Coupland, TX · Dynojet 224xLC
Real data, real gains. Dyno testing and custom tuning forty minutes east of Austin, in Coupland, Texas. Every change is measured on the rollers, and the printed run sheet goes home with you.
Master Technician
Owner operated, former instructor
Dynojet 224xLC
Eddy-current load control, 2WD
GM LS & LT
House specialty
Auto Medic Repair
Full-service automotive partner
Services
In the order people actually book them. Calibration is the core of the shop; the rest exists because a tune is only ever as good as the hardware underneath it.
From $250
Three to four runs on a Dynojet 224xLC, with the run sheet to prove what the car actually makes.
Optional $75 vehicle inspection add-on: OBDII scan, tires, brakes, engine, transmission and driveline.
What a session includes for Dyno SessionsFrom $250/hr
Fuel, spark, boost and torque management written for your engine. GM LS and LT is the house specialty.
How the calibration works for Custom ECU TuningQuoted per build
Camshafts, cylinder head porting, turbo upgrades and superchargers, then calibrated in-house.
Inside a build for Engine Blueprinting & Performance BuildsThe dyno
The graph above is a real session: a Mercedes-Benz E55 AMG, three consecutive pulls, published with the air temperature and humidity they happened in.
That broad plateau is what a supercharged M113K should look like, with boost climbing alongside engine speed rather than waiting on exhaust energy. Every figure is measured at the wheels, because a chassis dyno cannot measure anywhere else.
510.6hp
Peak, at the wheels
586.9lb-ft
Peak torque
SAE1.05
Correction
3pulls
Same session
| Pull | Peak HP | @ RPM | Peak lb-ft | @ RPM | Air temp | Humidity |
|---|---|---|---|---|---|---|
| Run 01 | 510.64 | 5,620 | 586.92 | 3,240 | 91.62°F | 61.47% |
| Run 02 | 478.42 | 5,200 | 571.31 | 3,410 | 91.63°F | 61.47% |
| Run 03 | 498.75 | 5,180 | 583.75 | 3,300 | 92.52°F | 58.59% |
Pricing
Published because a shop that will not put a starting number on a session makes you ring up to find out whether you can afford it, and most people just do not ring.
from$250
Three to four runs on the rollers, with the printed run sheet to take away. The most common reason people book.
from$250/ hour
Dyno time is included in the hourly rate, not billed on top of it.
add-on$75
Optional, on top of a session. OBDII scan plus tires, brakes, engine, transmission and driveline condition. Carried out at the customer's own risk.
from$50/ credit
License credits that unlock write access to your ECU. Charged separately because the count depends on the vehicle (typically 2 to 20).
The shop
Our founder, Jeffrey Alexander, began his automotive career washing cars in a dealership bay. Years of hands-on work and training later he became a Master Technician, then took what he knew into the classroom, teaching automotive students the science of engine efficiency and real-world power production.
When the opportunity came to open a dedicated performance facility in Coupland, Torque Theory took its next leap forward. With a professional dynamometer installed, horsepower and torque stopped being things the shop talked about and started being things it measured.
Today Torque Theory has joined forces with Auto Medic Repair to offer a complete automotive solution: precision tuning and dyno testing alongside everyday repairs, maintenance and tune-ups, from one address.
The facility
The Dynojet 224xLC is not a rented hour somewhere else. It is installed here, in concrete that was cut, formed and poured for it, which is the part nobody photographs and the part that decides whether a number repeats.
In their words
7 reviews on Google.
Reasonable price
Great job dude. Thanks for boost! GTA 6 💪🏾!!
Jeff is easy to work with, and accommodating. Will come back for another dyno day!!
Jeff and his team did a great job with my Camaro. Very fine tuning down to the last detail. Will be using Torque Theory for all my other hot rods/daily drivers.
Jeff is knowledgeable and handy! He def knows what he’s doing. If you want a tune up or need some extra hp.. hit this man up
Had a great experience with Torque Theory! Jeffrey was extremely knowledgeable, honest, and took the time to make sure everything was done right. You can tell he genuinely cares about the cars and the people he works with, not just getting you in and out. The dyno/tuning process was professional and thorough, and I was really impressed with the results. Everything was explained clearly, and I felt confident knowing my vehicle was in good hands. If you’re looking for a tuner who knows their stuff and actually cares about doing quality work, I definitely recommend Torque Theory. I’ll absolutely be bringing my vehicle back and wouldn’t hesitate to recommend them to other enthusiasts in the area. 🔥🏁
Baseline pull, honest assessment, and a straight answer about what the next step is worth. No packages you did not ask for.
