How's the grease getting out?!

Honda, Audi, Duratec engined variants
jfk
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Joined: Wed Jul 30, 2008 9:50 pm
Location: Dudlaay.

Re: How's the grease getting out?!

Post by jfk » Sat Jul 02, 2016 11:33 pm

Low pressure underneath the car won't feed air anywhere .
It'll help with extraction if there's sufficient higher pressure air to extract

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Muu
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Joined: Mon May 26, 2008 10:38 pm
Location: SW London

Re: How's the grease getting out?!

Post by Muu » Sun Jul 03, 2016 12:51 pm

What about venting the arches, usually done to remove high pressure and lift but would also remove the hot air and create a lower pressure area for air to flow into?

JDS
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Joined: Sun Aug 10, 2008 7:46 pm

Re: How's the grease getting out?!

Post by JDS » Sun Jul 03, 2016 8:47 pm

Low pressure air underneath the car, will go anywhere you direct it, provided that the air pressure is even lower. Pointing the duct/pipe at the centre of the disc, from memory gives the lowest pressure at any point of a spinning wheel. Look at how many manufacturers mount a turning vane to the lower wishbone to direct the air at the brakes.

It does make it a bit of a pain take the undertray off, but side cutters to remove the cable ties and you're done.

jfk
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Joined: Wed Jul 30, 2008 9:50 pm
Location: Dudlaay.

Re: How's the grease getting out?!

Post by jfk » Sun Jul 03, 2016 11:01 pm

Jon, I think you're referring to the small low pressure area in the centre of the disc ?
If so .. Yes there may be a local depression in mb, but the actual volume of air that can flow through the disc vanes is absolutely minute compared to the flow between the undertray and the tarmac.
A bit like the relationship between Volts (potential) and Amps (current)
;-)
All good tho and you're by far the best guy I know on these quirky little cars

jfk
Posts: 3253
Joined: Wed Jul 30, 2008 9:50 pm
Location: Dudlaay.

Re: How's the grease getting out?!

Post by jfk » Sun Jul 03, 2016 11:06 pm

Half of the vanes are the wrong way around anyhow !
Bloomin disc manufacturers cutting casting costs .
I think AP have handed rotors though?

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