Cold-air intake for track days
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Cold-air intake for track days
Will have this ready as a unit to drop in [with a different pod filter] at the track after i remove the light assembly there just incase its illegal for the road.
Just need to locate some bolt holes and source some rubber edging as it has sharp edges.
Just need to locate some bolt holes and source some rubber edging as it has sharp edges.
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hmmm I would think that the extra drag from not having the headlight cover there would more than negate any advantages of a cold air intake.
It would be better to get an old headlight cover and fashion a vent into it for use with your trackday intake so you get the best of both worlds.
It would be better to get an old headlight cover and fashion a vent into it for use with your trackday intake so you get the best of both worlds.
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i have 3 things to point out here
1 on a turbo car if your intercooler is sized corectly this will make no differcene at all as the air leaving the turbo is alot hotter than the intake i run my filter directly on the turbo with no effect on performance from when i had it boxed.
2 if you wre to run it like that and it did force air in you could find it may run lean .
3 if your drawing is corect it would be in low presure zone in which case you could starve the turbo of air.
just my thoughts
1 on a turbo car if your intercooler is sized corectly this will make no differcene at all as the air leaving the turbo is alot hotter than the intake i run my filter directly on the turbo with no effect on performance from when i had it boxed.
2 if you wre to run it like that and it did force air in you could find it may run lean .
3 if your drawing is corect it would be in low presure zone in which case you could starve the turbo of air.
just my thoughts
Yeah but you are comparing a smooth surface, where flow can remain fairly laminar, to an abrupt hole where air is smacking a surface perpendicular to its flow getting into all sorts of trouble since there are no easy escape paths for it.
Remember that the influence of drag is squared with speed so a couple of HP increase via the intake is going to be negated at fairly low speeds.
I just think, with a bit more work you can get the best of both worlds
(that's a picture of a FC RX7 too innit?)
Remember that the influence of drag is squared with speed so a couple of HP increase via the intake is going to be negated at fairly low speeds.
I just think, with a bit more work you can get the best of both worlds
(that's a picture of a FC RX7 too innit?)
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Cold air intakes dont really make any noticeable difference to power levels
http://www.youtube.com/watch?v=gCi2yo4UqPI
http://www.youtube.com/watch?v=gCi2yo4UqPI
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Read this...http://auto.howstuffworks.com/why-insta ... intake.htm
I am not after more HP by doing this just after a cooler place to obtain air as my filter is normally mounted behind the top of the radiator and this position is where under hood temps are the highest and probably with slow moving air.
Why do so many people heat shield their filters if obtaining cold air is not relevant?..i for one cant & dont want to put my filter in a heat shield that is still inside a hot engine compartment.
I have done tests on my car which shows it doesnt hiccup occaisionally at motorway speeds by
[1]...removing the passenger headlight cover.
OR
[2]...placing the air filter down by the bottom of the radiator.
Ever noticed that during winter or even when its raining your car seems to run better?
Will take my car to the local wind tunnel today and test the air flow over the head-light covers.
I am not after more HP by doing this just after a cooler place to obtain air as my filter is normally mounted behind the top of the radiator and this position is where under hood temps are the highest and probably with slow moving air.
Why do so many people heat shield their filters if obtaining cold air is not relevant?..i for one cant & dont want to put my filter in a heat shield that is still inside a hot engine compartment.
I have done tests on my car which shows it doesnt hiccup occaisionally at motorway speeds by
[1]...removing the passenger headlight cover.
OR
[2]...placing the air filter down by the bottom of the radiator.
Ever noticed that during winter or even when its raining your car seems to run better?
Will take my car to the local wind tunnel today and test the air flow over the head-light covers.
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1..Was your filter when boxed sucking hot air or was it fed cool external air?2low2c wrote:i have 3 things to point out here
1 on a turbo car if your intercooler is sized corectly this will make no differcene at all as the air leaving the turbo is alot hotter than the intake i run my filter directly on the turbo with no effect on performance from when i had it boxed.
2 if you wre to run it like that and it did force air in you could find it may run lean .
3 if your drawing is corect it would be in low presure zone in which case you could starve the turbo of air.
just my thoughts
2..Its already forced by way of the turbo so i imagine i would have to drive at light-speed to cause this air to drive the turbo faster than what it already spins via the exhaust gasses.
3..The speed of the car causes an increase in air pressure at the front...the remaining sheltered/lower pressure air is still normal surrounding air pressure.
Sheltered spots are not starved of oxygen otherwise every race car that drives in the sheltered lower pressure slipstream of the car in front would suffer engine damage...and they dont!
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??? if i source the air from outside the engine bay then this incoming air is colder!..and this applies to NA and FI.2low2c wrote:turbo cars run better in colder tempretuers because the intercooler is colder not the incoming air.
Once the air is moving through the intake system i am of the opinion that cooler air at the start is better then trying to cool engine compartment air.
We might be splitting hairs but if it works for me thats whats most important
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Just to put my two cents in, which actually amounts to very little, since I know very little, but I thought the whole point is to try and get as much air into the manifold as possible and as cold as possible.
Cold air is denser than hot air, so contains more oxygen for the same cubic amount, therefor better cleaner bang?? Much the same as running a car as close to sea level will net more HP than running it up at a high altitude because the oxygen in the air is so thin?
The colder the air you can get into the intake the less the intercooler has to do, so couldn't you either do a smaller intercooler with the coolest place for your intake, or a larger intercooler with a not so great intake point as far as air temp goes, and still get the same result?
As for the low pressure point, would have thought that if the turbo is trying to suck in more air than is actually there, going to run into some problems, but someone with a bigger brain than mine would need to work out the volume of air present at various speeds compared to the volume of air the turbo is sucking in.
Guess another trick to cooling the air temp down, is either a water sprayer on the intercooler, or a water injection system on the intake manifold, you just have to make sure that the injector atomizes the water enough that it helps things, rather than damage.
So, like I said don't know much about it or whether what you have there is good or bad, but just thought I would put my perspective on it.
Cold air is denser than hot air, so contains more oxygen for the same cubic amount, therefor better cleaner bang?? Much the same as running a car as close to sea level will net more HP than running it up at a high altitude because the oxygen in the air is so thin?
The colder the air you can get into the intake the less the intercooler has to do, so couldn't you either do a smaller intercooler with the coolest place for your intake, or a larger intercooler with a not so great intake point as far as air temp goes, and still get the same result?
As for the low pressure point, would have thought that if the turbo is trying to suck in more air than is actually there, going to run into some problems, but someone with a bigger brain than mine would need to work out the volume of air present at various speeds compared to the volume of air the turbo is sucking in.
Guess another trick to cooling the air temp down, is either a water sprayer on the intercooler, or a water injection system on the intake manifold, you just have to make sure that the injector atomizes the water enough that it helps things, rather than damage.
So, like I said don't know much about it or whether what you have there is good or bad, but just thought I would put my perspective on it.
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Cold-air intake for track days
from the manufacturer's perspective, warm air is good - the engine will warm up faster and fuel atomisation is better. Both good for emissions and fuel economy ratings. And most normal people never wring every last hp out of it
but for max power, yeah cold *dense* air is clearly better. Experimenting with the intake placement made this really obvious in my case (in front of radiator vs next to engine block)
another 2c...
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but for max power, yeah cold *dense* air is clearly better. Experimenting with the intake placement made this really obvious in my case (in front of radiator vs next to engine block)
another 2c...
[Posted via external email]
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Don't get me wrong, obtaining cold air is a good idea! But the question is whether adding the cold air intake is a step backwards in terms of overall performance. The options as I see them are:
Non-cold air intake = base HP & base Cd = baseline 'speed'
Cold air intake with headlight cover removed = higher HP but higher Cd = possibly slower
Cold air intake but with more efficient ducting = higher HP and negligible change in Cd = possibly faster.
Non-cold air intake = base HP & base Cd = baseline 'speed'
Cold air intake with headlight cover removed = higher HP but higher Cd = possibly slower
Cold air intake but with more efficient ducting = higher HP and negligible change in Cd = possibly faster.
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2LOW2C, you are not 100% correct about intercoolers. If the air flowing across an intercooler is say 28c on one day then on a winters day 10c the intake temperature WILL be lower on the 10c day. An intercooler can only produce air at the temperature flowing over it (or close to it). So that is why (even with an intercooler) turbo cars have more power on cooler days.
warrior
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http://www.youtube.com/watch?v=gCi2yo4UqPI
These guys proved it does make a small gain even if they weren't convinced!
But an incremental gain is a "gain".
These guys proved it does make a small gain even if they weren't convinced!
But an incremental gain is a "gain".
1989 NA 1650
1998 NB 1800
2005 NC 2000
1990 Landcruiser
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1990 Landcruiser
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