reducing heat in a E32 750 engine room

[shogun]

Q:
Front hood venting?
Message: I was looking at the hood(engine cover) on my spare parts car and was thinking it might be intresting to louver a bit of it and see if it reduced the heat of the 750. Being that German engineering has most of this thought out pretty well, I thought to ask if any one has tried any venting and what the result might be. Lovuers were a hot rod must have of the 50's and one of the local guys still has a press?? Dinan added 3 vents on each side for his Turbo install (intecooler air)and they look good. I think.
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Answers:
The e32 hood doesn't lend itself to Socal custom
Message: Fast & Furious.

Just remove the rear rubber gasket which seals the hood to the forward support for the IHKA blower & windscreen wiper chamber. As you move, suction from the low pressure zone against the windscreen pulls the heat out the back and up/over the top of the car.

It makes a big difference. Also have your exhaust manifolds/down pipes ceramic coated.
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As far as I understand the system and what the German engineers thought of it:
they sealed the system as much as possible, so that no air can escape thru any slots in the hood.
Inside the engine room the air has a kind of pressure from air coming thry the front grill entry, and then the air is pushed to under the car to get out.
If one installs louvers - some are looking very nice, I have seen them on E32 in Germany- the whole system would be not working that good.
Otherwise companies like Alpina or Schnitzer would have installed them too.
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here is a link, they make it

This company is specialized in that.

http://www.fredsfab.com/service_categories.php?id=1

Louvers by Canfield
http://www.frontiernet.net/~dlcanfield/
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"As far as I understand the system and what the German engineers thought of it:
they sealed the system as much as possible, so that no air can escape thru any slots in the hood."

While I agree with you and this might have been a good idea with 6-cylinder engine, my opinion is that with V-engines, there isn't enough air flow through engine bay. When there's more than 50C (120F) in engine bay at constant 50km/h(30mph), there's definetely something wrong when outside temperature is only 20C (68F). Fortunately around here temperatures over 30C (86F) are very rare and winter is long.

Hoses and plastic parts won't survive that for long and as we know, they don't. "What to do" is the question then and frankly, I don't know. I suspect BMW engineers blocked top venting in order to get more (any?) air flow to exhaust manifolds and gearbox, but this is just a guess.

Large scoop on top of hood might help.

(In/out electronic thermometer used for the science part. )

Tuomas
'89 750il 250k (Brand new LAD bombs (Febi) ordered and paid, chistmas time )
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Yes, I'm thinking those engineers were too long on the ganja! Prolly the descendants of the messerschmidt team who came up with the Gigant.

If this system works so well, why are many cars coverting to top mounted venting system. Ford Cobra, M3CSL & ALMS race car, Elise & Exige, and many many others.

The available pull of the airstream over the top of the car is far superior to anything happening underneath. Maybe this thinking is why the B12 5.7 has louver panels in the Carbon hood?

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The idea with removing the rear rubber gasket at the rear of the hood seal(partly) is quite interesting.
Plus: Also have your exhaust manifolds/down pipes ceramic coated.

Maybe for some hot climate areas this might be a good idea.