Subaru · Evo 8/9 · C5/C6 Corvette
Tuned for your car,
your fuel, your mods.
- 24-48hdatalog turnaround
- 3revisions included
- Knock-safeconservative timing, real logs
Platforms & tools
Subaru is what I tune every week, and it's the only platform I take on remotely. Evo 8/9 and C5/C6 Corvette are open for street and dyno work in person.
Pricing
Flat-rate packages. No hourly surprises. Remote if you can log, in-person if you'd rather I do it.
Add-ons
| Add-on | Price | Notes |
|---|
Prices are for the calibration service only. Hardware and shop labor are separate. Dyno tunes include dyno time. Remote e-tunes are paid before the first base map is sent. Three datalog revisions are included with every e-tune; additional revisions are billed per the add-on table. Turnaround times are typical, not guaranteed. All services are for off-road / closed-course use only and are subject to our Terms & Disclaimer.
How remote tuning works
Subaru only. You flash and drive, I read the logs and send revisions. Here's the exact loop. Evo and Corvette customers skip all of this, because in person I do the flashing and logging.
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1 · Submit the intake form
Tell me the car, every mod, your fuel, whether you're on a COBB Accessport or open source, and what you want out of it. The form shows you exactly what equipment you need once you pick your tool.
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2 · Pay & get your base map
Once payment clears you get a conservative base map plus a logging list for your tool (which parameters, what sample rate) within 24-48 hours.
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3 · Flash, then log the pulls I ask for
Idle & cruise logs first, then part-throttle, then 3rd/4th gear WOT pulls only after I clear you. Every request comes with a short checklist so you know exactly what to record. WOT logging belongs on a closed course or private road with a passenger running the laptop; never log while driving alone.
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4 · Upload logs, get a revision
Drop your logs in the upload link. I review MAF/VE, AFR, knock, timing, and boost, then send the next revision with notes on what changed and why.
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5 · Repeat until it's right
Three revisions are included and most bolt-on cars finish inside that. Big-turbo and E85 builds sometimes need one or two more, billed per revision. If we hit a wall, a 30-minute video call usually sorts it faster than another round of logs.
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6 · Final map & support
You get the final file, a plain-English summary of the tune, and what to watch in future logs. Returning customers get discounted re-tunes when mods change.
Subaru — COBB Accessport
Accesstuner Race map files loaded through your Accessport. Log on the AP with my parameter list and send the .csv exports. Don't update AP firmware before we talk; current versions only support flex fuel on CAN-bus cars with COBB's NexGen kit.
Subaru — open source
Tactrix OpenPort 2.0 required. I supply the ROM file; you flash with EcuFlash and log with RomRaider Logger. Wideband strongly recommended.
Evo 8/9 & Corvette — in person
Street and dyno only. I bring the cable, software and laptop, so there's nothing to install on your end. Bring the car with fresh fuel, no leaks and no pending codes.
What you need before we start
Remote tuning only works if you can flash and log reliably. In-person work is simpler, because I bring the hardware. Here's the checklist for each platform, and the intake form repeats it once you pick yours.
Every car also needs: healthy spark plugs at the correct gap, no boost or vacuum leaks, a fuel pump and injectors sized for the fuel you're running, and a clean scan with no stored codes. A tune can't fix hardware.
Start a tune
Fill this out and I'll reply with a quote, payment link, and next steps. Usually same day. Remote e-tunes are Subaru only; Evo and Corvette are street and dyno in person.
Recent builds
What a finished job looks like: the parts, the tune, and the before-and-after numbers on the same dyno.
Customer reviews
Real cars, real logs. Reviews are posted with the customer's permission.
Tuned with JDM Ultra? Leave a review
Takes a minute. I'll post it here with your first name and car once I've read it.
FAQ
Is a remote tune as good as a dyno tune?
For street cars, a well-logged remote tune is usually better because it's tuned in the real conditions you drive in. Dyno time is still the right call for race-only cars, unusual setups, or when you need a certified power number.
What do I need on my end?
For a Subaru remote e-tune: a COBB Accessport, or a Tactrix OpenPort 2.0 with EcuFlash and RomRaider for open source, plus a laptop and a safe road for pulls. A wideband O2 if you're on open source or E85. For street and dyno tunes on any platform you need almost nothing, because I bring the cable, software and laptop. The full checklist is in the Requirements section above.
How long does it take?
Base map in 24-48 hours after payment. Each revision typically the same. Total time depends on how quickly you can log. Most bolt-on cars finish within the three included revisions, in about a week.
Do you tune cars with mechanical problems?
No. Boost leaks, bad plugs, weak fuel pumps, and clogged injectors get diagnosed first. I'll tell you what the logs show and we pause until it's fixed. A tune can't paper over hardware.
Will you lock the tune?
No. Open-source ROMs are yours, unlocked. COBB maps work with your Accessport.
Do you tune Evos or Corvettes?
Yes, for street and dyno tuning in person. Evo 8/9 runs on EcuFlash with Tephra mod ROMs, and C5/C6 Corvettes on HP Tuners. Remote e-tuning is still Subaru only, because the logging workflow on those platforms isn't something I'll hand to a customer yet. Pricing is the same as Subaru: $500 street, $650 dyno, more for flex fuel.
Why does open-source flex fuel need DimeMod?
Stock Subaru ROMs have no flex-fuel logic. DimeMod is a paid patch that adds ethanol-content blending, plus other features, to open-source ROMs. You buy the license for your ROM ID from the DimeMod author, and I handle the install and calibration. COBB flex fuel doesn't need it. I'm working on my own definitions so this won't be required down the road.
Will you review a tune someone else did?
Yes. A datalog review is $50 and covers up to 30 minutes of analysis on one set of logs, plus a written summary of what I find. I don't make changes to another tuner's file. If it needs longer than 30 minutes I'll tell you what it needs and get your okay before continuing at $95/hr, billed in 15-minute increments. Email logs to tuning@jdmultra.com, and include the tune file if you have it. Reading logs without seeing the tables is guesswork.
What's the video-call option for?
Live screen-share for anything that's faster to see than to email: logging setup, a drivability issue, a second opinion on someone else's tune. $95/hr, 30-minute minimum, booked through the form.
I already had a tune. What does a re-tune cost after new mods?
If it’s a bolt-on change on your existing map, a minor remote re-tune is $150 for returning customers on the same vehicle within 12 months. Anything that changes the turbo, injectors, fuel system, cam or fuel type is a new tune, at 20% off for returning customers. Evo and Corvette work is in person only, so those re-tunes always use the discounted rate rather than the $150 minor rate.
What if my engine breaks?
Modified engines can fail, and no calibration can protect against a boost leak, bad fuel, a tired fuel pump, or a pre-existing mechanical problem. I tune conservatively and log carefully, but by using my services you accept that risk. The full policy is in the Terms & Disclaimer.
Refunds?
If a hardware issue surfaces mid-tune, your unused revisions carry over for 6 months while you fix it. No refunds once the base map is delivered.