Bonnet vents

[V-TEC ABUSER]

Basically i want to know is it a sin to have functional bonnet vents.

my car gets used on track and the engine compartment gets rather hot with the turbo set-up, and yes its heat wrapped.
just wondering what you guys think.
wouldnt be evo, pulsar, F50 or anything like that, maybe focus rs or gtr r35 vents???
Would this work???

 

[Sid-ek9]

If it's for function then no, they're not a sin.

As for which ones to go for...think it depends on how much you need to cool the bay down by

 

[haitch]

Definately worth doing if it needs it, a guy over on CTRO has recently done it himself, had the opening properly sanded, trimmed, painted etc, meshed it, it looks oem but clearly isnt, for his Jackson kit, it was a spare bonnet that he only uses on track, just swaps it for the day. Who cares what others think

 

[elchunk]

go for it! If you dont want to drive around the roads with a scoop, get yourself a spare bonnet and swap them out for the track days!

 

[Coxy777]

Functional is fine. When people stick a random vent on that is in the wrong place or doesn't do anything that is retarded.

 

[paul_os]

if its for function on the track then of course its not a sin mate and it will look well if done right

 

[BL!TZ]

Best type would be rear-ward facing so hot air is pulled out.

 

[V-TEC ABUSER]

Best type would be rear-ward facing so hot air is pulled out.

yeah i was thinking along those lines myself, something like the focus rs vents, im sure there backward facing. any other ideas???
i was thinking of maybe some slots across the front of the bonnet then vents towards the back so the air goes in and over the engine.

 

[stevenEK9]

just tilt the bonnet

mate has done this on his turbo EK9 and works a treat without looking daft

only thing that would put me off a vented bonnet is getting electrics etc soaking in the wet

 

[dave benson]

just tilt the bonnet

mate has done this on his turbo EK9 and works a treat without looking daft

only thing that would put me off a vented bonnet is getting electrics etc soaking in the wet

and it will dry your hair quickly if you have an accident as the flames go staight into the screen or worse your face !

http://www.cbsonline.co.uk/product/Aluminium_Mesh_Vent_200mm_x_120mm_ALIVNT1

 

[kieran_ej9]

coudnt you just do air intakes at the wheel arches if your nat wanting it to look daft, saying that im not an expert on cooling so what i said might be rubbish

 

[stevenEK9]

way i see it is.........

if you have issues with oil temps, fit an oil cooler, if you have a cooler and still have issues, fit a bigger oil cooler

if you have issues with water temps, fit a bigger radiator if you have space, if not then fit a lower temp thermostat and fan switch

can't see you having intake temp problems with that intercooler of yours!!!

 

[Murray]

Function over form really.
Im in the same boat as yourself, turbo engine bays get real hot when everything is crammed in there.
I have a half size alloy rad due to space and a 13 row oil cooler. It works just fine for a good few hot laps then il let it cool. The last time out on track as soon as the water temp reached 90 degrees i backed off, before the fan kicked in.
I have the bonnet raised at the back, it helps a little bit when on the move, but as soon as the car is switched off the temps come down quicker as there is a gap for the hot air to escape.
Think thats a problem with turbo hondas, there not really designed to have a intercooler sitting at the front, blocking the only hole for air to come through

 

[V-TEC ABUSER]

way i see it is.........

if you have issues with oil temps, fit an oil cooler, if you have a cooler and still have issues, fit a bigger oil cooler

if you have issues with water temps, fit a bigger radiator if you have space, if not then fit a lower temp thermostat and fan switch

can't see you having intake temp problems with that intercooler of yours!!!

I know what your saying steve. Only problem is ive got a 19 row oil cooler and a 53mm core half width radiator. There fine but the temp under the bonnet is blistering at times, fast road and track. If i can shift the heat quicker would be great. I'll try lifting the bonnet at the back, then bonnet vents i guess!!!

 

[fez]

Get some louvres, they look good and dont see it that much on cars these days