suggestions please, bonnet vent needed

[Mike@Rentech]

As above, dont want it looking barry and has to go at the front of the bonnet to allow TB's to breath.
I was thinking subaru vent any other suggestions.

P.S. 30 bhp gain to be had with this

 

[Jim NM]

http://www.coollouvres.com/index.shtml

Have a browse on here Mike

 

[Peperami]

Cut a set of large holes in the front of the bonnet, and fix black mesh underneath. Im thinking inch big holes in a row or similar

 

[manicmonkey]

ive thought about a small scoop just by the intake of the inlet manifold, but wouldnt you end up with a load of water in the engine when it rains?

 

[Jim NM]

With regard to bonnet venting you should beware as it can have an adverse effect.
Designers take into account the airflow through the grill etc for optimum required temperatures therfore if you dabble with the air flow you could either result in over cooling which will not bode well for optimum performance.

I do realise that designers can get it wrong however, modern car design technology is much better now than say 15 to 20 years ago when they designed the R5GTT which is litterally a hot hatch in all respects. (One eye on the temp gauge and one on the road) LOL

 

[Peperami]

With regard to bonnet venting you should beware as it can have an adverse effect.
Designers take into account the airflow through the grill etc for optimum required temperatures therfore if you dabble with the air flow you could either result in over cooling which will not bode well for optimum performance.

I do realise that designers can get it wrong however, modern car design technology is much better now than say 15 to 20 years ago when they designed the R5GTT which is litterally a hot hatch in all respects. (One eye on the temp gauge and one on the road) LOL

He has tb's fitted though mate, so the air requirements from the engine are completely different to standard. Keep up!

 

[lusty v-tec]

take your bonnet to a bodyshop and have some custom ones put in.

that way you can get the cool air to the areas of the engine bay that need it the most

 

[Mike@Rentech]

Thanks for the info everyone.
Have decide to have a bash myself, will be cutting holes with black wire mesh behind the bonnet.
Circles per throttle body or long lines, yet to decide.

 

[shaun172mk1]

a inverted scooby vent would be sweet

 

[makavelli]

Cut a set of large holes in the front of the bonnet, and fix black mesh underneath. Im thinking inch big holes in a row or similar

that sounds like the best idea to me

 

[GordonD]

Think about plastic bags getting sucked in.

Think about when it pisses down with rain.

Ram-air seems like a good idea. Until it fills up with water.

 

[john182rs]

Thanks for the info everyone.
Have decide to have a bash myself, will be cutting holes with black wire mesh behind the bonnet.
Circles per throttle body or long lines, yet to decide.

dont just put mesh behind it but some foam behind aswell making it thicker aswell because when it rains it will just go through the mesh an straight in to the TB's but with foam it will help to prevent some of this

 

[Neil G]

Check these guys out Mike...they do mini scoops for Imprezas which I believe have trays beneath to catch rainwater/debris.

www.milsport.co.uk

 

[Jim NM]

bonnet vents will let the heat out and a aquamist system would help to cool tbs