Speed Density Tune Add-On

$100.00

Delivery: Digital service; nothing ships. Revisions are normally worked in weekend batches.
Required: A compatible GropeTuned calibration and supporting hardware. Contact us if unsure.

Final sale. No change-of-mind returns or refunds. Read the policy

Need help choosing? Contact us.

After ordering

Contact GropeTuned with your order number, model year, transmission, complete mod list, fuel, and goals. For a retune, include what changed since your last completed tune.
Have a suitable Atlas adapter and laptop ready. I’ll provide instructions for your current tune file and the datalogs needed for your setup.
Calibration and datalog revisions are normally worked in weekend batches. Timing depends on the data and any issues we need to resolve.
Watch the checkout email address for your tune and instructions. Initial revisions for the agreed setup are included; later setup changes use the separate retune service.

Send your order and setup details

Add speed-density calibration to a GropeTuned tune. This service covers the calibration changes and datalog revisions needed for a compatible speed-density setup.

Important: Hardware and sensors are not included. Your vehicle must have compatible hardware installed and be mechanically ready for tuning. Contact GropeTuned before purchasing if you are unsure whether your setup is supported.

What it gets you

MAP-based load calculation instead of relying on the MAF
Correct behaviour with intakes, manifolds and piping that upset the MAF reading
VE table development from your own datalogs
Revisions until load and fuelling track properly across the range

Add this to

This is an add-on to a calibration, not a standalone tune. Pair it with one of:

WRX Atlas E-Tune — the standard remote calibration
Teach-As-We-Go Tune — calibration plus the reasoning behind it
Or the tune already included with a G25-660 / G30-660 turbo kit or the BRZ manifold bundle

Especially worth it if you're running the BRZ intake manifold adapter kit or the 62mm throttle body — both change the intake tract enough to make MAF-only load calculation fussy.

Also available: Flex Fuel Tune Add-On.

Calibration service and software feature

The $100 price covers GropeTuned’s calibration work. NAMR’s Speed Density software feature for the VA/VB WRX is available separately for $0. The free feature does not include a custom tune, hardware, or sensors.