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paul91085
06-02-09, 09:51 PM
My GSI is fitted with twin carbs and i am looking into getting a bonnet with a bonnet scoop fitted to help get more air to the carbs.

If do, how much difference will it make?

and will there be problems from water getting to the carbs when the car is standing or going along?

Paul
mowgli
06-02-09, 10:05 PM
well, with a decent filter & airbox ie the nova sport type, the air will route from the rh inner arch. any scoop on the top of the bonnet will only suck water in if you go fast thru a flood
Jack
06-02-09, 11:03 PM
If a bonnet scoop on TOP of the bonnet is sucking water in through a flood, I think you're in trouble for other reasons, i.e. you're trying to drive across a lake lol

I have a vent on my bonnet, right over the turbo and next to the filter, and have no problems with water ingress.
Sloth
06-02-09, 11:06 PM
yeh but thats toyota, they design stuff okish, unlike vaux.....
andymac
07-02-09, 12:45 AM
i wouldnt to be honest i had one on my nova (subaru vent) and the spray from the car in front made the car draw in a lot of water and misfire badly. lucky not to bend a valve!! its not really worth it either unless your engine is highly modifed and needs to draw in a lot of air. or unless you just want to look cool with it lol
mowgli
07-02-09, 12:54 AM
if the scoop faced backwards, it would draw dry air in.
andymac
07-02-09, 01:18 AM
if the scoop faced backwards, it would draw dry air in.

good point but it would have a resistance to get over the scoop before drawing in to the inlet so would not be up to much use at end of day only cars that are fairly tuned should have one for an perpose(sp) not for show!:thumb:
Sloth
07-02-09, 01:31 AM
err id google cowl induction matey
NovaBoyUK
07-02-09, 01:59 AM
[quote=Razorjack]If a bonnet scoop on TOP of the bonnet is sucking water in through a flood, I think you're in trouble for other reasons, i.e. you're trying to drive across a lake lol



hahahahaha!
Paul
07-02-09, 09:16 AM
yeh but thats toyota, they design stuff okish, unlike vaux.....

Vaux didnt design twin carb's webber or dellorto did ;)
Sloth
07-02-09, 01:05 PM
i meant vents not carbs.
Paul
07-02-09, 03:13 PM
AFAIK Vaux have never designed a scoop either, maybe a vent?
chimp007_uk
07-02-09, 03:23 PM
Its fairly modified... 2.1 8v with mahle pistons, lightened and balanced, Piper cam and vernier and weber 45's. Just looking to get cooler air to the carbs, not for show... Just for go... lol
Bubba
07-02-09, 04:25 PM
put some GTE vent on backwards..so they draw air in and with the plastic they have it would push it at a 90 degree angle towards the carbs
Sloth
07-02-09, 04:26 PM
i have bike fairing ones in mine for the 45's worked mint.
chimp007_uk
07-02-09, 04:33 PM
i have bike fairing ones in mine for the 45's worked mint.

pics please :)
Sloth
07-02-09, 05:53 PM
here ya go, the phones a k800i for sizing. i'm not sure what bike there from, i think vfr800....
http://i405.photobucket.com/albums/pp138/sloth_mk1_cav/100D0268.jpg
http://i405.photobucket.com/albums/pp138/sloth_mk1_cav/100D0269.jpg
http://i405.photobucket.com/albums/pp138/sloth_mk1_cav/100D0270.jpg
http://i405.photobucket.com/albums/pp138/sloth_mk1_cav/100D0271.jpg
chimp007_uk
07-02-09, 05:57 PM
Have you fitted one yet? I can't see any differnt between that and a scoop as far as water goes
chimp007_uk
07-02-09, 05:59 PM
this is the one he's thinking about...

http://i40.photobucket.com/albums/e229/chimp007_uk/ae54_1-1.jpg
Sloth
07-02-09, 06:23 PM
i had them fitted and i got no water through them. that pic ya posted looks like a mini scoob vent.. there not massively brill...
chimp007_uk
07-02-09, 07:33 PM
mini scoob vent.. there not massively brill...

Is that water wise?
Sloth
07-02-09, 08:04 PM
yeah they act like a drain lol, and the air flow in isnt great either
mowgli
07-02-09, 08:13 PM
i have a feeling the old skool isuzu 4x4 bonnet scoop could make a comeback.....


http://i12.photobucket.com/albums/a220/NOVAMARTIN16V/DSC02741.jpg
chimp007_uk
07-02-09, 08:17 PM
he was offered that bonnet for a good price in red which is the same colour as his car... Thats why that was the vent in question.

I'm going to vent a bonnet once i fit my bike carbs, but not sure which vent yet :)
Sloth
07-02-09, 08:35 PM
mowgli, whos is that? its amazin! pure 1997!!
chimp007_uk
07-02-09, 08:41 PM
I think... Its' Martin Kelson's.
Jack
08-02-09, 09:34 PM
if the scoop faced backwards, it would draw dry air in.
A scoop facing backwards would draw warm air out. You're thinking of a vent facing backwards, and even then it would depend where on the bonnet it was.

AFAIK Vaux have never designed a scoop either, maybe a vent?
Monterey? Although I suppose that wasn't designed by Vauxhall - mind you, they haven't designed any cars for about 35 years