Team Cambridge Monaro

[Oldfart]

The old story of Holden bonnet hinges flogging out where the rivets go through and the spring pushes it up, cheap fix is to slot mounting holes a wee bit on the inner guard mount points so it can sit down more, or of course drill out rivets and build up with weld re-drill and re-rivet, bit of a job but probably worth the effort. Great Job John, so love seeing these old girls being Re Born!

In the context of this discussion, it relates to the practice of having the back edge lifted on purpose to help getting the engine bay heat relieved some.

[928]

In the context of this discussion, it relates to the practice of having the back edge lifted on purpose to help getting the engine bay heat relieved some.

That old myth again? do people still think it works?

[Racer Rog]

Myth is correct, wind tunnel tests over the years have well and truly put that one to bed, but there are a lot of non believers out there who will swear on their grandmothers grave that it works and that they have to do that to get the engine temp down, and I have found over the years, that most of those don't understand why the damm thing gets hot in the first place!
Roger

[Oldfart]

Myth is correct, wind tunnel tests over the years have well and truly put that one to bed, but there are a lot of non believers out there who will swear on their grandmothers grave that it works and that they have to do that to get the engine temp down, and I have found over the years, that most of those don't understand why the damm thing gets hot in the first place!
Roger

I don't want to buy into myth or not. Nathans comment which I quoted was a discussion starter about hinges. If anyone wants to quote windtunnels etc, that is fine, however unless the actual vehicle being brought into the topic has been tested the theory is invalid. And yes I have actually spent time with windtunnels. Incredibly small differences can negate previous ideas. Angle of rake of the car itself, windscreens, nose shapes all (and not exclusively) can throw all prior ideas out the window. Generalisations do not apply.

[Rod Grimwood]

That old myth again? do people still think it works?

Don't think, know it works, did it years back. Sorry Rog.

Did it with Anglia (2Ltr) years ago and added a little lip on front of rear gap to assist. it certainly helped with flow of air through engine bay.

PS me and Mr Sprague discussed this on another thread last year with photos.

[Racer Rog]

Its the lip that most likely,did the trick as just raising it by it self often causes a vacuum, and also m,as the old fella said rake, screen angle would make a difference, but rule of thumb it doesn't work, unless youy doing other work in conjunction with it.

Don't think, know it works, did it years back. Sorry Rog.

Did it with Anglia (2Ltr) years ago and added a little lip on front of rear gap to assist. it certainly helped with flow of air through engine bay.

PS me and Mr Sprague discussed this on another thread last year with photos.