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Bonnet Intake ?
Topic Started: Jul 26 2010, 03:44 AM (515 Views)
9,10,levin
Stage 4
I was wondering if it would be possible to get a carbon fibre bonnet made with a scoop which directs the cold air to trumpets with a filter ?

Could you be looking at good gains with this ?

Would this be a big problem when it rains ? :thumbsdown:
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n2o
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mechanical n00b
read up on the stickies, plenty of info already discussed about trumpets
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9,10,levin
Stage 4
I am not asking about the trumpets

The thread is called "Bonnet intake"

which i refer to as i am talking about a direct cold air feed from bonnet to trumpets
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DreadAngel
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Han Lue
Your first issue is the orientation of the trumpets, they're facing towards the firewall. So unless you're literally going to make a cut of your bonnet, then a chute down to your trumpets.

Do able I guess but wouldn't like to be your engine when rain comes nor you when police ask you to pop your bonnet.
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Deleted User
Deleted User

I've fitted a Suzuki Grand Vitara bonnet vent in my car and I run my throttle bodies open but with an ITG filter. Very happy with it. Look at my build thread for photos or my thread about bonnet vents in the 'external' section of the forum.

No issues with rain and them getting wet
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9,10,levin
Stage 4
Yh Escy
that is what i am talking about did u feel any good power gains by having the cold air from the bonnet ?

And to be honest i am really lucky with cops i have been pulled a few times and i have still never been asked to pop the bonnet

so fingers crossed since i always seem to stumble across the RBT lol
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Deleted User
Deleted User

To be honest, any differences are marginal, that said, most modifications on a 1.6 na engine are. They sound amazing and the car feels more meaty higher up the revs so think my have picked up some torque
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jim20
Stage 2
Mines been like that for years. Sorry its an AE92 but there is a blacktop inside. Your Vitara scoop looks nicer though
Posted Image

Posted Image
Edited by jim20, Jul 29 2010, 01:13 PM.
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jim20
Stage 2
Connects like this
Posted Image
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9,10,levin
Stage 4
Thats nice jim20

Just what i was talking about :)

is the gold thing a heat shield ?

As for the gains i guess i cant be expecting much without changing internals of the engine

Thanks guys



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jim20
Stage 2
Heat reflective gold foil on a fibreglass box.
Edited by jim20, Jul 30 2010, 02:06 AM.
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JASE
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Stage 6
so your scoop is fully open to all elements and foreign bodies, with open funnels , bit risky aint it :idk:
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DreadAngel
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Han Lue
On a race only car (And Japanese owners), filters are deemed an unnecessary restriction so they're not used.
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jim20
Stage 2
For most events I enter I cover the mouth of the funnels with window screen material (mosquito mesh). Not the most attractive thing however. I even use the car for dirt autocross events with the same mesh. Been competing like that for almost 6 years now. Engine compression still about 215psi. I change the oil every couple events though and only use 10W30 synthetic. It is road legal where I live and I generally drive it to events. Got caught in the rain a few times but never had a problem. The box doesnt fully seal on the firewall. These is about a 1 inch gap.
Edited by jim20, Jul 30 2010, 01:26 AM.
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jim20
Stage 2
Posted Image

Dyno of a blacktop in a FWD Starlet we did the other day(not my car). Factory VVT intake cam and pulley with 272 degree exhaust cam, motec ecu with some 50mm ram pipes and Cusco headers. Similar bonnet intake to mine. Needed more time for cam gear adjustment.
Edited by jim20, Aug 3 2010, 02:23 AM.
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