Corona, CA · In our shop
Engine break-in on the dyno
A fresh engine brought up exactly the way you, your engine builder or the parts maker asks — on the hubs, not in traffic.
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.
$350 per hourDyno time, run to your procedure or your engine builder’s
Nobody agrees on break-in, and we are not going to pretend they do
Ask ten engine builders how to break in a new engine and you will hear more than one answer. The disagreement is real, it is argued by people who know engines, and it is worth understanding before you choose.
The conservative school brings an engine up gently: varied load, no sustained high RPM, easy miles before it is ever asked for full power. Plenty of manufacturers publish a procedure along these lines, and plenty of builders will not have their engine run any other way.
The firmer school argues that piston rings seat best under real cylinder pressure early on, so the engine should see meaningful load from the start, in controlled steps with heat cycles in between. People who hold this view like a dyno for it because the load can be applied and measured instead of guessed at on the road.
Some builders run the engine in on an engine dyno before it is delivered, so it arrives already broken in and needs neither. Ask yours.
We run your procedure, whichever it is
We take no side. If your engine builder or the parts manufacturer states a procedure, we follow it as written. That matters, because a supplier may tie its warranty to it. If you have your own preference, we follow that. If you have neither, we will walk you through the options and you choose.
Bring the procedure written down: the load steps, the RPM limits, how many heat cycles, and when the oil comes out. A break-in gives an engine the start whoever specified it intended. It does not guarantee the engine, and we will not tell you it does.
What the dyno adds, whichever school you follow
On the dyno the car is bolted to the hubs. We can hold the exact load and RPM a step calls for, repeat it as many times as the schedule asks, and let the engine cool between cycles. Nobody is watching traffic instead of the gauges.
The whole session is logged, so you and your builder can see what the engine saw. Once the engine is cleared for full load, the car is already mounted and a Custom Dyno Tune can follow on the same equipment. That saves a second trip, which matters when the trip is up the 15 from San Diego.
- The procedure you, your builder or the parts maker specifies, run as written
- Load and RPM held exactly where each step puts them, with heat cycles between
- The whole session datalogged for you and your builder
What is included
- Hub mounting
- Dyno time run to the procedure you choose
- Heat cycles and cool-down between steps
- A datalog of the whole session
What to bring
- The break-in procedure: yours, your engine builder’s or the parts maker’s, written down
- A car ready to run: no leaks, no misfires, fluids at the right level, fasteners checked
- A calibration the engine can start and idle on — if it does not have one yet, tell us when you book
- The fuel it will run on
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
- Is a dyno break-in better than breaking it in on the street?
- Engine builders disagree about that, and we stay out of it. What the dyno gives you is control: whatever procedure you choose, each step is run exactly as written and logged, rather than approximated in traffic.
- My builder wants it broken in gently. Will you do that?
- Yes. We run whatever the builder or parts manufacturer specifies, gentle or firm. If their procedure means driving on the road rather than the dyno, we will tell you that too rather than sell you dyno time you do not need.
- How long does a break-in take?
- As long as the procedure says. Dyno time is $350 an hour, so send us the schedule when you book and we will tell you roughly how many hours to plan for before you arrive.
- I am in San Diego. Is it worth the drive?
- San Diego County customers make the drive regularly. Book the first slot of the day and the drive is clean both ways, and if the car is being tuned afterwards it can be done in the same visit rather than a second trip.
- Can you tune it in the same visit?
- If the procedure clears the engine for full load once the break-in is done, yes. If your builder wants an oil change or an inspection first, the tune waits until they have signed it off.
- What if the car is not ready on the day?
- There are no refunds on a session. If the car arrives with a leak, a misfire or anything else that stops it running safely, it comes off, you fix it, and we remount it on another day at a reduced rate.