ady8077
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| posted on 11/7/05 at 03:41 PM |
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air box hose
Hi all
I'm planning on making an airbox and ducting air to it from infront of the radiator, i've been offered some 2.5" hose to use for the
ducting, will this be big enough for a 2.0 pinto with twin 45's?
Adrian
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DarrenW
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| posted on 11/7/05 at 03:44 PM |
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It sounds big enough. Should be ok with a funnel at the start etc. Will it get you some more power? Any sketches to show what you are thinking of?
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rusty nuts
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| posted on 11/7/05 at 05:32 PM |
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I would have thought that 2.5 in dia pipe would be restrictive when used with twin 45s, also the longer the pipe the more restictive it's likely
to be. Just my opinion though. If the car is up and running try fitting the pipe temporarily and road testing to see results?
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ady8077
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| posted on 11/7/05 at 07:29 PM |
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Hi Guys
Hose only needs to be about 2' long, it will have a cone filter at the front
Not really trying to gain power, but the car does feel sluggish when hot
I'm hoping to get the air box vac formed, and will fit over the trumpets like a panel filter
Adrian
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Northy
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| posted on 11/7/05 at 07:39 PM |
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Adrian,
I have been thinking of doing exactly the same. Any chance of getting more than one made?
Cheers
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing! 
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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omega 24 v6
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| posted on 11/7/05 at 07:40 PM |
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Not really sure its big enough and here's my line of thinking why not (roughly)
Area of 2.5 inch pipe is 4.9inch sqaure
Area of 4 weber venturis say 1 1/4 dia is also 4.9 inch square.
So its pretty evenly balanced not taking into account any possible ram air effect of forward motion.
I would look for a 4 inch reinforced tubing from the likes of an eberspacher space heater if I was you.
Your idea is sound though as cold air will give you more power than hot air ( something to do with density )
[Edited on 11/7/05 by omega 24 v6]
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Stu16v
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| posted on 11/7/05 at 09:11 PM |
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quote:
Originally posted by omega 24 v6
Not really sure its big enough and here's my line of thinking why not (roughly)
Area of 2.5 inch pipe is 4.9inch sqaure
Area of 4 weber venturis say 1 1/4 dia is also 4.9 inch square.
So its pretty evenly balanced not taking into account any possible ram air effect of forward motion.
I would look for a 4 inch reinforced tubing from the likes of an eberspacher space heater if I was you.
Your idea is sound though as cold air will give you more power than hot air ( something to do with density )
[Edited on 11/7/05 by omega 24 v6]
Food for thought/Devils advocate...
Even though the airbox may be covering 4 Weber trumpets, they will all be taking turns to have a gulp of air, the carbs do not all 'suck'
at the same time!
Argueably, the inlet pipe would only have to be the same, or slightly bigger than one carb intake!
Dont just build it.....make it!
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ady8077
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| posted on 11/7/05 at 09:14 PM |
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Hi Graham
I'm hoping to get one made as a favour, but if it works i should be able to get more done cheaply
Omega 24 v6
I did think about the area of the webers, but they dont all suck together, i've also looked at my tin top, a 1.8 vectra, the hose from the air
filter is about 2.25" ID.
The max hose i can fit into the air filter is 3.5", so that may be the best bet ?
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omega 24 v6
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| posted on 11/7/05 at 10:16 PM |
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good point stu16v never thought of it that way.
Thats why this group is so good everyone's got their own ideas about things
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