Author Topic: DIY Cold air intake not working right (Read 32608 times)

Vanimp · « **Reply #75 on:** May 05, 2011, 06:44:57 AM »

I have the same problem.
P0101
I've installed the BMC aribox.
http://www.bmcairfilters.com/search_a.aspx?marca=27&lng=1

I'm going to instal the OEM back, temporaly...

Which airfilter doesn't give any problems?
Suggestions pls?

Arabas · « **Reply #76 on:** May 05, 2011, 06:49:28 AM »

Quote from: Vanimp on May 05, 2011, 06:44:57 AM

I have the same problem.
P0101
I've installed the BMC aribox.
http://www.bmcairfilters.com/search_a.aspx?marca=27&lng=1

I'm going to instal the OEM back, temporaly...

Which airfilter doesn't give any problems?
Suggestions pls?

GMPP intake, Dejon with AEM filter, K&N typhoon. for the moment, these intakes have been tested and have been working properly on our cars.

if you are looking only for filters (not intake) try K&N. tested and OK

Kelu · « **Reply #77 on:** May 05, 2011, 07:00:20 AM »

Go with oem paper filter and stock airbox for debugging path.

Ag_Sky · « **Reply #78 on:** May 05, 2011, 09:52:32 PM »

Kagem it looks like you have the talents, skills and abilities to build a set of straightening vanes.

I think you could probally get by with a tube bundle a couple of inches long.

The installation effects of the piping is a major problem when trying to accurately measure gas (air) flows. If you Google straightening vanes you'll find allot of engineering effort has been made to minimize the effects from the installation effects from elbows, reducers, valves, etc.. I'm puzzled why the automotive industry doesn't use some of these techniques to improve the MAF sensor accuracy.

The flow stream can do some funny stuff particularly when your have two 90 degree bends rotated at different angles. The air will swirl around and hug walls of the tube. Additionally, your sensor may only be measuring ~60% of the total flow due to the flow stream is not uniform across the MAF sensor location. This swirl in your pipe could be moving back and forth across your MAF sensor and causing the problem.

Kagem · « **Reply #79 on:** May 07, 2011, 04:57:09 AM »

What my friend? Sorry but i don't get it....

P.S. I want to publicly thank Dave (elff) for sending me the plastic tube that goes after the turbo to the air box, for free! This sets an example of how forum members should act as, helping one another disinterestedly. keep the good karma spread

Ag_Sky · « **Reply #80 on:** May 07, 2011, 07:03:19 AM »

Kagem:
Sorry I didn't make my point clear. Let me try again.

Where you have the sensor located now is to close to the 90 degree bend and the inlet to the turbo charger. I suspect the problems you’re having with your MAF sensor have to do with the flow stream profile in the tube. The 90 degree bend and the Turbo charger inlet just downstream of your MAF sensor are very disruptive to the flow stream.

Ideally you would like to have 10 tube diameters upstream of the MAF sensor and 5 tube diameters downstream of the MAF sensor of straight tubing free from bends or obstructions. This is to promote fully developed turbulent flow in the pipe. This means you want uniform air molecule distribution across the pipe and not a flow stream where the number of molecules are more on one side than the other. The MAF sensor samples the number of molecules in the middle and assumes that the cross section of the pipe has the number of air molecules consistently across the whole pipe. If this is not true than the air flow measurement is not accurate.

One way to condition the flow stream to correct for the installation effects from the bends and turns is to use straightening vanes or tubes to smooth out the air flow before it passes by the MAF sensor. For your application you could move the MAF sensor away for the 90 degree bend and install a tube bundle three tube diameters upstream of the MAF sensor. But, the first thing I would try would be to move the MAF sensor to equidistance in the straight section of your pipe.

Like I tell my wife, if you want something done right do it yourself two or three times. Good luck and happy motoring.

elff · « **Reply #81 on:** June 03, 2011, 03:30:19 PM »

Any Updates on this.
I need to make sure the white cars stay working and are the fastest!!

Kagem · « **Reply #82 on:** June 03, 2011, 07:34:40 PM »

I dropped the idea of the intake for the time, as i wasted money and time with no result. A friend of mine gave me his stock air inbox, so i am going to try and figure out a way to gut it, make it high flow, any ideas would be useful! The tube you sent me is sitting safe and with any chance i will put it on, maybe have a mechanic at the dealership put it for me. Thanks once again buddy!

elff · « **Reply #83 on:** June 03, 2011, 11:28:55 PM »

Your very welcome

Hammer modded his intake and hopefully will chime in

Arabas · « **Reply #84 on:** June 04, 2011, 04:02:03 AM »

kagem as for the tube elff sent you, i can put it on your car any time we meet.
as for chopping the stock airbox, i strongly suggest not to do it.
try K&N or Dejon intake

wspohn · « **Reply #85 on:** June 04, 2011, 10:27:55 AM »

Quote from: Kagem on June 03, 2011, 07:34:40 PM

I dropped the idea of the intake for the time, as i wasted money and time with no result. A friend of mine gave me his stock air inbox, so i am going to try and figure out a way to gut it, make it high flow, any ideas would be useful!

Here's an idea that will save you a lot of trouble. Leave it alone! The stock air box flows more air than your engine needs. Increasing that to an even higher theoretical flow capacity isn't going to accomplish a thing.

LatinVenom · « **Reply #86 on:** June 04, 2011, 11:26:02 AM »

My only advice would be to do the same thing the GM drift car did to theirs.
Just cut the baffle piece off. You make the cut about 2 inches in front of the air box itself.
However this was a race car.
My opinion is the same as wspohn leave it alone, unless you are going to add a larger turbo.
The other thing I have found is the clamps that hold the tube need to be tighten and also the tube better be flush at both ends.
My car with the large wheel turbo now responds a lot quicker and the psi comes on a lot faster than before doing the above.

shabby · « **Reply #87 on:** June 04, 2011, 11:49:33 AM »

Or you can experiment with a honeycomb insert, gmtech did that and it fixed his idle issue.

Kagem · « **Reply #88 on:** June 04, 2011, 12:50:55 PM »

Quote from: LatinVenom on June 04, 2011, 11:26:02 AM

The other thing I have found is the clamps that hold the tube need to be tighten and also the tube better be flush at both ends.
My car with the large wheel turbo now responds a lot quicker and the psi comes on a lot faster than before doing the above.

Be flush at both ends? Gee i didn't get that! You mean i should tighten all connections there so i do not have any loss or leak?
A honeycomb insert where shabby?

shabby · « **Reply #89 on:** June 04, 2011, 01:37:14 PM »

http://www.solsticeforum.com/forum/f63/lnf-big-turbo-swap-werks-gmtech-team-up-efr-6758-kit-68732/index4.html#post1043713
http://www.solsticeforum.com/forum/f63/lnf-big-turbo-swap-werks-gmtech-team-up-efr-6758-kit-68732/index4.html#post1043496
http://www.treadstoneperformance.com/product.phtml?p=2096&prodname=HoneyComb+MAF+Mass+Air+Meter+Airflow+Straightener

LatinVenom · « **Reply #90 on:** June 05, 2011, 04:39:08 PM »

Quote from: Kagem on June 04, 2011, 12:50:55 PM

Be flush at both ends? Gee i didn't get that! You mean i should tighten all connections there so i do not have any loss or leak?
A honeycomb insert where shabby?

Yes, to tighten them so not to have any lose or leak, but also they should be as close to the matted other end as possible, so when you tighten it is a good seal.

Kagem · « **Reply #91 on:** June 19, 2011, 12:57:10 PM »

Today i gutted a stock air inbox a friend gave me a while ago, and put it on the car. Haven't tried it yet and i won't be surprised if it doesn't work, it's just an experiment. Inside i have the k&n filter i was already using in my stock air box. I was always curious what's the role of these air traps in the first pic in the middle, i can think of some reasons but not sure....

wspohn · « **Reply #92 on:** June 19, 2011, 12:58:12 PM »

The stock air box is a very well crafted system with anti-resonance chambers, that does an amazingly effective job of quieting an otherwise noisy intake.

Kelu · « **Reply #93 on:** June 19, 2011, 01:04:29 PM »

Those things from front I think they are helping in a case of the impact, what is inside the box I think is noise reducers.

Sol Asylum · « **Reply #94 on:** June 19, 2011, 02:28:45 PM »

The air maze may also act as sort of a pre filter and keep larger particles and moisture from getting to the filter.

Gentleman Jack · « **Reply #95 on:** June 19, 2011, 04:34:07 PM »

Kagem,

I have to ask, why do you hate the stock intake so much? You just want to kill it over and over.. What did it ever do to you?

GJ

Arabas · « **Reply #96 on:** June 19, 2011, 04:39:28 PM »

Quote from: Gentleman Jack on June 19, 2011, 04:34:07 PM

Kagem,

I have to ask, why do you hate the stock intake so much? You just want to kill it over and over.. What did it ever do to you?

GJ

i agree with experimenting, but always play safe. monitor or log data and get advise from your tuner or someone who can help you.
why not go with a K&N or Dejon intake?

Kagem · « **Reply #97 on:** June 20, 2011, 01:53:01 AM »

GJ please repeat after me! Kalio gaidourodene para gaidourogyreve! It's something like ''better be safe than sorry'', but if you translate it in english it's ''better tie the donkey than loose it''. This is a spare inbox i gutted, so if it doesn't work i'll just put mine back on. I love experimenting, that's how the biggest inventors went famous, lol!
George, i dropped the case of going with an aftermarket intake other than the oem airbox, for now. After i install your turbo, if it works with the airbox i'll leave it that way. Lately crosses my mind that you should have put the airbox back then and see if the surge was less. If that turbo sucks that much of air maybe it will cooperate better with the airbox, maybe make some other mods too i have in mind, but i'll first try it with just the stock intake. It's the most friendly one for our car....

Gentleman Jack · « **Reply #98 on:** June 20, 2011, 12:41:38 PM »

Kagem
I love the saying. I will start using that...

Better to tie the donkey...

Sol Asylum · « **Reply #99 on:** June 20, 2011, 01:34:14 PM »

GJ if you need to start tying up the donkey you really need more help then most of us though.

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Author Topic: DIY Cold air intake not working right (Read 32608 times)