intake questions

[07teebeeLT]

ok first:

1 - Does anyone offer an intake for an 07 that mounts direct to the throttlebody?? (K&N claims their model that does is only good to 06)
2 - What (if any) are the disadvantages of mounting direct to the throttle body?
3 - What (if any) purpose, other than sound, does the intake resonator serve?
NOTE: I understand that, at idle, the lack of intake resonator will allow intake temps to rise faster and above stock level.
4 - If above is true would wrapping the intake tube that is in place of the intake resonator in exhaust wrap help? paint it with high temp paint? some sort of ceramic paint?
5 - What could be done to keep the pipe insulated?

Basically i want a "CAI" however only one offered for my 07 is mounted to the intake resonator. SOOOOO i was either thinking go with an older model that mounts to the throttle body ORRRR do a custom set up from the one end of the "shorter" k&n to the throttle body.


Let me know if im on the right track or if im just dreaming stupid dreams.

Thanks fellas

 

[AtlWrk]

Not sure why something that works on an 06 wouldn't fit an 07?? What are your expectations and goals for this endeavor?

FWIW, I was able to replace the resonator with a short piece of ABS pipe (3inch diameter I believe) from the stock flex tube to the throttle body. It wasn't perfect as the the input and output of the resonator aren't exactly in line. Depending on how much flex there is in the coupling you might get away with that. You'll also have to fashion a way to connect the PCV line to the intake. That being said, I found the resulting noise intolerable and went back to the resonator. IMHO the only genuine reason to remove the resonator is aesthetics. You won't see any performance improvements.

 

[The_Roadie]

My question as well. Of what benefit is cold air? The PCM adjusts the mixture.

Best bang for the buck mod continues to be a PCMofNC tune. Real performance gains, not claims. Yes, you can use more fuel doing it - removing GM torque management does that.

 

[07teebeeLT]

I don't see why 06 wouldn't work on 07 either.... To be honest looks and tone are probably what I'm looking for more than performance out of the system.

 

[dmanns67]

The intake design is different between model years 2002-2005 and 2006-2009. If you buy an intake for a 02-05 you will have to modify it. There will be no spot for your MAF sensor and it will have a fitting for the IAT sensor that you will need to seal. You will also need to add a hose (1/2" ID) for the blow back, running from the top of the engine to the intake tube.

Initially searching for an intake for my 2007 TB, I could not find any intake for the 06-09 that ran directly to the throttle body. However, you can still remove the resonator, add an 8" long, 3.5" O.D. piece of tubing in between the throttle body and intake tube. You will need to pick up an additional rubber coupling and a couple 4" hose clamps.

Very simple to do. I picked up everything from Lowe's for less than $10. Below is a pic of what I am talking about.



Parts List

-3.5" OD PVC tubing 8" long
-12" long 1/2" ID Goodyear hose (This is used for the breather from the top of the engine to the intake. Some people choose to put a small filter over the port on the top of the engine.
-1/2" ID barb fitting
-(4) 4" worm gear hose clamps
-12" long 3/4" split wire loom (dress up hose if you choose)
-Paint for the tubing if you choose. (I used plast dip for the PVC. You could plasti dip the hose as well)

With the barb fitting, I cut it off at the base where the threads start and used JB Weld to attach it to the PVC tube. After the JB Weld cured, I drilled down through the barb fitting into the intake tube as I did not want the threads obstructing any airflow. You will also need to grind reliefs in the PVC where it contacts the coils on each side. I think I ground about almost half through, quarter sized, on the PVC. It helps to have a Dremel.

 

[07teebeeLT]

...

thats exactly what i was thinking.... how do you like that setup?

 

[dmanns67]

thats exactly what i was thinking.... how do you like that setup?

I like the new tone of the exhaust and engine with the resonator removed. Also when it is time to clean the throttle body, you have easier access.

 

[07teebeeLT]

I like the new tone of the exhaust and engine with the resonator removed. Also when it is time to clean the throttle body, you have easier access.

What do you think of the heating? Have you noticed anything? Maybe wrap the PVC portion in exhaust wrap or heat reflective tape?

 

[smt 59]

This is the route that I'm going. I'm liking it.

 

[Grimor]

What do you think of the heating? Have you noticed anything? Maybe wrap the PVC portion in exhaust wrap or heat reflective tape?

doesn't really matter. once you start moving it's the same.

 

[dmanns67]

What do you think of the heating? Have you noticed anything? Maybe wrap the PVC portion in exhaust wrap or heat reflective tape?

I have not noticed anything with heat. I agree with Grimor. If you think about it the intake resonator is plastic and sits on top of the engine which would absorb heat while the truck is sitting still idling. If you have the TorquePro app, you can watch the air temp increase while the truck is sitting at a stop light or parked. With the truck moving I usually see temps in between 8*F-12*F above ambient temp.

You could run a test on the intake as is and then wrap the intake tube and see if there is any difference in air temps. Air is constantly moving so I doubt you would seem much difference if any at all.

 

[07teebeeLT]

I have not noticed anything with heat. I agree with Grimor. If you think about it the intake resonator is plastic and sits on top of the engine which would absorb heat while the truck is sitting still idling. If you have the TorquePro app, you can watch the air temp increase while the truck is sitting at a stop light or parked. With the truck moving I usually see temps in between 8*F-12*F above ambient temp.

You could run a test on the intake as is and then wrap the intake tube and see if there is any difference in air temps. Air is constantly moving so I doubt you would seem much difference if any at all.

I guess so, I am thinking thermodynamics, with the larger resonator the motor is trying to heat a larger volume of air at any given time. When you reduce the volume to that of the pvc pipe heat transfer happens faster. Thats y temps increase at idle when the engine isnt sucking as much air. Heat tape and/or other thermal wrap is probably cheap insurance.

 

[Blckshdw]

For what this mod is worth (sound change and looks), you don't need to over think this. Your IATs will drop back down to about 10* above ambient when you start moving. That doesn't leave you much room for improvement with additional shielding or heat wrap. And like Bill said, the PCM adjusts the AFR to compensate for the IATs, so it doesn't matter really.

 

[bobdec]

I going to agree with post #3 .

FIRST I agree most CAI branded systems have less air restriction,assuming the valve train and exhaust are not a bottleneck, more air flow in and out will increase engine power. I believe that's what the dyno gains are attributed to.

However since colder air is more dense (heavier) the PCM sees the cooler intake air temp and adds more fuel to maintain correct AFR (14.7 grams of air to 1 gram of gasoline). Bottom line that means with the throttle blade opened the same, the PCM is adding more fuel, so you are getting more air, fuel and power at less throttle. But you are still using the same amount of fuel if you were using warm air with throttle blade opened a bit more.

as a sidebar: I noticed but K&N web site now marketing the intakes "High Performance' not CAI.

 

[dmanns67]

When I bought my K&N intake a few years ago they were calling it a performance intake versus cold air. As we all know these are not cold air intakes.

The only way you could consider them cold air is if they were on the outside of the engine bay. You would still be pulling in ambient air temp, but would be "cooler" than that of the air in the engine bay. I have seen some pic of SS owners actually drill a hole into their fender well for the intake.

Back in the day, I had an intake on my Civic that went down behind the front bumper cover.

I see about 10* above ambient temp on my current K&N setup. I cannot see the benefit to running the intake outside of the engine bay to save 10*. I doubt that would make much of a difference.