Cold air feed
17 August 2007, 10:44 AM
#1
Cold air feed
Thinking of installing a cold air feed to MY2003 STi, before fitting a RCM induction kit. I've seen a few done by cutting a hole in the fog light cover and routing the feed from there. Does anyone who's done this suffer from water working it's way up the pipe on rainy days or when driving through puddles ?
If not it's fiting a Chargespeed or Zerosports brake duct and using that instead of cutting holes in the foglight cover.
Any other suggestions
If not it's fiting a Chargespeed or Zerosports brake duct and using that instead of cutting holes in the foglight cover.
Any other suggestions
Last edited by B0DSKI; 17 August 2007 at 10:58 AM.
17 August 2007, 11:09 AM
#6
Theres another thread on this here
https://www.scoobynet.com/members-ga...-air-feed.html
By the time I'd posted, they'd stated they had a newer car, principles are the same though
https://www.scoobynet.com/members-ga...-air-feed.html
By the time I'd posted, they'd stated they had a newer car, principles are the same though
17 August 2007, 11:39 AM
#7
this is mine:
I have had no problems at all with water ingress - even when I had this directly connected to the std Air Box.
Now I have a 89mm ID tube going from this to the inner arch - about 30cm in length to provide the CAI with plenty of cold air.
3 1/2 min job to fit it.
I have had no problems at all with water ingress - even when I had this directly connected to the std Air Box.
Now I have a 89mm ID tube going from this to the inner arch - about 30cm in length to provide the CAI with plenty of cold air.
3 1/2 min job to fit it.
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17 August 2007, 12:13 PM
#9
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Has anyone ever actually tried putting a temperature probe near the airbox to see if there's actually anything to be gained by such a modification?
17 August 2007, 12:47 PM
#10
there is one there as std measuring intake temp (this is at the MAF)
I have also installed one measuring at the throttle body - after it has been through the turbo and IC.
Both show a substantial drop from a little thought going into where the air is coming from and how cool it is.
I have also installed one measuring at the throttle body - after it has been through the turbo and IC.
Both show a substantial drop from a little thought going into where the air is coming from and how cool it is.
17 August 2007, 12:52 PM
#11
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I used a holesaw to cut through the fog cover on my 03, then attached the cold air feed, even after all this heavy rain, never seen a drop of water getting in the engine bay!!
Mike
Mike
17 August 2007, 01:01 PM
#12
Just dug out the stats on my cold air feed:
Charge temps (measured at throttle body) on cruise:
- std air box and snorkle = ambient +6C
- std air box and cold air feed = ambient + 3C
- std air box and cold air feed and throttle coolant re-route = ambient +2C
- APS kit with cold air feed from bumper & throttle coolant reroute = ambient +0C
Water spray drops the charge temp around 2C on cruise but have no measurement of WOT effect.
Charge temps (measured at throttle body) on cruise:
- std air box and snorkle = ambient +6C
- std air box and cold air feed = ambient + 3C
- std air box and cold air feed and throttle coolant re-route = ambient +2C
- APS kit with cold air feed from bumper & throttle coolant reroute = ambient +0C
Water spray drops the charge temp around 2C on cruise but have no measurement of WOT effect.
17 August 2007, 02:07 PM
#14
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see my view my scooby for the chargespped root although technically isn't not my car anymore as i have just sold her!)
Never had probs with water working it way up though did have to turn round once due to the road being a foot deep in water - me thinks that wouldn't have done the car any good!
Never had probs with water working it way up though did have to turn round once due to the road being a foot deep in water - me thinks that wouldn't have done the car any good!
17 August 2007, 02:10 PM
#16
see my view my scooby for the chargespped root although technically isn't not my car anymore as i have just sold her!)
Never had probs with water working it way up though did have to turn round once due to the road being a foot deep in water - me thinks that wouldn't have done the car any good!
Never had probs with water working it way up though did have to turn round once due to the road being a foot deep in water - me thinks that wouldn't have done the car any good!
17 August 2007, 03:51 PM
#18
I have an 02 STI with a Hyperflow induction kit (one of the green cylindrical ones) inside the wing:
The foglight cover remains intact, with no hole cut. When the car was being mapped by Paul Blamire it was on the rollers for well over an hour, during which the intake air temp rose by a total of about 4oC above ambient.
Obviously the filter is NOT protected if fording deep water, but is protected from any rain or spray - I've driven through some very heavy rain with no performance issues.
M
The foglight cover remains intact, with no hole cut. When the car was being mapped by Paul Blamire it was on the rollers for well over an hour, during which the intake air temp rose by a total of about 4oC above ambient.
Obviously the filter is NOT protected if fording deep water, but is protected from any rain or spray - I've driven through some very heavy rain with no performance issues.
M
17 August 2007, 04:49 PM
#19
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