air intake/cooling vents in the bonnet

[mhj]

im interested in cutting a hole in the bonnet just above the air intake to let more cold air in...thought maybe some black plastic vents off a peugot might be able to be fitted
does anyone have or know where to find pictures of what other people have done
my car is an NB

enjoy

[StanTheMan]

not sure if its really going to make a huge difference.

if you a ere experiencing overheating......make sure all other things are correct first. Is you car turbo? I'd certainly consider a CAI before cutting up a bonnet. But thats just my own Personal choice.

[Juffa]

Get yourself onto the Autospeed website and have a read of their article on this very subject. You will need to work out where your high and low pressure zones are in order to find the best place for a intake or a vent.

As Stan suggested a CAI, using one of the existing types available in Aust is probably the better way to go. Cheaper, stealthy and can reverted to normal with minimal effort.

J

[MX5CHIC]

Check out a previous, and very long discussion on the forum here, lots of info, opinions and links.
I am hoping to opt for a front bumper (fog light) intake up into the air filter, on an NB there is already a hole which allows for such an easy mod and the front bumper is a high pressure area.
I think Okibi has done this on his NB.

[mhj]

nope the car doesnt over heat....got a you beaut big radiator....not that it overheated before that arrived

ive got a jackson racing supercharger( 45)....as such the cai to the firewall inna mania style is not going to happen

the option described by mx5chic is a possability....but i like the driving lights

another option is to move the air intake forward and put a shield around it.... i gather there is an air flow in the front left of the engine bay ....but its still sucking air from under the bonnet!

i had imagined that i could sheild the air intake where it is and add a bonnet vent/scoop above it to suck / swallow lovely fresh ambient air....... is this logic reasonable???

enjoy

[bensale]

If the peugeot vents you are refering to are the 206 gti ones then in the pug they are used for cabin air not for cooling They put them on the road car for the rally car's homologation though...

[mhj]

yep theyre the ones i referenced, but i had imagined they would be avalable second hand and used for my own wicked purposes...ie as the previous post said...above the air box....

[bensale]

Fair enough, the early wrc pugs used them for a similar thing until the rules were changed allowing them to use non road car vents.

Do you want me to take any close up photos of the vent for you? Ie the engine bay side of it. I think its a cool idea, wouldn't do it personally but I can understand why you'd want to.

[mhj]

generous offer bensale...but dont put youslf out mate

the pug vents did catch my eye , but there are other options driving about

at this stage it is a cool idea...but is it a cool(ing) idea!?

i have also taken note of the stealth issue raised by juffa....and another post about the nannies concern about lowering ( mines lowered albeit with engineering certificate that goes with that ) and ...again ...the importance of stealth

and to tell the truth i am also not definite i want irreversable holes in the lovely aluminium...its a thought i wanted to run by the other mx5 tragics( thats us people)

enjoy

[Benny]

Why don't you just jack up the rear of the bonnet a little?

Thsi will give massive extra air-flow to the motor, is easily reversible if done the right way, and not very noticeable either.

You really don't want any turbulent air anywhere near your air intake, as the turbulance can actually lower your horsepower.
This is why race cars with their fresh air intakes outside of the car (like F3 cars) always have large plenum chambers where the air can settle down.

[mhj]

[quote="Benny"]Why don't you just jack up the rear of the bonnet a little

isnt that illegal....and as such inviting the attention of the nasties

re the turbulence...that makes sense to me ....and might well mean death for the idea

enjoy

[bensale]

Not putting myself out, I just went down to the garage & took a couple of quick snaps on my phone for you. Let me know if you want better ones and I'll grab the SLR. As you can see it comes with some plastic on the back to help direct the air before going into the hole at the back left of the engine bay. I looks like they try to diect it around the 'intake' rather than straight to the hole.

[Okibi]

...I think Okibi has done this on his NB.

Yup

Been tempted to try some CF trumpets in the fog light holes.

[mhj]

onya bensale...interesting, i hadnt realised that there was so much underneath
also realised as i saw the pictures that these pug plastics are actually for the "wrong" side of the car

and as for mr okibi

show us ya vents!!!!!!

enjoy

[Tedsmx5]

http://cgi.ebay.com.au/AU-CA20-Car-Auto ... 7C294%3A30

I have one of these to put on my bonnet to feed cool air into the intake, it’s very well made and ready to paint.
Ted