Bonnet Venting

[GUN_METAL_GTR32]

just get a few washers and put them in the hinges to lift it up a little i did it with my old car for similar over heating issues cooled down pretty quick after that 1 cm is all the lift it needs but it does look kind of random and i think its illegal (cop pulled me over told me to take the washers out or he would fine me) so give it a thought

[GUN_METAL_GTR32]

just get a few washers and put them in the hinges to lift it up a little i did it with my old car for similar over heating issues cooled down pretty quick after that 1 cm is all the lift it needs but it does look kind of random and i think its illegal (cop pulled me over told me to take the washers out or he would fine me) so give it a thought

[rev210]

A vent near the front of the bonnet for the radiator air would be ideal, that way the rain only falls around the gap between radiator and pulleys.

Spacing the bonnet up at the rear does wonders too. The downside is engine smell when you activate the interior vents. On GTR's you only need to remove the rubber seal at the point where the rear of the bonnet meets the area in front of the windscreen. That works the same way.

[JAGR33]

Here ya go Dan, a pic of the ZTUNE bonnet on a R33GTR...

Main reason I put it on is coz it sees a lot of track time as well as street use...

The most I've seen my car reach is 91degrees on the Power FC controller.... mind you it has 350rwkws...

It used to be carbon, but painting it silver keeps away the unwanted attention....

[No Crust Racing]

Now that is porn... what'd that set you back? PM me if you'd prefer.

Cheers

[JAGR33]

Now that is porn... what'd that set you back? PM me if you'd prefer.

Cheers

PM sent...

[Al]

Jack the car looks awesome with the bonnet painted silver, nice move. :sorcerer:

If i was to put a bonnet on my car, this is my favorite. It has all the vents in the right places; behind the radiator and above the turbo, manifold, etc.

[No Crust Racing]

I think I'm after a single vent in the middle towards the front, something a bit more subtle.

[JAGR33]

I think I'm after a single vent in the middle towards the front, something a bit more subtle.

Then you need something like this..

[No Crust Racing]

Yeah that's not bad =D

Rev mention removing the rubber strip at the back of the engine bay, wonder how much rain that'd let in and what positive effect it would really have.

[Yawn]

What do you guys think about that little triangle vent on the bonnet of r34 gtr's? Im not sure if its a vspec bonnet or wat, but its towards the top right hand corner of the bonnet. Im sure its there for a reason, but the way I look at it, i doubt it could help bring down temperatures much, if at all.

[No Crust Racing]

I thought it was to get air to the turbo housings?

[Yawn]

I thought it was to get air to the turbo housings?

Oh. :S What do you mean get air to the turbo housings? Like to cool the turbos? Stock turbos are gonna be low mount anyway and that vent is factory id say?

[No Crust Racing]

Yeah that's what I was thinking, coz it sits around there and I know what u'r saying but can't think of another reason to be there. push hot air down and under car?

[Al]

Yeah that's what I was thinking, coz it sits around there and I know what u'r saying but can't think of another reason to be there. push hot air down and under car?

It's to allow hot air out, that's why it is positioned above the turbos; that's also why i like the bonnet i posted.

Hot air rises

[No Crust Racing]

The vent shape and oncoming air seems more like an intake to me? Look at the shape of the vent.

[Al]

Oh that's the one at the front, that's for the air box.

[No Crust Racing]

Ahh, makes sense

[Angus Smart]

any way you go with venting is going to have a positive effect on cooling.

your now just worried about rain? most of the engine is waterproof. or should be so there isnt that much of a problem. and while its running thisgs are pretty hot and water isnt too much of a worry.

p.s. whats rain?

[DJRIFT]

lifting the back of the bonnet is a pretty good idea. a decent bonnet will cost around $1000 and you would be better spending that on a tripple core radiator or a davies crage water pump or more power so lifting the back of the bonnet up is a cheap and afective way for sire. the washers under the hinges is a bit dodgy thoe you would be better off getting a few bits of steal or aluminimum the same size of the hinge and some longer bolts to do it properly.

also removing the rubber strip will help and that alows the bonnet to stay nice and flush. thoe like mentioned before you will get the smell of the engine in the car when turning vents on. but if you have an oil breather like me this wont matter anyway because i can always smell my engine.

on my old r30 race car i simply cut a hole out between the top of the radiator and the cam cover and when the car is sitting there you can see the heat floating out the vent. if it wasnt venting than it would be circulating in the engine ay going no where.

another experiance i have had is when my exhaust temp sensor has been sitting on the turbo housing (before being installed) when the car is running it may get up to 300 deg and after 30 secconds of the engine being switched off the temp is up to 350 to 400 deg.

so basicly it gets very hot and the more you can do to stop it the better.