Bonnet Venting

[No Crust Racing]

After having fixed a dry solder joint in my AFM tonight(Most likely from the heat I'm about to talk about) I noted that the engine bay gets damn hot and stays hot for a long time (Series II R33 GTR). With this in mind I'm wondering if anyone has endevoured to vent the bonnet or purchase a vented bonnet with the aim of reducing engine bay temps and hopefully prolong component life. I'm not looking for huge rice vents, just options on something practical.

What are peopls thoughts on this idea, do you run the risk of allowing rain/debris/dust/dirt etc into the engine bay in larger than normal amounts, is there a real temp drop as a result, what have people done if they've pursued this idea (pics would be great too).

Thanks all

[Ronin 09]

someone get me a z-tune louvred bonnet... that would be great

[markimak]

i found my GTR stayed hot according to the coolant gauge for a while. i raised the back of my bonnet when i put it back on. and it stays cooler and cools down quicker...

[rockabilly]

fitted this to mine as i do a few track days, nismo stat and triple rad. superb. 70degs all the time..

bought from japsalon/uk. but you get the idea.

[Ronin 09]

hey rockability - is it fibreglass?

[No Crust Racing]

Ronin: Got pics? Was it hard to do?

Rockabilly: That's a bit more serious than I was thinking but thanks for the pics (looks great by the way). Trying not to attract too much attention from the local PD

[tmc_2]

I had a Carbon fibre vented bonnet and that kep my temps down and also had a inlet over hte air filter. When i went to a standard bonnet i felt the car was not as responsive prob due to no air intake vent. i aslo found on hot days the temp needle ran higher. I have no issues whit dirt or water.

[Dirty32]

Actiondan - i think Ronin meant he wants the bonnet from the z-tune...

Take a look at some pics and you will see what he means... porn bonnet.

[1400r]

cut a hole in my sil's bonnet the other day left the frame work in still

seems to keep the temps just under half way now

probably only works when sitting still but it does seem to work

[No Crust Racing]

Ahh, OK yeah it is hot as =D I'm just looking for some subtle venting to get rid of heat without attracting too much attention or trying to look like a wannabe.

[series2r33]

I was think bout getting a vented bonnet but i was wondering about driving it in the rain, say if u stop at the traffic lights or something where the engine is gonna be hot does the rain running down through the vents directly onto the engine cause steam or anything?

I also know your no ment to directly cool a hot engine incase some cracks goin from hot to cold that quickly

[1400r]

look up the 270R 200sx tuned by nismo

have a look at what they did it would be hard to spot if yor painted the whole lot in the factory colour

the hole I cut is very small and only just behind the radiator shroud and stops just before the rocker cover

hmmm maybe dont have a look lol

just refreshed my memory and its not how I remember it

my advice cut hole in bonnet not frame no one likes a floppy bonnet

fill hole with mesh paint mesh black tada

function without the wank

Edited January 12, 2007 by 1400r

[discopotato03]

Is that the one Simon Gisgus (sp ?) did years ago to the S14 200 SX ?

Cheers A .

[No Crust Racing]

I'm having trouble finding a good pic of the bonnet.

[andz]

found some pics for u

Z-tune is by far the sexiest

[No Crust Racing]

Actually that Z-Tune one is looking better and better, bit serious though. What's the consensus on dirt/rain etc?

[sewid]

Well what some people do is place a number of washers where the hinge bolts on effectively lifting up the rear of the bonnet letting air escape out the back. You may also need longer bolts.

You could do this before a track event and then put it back to stock afterwards.

[No Crust Racing]

Mmm. I think that would look a bit wierd personally, someone got some pics?

[sewid]

Mmm. I think that would look a bit wierd personally, someone got some pics?

Yes it looks weird. Heat isnt a problem on the street when you're talking a turbocharged engine of course theyre going to get hot. It's good to keep things cool yes but the engine bay has been designed with a higher temp in mind from the factory.

On the track where you're seeing a great deal higher temps is when you need to worry about it and think about getting temps down or moving air around or keeping heat inside the exhaust etc.

[Angus Smart]

After having fixed a dry solder joint in my AFM tonight(Most likely from the heat I'm about to talk about) I noted that the engine bay gets damn hot and stays hot for a long time (Series II R33 GTR). With this in mind I'm wondering if anyone has endevoured to vent the bonnet or purchase a vented bonnet with the aim of reducing engine bay temps and hopefully prolong component life. I'm not looking for huge rice vents, just options on something practical.

What are peopls thoughts on this idea, do you run the risk of allowing rain/debris/dust/dirt etc into the engine bay in larger than normal amounts, is there a real temp drop as a result, what have people done if they've pursued this idea (pics would be great too).

Thanks all

hey mate, i recently got a z tune vent moulded into my 32gtr bonnet i noticed around 15+ degree drop in engine temp.

and rain gets in. but i dont really notice it bieng dirty or anything. just made sure the seal around my cam covers and coils is in good form!

just adding to the thread after reading the rest of it.. i have been pulled over by police on a number of occasions and nothing ever mentioned about the bonnet, or headlight.. or anything for that matter.

Edited January 12, 2007 by Angus Smart