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Corona, CA · In our shop

Dyno testing

Measurement without calibration. Find out what the car actually makes, under conditions we publish.

IMPORTANT - ASSUMPTION OF RISK & RELEASE OF LIABILITY

I understand that dyno testing, custom or remote tuning, ECU/TCU flashing, datalogging, road testing, performance modification, and related services can place substantial stress on a vehicle and can expose, accelerate, or cause mechanical, electrical, drivetrain, tire/wheel, module/ECU, or other failures, including catastrophic failure, property damage, fire, loss of use, injury, or death. I represent that I own the vehicle or am authorized by its owner, have disclosed known defects and modifications, and voluntarily assume these risks.

For remote tuning, I accept the risks of inaccurate information, hardware/software incompatibility, interrupted flashing, communication or power loss, ECU/TCU corruption or “bricking,” recovery/towing costs, and Customer-controlled datalogging. I will operate and test the vehicle only safely and lawfully.

TO THE FULLEST EXTENT PERMITTED BY LAW, I RELEASE AND WAIVE CLAIMS AGAINST FASTUTV LLC D/B/A DEFI MOTORSPORTS AND ITS OWNERS, EMPLOYEES, TUNERS, TECHNICIANS, AGENTS, CONTRACTORS, AFFILIATES, AND INSURERS ARISING FROM THE INHERENT RISKS OF THE SERVICES OR THEIR ORDINARY NEGLIGENCE IN PERFORMING THE AUTHORIZED SERVICES.

I understand that DEFI does not guarantee horsepower, reliability, component life, drivability, emissions compliance, warranty coverage, or any particular result. I am responsible for legal/emissions compliance and for stopping vehicle operation if warning signs or abnormal conditions occur. This release does not waive liability or rights that applicable law does not permit to be waived. I have reviewed and agree to the full DEFI Motorsports Dyno Testing, Tuning & Performance Services Agreement, which is incorporated into this purchase/authorization.

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(951) 405-4465

$350 per hourThree pulls and the full sheet

The DEFI Motorsports shop floor in Corona, California

Why you would book this

To establish a baseline before a build. To verify what a previous shop delivered. To settle an argument. To check whether a part did what it claimed. All of those are measurement problems, not tuning problems.

A hub dyno matters more here than anywhere else: because the measurement does not pass through the tire, the same car measured on two different days lands in the same place. That repeatability is the entire product.

What you get

Three pulls, the full sheet, and every condition that could move the number written on it. If we correct the data we tell you to which standard. If your car makes less than someone told you it would, the sheet will say that too.

If the sheet says it is leaving power on the table

Then the car is already on the hubs. DEFI Custom Tuning is $500 on top of the session, plus licensing — and on a factory ECU the RTD4 supports, the $350 RTD4 the calibration is delivered on. You only decide after you have seen the number, and only if the number makes the case.

What is included

  • Hub mounting
  • Three verification pulls
  • Ambient conditions logged per run
  • Full sheet with correction factor stated

What to bring

  • A mechanically healthy vehicle
  • The fuel you want measured on
  • Any previous dyno sheets you want compared

Measure it — then tune it, if the number makes the case

Dyno Performance Test

$350

  • Mainline dyno session$350

Horsepower and torque measurement, a baseline before a build, or proof of what a part or a previous tune actually did.

Book dyno testing
Recommended · best value

Complete Tuning Package

$1,200+ licensing

  • DEFI Custom Tuning$500
  • Mainline dyno session$350
  • DEFI RTD4 interface$350

Tuned on our dyno, and you leave with the RTD4 — so every later revision reaches the car without another visit. How every factory ECU the RTD4 supports is tuned in the shop.

Book dyno tuning

Supercharged and halo platforms — C8 Z06, ZR1, E-Ray, Hellcat, Demon, Trackhawk, TRX, GT500, Escalade V, Blackwing, GT-R and Raptor — take $900 of DEFI Custom Tuning instead of $500. A locked ECU or TCM adds its air return from HP Tuners, once per order: $100 2-day or $140 next-day.

Every price and package, side by side, is on the pricing page.

What can be added, and what it costs

  • Additional dyno time$350 per hourCharged in hour blocks when a session runs past its booking.
  • Ignite Racing Fuel$80 per 5-gallon pailSupplied at the shop when the calibration calls for a fuel you did not arrive on.
  • Wideband monitoringIncludedExternal wideband on every session. Not an upsell — it is how the car is kept safe.

Common questions

Will my numbers match another shop’s dyno?
Almost certainly not, and anyone who tells you otherwise is selling something. Different dyno types, correction standards and conditions produce different absolute numbers. What matters is that a measurement is repeatable against itself — which is why before-and-after runs on the same equipment, on the same day, is the only comparison worth anything.
Can you test a car that is not tuned by you?
Yes. Testing is a standalone service and we have no interest in leveraging it into work you did not ask for.