Scrming's Air Intake Experiment - Part II

[scrming]

Since the IAT relocation experiment went so well, I decided to tackle the intake tube.

Now when I first got my car I had asked Scott from MRT what that big appendage on the left side of the intake tube ways since I had really never seen one like that... He explained it was a silencer/resonator. That it's function was to help eliminate intake noise. And as we all know it does a great job! Even with a K&N filter and the stock snorkel off you cannot hear ANY intake noise!

Scott went on to explain that the silencer/resonator works but it does disrupt the air flow going into the throttle which in turn has a negative effect on performance! Since I don't mind the sucking sound I figured I needed to lose the silencer... First thought was to just cut it off... but I backed off that idea....

So one day walking through the auto parts store I happened to see some universal CAI kits and parts... Hmmm... So I decided to buy some of these parts and see if I could put together my own intake tube.... So I bought a handful of stuff and headed home... and this is what I came up with!

SO...

90 degree elbow, vacuum adapter, 45 degree elbow. I had to cut the 45 degree elbow.

http://www.johnnystacks.com/gallery/d/10430-2/tube2.jpg

Stock vs new...
http://www.johnnystacks.com/gallery/d/10433-2/intake1.jpg

The stock silencer/resonator... it's like a figure 8...
http://www.johnnystacks.com/gallery/d/10439-2/intake10.jpg

The hole for the silencer...
http://www.johnnystacks.com/gallery/d/10448-2/intake11.jpg

And the hole for the pcv connection... again right before the TB...
http://www.johnnystacks.com/gallery/d/10454-2/intake12.jpg


and now... the new tube installed.

http://www.johnnystacks.com/gallery/d/10449-1/intake4.jpg


http://www.johnnystacks.com/gallery/d/10434-1/intake2.jpg

and finally... a little video clip... (listen with your headphones)

who9ajZqS7k


Here's the part list:

Spectre - Air Intake Tube - Part Number: 8698 - $10.00

Spectre - Air Intake Vacuum/Sensor Adapter - Part Number: 8707 - $11.99

Spectre - Air Intake Tube - Part Number: 8738 - $11.99

Spectre - Coupler/Reducer Combo - Part Number: 8771 - $7.99 (2 of them)

Also needed a piece of hose... so basically did this for $50... you may be able to find the piece cheaper online... I just bought them at the local part store...

Big day will be Saturday... Car goes on the dyno! It is a "Dyno Day" though so I'll only get a couple of pulls... unlike when I buy my usual dyno time where I get 4 or 5 pulls... Since I like the way this turned out I'm thinking I will just dyno the IAT relocation and new tube all together....

[Luwinkle]

You should try replacing the airbox with a K&N cone filter or something. :P

[BuellinBeef]

Both posts are very interesting.....I'm going to be keeping an eye on this thread!!!

Do any of the CAI kits that are available relocate the sensor? If they don't perhaps they should!!

[tradosaurus]

What is the part number for the vacuum adapter and what type of piece of hose did you use?

Also how did you assemble the chrome pieces? Just snap together.

Thanks.

[scrming]

Thanks guys!

@Luwinkle... I think the stock air box does a really good job of grabbing the cooler air from the front of the car... I did add a K&N drop in filter for fun a while back.. LOL!

@Buellinbeef... None of the kits I seen offer any kind of relocation...

@tradosaurus... the pieces fit together and are held together by the collars. I actually bought a bigger kit, Spectre part # 8208:

See: http://www.streetsideauto.com/products.asp?ptid=4555&brand=BGCX&series=Modular&partnumber=8208&Skip=True&LookupType=NON&Reset=True&utm_source=GoogleShopping&utm_medium=GoogleShopping&utm_term=GoogleShopping&utm_content=GoogleShopping&utm_campaign=GoogleShopping

The 8208 came with a RUBBER coupler, not the more stiff silicone coupler... however with the 8208 you still need the 90 degree elbow....

And for the tube to air box i really think you want a rubber connector...

for the hose it's just like 1/2 inch flex hose...

Also here's a little better video I made today...

http://www.youtube.com/watch?v=UVFUO9ae7mc

[cowboy1948]

:cool: Cool job. I like that.:thumbsup::5go:

[cowboy1948]

Thanks guys!

@Luwinkle... I think the stock air box does a really good job of grabbing the cooler air from the front of the car... I did add a K&N drop in filter for fun a while back.. LOL!

@Buellinbeef... None of the kits I seen offer any kind of relocation...

@tradosaurus... the pieces fit together and are held together by the collars. I actually bought a bigger kit, Spectre part # 8208:

See: http://www.streetsideauto.com/products.asp?ptid=4555&brand=BGCX&series=Modular&partnumber=8208&Skip=True&LookupType=NON&Reset=True&utm_source=GoogleShopping&utm_medium=GoogleShopping&utm_term=GoogleShopping&utm_content=GoogleShopping&utm_campaign=GoogleShopping

The 8208 came with a RUBBER coupler, not the more stiff silicone coupler... however with the 8208 you still need the 90 degree elbow....

And for the tube to air box i really think you want a rubber connector...

for the hose it's just like 1/2 inch flex hose...

Also here's a little better video I made today...

http://www.youtube.com/watch?v=UVFUO9ae7mc

What store did you buy that all at.:thumbsup:

[scrming]

What store did you buy that all at.:thumbsup:

Thanks...

Got it all locally at http://www.oreillyauto.com

[54inches]

Great work. It looks professional.

[BuellinBeef]

Seems to me both V6 and V8 will benefit from moving the sensor away from the engine-think I'll look into it when my CAI kit arrives.

Well made kit you have there Scrming

[scrming]

Ok... so put the car on the dyno....

My home made tube FAILED!!!! The new tube was neck and neck with the stock tube but the home made tube started making LESS power at around 5800 RPM... the 90 turn is the most likely culprit....

The IAT experiment did show some promise! LOL

[cowboy1948]

Ok... so put the car on the dyno....

My home made tube FAILED!!!! The new tube was neck and neck with the stock tube but the home made tube started making LESS power at around 5800 RPM... the 90 turn is the most likely culprit....

The IAT experiment did show some promise! LOL

What you going to do now? The home made intake is probley ok for day to day driving?:thumbsup::)

[54inches]

Post the dyno sheets!

What does the V6 peak at?

Hell it may be the box.

[scrming]

Post the dyno sheets!

What does the V6 peak at?

Hell it may be the box.

Oops... Sorry... Rest of the weeks was crazy.... Here is the sheet... You can see at about 5800 where the DIY tube drops off compared to the stock tube... this was back to back testing...

http://www.johnnystacks.com/gallery/d/10461-1/tube.jpg

[JDP Motorsports]

I'm not a big fan of metal intake tubes.... Too much heat soak. The concept is great the only problem is how sensitive these computers are to flow. It isn't trivial getting the MAF placed correctly... Good stuff though!! :thumbsup:

Kind regards,

[scrming]

I'm not a big fan of metal intake tubes.... Too much heat soak. The concept is great the only problem is how sensitive these computers are to flow. It isn't trivial getting the MAF placed correctly... Good stuff though!! :thumbsup:

Kind regards,

The tube is actually plastic with a chrome finish... as it turns out the tube ended up making LESS power at the top end due to the 90 degree bend... which makes you wonder about some of the CAI kits I've seen with the same kind of bend....

so it's back to the drawing board... LOL

[JDP Motorsports]

The tube is actually plastic with a chrome finish... as it turns out the tube ended up making LESS power at the top end due to the 90 degree bend... which makes you wonder about some of the CAI kits I've seen with the same kind of bend....

so it's back to the drawing board... LOL

:eek: Fake chrome! :lol:

A lot of factors go into designing a system to work correct and when you change the tube the MAF must be placed in the correct location to increase performance; it needs to read the incoming air correctly. I'd attribute your finds to that before the 90. Honestly the tube doesn't look very efficient either... I did something very similar to this when I was younger; my buddies Mazda. It didn't workout so well! :lol:

Good luck with your experiments! :thumbsup:

Kind regards,

[scrming]

:eek: Fake chrome! :lol:

A lot of factors go into designing a system to work correct and when you change the tube the MAF must be placed in the correct location to increase performance; it needs to read the incoming air correctly. I'd attribute your finds to that before the 90. Honestly the tube doesn't look very efficient either... I did something very similar to this when I was younger; my buddies Mazda. It didn't workout so well! :lol:

Good luck with your experiments! :thumbsup:

Kind regards,

The MAF location is still in the stock location. All I did was replace the tube...

[JDP Motorsports]

The MAF location is still in the stock location. All I did was replace the tube...

The flow characteristics of the new tube are going to be different and that's where the problem comes in..... As the air goes through the tube it behaves different than it does with the factory tube. This means the sensor isn't reading optimally. You'll see manufactures move the MAF around to find the optimal position. I worked for K&N for awhile and you'd be amazed at the processes they go through to get it right for each application.

Kind regards,

[scrming]

The flow characteristics of the new tube are going to be different and that's where the problem comes in..... As the air goes through the tube it behaves different than it does with the factory tube. This means the sensor isn't reading optimally. You'll see manufactures move the MAF around to find the optimal position. I worked for K&N for awhile and you'd be amazed at the processes they go through to get it right for each application.

Kind regards,

Looking at the dyno sheet you can see the new tube performed basically identically as the stock tube until about 5800 RPM...

http://www.johnnystacks.com/gallery/d/10461-1/tube.jpg

That's where we figured the harsh 90 was killing things..