Stock Airbox + CAI

**T-onedc2** · 05-05-2008 09:44 PM

My reasoning for a drop in performance over a filter in box is the turbulence created when the air travels through the box upseting the smooth air flow to the throttle body, also the change in resonant frequency passing through the box may come into effect as well. Running a tube directly through the box may help.

**bennjamin** · 05-05-2008 09:46 PM

Originally Posted by T-onedc2

Running a tube directly through the box may help.

i thought this was the plan ? IE use the box as simply a "cover" for the pipe underneath...that goes straight thru like a injen intake etc.

**dsp26** · 05-05-2008 09:48 PM

Originally Posted by EKVTIR-T

Nah still try it.Better to get others experience and feedback too.
Did you ever try drilling more holes under the stock box?
Might free up the restriction a little?Just a thought.

still gonna finish it see how it goes.. overall budget including the piping is $60.. i've already got a pod.. quite a few unused ones actually lol

did that on my spare bottom.. worked a treat.. but still feels lacking

Originally Posted by T-onedc2

My reasoning for a drop in performance over a filter in box is the turbulence created when the air travels through the box upseting the smooth air flow to the throttle body, also the change in resonant frequency passing through the box may come into effect as well. Running a tube directly through the box may help.

yeah i think thats what EKVTIR-T is talking about... will still give it a try though...

Originally Posted by bennjamin

i thought this was the plan ? IE use the box as simply a "cover" for the pipe underneath...that goes straight thru like a injen intake etc.

nah couldn't in the first place but wish i could... however the method you mentioned above works with the DC4/2 airbox which i've already done to the mrs car... it's coz the box hole is actually flat and round...

i'll take a pic of the inside of the EG box.. brb

excuse the light, had to use my torch coz of my crappy phone camera...

**dsp26** · 05-05-2008 10:36 PM

OK.. also just did some measuring against stock reso box to get the bend right...

2 pieces of metal currently taped together until i get a mandrel bend made...

final setup should look something like:

**rayb3na_** · 05-05-2008 11:00 PM

das pretty gangster howd you attack the piping to the top of the box from the manifold?

**dsp26** · 05-05-2008 11:06 PM

Originally Posted by rayb3na_

das pretty gangster howd you attack the piping to the top of the box from the manifold?

was a $50 black ebay SRI.. cut 2inches off it and lines up straight to the 3in airbox... don't let the coupler fool ya... theres actually no gap between the pipe and airbox inlet...

standard EG airbox is only 2.5in i think though... my EG2/6 bos is 3in so got the 3in SRi to suit...

**dsp26** · 06-05-2008 07:29 PM

Originally Posted by EKVTIR-T

If I understand what your idea is.Having a pod connected to the bottom of the box with the box being empty and part of the intake path.
I have tried this and didn't yield good results.
To me,less torque right through to redline.
Gave a sort of empty feeling on acceleration.
Another down side but not important,it sounded horrible..
Look forward to your own feedback on it though.

OK... tested my dummy rig from the box to fender.... your report is exactly right...

- less torque right through to redline.
- Gave a sort of empty feeling on acceleration.

less torque part is understandable as per a normal cai.... felt happier above 4k-ish though and is noticable considering i filled up a full tank of mobil E10 93oct from bp 95oct...

and yeah empty feeling... feels a little more linear.... these results will definitely show up on dyno so i'll check it out in a bit... i'll try this for 2 weeks and update this thread...