EPA Mileage rating change from 2023 to 2024 CX-5?

[AL Cx5]

Ok. They make sense if there are any sharp bends (close to 90°). The fabrication and installation of them at those points could be tricky.

I'll see how difficult. My friend made his TVS from landscape edging material on his gas burners. I have a sheet of light guage aluminum I'll try first.

I'm going to log my test loop with the CX 5 and see if the data will overlay like my 5.9 CTD. I'll start with testing a cylinder head grounding first, then move on to TVs.

On the list is to play with spark plug gap. I ordered a set of plugs to do a WOT pull, shut down and read the plug. Then try a few plug gap settings.

 

[zhoom-zhoom]

Sensible driving habits have greater impact than 1 MPG.

 

[AL Cx5]

Sensible driving habits have greater impact than 1 MPG.

X2 driving habits up to 30% difference in FE. Long haul truckers get a bonus based on fuel used. Their records show a 30% difference in fuel used based on driving habits.

 

[chickdr]

Pretty impressive - 31.5MPG with a 2.5T. My computer lists 23.6MPG over the last ~10k miles. I rarely get better than this, even on the highway (maybe 25-26 MPG at times).

 

[AL Cx5]

Pretty impressive - 31.5MPG with a 2.5T. My computer lists 23.6MPG over the last ~10k miles. I rarely get better than this, even on the highway (maybe 25-26 MPG at times).

Thanks, cc on and stayed under 70 mph, grounds on the cylinder head, 30% lighter wheels, sway bars, premium fuel and DRTuned ecu all contribute.

While tuning with DRTuned, I put a new spark plug in #4 hole and did 2 wots then pulled over and removed the plug. I put the original plug back in.

Took pics and sent to DRT. I could see the timing mark on the plug ground strap was near the tip. With this info, I requested more timing. Next revised tune was a noticable bump in power. More torque steer at WOT. I did another spark plug read and it moved the timing down the ground strap. Also NO signs of engine knock on the plug. So I requested 1 more degree of timing. This should move the timing line about midway down the plug. Not racing this car, so will be conservative on timing.

A tuner cannot tell from a log if the engine can take more timing. Some keep adding timing until the knock sensors pick up detonation. Reading a plug and looking at the logs is the safest way to optimize an engine.

I also requested LESS throttle response from idle. The first tune increased throttle response. DTR turned it down abot 10%. This increases FE as well. This is my wife's DD, she didn't like the throttle response turned up.

 

[zhoom-zhoom]

Pretty impressive - 31.5MPG with a 2.5T. My computer lists 23.6MPG over the last ~10k miles. I rarely get better than this, even on the highway (maybe 25-26 MPG at times).

Certainly impressive if you don't plan on keeping the vehicle for the long haul. The fuel savings now will be negated when the turbo engine has problems.

 

[N7turbo]

I learn something new about our CX 5 every day! I'm so happy not having i Start and CD!!

Here is a pic of 5.9 CTD turning vanes normally mounted in the elbow at the turbo air inlet. I picked up a second set of TVs and mounted in the first elbow in the TIP. Cummins/Ram did a nice job designing these TVs.

This is a graph of engine load over the same course. LESS engine load means the engine is more FE. We also confirmed the TVs hand calculating fuel mileage. Two other guys I know of did this mod and confirmed their fuel mileage increased. Some noted more low end toque. Honestly I can't feel much difference on a +600 torque at 1600 rpm, 6500 pound vehicle...

I'll make a sheet metal, one blade, TV for the Mazda's TIP soon.

For those how like to dive into the details, TVs have been around a long time in commercial and industrial HVAC systems.
https://www.amca.org/educate/articl...t-to-optimize-fan-performance-efficiency.html
View attachment 327893

I have a section of interstate I run on CC at 55 MPH. Terrain changes enough to give a decent partial throttle test as you can see. I'm not interested in WOT data on my DD. On my drag race car, yes ONLY WOT. LOL

A CTD friend built sheet metal TVs for a gas burner and found measurable gains at partial throttle.

View attachment 327892

As I installed the new turbo inlet pipe over the weekend I noticed how the bend in the silicone hose could use turning vanes because it is a 90° (or slightly more) turn. However, I'm wary about putting something in there that isn't designed just right to not create a restriction which cancels out the effect.

 

[shooter357]

When one of you engineers get an increase of 30% or better mileage let me know!

 

[N7turbo]

When one of you engineers get an increase of 30% or better mileage let me know!

No problem

 

[AL Cx5]

As I installed the new turbo inlet pipe over the weekend I noticed how the bend in the silicone hose could use turning vanes because it is a 90° (or slightly more) turn. However, I'm wary about putting something in there that isn't designed just right to not create a restriction which cancels out the effect.

You are thinking like myself and many of the Cummins Turbo Diesel guys were thinking. We REMOVED the turning vanes that Cummins spent considerable amount of time designing thinking we were improving our FE! It has been proven time and again these TVs improve FE.

I ran my CTD with and without, logging eng load, over my test loop. I found a nice bump in FE. Others have confirmed doing real world tests.

I did not do any WOT tests. WOT on a tuned Cummins turbo dieseltr makes a boat load of torque and can, has, harmed the trans. I have that T shirt...ugh With that said, at WOT no TV might be better.

This follows the pattern of testing CAIs and maybe Turbo Inlet Pipe. At partial throttle their may not be any or very little gain.

Latter, several of us added TVs in the first 90 in the Cummins TIP. This was a 90 was before a device partitioned into fourths. Again, we had removed this item thinking it was restrictive, NOT. AND we say a nice gain in FE at partial throttle with the added, MORE restrictive TVs.

One of my Cummins FE nerd friend, added TVs to the inlet of his gas burner truck. He measured gains in FE/Power with this set up.

If you are STILL reading, I believe it's worth experimenting with our T 2.5l. The TIP is a piece of ..... forum will slap my hand. Lets say use a piece of WORK.

If one is adventurous, then get out the tin snips and make some TVs and set some parameters of what would be success. For me partial throttle to 2500 RPM is most important. WOT may be what may be another persons measurement for success.

This falls into the category of adding ground cables to the cylinder heads.

 

[N7turbo]

You are thinking like myself and many of the Cummins Turbo Diesel guys were thinking. We REMOVED the turning vanes that Cummins spent considerable amount of time designing thinking we were improving our FE! It has been proven time and again these TVs improve FE.

I'd be fine with a single, large TV in the center. But it needs to be stout to help with peace of mind that it's never going to get sucked up. How is it affixed?

Actually, maybe just 3D print a tube with the right dimensions with the TV built in. Now to find someone who can do it...

 

[AL Cx5]

I'd be fine with a single, large TV in the center. But it needs to be stout to help with peace of mind that it's never going to get sucked up. How is it affixed?

Actually, maybe just 3D print a tube with the right dimensions with the TV built in. Now to find someone who can do it...

I'll get my OEM TIP apart and come up with some ideas. Ecomodders have been doing this for awhile and my friend who made TVs for his gas burner truck can all provide ideas...

Ideally, offset the TV so less air builds up on the outer radius.

I'll get into this in a week or so when I can work on the car a few hours. I'll log my test loop without TVs for a baseline.

Here some basic info.

https://buildingengineer.wordpress....ary-component-or-efficiency-reduction-device/

 

[N7turbo]

The outer bend actually isn't that extreme, but the inner one is. Here is mine.

But since creative juices are flowing, the best intake setup would be to skip the air box altogether, and pipe the TIP + MAF straight into the snorkel, with an inline filter. Would take a bit more engineering and modification of the snorkel though.

 

[propflux01]

Thanks, cc on and stayed under 70 mph, grounds on the cylinder head, 30% lighter wheels, sway bars, premium fuel and DRTuned ecu all contribute..............

What was the purpose of these, and how did they help?

 

[N7turbo]

The outer bend actually isn't that extreme, but the inner one is. Here is mine.

View attachment 328989

But since creative juices are flowing, the best intake setup would be to skip the air box altogether, and pipe the TIP + MAF straight into the snorkel, with an inline filter. Would take a bit more engineering and modification of the snorkel though.

Looking inside the airbox:

It's not the most restrictive thing I've ever seen, but we're still talking about a few bends that could be eliminated. I count after the snorkel 4 times the air needs to change direction, 5 if you include the pipe going to the TIP. Ideally, that would be 0. If you could package a snorkel->filter->MAF->TIP arrangement you could achieve that. The filter would no doubt need to be smaller, and changed more often. Kudus to Mazda and their filter, it is massive and should last a whole 3-year lease period.

 

[AL Cx5]

What was the purpose of these, and how did they help?

Here is the link. Read to the end before you decided.

I suggest 2 grounds, one near #1 and #4 cylinders. With the lights and ac fan on high I've measured 20.0 Amps through these 4awg grounds. I noticed another bump in performance after adding a 2nd ground.

https://mazdas247.com/forum/t/grounding-cylinder-head-test-results-2024-cx-5-turbo.123881182/

 

[AL Cx5]

Looking inside the airbox:

View attachment 329012
View attachment 329013
It's not the most restrictive thing I've ever seen, but we're still talking about a few bends that could be eliminated. I count after the snorkel 4 times the air needs to change direction, 5 if you include the pipe going to the TIP. Ideally, that would be 0. If you could package a snorkel->filter->MAF->TIP arrangement you could achieve that. The filter would no doubt need to be smaller, and changed more often. Kudus to Mazda and their filter, it is massive and should last a whole 3-year lease period.

This tip hurts my head. And we thought our 5.9 and 6.7 Cummins Tips were restictive. I'm sure Mazda considered other locations for the turbo. Our Cummins turbo are mounted on the exhaust side as well. Being an inline 6, there was room for a straighter shot for the tip.

For now, I'm concentrating on TVs and see if we can measure any FE gains. Going for the low hanging fruit....

Fwiw, I replace air filters every oil change. I ran the number on my Honda and Ram, if they got less than .5 mpg better FE its a wash. And it's nice to see Mazda put a big filter on these cars.

Btw, we tested CAIs on our Cummins. At partial throttle and up to modified 500 HP wot they are equal to the CAI. And have superior filtering. Guys go over 500k miles on this engine. There is a million mile club. One reason in the excellent filtration.

Another plus for Mazdas!!

 

[yrwei52]

⋯ I'm going to probably buy a 2023 used with low miles to replace my 2021 Carbon that was totaled - guy ran a red light and t-boned it with my wife driving. She's fine, I wasn't there. Got a check and in the hunt.

Glad your wife is fine in the accident.

Hope you eventually got a 2024 CX-5 with an “L” at the 8th digit in the VIN.

For many 2024 CX-5’s Mazda has been offering the 2.5L NA without cylinder deactivation which is problematic. Make sure to get one without CD.

Buy the 2024 CX-5 NA to avoid cylinder head crack issue?

... NOTE: To identify vehicles with cylinder deactivation, examine the (HENRY THE) 8th digit of the VIN.
• L(ove): 2.5L without cylinder deactivation
• M(isery): 2.5L with cylinder deactivation ...

I've got it programmed in my brain now as:

Henry the EIGHTH, LOVE // MISERY

Haha

 

[AL Cx5]

Glad your wife is fine in the accident.

Hope you eventually got a 2024 CX-5 with an “L” at the 8th digit in the VIN.

For many 2024 CX-5’s Mazda has been offering the 2.5L NA without cylinder deactivation which is problematic. Make sure to get one without CD.

Buy the 2024 CX-5 NA to avoid cylinder head crack issue?

Yikes,T boned....

I've become that old guy who creeps forward through an intersection. My wife narrowly avoid a car that never slowed down, running a red light last week..



Mazda was running zero interest financing in January for 5 years. This sealed the deal on a 24.

Turbos don't have CD, larger front brakes and beefed up trans.