standard air box clearances, how much cold air really gets to it.

[fassi1]

http://www.donaldson.com/en/engine/s...973.pdf‎

This is interesting. Flared entrance makes big improvement in air flow.

[fassi1]

Trumpet and flexi pipe arrived so managed to get them fitted bu haven't cut in to the snorkel yet, still waitting for other bits.

[Davezj]

chris you might find the grill in front of the trumpet will almost completely distroy the ram effect you are look to create in the setup on the picture.
you might want to do a test with your pressure meter with the grill fitted and not fitted. just to check my thoughts.

[fassi1]

Still waitting for vacuum gauge. I want to test OEM intake (snorkel) without cutting in additional air ducting first so it can be compared to modified intake.
Can do test without mesh as well.

[exevoowner]

I know this sounds silly but is there enough room to enlarge the intake snorkle as looking in krises picture it does not meet the top of air filter box ? Im prob blowing hot air and thinking aloud if i get chance over weekend i will see if therr any way to show you guys what i mean

[Davezj]

Still waitting for vacuum gauge. I want to test OEM intake (snorkel) without cutting in additional air ducting first so it can be compared to modified intake.
Can do test without mesh as well.

sound like the correct plan of attack to me nice to see you are doing the job properly, no properly is not the correct word. Thoroughly is the right word.

[fassi1]

I know this sounds silly but is there enough room to enlarge the intake snorkle as looking in krises picture it does not meet the top of air filter box ? Im prob blowing hot air and thinking aloud if i get chance over weekend i will see if therr any way to show you guys what i mean

Snorkel will remain in its OEM place.
What I'm gonna do is cut a hole out in its right hand wall and some way attache 60mm coupler.
Took me while to find something suitabla for this coupler but I've come across webasto 60mm coupler joiner seen on the picture.
I'm gonna cut it in half and use part with cross to the right of the black line. The idea is to keep the air flowing nicely avoiding sharp bends.
Everything arrived apart from vacuum gauge which is disappointing cause I was hoping for some testing this weekend.

[fassi1]

I had a good chance yesterday to hava a look at air intake entrance on Audi A6 Allroad 2.7bit when servicing lpg system.
I must say it looks much better. It is definitely much better designed than VR4's.
It's located right behind front grill so I guess is located right in high pressure area.

[exevoowner]

Yea looks inpresive but dont think there anyway to make ours the same

[fassi1]

I should have measured it. I really like the design of of it. It definitely helps to drag more air in instead of restricting intake.

[exevoowner]

Did notice on mine today that there are 2 molded peices inside to hold upper part up if its worth removing them also ?

[Davezj]

can't you leave the snorkel as it is and fit the pipe to directly to the air box instead, so you are adding the full extra air from the extra pipe rather than just adding more air to the already small snorkel.

[fassi1]

can't you leave the snorkel as it is and fit the pipe to directly to the air box instead, so you are adding the full extra air from the extra pipe rather than just adding more air to the already small snorkel.

I'm adding the full extra air from the extra pipe, explanation for that is:
Snorkel exit cross section is around 6786 mm2, mid section where new pipe will be attached has the same cross section.
Snorkel entrance cross section is around 4554 mm2, extra pipe cross section is 2462 mm2 so in total 7015 mm2
which means im basicly matching snorkel's exit. By attaching it to the snorkel I can achieve smooth and even airflow in to the airbox.
I wouldn't achieve more by attaching the extra pipe directly to the airbox.

[Davezj]

Fair enough, i just thought it would be worth adding it directly to the air box.

[fassi1]

This is what is gonna look like.
Still waitting for vacuum gauge so haven't fitted it properly yet.

[Davezj]

that looks really good, it is going to be nice bit of fabrication.

[SGHOM]

http://www.clubvr4.com/forum/showthr...light=more+air

[fassi1]

Happy days. Vacuum gauge arrived.
What would be the best way to test it, any specific speed, gear, any ideas?

[Davezj]

does it come with just a tube to attach to the gauge or is an electronic sensor for the pressure.

the electronic sensor will be much easier to test and install.

[fassi1]

It's the one with tube beeing attched to the back of the gauge.
Install wont be a problem, it's just temporary for the test.