We don't guess at power. Your car is strapped to our in-house all-wheel-drive Dynojet, tuned under real load, and you leave with the sheet that proves what changed.
Off-the-shelf files are written for a car that isn't yours, in weather that isn't ours. Every tune here is written on our dyno, on your car, with your fuel.
We run the car as it sits so you have a real before number — not a magazine figure or the last shop's claim.
Compression, leaks, plugs, fuel pressure. If the car isn't safe to load, we stop and tell you rather than taking your money.
Fuel, timing, boost and torque management dialed in over multiple pulls, watching knock and air/fuel the whole way.
A dyno-perfect car that stumbles at part throttle is a failed tune. We drive it and fix the way it behaves in traffic.
Before and after, printed. It's yours — for your records, your build thread, or the next owner.
What we changed and why goes on your ticket, so any future work starts from fact instead of guesswork.
These are the numbers we quote every day. A written estimate always comes before any work starts.
Calibration on our AWD Dynojet, street verification, printed sheet.
No tuning — just a documented, repeatable number for your car.
Shift points, line pressure and torque limits. Often done the same visit.
Both calibrations in one visit, one drop-off, one set of pulls.
Parts, HP Tuners credits and any mechanical work found during the health check are quoted separately and never added without your approval. Cars needing repair before they can be safely loaded are stopped and quoted first.
A two-wheel-drive dyno can't load an Audi, a Subaru, a GT-R or a modern AMG properly. Ours reads all four wheels, which means the calibration is written against what the engine is actually doing rather than an estimate.
That's also why people trailer in from Nashville and Birmingham for a day on our rollers.
A full dyno tune at Apex is $895. That covers the pulls, the calibration work and the printed sheet you take home. A baseline dyno pull with no tuning is $300. A TCU tune is $695 and is often done at the same visit, which saves you a second trip.
Most street cars are a single day. Boosted cars, built engines and anything with fresh hardware take longer because we stop and check things between pulls rather than chasing a number. We tell you before you drop the car off, not after.
Our Dynojet reads all four wheels, so all-wheel-drive cars — Audi, Subaru, GT-R, modern AMG — get tuned under real load instead of being estimated. Most shops in north Alabama only have a two-wheel-drive dyno.
Yes. E85, pump gas, race gas and flex-fuel setups. If you want a flex tune, tell us up front so we can plan the sensor and the fuel system around it.
A tune done badly will. We tune to a target you agree to, watch knock, air/fuel and temps the whole time, and we will tell you when the parts on the car can't safely support what you're asking for. A modified calibration can give a manufacturer grounds to deny a related claim, so decide that with your eyes open.
A car that's mechanically sound — good plugs, no leaks, healthy fuel pump. If your car has been tuned before, bring the file or tell us who did it. If you have HP Tuners credits already, bring the MPVI interface.
We reply the same business day. Prefer to talk? Call 256-975-0012 — you'll get the shop, not a call center.
