007+cai=?

[Cedrick]

Hey everyone,

Right after my exams are done Im thinking about picking up a CAI and a forge 007 DV, does anyone have any suggestions about which CAI I should get? Or any concerns or problems theyve had with the 007 or their CAI? Also, will I get that sweet ass "pshewwwwww" sound? Thats really what Im after! I know, I know, Im a ricer at heart

Thanx for your help!

Ceddy!

[QuA]

Re: 007+cai=?

You gotta love the bird chirp. My car sounds like a bird commin' at you.

007p+Reversed Autotech 3" CAI + make sure you get lots of boost too...

Vroooooooom.... Pshhhhhh...... Chirp.

[Klobi-One-Kinobi]

Re: 007+cai=?

I've been thinking of a cai too, mostly for the sound.

Dunno though, stock box is nice for peace of mind.

[Cedrick]

Re: 007+cai=?

I wont be getting a chip till I can find an APR dealer in Alberta, Cam from Diablo motor sports was supposed to call me back about his hook up but never did :( So Ill be running stock boost levels for a while, will I still get the chirp?

[Simon]

Re: 007+cai=?

hey cedrick, if you want I can give you a preview on sunday. if you have the 007 in regular position its a PSSSH sound, if you reverse it, its a CHIRP sound.

[R_Ethug]

Re: 007+cai=?

for the CAI get the EVO www.evoms.com IMO its the best one on the market. I know they are all filters on a stick but mine fits perfect and the quality is there and thats coming from people with different brands.

[Simon]

Re: 007+cai=?

for the CAI get the EVO www.evoms.com IMO its the best one on the market. I know they are all filters on a stick but mine fits perfect and the quality is there and thats coming from people with different brands.

everyones gonna say their CAI is the best. imo, mine is the best because its CHROME and less than HALF the price of the EVO. enough said.

[Aleks]

Re: 007+cai=?

I'm happy with my eurosport coolflo/ITG combo.....don't see a need for a CAI arm reaching into the fender, expecially considering we're intercooled, and everyone knows that air heats when compressed, that hairdryer behind the engine negates the purpose of the CAI.....just my .02.....

[1.8Trip]

Re: 007+cai=?

I was talking to Ken from C1 yesterday and he said that he was headed down to Alabama this week to get the training on APR. So maybe it will really happen this time "in a week" or so?

Oh, and I'm happy with my AEM CAI and Forge 007 DV. My setup is definately the BEST. and its blue and makes lots of noise too.

I wont be getting a chip till I can find an APR dealer in Alberta, Cam from Diablo motor sports was supposed to call me back about his hook up but never did :( So Ill be running stock boost levels for a while, will I still get the chirp?

[R_Ethug]

Re: 007+cai=?

really neal about farking time jeebus crispy

[1.8Trip]

Re: 007+cai=?

No kidding. I really wanted a switchable program that was more local (than Edmonton). Oh well, I'm really happy with Revo and at least now there are more options for everyone else. Ryan, you should get APR!

[R_Ethug]

Re: 007+cai=?

lol yea if they do get it then i probably will..

[T is for Turbo]

Re: 007+cai=?

i love my 007 with the autotech cai. sweet pshhhh sound. plus its aluminum so it won't rust like the eurosport one.

[Kor]

Re: 007+cai=?

I have the Neuspeed CAI and am happy I bought it.

[1.8Trip]

Re: 007+cai=?

Alex, this is a pretty interesting comment so I thought I would look into the science behind this. You're partly right. The compression of air does increase the temperature of the gas.

This is where I disclaim stuff. I am relying on stuff I took in school over 5 years ago. While I understand the equation and what it's trying to say, I can't guarantee I dug up the right equation for the question I am asking.

However, I dug up my old thermodynamics textbook and did a bit of reviewing and found this equation:

wcomp = [k / (k -1)] R T1 [1 - ( P2 / P1)^((k-1)/k)]

where the constants for air are:
k = 1.4
R = 0.287 KJ/kg K

This is the equation for the specific work required for an isentropic compressor to compress a fluid (gases are considered fluids in thermo) from an inlet pressure (P1) to another pressure (P2). P1 and P2 are absolute pressures in kPa btw. T1 is the inlet temperature of the fluid.

I threw in some arbitrary numbers to see what kind of effect the inlet temp would have on the work required to obtain a certain amount of boost if the intake were placed outside the engine compartment. I chose 15C as an inlet temp (average summer temp for Calgary), P1 pressure of 89 kPa (average pressure for our elevation) and a P2 pressure of 124 kPa (18 psig) + 89 kPa = 213 kPa.

Plugged and chugged:
wcomp = -81.8 kJ/kg
(the neg. number just means work went into the process rather than out)

I then assumed the effect of putting the intake inside the engine compartment. I completely and totally guessed that the temperature around the area near the battery as around 50C.

Plugged and chugged again:
wcomp = -91.8 kJ/kg

Basically, 11% less work is required to get 18 psi boost when the inlet temp is 15C rather than 50C. Then I realized that the ECU actually calls for more boost (P2) when the air is warmer to try and maintain a certain mass flow rate. Meaning the work required is more like 15% less when inlet is 15C rather than 50C.

So in short, I think that the filter on the stick is effective in reducing the amount of work that the turbo has to do to attain a certain boost. This could help to explain why many people notice a quicker turbo response when they do install a CAI.

Finally, this analysis assumes that flow is not choked. That is, I am not examining the difference in increased flow from a larger diameter pipe, tube, plenum, filter or stick.

Peace

I'm happy with my eurosport coolflo/ITG combo.....don't see a need for a CAI arm reaching into the fender, expecially considering we're intercooled, and everyone knows that air heats when compressed, that hairdryer behind the engine negates the purpose of the CAI.....just my .02.....