Cold Air Induction Kits (CAI)

3.0 V6 24v TFSI - 329 bhp
adsgreen
Cruising
Posts: 5571
Joined: Mon Aug 16, 2010 9:54 am

Re: Cold Air Induction Kits (CAI)

Post by adsgreen » Wed Feb 06, 2013 11:35 pm

Silas wrote:Look as air gets colder it gets denser, this means more oxygen within a smaller volume, more oxygen = more power FACT
Bwhahahahahaahaha

Point.... Missed.

It's not cooling the air!
The air will never ever get colder than the ambient outside temperature.
So when the car is first started the air coming into the engine will be identical temperature regardless of how it gets there.
As far as charge temp goes this is the best the engine will get.

As you drive the intake system will heat up from radiated heat and thi will have an effect on the intake air charge.
A caf reduces this (but does not eliminate it) but at the end of the day it will still be slightly higher than ambient. As such power will be lower than what you could get.

I say again - caf does not cool air, doesn't increase density it perform any other made up fact.

RIV
Cruising
Posts: 5122
Joined: Wed Nov 30, 2011 10:27 pm

Re: Cold Air Induction Kits (CAI)

Post by RIV » Wed Feb 06, 2013 11:52 pm

I've already stated the obvious, end of story!! Cold air at speed increases performance, you ever wrong??

adsgreen
Cruising
Posts: 5571
Joined: Mon Aug 16, 2010 9:54 am

Re: Cold Air Induction Kits (CAI)

Post by adsgreen » Thu Feb 07, 2013 8:16 am

You've stated it wrong though.
the intake air temp will never be below ambient air temp so explain how it is cooling the air and adding more power??

Yes the air charge will be marginally cooler with a cai than without but it still won't give you any power above stock.
Not sure any other way of explaining it. you seem obsessed with the fact cold air is more dense - which is obviously so. The difference is that the cai simply isn't cooling air just taking slightly less hot air from somewhere else.
Not even considering the potential pumping and efficiency losses from having a considerably longer air channel to draw the air in.

Just saying the word 'fact' does not make it so.
It wasn't that long when the earth was flat-fact. Travelling at supersonic speed was impossible - fact.

No I am not right about everything but stuff I do know after hours and hours logging cars to squeeze every last bit out on track. This is something that I have looked into as air charge temp is key to aggressive timing.

RIV
Cruising
Posts: 5122
Joined: Wed Nov 30, 2011 10:27 pm

Re: Cold Air Induction Kits (CAI)

Post by RIV » Thu Feb 07, 2013 9:01 am

Ok we'll what about ram air filters :biggrin3:

adsgreen
Cruising
Posts: 5571
Joined: Mon Aug 16, 2010 9:54 am

Re: Cold Air Induction Kits (CAI)

Post by adsgreen » Thu Feb 07, 2013 1:18 pm

Silas wrote:Ok we'll what about ram air filters :biggrin3:
Arg! :biggrin3:
<pop>

User avatar
xxx_mojo_xxx
3rd Gear
Posts: 313
Joined: Mon Nov 19, 2012 1:24 pm

Re: Cold Air Induction Kits (CAI)

Post by xxx_mojo_xxx » Thu Feb 07, 2013 11:18 pm

What is ram air?

adsgreen
Cruising
Posts: 5571
Joined: Mon Aug 16, 2010 9:54 am

Re: Cold Air Induction Kits (CAI)

Post by adsgreen » Fri Feb 08, 2013 12:18 am

Ram air is where people think that if you have the air intake facing the direction of travel (generally with a big funnel) then more air is forced into engine meaning things must be better.
It's not quite as simple as that and the net result for a road caris non existent but people still buy into them.

User avatar
xxx_mojo_xxx
3rd Gear
Posts: 313
Joined: Mon Nov 19, 2012 1:24 pm

Re: Cold Air Induction Kits (CAI)

Post by xxx_mojo_xxx » Fri Feb 08, 2013 7:48 am

All this talk about induction kits, whether they increase power, and ram air, I'm wondering if its worth getting one now!

adsgreen
Cruising
Posts: 5571
Joined: Mon Aug 16, 2010 9:54 am

Re: Cold Air Induction Kits (CAI)

Post by adsgreen » Fri Feb 08, 2013 8:14 am

Imo, The cai is worth doing and should be a no brainer if the drivers radiator leaks.

User avatar
xxx_mojo_xxx
3rd Gear
Posts: 313
Joined: Mon Nov 19, 2012 1:24 pm

Re: Cold Air Induction Kits (CAI)

Post by xxx_mojo_xxx » Sat Feb 09, 2013 11:32 am

adsgreen wrote:Imo, The cai is worth doing and should be a no brainer if the drivers radiator leaks.
What?

Madmonkee
4th Gear
Posts: 513
Joined: Wed Jan 04, 2012 12:57 am

Cold Air Induction Kits (CAI)

Post by Madmonkee » Sat Feb 09, 2013 12:53 pm

^^^ if you aux rad starts to leak, rather than buying another to fix, take it out and in its place put a cold air feed, simples.

User avatar
xxx_mojo_xxx
3rd Gear
Posts: 313
Joined: Mon Nov 19, 2012 1:24 pm

Re: Cold Air Induction Kits (CAI)

Post by xxx_mojo_xxx » Sat Feb 09, 2013 2:59 pm

Madmonkee wrote:^^^ if you aux rad starts to leak, rather than buying another to fix, take it out and in its place put a cold air feed, simples.
Still don't understand...you got any pics?

adsgreen
Cruising
Posts: 5571
Joined: Mon Aug 16, 2010 9:54 am

Re: Cold Air Induction Kits (CAI)

Post by adsgreen » Sun Feb 10, 2013 9:49 am

Plenty on the search.
Essentially two small additional coolant radiators are probe to leaking. The drivers one can be replaced with a cold air feed direct to the airbox solving several possible issues.
- no more leaking aux rad
- cheaper than aux rad
- reduced heat soak
- no stuck throttle power flap
- power flap vacuum actuator removed so no chance of vac leak here

Post Reply

Return to “S4 (B8 Typ 8K) 2009-2016”

Who is online

Users browsing this forum: No registered users and 17 guests