Why? Rear Edge Of R32 Bonnet Looks "raised"

[bubba]

10mm spacers made from flatbar and some longer bolts.. I did it so my bonnet would close

[SEX-DR.]

I cant believe this thread is still goin... (ill continue it too)

It is proven that by raising the bonnet (as mentioned previously) it removes hot air from under the bonnet,

I had this simple modification prior to me getting my vented bonnet, and every single time the outside temps dropped, or it

was raining, my windscreen would fog up - from the outside (so it wasnt me nor the passangers foggin it up from the inside).

that was the only draw back to it!!!

p.s - otherwise i like the look

Peter

[sl33py]

I cant believe this thread is still goin

lol neither can I, for the innocuous lil Q I asked I think to really find out about the temps etc you'd have to do a lot of controlled tests, maybe something like Autospeed do (from time to time, even some of their tests are a bit sus).

[nisskid]

it doesn't work like that. air moves from high pressure to low pressure, it doesn't just head to the back of the car because that would be convenient.

if you raise the rear of the bonnet you are letting air in not out. have a good look there, almost all cars use bottom of the windscreen for the inlet for cabin air.

but wouldnt raising the bonnet direct air upwards and over the outlet creating a area of low pressure just where the outlet is?

also i would imagine there would be some pressure build up from air movement into the engine bay from the front with no outlet at the rear, at least enough to allow air to escape from an outlet at the rear.

also these things are illegal, just like a any vented bonnet that faces backwards as it is risk of oil or any other fluids coming out and over the windscreen.

[Duncan]

ok....I'll happily agree that when the car is not moving, raised rear of the bonnet will help hot air out.

But if your car is running hot when it is not moving you have much bigger problems.

As soon as the car gets going raised rear does not let air out. did anyone read what cpt_impossible posted above?

But I really don't see the point in arguing with drifters about what looks good so I'll just stfu from here.

[rev210]

The spacers work as a general concept. Lower speeds for race cars are usually not pleasant for them heat wise so they like to be rid of the extra heat soak even more so than a road car.

You can simply remove the weather strip on an R32 GTR. Interestingly I noticed that my intake temps dropped by a few degrees by doing this at speed. Someone with an R32 can re-test this.

I've been doing this to cars for some time now and I think we can at least agree that low speed heat soak is reduced and thats a good thing as long as high speed cooling is not adversly effected.

[nisskid]

ok....I'll happily agree that when the car is not moving, raised rear of the bonnet will help hot air out.

But if your car is running hot when it is not moving you have much bigger problems.

As soon as the car gets going raised rear does not let air out. did anyone read what cpt_impossible posted above?

But I really don't see the point in arguing with drifters about what looks good so I'll just stfu from here.

i think the bigger issue is, for the minor benefits u get, is it worth having just another, and very obvious thing officers can defect u for? personally i dont, and its not legal on the track anyway (well under CAMS at least, not sure about others) so its pretty useless.