OEM intake mod
#1
OEM intake mod
Here is a relatively low cost mod to those who decides to keep the oem intake but wants a little better performance.
Parts used:
- Stock intake airbox (04-06 TSX has the same box)
- 06 TSX intake tube
- A length of 3" dia aluminum intake pipe (ebay)
- K&N drop-in filter
- Two large dia. hose clamps
Tools used:
- 10mm and 8mm sockets to remove stock intake and cover.
- Dremel tool to shape airbox interior and front vent
The process involves with replacing the intake tube, air filter, removing airbox interior ribs, and installing an air tube. The pictures should be self explanatory.
Stock lid before The Comptech Icebox lid would probably work even better
Stock lid after I only remove the large cross bar
Bottom before
Bottom after I removed as much plastic ribs as possible to create a larger space
Air tube comparison 04/05 on the left. The slightly larger dia. 06 on the right
Some basic testing results
- The post mod with stock air filter has lowered the intake temp slightly when comparing to a completely stock setup.
- Throttle response with stock air filter and stock air tube seemed slightly sluggish when comparing to the K&N CAI.
- Throttle response with K&N drop-in filter and 06 air tube is actually pretty good, and very close to the K&N CAI.
- The air intake temp is about a few degrees warmer than the K&N CAI setup.
- Interior sound level is quieter with the stock intake mod at various rpm range and throttle inputs.
- Sorry, no dyno for this one.
Parts used:
- Stock intake airbox (04-06 TSX has the same box)
- 06 TSX intake tube
- A length of 3" dia aluminum intake pipe (ebay)
- K&N drop-in filter
- Two large dia. hose clamps
Tools used:
- 10mm and 8mm sockets to remove stock intake and cover.
- Dremel tool to shape airbox interior and front vent
The process involves with replacing the intake tube, air filter, removing airbox interior ribs, and installing an air tube. The pictures should be self explanatory.
Stock lid before The Comptech Icebox lid would probably work even better
Stock lid after I only remove the large cross bar
Bottom before
Bottom after I removed as much plastic ribs as possible to create a larger space
Air tube comparison 04/05 on the left. The slightly larger dia. 06 on the right
Some basic testing results
- The post mod with stock air filter has lowered the intake temp slightly when comparing to a completely stock setup.
- Throttle response with stock air filter and stock air tube seemed slightly sluggish when comparing to the K&N CAI.
- Throttle response with K&N drop-in filter and 06 air tube is actually pretty good, and very close to the K&N CAI.
- The air intake temp is about a few degrees warmer than the K&N CAI setup.
- Interior sound level is quieter with the stock intake mod at various rpm range and throttle inputs.
- Sorry, no dyno for this one.
Trending Topics
#10
Originally Posted by TSX2345
Jtso: Which dremel bits did you use? Some of those angles and areas look tough any tips for those that would like to do this?
#13
Use all 3 Pedals at once
Originally Posted by afici0nad0
i've already done the resonator delete. might as well look into this.
in addition to the crossbar, how about shaving the remaining ribs?
in addition to the crossbar, how about shaving the remaining ribs?
Please enlighten me
#16
Rep'n Taxbrain.com
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Looks nice!
Do you notice any difference in low power in this setup vs. the K&N CAI?
Since you're looking for stuff to work on for the winter ....Are you still working on a rear upper strut tie bar or something similar?
Do you notice any difference in low power in this setup vs. the K&N CAI?
Since you're looking for stuff to work on for the winter ....Are you still working on a rear upper strut tie bar or something similar?
#17
Driver/Detailer
Originally Posted by TSX 3Pedal
I don't really understand the reason for shaving off the ribs...is it just to increase the air volume inside of the air box by a miniscule amount?
Please enlighten me
Please enlighten me
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Leo06 (04-14-2023)
#19
She said: it's GINORMOUS!
good work w/pics jtso!
my friend engineered this mod a year back, he basically stick it on a vise and dremel and file down the ribbs on the air box, then installed it back w/o the resonator.
my friend engineered this mod a year back, he basically stick it on a vise and dremel and file down the ribbs on the air box, then installed it back w/o the resonator.
#21
Originally Posted by TSX2345
Any chance I can borrow the flex shaft?
Or can I swap bottoms? You send me the dremeled one and I'll send you mine
Just out curiousity
Or can I swap bottoms? You send me the dremeled one and I'll send you mine
Just out curiousity
#22
Originally Posted by JTso
The 06 TSX seems to benefit from bigger TB, valves and intake tube, so I guess it can't hurt to match it with the larger Icebox lid.
#25
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Originally Posted by K24tunr
What is the difference in size between the 06 vs. 04/05 intake tube?
04/05 has a 60mm TB
06 has a 64 mm TB
So the 06 has a larger tube to fit the larger TB
#26
Originally Posted by outersquare
you should use a velocity funnel at the front end of the pipe
http://www.racerpartswholesale.com/naca.htm
#27
Port & Polish Everything
Originally Posted by JTso
I thought about connecting the pipe inlet to an air duct and mount in in the spoiler vent. Just need to find the proper size duct.
http://www.racerpartswholesale.com/naca.htm
http://www.racerpartswholesale.com/naca.htm
you of all people not having one already.
these are all 3" pipe ones, but i'm sure you can find other sizes;
http://www.k20a.org/forum/showthread.php?t=18692
this one you can go to pepboys and buy, 3" also
spectre
#28
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I ordered some parts today to do this mod.
I got a K&N drop in from summit, 3" dia piping from eBay, and a velocity funnel.
I got a K&N drop in from summit, 3" dia piping from eBay, and a velocity funnel.
#30
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Originally Posted by Reach
What's the K&N part # again? Maybe a link to it on summit?
#31
Originally Posted by outersquare
you of all people not having one already.
these are all 3" pipe ones, but i'm sure you can find other sizes;
http://www.k20a.org/forum/showthread.php?t=18692
this one you can go to pepboys and buy, 3" also
spectre
these are all 3" pipe ones, but i'm sure you can find other sizes;
http://www.k20a.org/forum/showthread.php?t=18692
this one you can go to pepboys and buy, 3" also
spectre
http://www.knfilters.com/search/prod...x?Prod=RX-4870
#32
Port & Polish Everything
Originally Posted by JTso
Actually, I have been using another filter for my K&N CAI setup which has a similar front inlet like the shape of the velocity stacker ring. I wonder what kind of improvement the ring has for the TSX.
http://www.knfilters.com/search/prod...x?Prod=RX-4870
http://www.knfilters.com/search/prod...x?Prod=RX-4870
I'm pretty sure the velocity stack/funnel is significant, an open pipe like that is almost certainly some amount of turbulent condition. I'm sure you've seen on race cars/open individual throttle bodies, they all have velocity funnels.
#35
Port & Polish Everything
Originally Posted by JTso
I might just have to get the ring and try it out then.
http://en.wikipedia.org/wiki/Velocity_stack
It says it's worth a 10% improvement in flow versus an open pipe. Not incredible, but at the same time, fairly easy 10% to pick up also.
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Leo06 (04-13-2023)
#37
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My airbox lid ('05) doesn't look like the above photos, from what I recall. One of these days, I need to take a photo of it.
How much does the '06 intake tube cost? I assume you'd have to order it through a dealer (online, at least). With the difference in size, any problem making it fit onto the smaller TB?
I was entertaining this idea: instead of just replacing the resonator with a chrome pipe, such as in the original post, I'd like to try to connect the stock inlet back to the airbox. (Basically, just taking the resonator out of the loop.) This way would keep the longer tube and have a high inlet to, hopefully, reduce chance of hydrolock. I took a quick look, and couldn't see exactly what parts I should get; I need more time to fiddle with it.
How much does the '06 intake tube cost? I assume you'd have to order it through a dealer (online, at least). With the difference in size, any problem making it fit onto the smaller TB?
I was entertaining this idea: instead of just replacing the resonator with a chrome pipe, such as in the original post, I'd like to try to connect the stock inlet back to the airbox. (Basically, just taking the resonator out of the loop.) This way would keep the longer tube and have a high inlet to, hopefully, reduce chance of hydrolock. I took a quick look, and couldn't see exactly what parts I should get; I need more time to fiddle with it.
#38
Driver/Detailer
Originally Posted by vidgamer
I was entertaining this idea: instead of just replacing the resonator with a chrome pipe, such as in the original post, I'd like to try to connect the stock inlet back to the airbox. (Basically, just taking the resonator out of the loop.) This way would keep the longer tube and have a high inlet to, hopefully, reduce chance of hydrolock. I took a quick look, and couldn't see exactly what parts I should get; I need more time to fiddle with it.
#39
Burning Brakes
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I think I remember -- you were able to re-use the stock tubing, once you sealed up a couple of holes or some such?
Sounds like you don't think that mod was worth doing.
I guess I was hoping that keeping the long path would help the higher-end HP, but I'm not sure what to make of the throttle response.
One mod I already made was removing the "cover" on top of the intake (the opening). Yeah, I'm sure it helps keep things from falling in, but it seems very restrictive. Without it, I swear the intake is a bit louder. Maybe that alone is worth 50% of the restriction.
Sounds like you don't think that mod was worth doing.
I guess I was hoping that keeping the long path would help the higher-end HP, but I'm not sure what to make of the throttle response.
One mod I already made was removing the "cover" on top of the intake (the opening). Yeah, I'm sure it helps keep things from falling in, but it seems very restrictive. Without it, I swear the intake is a bit louder. Maybe that alone is worth 50% of the restriction.
#40
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I performed this mod to the bottom of the airbox over the weekend. Noticed a slightly louder growl from the intake.
I also took it a step further and removed all the ribs on the bottom.
It was fairly easy to do
So now my intake set-up is Icebox + K&N Filter + modified bottom
I also took it a step further and removed all the ribs on the bottom.
It was fairly easy to do
So now my intake set-up is Icebox + K&N Filter + modified bottom