the hatch and it nearly burned my hand. I figured what the heck ill open it lets some heat out.

But exactly what you said

"It is nowhere near as hot then as it is when running hard and the exhaust temps are very high."

Makes total sense and is probably not going to affect anything when shut down.

 

Only over the last 12 months or so I started to open the engine cover up on my 348 also.

There is A LOT of heat generated in there. It doesnt hurt to open it up and let the heat out faster.

 

If your water and oil temps are within normal operation temps, then it's okay. I don't believe there is any benefits of leaving your lid open overnight.

As your driving, the engine vacuums the air from outside of the car through the vents. My Porsche Cayenne TTS's stock airbox and engine compartment get pretty hot when I shut her down as well.

 

I always lift hatch to assist cooling. No down side.

 

For me: A rear challenge grills + lifting it up after a run.

 

Thanks for the responses, It does warm up the garage quickly!
I have the rear challenge grill on my car too! Imagine how hot it would get without it!

 

Yes, that's my usual practice as well. Always the lift the hatch to let the hot air out. The challenge grill on the 360 should help. I've got the challenge grill as well for my 430 but doubt that's any different from the factory grill in terms of heat dissipation.

 

Leave your exhaust valves open and you'll reduce considerably the engine bay temperature as exhausts will bypass the muffler and take a direct route to the tips. A remote control unit can easily be installed if you don't want to have them permanentely open.

 

Just got back from "spirited" run and as usual opened the rear compartment.

But before doing so I felt the glass at it's rearmost point where it is just about above the muffler.

It was barely warm.

Maybe I (we) notice all the compartment heat because it's standing still???

Just my 2¢'s worth.

Yours,

Tom

 

some aftermarket muffler are position high and close to the air box... capristo heats up the air box so much it actually melts the rubber seal of the K&N filter, and deform the center brake light.

 

I beleive the biggest benefit of opening the engine cover after driving is that it reduces the amount of heat and the length of time exposed to heat of the paint on the read valence and the rear deck. That amount of heat cannot be good for the paint. I bought some stick on heat shield and installed it on the inside of the rear valence (between the tail lights) to protect the paint.

 

I always thought about installing some "auto shut off" fans on the rear challenge grill. it will be good for the rubber, plastic, wires, bushes, electronics...

 

I have seen a couple where the glass is beginning to delaminate. Once the car stops the air flow stops and the heat level will rise significantly compared to when driving, spider seems like it is more at risk than a coupe due to clearnance issues. It's something to do.

 

Yep, this is the way to go.

 

That's exactly what I told the missus to justify the challenge grill...works like a charm.

Had a big run last night, got back to my garage, lifted the engine cover to let the hot air out... let it sit for 25mins whilst I took a nice cold shower...by the time I got back the engine bay was cool to touch. Best practice IMO.

 

I'm torn by the heat issue, too. My wife and I actually prefer the look of the painted panel vs. the challenge rear grill, but there's no question the latter is more functional. If I ever get to the point where I want one, I'll have some convincing to do re spouse....

 

I service multiple 360's with mileage in excess of 100,000 miles and there is no paint damage.

Sorry but that is just silly.



UV damages paint, not heat under the hood.

 

Agreed. And aren't factory paint jobs baked on at fairly high temps anyway?

 

The Capristo muffler produces less heat than the OEM muffler

Anyone who has the Capristo exhaust can see that steel muffler does not darken, but it remains clear to a slightly golden color for the simple reason that it does not heat up as much as the original.

Here are some photos, after testing on the dyno with the OEM muffler, it was 94.4 ° C while the Capristo’s maximum was 45.2 ° C.

The 360 has problems that the heat being generated by collectors, catalysts, I recommend that you mount a challenge rear grill if you drive the car aggressively or on the track.

We also have the 360 header wrap that is constructed with Aerospace material that sells for $1599.00 USD.
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Thanks Nick for posting this real evidence of temp. mesurements between stock and Capristo exhaust. This is a heat reduction of almost 50% which is huge! The Capristo unique side vents principle are doing a fantastic work. That's what I call real engineering. Very well done!

 

Thanks Stef.

 

The stock muffler is massive heavy and holds a ton of thermal energy. After shutdown the muffler keeps everything hot. The third brake light, in spite of the sliver heat shield takes a beating and so does everything else in the engine bay.

After fitting the much smaller and lighter CS muffler, the car cools off much faster, one half the time and the temperatures are lower at shut down .

I replaced my third brake light as half of the cells were burned out presumably from the excessive heat from the much larger stock muffler. With my CS sport muffler the brake light is fine.