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Apex Tuned  /  About

Ex-racing engineers.
Real metric. Real budget.

We're not a shop that wants to tune everything. We're a shop that wants to tune a few platforms exceptionally well. And back the work up with data, dyno graphs, and lap-time deltas you can hold us to.

Founder · Marco Reuss

From the paddock to the lift.

Marco spent eleven seasons as a performance engineer in IMSA. Three with a GT Daytona team running a 992 GT3 R, and another two with a customer Audi RS LMS program. He started Apex Tuned in 2019 to bring that same engineering discipline to street and HPDE cars in Southern California.

Every customer build runs through the same workflow we used trackside: data log → hypothesis → controlled change → re-log → verify. Nothing leaves the lift without a printed result.

"If a shop can't show you the data, they didn't do the work. We show you the data."

Marco Reuss · Founder & lead engineer
IMSA · 2014 – 2024 · GTD & GT4

How we work

Four steps. Every job. No exceptions.

This is the process we run on a customer M3 and the process we ran on the GT Daytona car. The scope changes; the discipline doesn't.

01

Baseline

A free 30-minute consult. Then a paid 2-hour dyno block. Three pulls, AFR sweep, knock log. You leave with a printed baseline. We don't quote a build without one.

02

Plan

A written build sheet: parts, labor, dyno hours, fuel type, expected gain range, edge cases. If the budget doesn't match the goal we tell you in this step, not after we've started.

03

Execute

Daily photo updates. The same tech who scoped the build does the install. Every fastener torqued to spec. Every fluid logged. No "we'll come back to it."

04

Verify

Final dyno, road test on our 12-mile validation loop, and (for track cars) a check-out session at Streets of Willow. You leave with the graph, the log file, and a delivery checklist.

Shop tour

3,200 sq ft. Three lifts. One dyno cell.

We share the back of the building with an aerospace machine shop. Climate-controlled. ESD-safe floors. Tools you can eat off of.

Costa Mesa · CA 92627
Equipment

What's behind the data.

A shop is only as good as its measurement tools. Here's what we measure with. And the calibration cadence so you know the numbers stay honest.

Chassis Dyno

Dynojet 224x · AWD
Capacity
2,000 hp
Roller
48"
Drum
Eddy current
Cooling
18,000 CFM
Calibration
Quarterly

Alignment

Hunter HawkEye Elite
Accuracy
±0.01°
Camber range
±8°
Toe
0.5 mm res
Cross weight
Sub-2 mm capable
Calibration
Monthly

Data

AiM · MoTeC · CSF
Loggers
AiM Solo 2 DL
Pro logging
MoTeC ACL
Thermal
FLIR E96
OBD
ProTool · OPS
Software
i2 Pro · WinTAX
Every dyno cell drifts. Ours is calibrated quarterly by a certified Dynojet tech with sealed records. We'll show you the cert.
The team

Four people. Five decades of combined paddock time.

Every Apex Tuned tech has competed, instructed, or engineered at the club-racing level or above. We hire from the paddock, not the parts counter.

MR

Marco Reuss

Founder · Lead engineer

11 yrs IMSA performance engineer. Mechanical engineering, UC Irvine. Holds an SCCA Pro racing license.

JT

Jamie Tran

Calibration · ECU lead

Bootmod3 and MHD certified. Eight years in BMW-specific tuning, two seasons running data on a Porsche Cup car.

DC

Dani Cortez

Chassis · Suspension

Former Continental Tire SportsCar team mechanic. NASA TT3 driver. Lives on the alignment rack.

AK

Aaron Kovacs

Brakes · Fabrication

Certified welder. 12 years with a top-tier brake distributor. Builds custom ducts and cooling solutions in-house.

ER

Elena Rios

Service advisor

Your point of contact. Coordinates parts, schedules, transport, and HPDE event support so you never wonder where your car is.

RG

Reed Gallagher

Track support tech

On call for Buttonwillow, Streets, Big Willow and Chuckwalla weekends. Brings the support trailer and the spares.

House rules

The five things we won't do.

  1. 01

    Sell numbers we can't dyno.

    If we can't prove the gain on our own roller, we won't quote it. "Other shops claim 600 hp" is not data.

  2. 02

    Tune past the fuel system.

    Stage 3 numbers on stock LPFP? No. We'd rather lose the sale than blow up your motor.

  3. 03

    Recommend power over suspension.

    For a track-day driver under 1:50 at BW, brakes and dampers are almost always the next $5K. We'll tell you that even if it costs us the engine work.

  4. 04

    Skip the post-install validation pull.

    If we touched the engine management, you leave with a fresh dyno graph in your hand. Always.

  5. 05

    Hide who's working on your car.

    Every customer gets a named tech, a direct phone number, and daily progress photos. No anonymous service queue.

Come see the shop. Run a baseline. Build the plan.

Schedule a visit Tue – Sat · 10 min from John Wayne

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