Why OEMs Limit Performance (And How to Fix It)

Car brands are secretly limiting your car’s potential, and it has NOTHING to do with reliability.

Getting more power out of a factory car can be surprisingly straightforward with the right software (and sometimes hardware modifications), but what goes into developing a proper tune that exploits more potential without pushing the OEM components past their limits?

At SEMA, HPA had a chat with Arin Anhell from APR, one of the pioneers in the European aftermarket tuning market, to find out how they test and develop tunes, what safety measures they implement, and why modern turbocharged engines leave so much untapped potential from the factory.

Also discussed:

- The limits of factory components
- How APR ensures reliability in their tuning
- Why OEMs leave horsepower on the table
- How direct injection affects tuning potential
- The APR Plus warranty program and what it covers

If you're considering tuning your BMW, Mini, Volkswagen, Audi, Porsche, or other VAG vehicles etc this could be a very helpful insight into some of your options from APR and sister company Dinan Engineering.

TIMESTAMPS:
0:00 - Getting More Power From Your Factory Car
0:07 - Arin Anhell: APR
0:13 - How APR Develops a Tune
0:35 - Finding the Limits
0:50 - Sensors & Data Collection
1:19 - Dyno Testing & Power Increases
1:40 - Why Do Factory Cars Have Headroom?
2:23 - The Audi RS6 & Porsche Power Differences
3:04 - Factory ECU Safety Margins
3:39 - Fuel Quality & OEM Limitations
4:07 - The MK8 GTI & Octane Impact
4:42 - Oil Change Intervals & Reliability
5:50 - Cylinder Pressure & Peak Torque Management
6:36 - Low-Speed Pre-Ignition (LSPI)
7:35 - In-Cylinder Pressure Testing
8:04 - Tuning Safely Without Risk
8:42 - When Factory Hardware Becomes a Limitation
9:26 - Turbo Upgrades & Stage 3 Tuning
9:50 - Direct Injection Fuel System Limits
10:38 - APR Plus Warranty Explained
11:32 - APR Engine Replacements?
12:08 - BUILD.TUNE.DRIVE