Performance shop on Thrift Road, since 2011
Wheel horsepower, SAE J1349 corrected. Dyno sheet #2140.
We calibrate BMW, Audi, Porsche and Mercedes-AMG engines on our own chassis dyno. Every car is measured before and after the work, and the dyno sheet goes home with your keys.
Everything happens under one roof: chassis dyno, engine room, alignment rack and fab bay. Prices are labor on 2015-and-newer cars. Parts are quoted separately, on a written estimate you approve before we start.
Two baseline pulls, a map written for your fuel, three verification pulls and a before-and-after dyno sheet. Flashing back to stock takes 20 minutes.
2–3 days
from $1,150
Downpipe, charge pipe, intercooler and intake. Stainless exhaust work is TIG-welded in our own fab bay.
3–5 days
from $950
Öhlins, KW or Bilstein coilovers, sway bars and bushings. Corner balance on four scales and a Hunter Hawkeye Elite alignment.
2–3 days
from $780
Two-piece rotors, calipers, stainless lines and fluid with a dry boiling point above 570 °F. Tested with three back-to-back stops.
1–2 days
from $520
Upgraded clutch, transmission adaptation and TCU calibration for the new torque figure.
2–4 days
from $850
A diagnostic before any work is $95, credited to your invoice when we do the job.
Measured on our dyno on a BMW M340i with the B58 engine. Wheel horsepower; stage prices include parts and labor.
326 whp base
386 whp +60
420 whp +94
505 whp +179
A map is written in pulls: two baselines, one variable at a time, then three verification pulls back to back with no cool-down. The job is done when the last three pulls agree within 1%.
Apex Motorworks
Dyno sheet #2140
| Pull | Stage | whp | lb-ft | IAT, °F |
|---|---|---|---|---|
| 1 | Base | 326 | 325 | 106 |
| 2 | Base | 325 | 323 | 109 |
| 3 | Stage 2 | 420 | 447 | 111 |
| 4 | Stage 2 | 419 | 445 | 115 |
| 5 | Stage 2 | 420 | 446 | 117 |
| Road tests | Before | After |
|---|---|---|
| 0–60 mph | 4.2 sec | 3.8 sec |
| 60–0 mph, third stop | 113 ft | 105 ft |
The order of work is the same for every car. The diagnostic and the verification pulls are not optional — the warranty depends on them.
Day 1
We pull codes, run a compression test on every cylinder and smoke-test the boost system. Then two baseline pulls on the dyno. If something is failing, we agree on the repair first: we do not calibrate an engine that is not healthy.
Days 2–3
Downpipe, charge pipe and intake go on. The torque value for every joint goes on the job card, and the job card goes into your file.
Day 4
We write the map for the installed parts and your fuel. Every pull is logged for intake air temperature, ignition timing and air-fuel ratio.
Day 5
Three verification pulls back to back, a test drive with you behind the wheel, then the dyno sheet and logs in hand. A log review at 600 miles is on us.
12,000 square feet in west Charlotte: eleven bays, a ventilated dyno cell and a separate engine room. The lounge looks into the dyno cell through glass, so you can watch your pulls live.
I got a dyno sheet with before and after curves, so I can check the result myself. The car pulls cleanly to redline and the fuel trims are steady.
Before recommending anything, they showed me the logs: two ignition coils were already misfiring. They replaced those first, then did the calibration. I have brought three more cars to Apex since.
The brake job took eight days. Eleven months and one Blue Ridge Parkway trip later, the pedal stays firm after repeated hard stops.
A diagnostic takes about 40 minutes and costs $95. You leave with a written estimate — parts, timeline and price — before any work begins.
Thank you. This is a demonstration site, so the request does not go to a real company.