OMG! Tier 2 Tune 280 HP 360 lb ft torque at the Wheel! Hold On!

[AL Cx5]

Here is MazdaEdit calculated street dyno today with Tire 2 and No revisions.

I'll send in the log file and get a revised tune in a week or so and see how it compares.

IF we assume a 20% HP loss through the drivetrain:
FWHP 365 and a gain of 81 % gain over stock on premium fuel
FW Torque 488.75 and a gain of 100 % over stock turbo on premium fuel

At this point, my focus on the remaining revised tunes is to improve drivability. Since I paid for reduced throttle response as a DD we will work on smoothing this out. The present tune behaves very nicely in stop and go traffic, merging and in parking lots.

FE seems equal or better than T1. T1 gets up to 33 MPG highway. It's easy to get 25 to 26 MPG in town.

This car is definitely a SLEEPER. Still a fun sport SUV. It's making about 0.099 HP/ pound curb weight. Not in Hotrod territory. A stock, Dodge NA 6.4L makes .114 HP/ pound curb weight and gets 23 MPG highway.

Okay, let's look at some of the Hot SUVs that a Tuned CX 5 T should handle with ease...

Porsche Macan, 434 HP, Curb Weight 4451# or 0.096 HP/#
BMW X3 M50, 393 HP, 4334 # or 0.087 HP/#
Mini Countryman JCW, 312 HP, 3635 to 3743 curb weight or 0.087 to 0.084

 

[N7turbo]

What parameters (drag coefficient, frontal area, gear ratios, etc) are you using?

 

[AL Cx5]

What parameters (drag coefficient, frontal area, gear ratios, etc) are you using?

Well, I didn't change these parameters. I used Mazda 3 parameters. I know my CX 5 is much less aerodynamic. I used the Mazda 3 gear ratios as well.

I used 3860 curb weight +200 pounds for driver, car seats, tools and such. I had just filled up with fuel and had less than 10 miles since fill up.

So with more drag from aero and front area, my HP and Torque are skewed. If I changed these values the power would be higher. And not by a whole lot. Aero comes into play from about 50 mph and up. I believe my top speed was 58 mph....

AND this is an estimate. We always say dynos LIE but the track DON'T. At this point, I'm not willing to take this car to a drag strip.

An idea test would be to make a pass on a drag strip, Stock, T1 and T2. Over in the domestic world we just that and post it...

I'm looking forward another early adopter to load Tier 2 in the CX 5 T and give us another data point......

 

[AL Cx5]

I plugged the engine displacement, rpm, boost into a HP Torque calculator as a check.

This is a good check for the "dyno" graph! It is nice to have at least a 2nd or more check on all HP/Torque numbers. It assures us that it is indeed possible that 2.5l engine at 4200 rpm, 32 PSI boost can make these numbers!

 

[N7turbo]

32 PSI boost

Damn dude, it is time for an upgraded intercooler!

 

[AL Cx5]

Damn dude, it is time for an upgraded intercooler!

If we were racing we would upgrade the intercooler and other items.

This is my wife's grocery getter. It's gas PLENTY of pep for her. I was a bit on edge driving tonight on wet roads. That was until I put my foot in it with no traffic around, I overpowered traction control. It handled predictably.

When you get T2, I hope you upgrade your intercooler and a few other items to get the full potential of your 2.5T!

AND what would it it be like if the wastegate didn't start opening and we ran it up to 6000 or 7000 RPM!

There is SO MUCH more potential for this engine. It already has forged crankshaft and rods.

Anyway, I'm happy with our BMW and Porsche killer!