Myxal SRI-CAI -Short Ram-Cold Air Intake

Myx · Jun 10, 2019

Ok....I've uploaded my fuel trims. I did look at them about a week and a half ago and they were between -3 and 0. But I didn't want to say anything if they had somehow changed, in which they have. I've only added the addition of the cold-air piece underneath since then. This is interesting to see but this is what it is as of my typing this post right now.

Disregard the 113F for temps. It stays at this temp in Torque Pro. I haven't fixed this issue yet (I have 2018 model).

For those that want to learn a little bit about fuel trims, please read this ~~> Fuel Trim

Ideally, the STFT and LTFT should be within a few percentage points of zero when the engine is idling or being held at a steady RPM. Remember, STFT can bounce around quite a bit as when you suddenly snap open the throttle or decelerate. But LTFT can tell you if the average fuel/mixture is running rich or lean.

Good LTFT values should be as close to zero as possible, though they can range from 5 to 8 percent depending on the condition of the engine. If the LTFT is getting up around 10 percent or higher, it usually indicates a problem that needs to be diagnosed.

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake 2019-6-11 Fuel Trims Myxal SRI

Myx · Jun 10, 2019

2:20am here and I'm still thinking of intake ideas to improve on what I have. So.....here is what I plan on doing tomorrow.

I had concerns about boxing the intake in because it'd be covered on 3 of the 4 sides of the box. Only the bottom part would be exposed just enough for the rectangular cold air funnel to attach to it. I want as much of the filter to be unrestricted as possible. If you noticed on my first post, I have several links on the bottom of it to various articles. I've made this intake based off of the info from these articles, my personal experience with making intakes as well as feedback from the great people here at Civicx.com.

Look at this intake test from Grassroots Motorsports ~~~> What makes the best intake. Look at the attached pictures below from one of the testing that they did.

What you see is a test with the filter mounted to a supercharger with a cardboard box on the side of it as well as the top of it. Even with this cardboard piece covering two sides of the air filter, it made no difference on the air intake flow.

So with this in mind, I'll be cutting up the Myxal CAI box so that the rectangular piece is open on the bottom side of the box and the backside (Side facing the engine) of the box will be wide open. The top of the box and the side of the box where the filter is touching will still have cardboard in place, with aluminum foil wrapped around it. This is so no air from the radiator is directly blowing on the filter itself while it is idle. The air filter will still be exposed to the engine bay but no hot air blowing directly on it from the radiator and into the air filter.

Remember, every little bit counts (or may count). I'll take pics tomorrow (Or later today, depends on how u look at it). Shouldn't be too much trouble to make. Will see!

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake Grassroot Motorsports Intake - 1

View attachment 156796

Myx · Jun 11, 2019

This is not going to look pretty folks.

Toyed with the car this morning and finished off the intake for now. Pics posted below. The open end of the box is to not restrict the flow of air to the filter too much. As I said above, I wanted to wall off the part of the air filter where the radiator fan blows directly on to it. So at idle, yes the engine bay is going to be hot no doubt. However, since the engine isn't sucking in a ton of air idling, a good portion of the heat being blown by the radiator fan can be blown around the air filter. This will help some since the air will constantly be moving. I didn't cover the top portion so much because it's sealed by the hood for one. Two, heat rises so if some happen to be over the air filter at idle (and it will), some can simply move over pass it.

The bottom of the box is open to the PRL piece that is coming out of the foglight.

So for a quick summary!
1) The intake was shortened as much as possible. Turbos like short intakes.
2) The intake immediately opens up as wide as it can to the biggest maf sensor I could use (PRL Race maf). Turbos like wider diameter.
3) After the maf sensor, the biggest air filter I could find was put on. Turbo's like big air filters.
4) Tried to isolate some of the heat blowing on the air filter. Turbo's like cooler inlet air temperatures.
5) The cold air was routed to the foglight area. This area I believe has the highest air pressure coming to it. I can post a pic to demonstrate.
6) The cold air piping is smooth (Using PRL Cobra silicone hose as well as other smooth bending silicone hoses. Air doesn't like sharp bends (slows down) and don't like ridges in the intake (Air slows down again).

So...this is the contraption I have at the moment. If I feel a change would help a little, I'll continue to change it. That's all for now.

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake Myxal SRI - CAI - 1

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake Myxal SRI - CAI - 2

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Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake Myxal SRI - CAI - 5

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake Myxal SRI - CAI - 6

Myx · Jun 11, 2019

Oh yeah, I never utilized the black funnel piece I ordered. It's a little too big to fit in the foglight area. I'd have to remove the bumper to put it on but even still, it wouldn't seem worth it. The PRL hose that is in the foglight is the same size as the foglight area hole that's open. Putting the funnel piece on doesn't look like it will be able to capture any more air since the wider 6" opening would be blocked off by the top and bottom part of the foglight piece. So the air intake portion at the foglight will remain the same. If nothing else, it can't hurt things right? No hydrolocking, etc. Allows more cool air to go directly to the air filter. Can always seal off the box at a later date if I feel like it.

Again, I'm utilizing info I read from one of the links I posted in my first post. This is why I am trying to bring in cold air from the foglight area. This picture below demonstrates where you can expect to see the highest air pressures being generated on a vehicle.

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake 113157_13m

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake Myxal SRI - CAI - 7

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake Myxal SRI - CAI - 8

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake Myxal SRI - CAI - 9

86salmon · Jun 13, 2019

Myx said:
This is not going to look pretty folks.

Toyed with the car this morning and finished off the intake for now. Pics posted below. The open end of the box is to not restrict the flow of air to the filter too much. As I said above, I wanted to wall off the part of the air filter where the radiator fan blows directly on to it. So at idle, yes the engine bay is going to be hot no doubt. However, since the engine isn't sucking in a ton of air idling, a good portion of the heat being blown by the radiator fan can be blown around the air filter. This will help some since the air will constantly be moving. I didn't cover the top portion so much because it's sealed by the hood for one. Two, heat rises so if some happen to be over the air filter at idle (and it will), some can simply move over pass it.

The bottom of the box is open to the PRL piece that is coming out of the foglight.

So for a quick summary!
1) The intake was shortened as much as possible. Turbos like short intakes.
2) The intake immediately opens up as wide as it can to the biggest maf sensor I could use (PRL Race maf). Turbos like wider diameter.
3) After the maf sensor, the biggest air filter I could find was put on. Turbo's like big air filters.
4) Tried to isolate some of the heat blowing on the air filter. Turbo's like cooler inlet air temperatures.
5) The cold air was routed to the foglight area. This area I believe has the highest air pressure coming to it. I can post a pic to demonstrate.
6) The cold air piping is smooth (Using PRL Cobra silicone hose as well as other smooth bending silicone hoses. Air doesn't like sharp bends (slows down) and don't like ridges in the intake (Air slows down again).

So...this is the contraption I have at the moment. If I feel a change would help a little, I'll continue to change it. That's all for now.

Is your current air box fed by the air guide in the hood now that it's open? Does it even matter with your config being fed from the bottom as well?

Myx · Jun 13, 2019

86salmon said:
Is your current air box fed by the air guide in the hood now that it's open? Does it even matter with your config being fed from the bottom as well?

It isn't fed at the air guide. I thought over this over and over gain. What made me not do it is reading from a lot of the folks on here when comparing their intake air temperature (IAT) at the maf sensor with the stock box, it would be much higher than using a CAI (Like the PRL). I'm talking 20F-30F higher with the stock air box vs a CAI. So, the air is warm/hot at this location when coming off idle. If you take a close look at it, you can see a gap right here that goes down to the radiator area and the radiator fan blows right into the stock intake hole.

It doesn't matter since I'm feeding it cool air from the fog light though (while moving). I've let the car sit several times since installing this airbox. The front of the box gets pretty warm, where the air blows directly onto it. The back side where filter is exposed is either not very warm or simply cooler to the touch. And this is with the hood closed. Better to look at IATs while idling but my Torque Pro can't read that yet. And my laptop with Ktuner on it sucks and dies quickly (It's VERY old).

When I get back to the track, I'll be paying close attention to my 60ft times. I think using a pure short ram intake, the air blowing directly onto the air filter was affecting my 60ft times more than the filter simply sitting in the engine bay. I hate to just think though so I need to test this out.

Myx · Jun 14, 2019

Just got off nightshift and am eating breakfast. Been staring at this box with the slightly smaller air filter inside. ***Sigh***

Gonna make the Myxal a fully enclosed SRI-CAI and test it out tonight at the dragstrip. The open box contraption above is bothering the hell out of me.

Despite this filter being fully enclosed, I can rotate my hand fully around it inside the box. Also it's a 4" air filter with a 4" tubing going out the foglight. Shouldn't hurt being attached to the small stock TIP (Turbo Inlet Pipe) right?

Will take pics before heading out later.

Another thing that has been eating away at me is my 60ft times while I had the open SRI on. I was looking through all the 1/4 mile times in this forum, the SI forum as well as the Type R forum. For the most part, people who have been getting good 60ft times were doing it on the stock intake or a CAI (Ex: PRL Cobra CAI). Very few did so with an SRI, if any. There's gotta be a connection here. Perhaps the hot air being sucked in at idle is more relevant than not, while accelerating from a dead stop.

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake 20190614_061919

Myx · Jun 14, 2019

I took quite few pics so you can see how I did this from start to finish. This is what I originally envisioned. Now it's done. I'm off to the tracks in a few hours. I have no expectations as usual. This is all in good fun and something I enjoy doing.

Track conditions will be similar tonight as my best time so far in my signature. The ONLY difference then was I was using the Myxal SRI, which was fully exposed the engine bay heat. This intake is totally isolated off. I'll be paying particular attention to my 60ft time and trap speed. Unfortunately, there is an event tonight where they will not be prepping the track. So, the street tires I have will be even less sticky than they could be at a dragstrip. The good news is whatever I run, I can expect my car to run like this on the street. I mean...it's a CVT right? CVTs are SLOW!

I have NO EXPECTATIONS! I just like making intakes, run the numbers at the drastrip and report back. I've always heard the hearsays and that intakes won't make power, etc, etc. It is what it is. I'll report back.

The official Myxal SRI-CAI is done.

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake 20190614_123331

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Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake 20190614_131753

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake 20190614_131737

Myx · Jun 14, 2019

I just arrived at the track. Went through tech inspection and ran the car. All tire pressures were at 52psi (Oops....I checked after I ran) and I loss some traction during take off (Excellent lowend).

I ran a [email protected].

I'm +10f warmer than when I recently ran 13.7's/13.8's a couple weeks ago. The only change was making this Myxal SRI a SRI-CAI. And they say an intake makes no power.

Remember....this is a CVT. With only changes to the intake, downpipe and Ktuner (With a TSP Stage 1 Beta test tune).

Gonna let the car cool off for 30-45 minutes. Adjust my tire pressures off advice from folks in here and enjoy the night. Will post any updates in the 1/4 forum and here.

@dallasjhawk Man...this is what I was trying to tell u way back before I got this car in the 1/4 mile forum. It's not even cold out yet. The secrets to the CVT. Hehe!

@maddmatt02 The curse has finally lifted. For now.

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake 20190614_181315

Myx · Jun 14, 2019

Well peeps, it looks like everything went well tonight. I've posted my new 1/4 mile time in the 1/ 4 mile thread and the 1/4 mile ticket is in my signature. [email protected]. The only change I've made is this intake that you witnessed me making in this thread. I'm not going to say this intake is the cause for me getting a better 1/4 mile time. I don't have too...... I'm never one to argue. I just post the results.

I want to mention something I observed though. My 1/4 mile times got progressively worse while I was testing. Went from 13.6, 13.6, to 13.8...13.9. I stopped and let the car cool off. Here is what I noticed.
1) The intake box was cool to the touch. As well as the cold air piping leading up to it.
2) The maf sensor was HOT. So hot, I could not keep my fingers on it for more than a second or so.
3) The turbo intake pipe (TIP) was also very hot. I could hold my fingers on it for maybe a second or two more than the maf sensor itself.
4) The piping from the turbo outlet to the intercooler was not too hot to touch. I could keep my fingers on it. :dunno:

So.....I'm not done with this intake yet.
What's the plan?

1) I need to redirect the hot air that is blowing/getting directly on the turbo inlet piping and maf sensor. I will post up how I will go about doing this. One of the things I'll be utilizing is the info from the Stock Modified Cold Air Thread. I'd like to take it one step further than what some of the great folks in this thread has done. I'll update as I do it. Stay tuned!

That's all for now. Sitting directly in the quickest (Not fastest) stock Type R 1/4 mile territory. Can't complain! This is a CVT.

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake 13-6-2

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake 13-6 times

PowerPerLiter · Jun 14, 2019

Myx said:
Well peeps, it looks like everything went well tonight. I've posted my new 1/4 mile time in the 1/ 4 mile thread and the 1/4 mile ticket is in my signature. [email protected]. The only change I've made is this intake that you witnessed me making in this thread. I'm not going to say this intake is the cause for me getting a better 1/4 mile time. I don't have too...... I'm never one to argue. I just post the results.

I want to mention something I observed though. My 1/4 mile times got progressively worse while I was testing. Went from 13.6, 13.6, to 13.8...13.9. I stopped and let the car cool off. Here is what I noticed.
1) The intake box was cool to the touch. As well as the cold air piping leading up to it.
2) The maf sensor was HOT. So hot, I could not keep my fingers on it for more than a second or so.
3) The turbo intake pipe (TIP) was also very hot. I could hold my fingers on it for maybe a second or two more than the maf sensor itself.
4) The piping from the turbo outlet to the intercooler was not too hot to touch. I could keep my fingers on it.

So.....I'm not done with this intake yet.
What's the plan?

1) I need to redirect the hot air that is blowing/getting directly on the turbo inlet piping and maf sensor. I will post up how I will go about doing this. One of the things I'll be utilizing is the info from the Stock Modified Cold Air Thread. I'd like to take it one step further than what some of the great folks in this thread has done. I'll update as I do it. Stay tuned!

That's all for now. Sitting directly in the fastest stock Type R 1/4 mile territory. Can't complain! This is a CVT.

Told yall about the maf sensor itself being heat soaked by the cooling fan!

Myx · Jun 15, 2019

PowerPerLiter said:
Told yall about the maf sensor itself being heat soaked by the cooling fan!

Being heat soaked from a cooling fan. Oxymoron ain't it?

You were so right man. The maf sensor was really, REALLY HOT. And it's not like it is 90+ degrees outside. Will work on this tomorrow if I can as long as the Misses doesn't keep me occupied. I'm actually wondering if the heat soaking is causing the maf sensor readings to read hotter than it should be, and affecting the tune in general (Ignition timing, fueling, etc). It really doesn't seem like a coincidence since post turbo piping was cooler than the maf sensor, after I let the car sit for a bit.

Myx · Jun 15, 2019

Just finished gold wrapping the maf sensor. I have never done this stuff before so bear with me if it looks ghetto.

Edit: Just added another pic. I even gold wrapped the silicone coupler that attaches to the maf sensor. Because I have mental issues. :crazy:

Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake 20190615_091439

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PowerPerLiter · Jun 15, 2019

The crappy part is its being heated by convection (air contact from fan) as well as radiant heat from the radiator hoses, downpipe, etc.

Myx · Jun 15, 2019

PowerPerLiter said:
The crappy part is its being heated by convection (air contact from fan) as well as radiant heat from the radiator hoses, downpipe, etc.

Indeed! That's why I plan on approaching this in two stages (Maybe 3 if I purchase an aftermarket grill, which I probably will).

Gold wrapping the maf sensor and the turbo inlet pipe is stage one.

Just finished gold wrapping the turbo inlet pipe (TIP). Like I said, not professional looking but it's for function only. This was a bit challenging, trying to gold wrap underneath the TIP. It's tight under there so if you plan on doing this, you are gonna have to figure out a technique that works best for you. I ran my fingers underneath it as best as I could to make sure the gold wrap was all the way around. If you do this, do the best you can. Every little bit helps.

Now to figure out how I want to do this......Stage 2 I was talking about above.

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Honda Civic 10th gen Myxal SRI-CAI -Short Ram-Cold Air Intake 20190615_110507

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