corsasport.co.uk
 

Corsa Sport » Message Board » General Chat » how effective are bonnet louvres?


New Topic

New Poll
  <<  1    2  >> Subscribe | Add to Favourites

You are not logged in and may not post or reply to messages. Please log in or create a new account or mail us about fixing an existing one - register@corsasport.co.uk

There are also many more features available when you are logged in such as private messages, buddy list, location services, post search and more.


Author how effective are bonnet louvres?
Matt H
Member

Registered: 11th Sep 01
Location: South Yorkshire
User status: Offline
11th Mar 04 at 22:03   View User's Profile U2U Member Reply With Quote

as above.

i could do with getting more air under my bonnet to the tb's but i dont want a big ugly vent. do bonnet louvres work well or are they mainly for looks


or if anyone knows of a subtle vent that would suit a gsi and not look ott


any help with this is much appreciated


thanks
vibrio
Banned

Registered: 28th Feb 01
Location: POAH
User status: Offline
11th Mar 04 at 22:14   View User's Profile U2U Member Reply With Quote

let hot air out
Kerry
Member

Registered: 5th Oct 01
Location: Norwich
User status: Offline
11th Mar 04 at 22:15   View User's Profile U2U Member Reply With Quote

how effective is opening a window?
Matt H
Member

Registered: 11th Sep 01
Location: South Yorkshire
User status: Offline
11th Mar 04 at 22:16   View User's Profile U2U Member Reply With Quote

my bonnet doesn't have windows
Drew
Banned

Registered: 24th Nov 01
Location: County Durham
User status: Offline
11th Mar 04 at 22:16   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by vibrio
let hot air out


all depends where the louve is really (and its direction)

if its towards the front of the bonnet - will force more air in
Drew
Banned

Registered: 24th Nov 01
Location: County Durham
User status: Offline
11th Mar 04 at 22:16   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Kerry
how effective is opening a window?


vibrio
Banned

Registered: 28th Feb 01
Location: POAH
User status: Offline
11th Mar 04 at 22:18   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Drew
quote:
Originally posted by vibrio
let hot air out


all depends where the louve is really (and its direction)

if its towards the front of the bonnet - will force more air in



yes this is true. you could have two types.
Kerry
Member

Registered: 5th Oct 01
Location: Norwich
User status: Offline
11th Mar 04 at 22:18   View User's Profile U2U Member Reply With Quote

i was reffering to vibs comment on lettin hot air out
vibrio
Banned

Registered: 28th Feb 01
Location: POAH
User status: Offline
11th Mar 04 at 22:23   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Kerry
i was reffering to vibs comment on lettin hot air out



could just blend your mouth into the bonnet I suppose
Kerry
Member

Registered: 5th Oct 01
Location: Norwich
User status: Offline
11th Mar 04 at 22:24   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by vibrio
quote:
Originally posted by Kerry
i was reffering to vibs comment on lettin hot air out



could just blend your mouth into the bonnet I suppose


then there would be no point in a bonnet as it would be a wide open space
LukeGSi
Member

Registered: 9th Dec 03
User status: Offline
11th Mar 04 at 22:28   View User's Profile U2U Member Reply With Quote

wow helpful comments as usual!! IMO louvres dont really help all that much, more of a cosmetic mod
vibrio
Banned

Registered: 28th Feb 01
Location: POAH
User status: Offline
11th Mar 04 at 22:39   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by born_upsideout
wow helpful comments as usual!! IMO louvres dont really help all that much, more of a cosmetic mod




then your opinion sucks then
LukeGSi
Member

Registered: 9th Dec 03
User status: Offline
11th Mar 04 at 22:39   View User's Profile U2U Member Reply With Quote

blow me!!
LukeGSi
Member

Registered: 9th Dec 03
User status: Offline
11th Mar 04 at 22:40   View User's Profile U2U Member Reply With Quote

and you have contradicted yourself....if its my OPINION how am i wrong
vibrio
Banned

Registered: 28th Feb 01
Location: POAH
User status: Offline
11th Mar 04 at 22:46   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by born_upsideout
and you have contradicted yourself....if its my OPINION how am i wrong


explain how I have contradicted myself. I said they let hot air out which they do.


MattyB
Member

Registered: 13th Nov 01
Location: 118.5bhp :D
User status: Offline
11th Mar 04 at 22:49   View User's Profile U2U Member Reply With Quote

I've just had reversed cool louvres put in above my intercooler..........



I wanted the subtle approach to a functional bonnet vent, and dispite their size, they are extremely effective in letting cold air in, using the reversed method.

They would be useless the otherway round, pulling air out would reduce the amount of air available to your TB's.

Anyway, my car is back from the bodyshop 2moz after havin the bonnet sprayed back up, will post pics then

They are extemely cost effective and look well smart IMO.

Matt

[Edited on 11-03-2004 by MattyB]
LukeGSi
Member

Registered: 9th Dec 03
User status: Offline
11th Mar 04 at 22:51   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by vibrio
then your opinion sucks then


this is a contradiction - if its my opinion then its neither right or wrong (or as your quite cleverly put it "sucks" )
MattyB
Member

Registered: 13th Nov 01
Location: 118.5bhp :D
User status: Offline
11th Mar 04 at 22:53   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by born_upsideout
wow helpful comments as usual!! IMO louvres dont really help all that much, more of a cosmetic mod


depends how they are laid out and on what car.

largest sized reversed louvres pressed over intercooler/TBs etc =

pretty patterns on a NA engine = No effect at all, but look smart!

Matt
vibrio
Banned

Registered: 28th Feb 01
Location: POAH
User status: Offline
11th Mar 04 at 22:58   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by born_upsideout
quote:
Originally posted by vibrio
then your opinion sucks then


this is a contradiction - if its my opinion then its neither right or wrong (or as your quite cleverly put it "sucks" )



no your opinion that the louvres don't work is wrong. your opinon is formed from information which is wrong. louvres are effective and removing heat from the engine bay
vibrio
Banned

Registered: 28th Feb 01
Location: POAH
User status: Offline
11th Mar 04 at 22:59   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by MattyB
quote:
Originally posted by born_upsideout
wow helpful comments as usual!! IMO louvres dont really help all that much, more of a cosmetic mod


depends how they are laid out and on what car.

largest sized reversed louvres pressed over intercooler/TBs etc =

pretty patterns on a NA engine = No effect at all, but look smart!

Matt



hot air rises. holes in the bonnet means the hot air can escape.
sfxer
Member

Registered: 23rd Aug 00
Location: devon, england
User status: Offline
12th Mar 04 at 10:59   View User's Profile U2U Member Reply With Quote

louvres work very nicely,

its plainly obvious that having a few holes in the bonnet as opposed to no holes is going to improve airflow!
Gambit
Member

Registered: 5th Jun 00
Location: Common Sense HQ
User status: Offline
12th Mar 04 at 11:04   View User's Profile U2U Member Reply With Quote

born_upsideout do some reading into things before putting stupid comments - u only make yourself look daft

when the car is moving, the lourves work by the air passing over it creating a small vacuum just behind the top of the louvres this then draws the hot air from the engine bay to fill this vacuum, hence sucking more cold air from the front to replace the hot air that has just been extracted

if they didnt work why do most turbo cars have loveres in the bonnet??

[Edited on 12-03-2004 by Gambit]
MattyB
Member

Registered: 13th Nov 01
Location: 118.5bhp :D
User status: Offline
12th Mar 04 at 11:08   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by vibrio
quote:
Originally posted by MattyB
quote:
Originally posted by born_upsideout
wow helpful comments as usual!! IMO louvres dont really help all that much, more of a cosmetic mod


depends how they are laid out and on what car.

largest sized reversed louvres pressed over intercooler/TBs etc =

pretty patterns on a NA engine = No effect at all, but look smart!

Matt



hot air rises. holes in the bonnet means the hot air can escape.


yep ur right there ............but the reduction in ambient underbonnet temperatures?? I few degrees if anything. The difference made would be sod all, unelss u owned a racing car and were caning it round on a hot day.

Matt
MatthewR
Member

Registered: 21st Oct 02
Location: Rickmansworth
User status: Offline
12th Mar 04 at 11:09   View User's Profile U2U Member Reply With Quote

I think they look better than a vent anyway
MattyB
Member

Registered: 13th Nov 01
Location: 118.5bhp :D
User status: Offline
12th Mar 04 at 11:11   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Gambit
born_upsideout do some reading into things before putting stupid comments - u only make yourself look daft

when the car is moving, the lourves work by the air passing over it creating a small vacuum just behind the top of the louvres this then draws the hot air from the engine bay to fill this vacuum, hence sucking more cold air from the front to replace the hot air that has just been extracted

if they didnt work why do most turbo cars have loveres in the bonnet??

[Edited on 12-03-2004 by Gambit]


turbo cars gain more power via cooler boost temps, which is achieve by scoops/vents above the I/C. slightly cooler ambient under bonnet temps dont make too much of a difference to power.

  <<  1    2  >>
New Topic

New Poll

Corsa Sport » Message Board » General Chat » how effective are bonnet louvres? 22 database queries in 0.0173020 seconds