BMW M2, M3 and M4 dyno results, 60–130 and quarter-mile times (S58)

Every car on this page runs Racebox custom tuning, so the fastest tune for a S58 (M3, M4, M2) is the one matched to the turbos and fuel you have: Fastest S58 tune (M2, M3, M4). The quickest S58 on this board runs 9.186 @ 147.84 mph (a BMW M3 (G80) on Doc Race single turbo kit, Precision 7275 Next Gen and E85); on stock turbos the best is 9.57 @ 142.54 mph (a BMW M4 on stock turbos); the quickest 60–130 is 4.50 s. Open any row for the sheet, the Dragy report or the slip and the full mod list.

On the Racebox board, stock-turbo BMW M2s, M3s and M4s (S58) with downpipes and the Racebox custom tune make 575–630 whp on 93 octane depending on modifications, 655–750 whp on ethanol with direct injection only and 730–755 whp on ethanol with port injection. The top one is a BMW X3M on stock turbos and E70 at 754 whp. All numbers are wheel horsepower, most of them off the Racebox Dynojet with the correction factor printed on the sheet. A hub dyno generally reads higher than a Dynojet (about 10% on the same car) and a correction factor can add up to 17% to a turbo car at altitude, so compare like for like: why hub dynos read higher and why correction factors lie on turbo cars. Every stock-turbo sheet is here, and this is the tune behind them: Fastest S58 tune (M2, M3, M4).

Full bolt-on (FBO) means stock turbos with downpipes, intakes, cooling and fuel, so every stock-turbo car on this board is an FBO car. They make 550–630 whp on 93 octane depending on modifications, 655–750 whp on ethanol with direct injection only and 730–755 whp on ethanol with port injection. The highest stock-turbo number is 754 whp from a BMW X3M on stock turbos and E70. On the street, the quickest stock-turbo quarter mile is 9.57 @ 142.54 mph and the quickest stock-turbo 60–130 is 5.69 s. All numbers are wheel horsepower, most of them off the Racebox Dynojet with the correction factor printed on the sheet. A hub dyno generally reads higher than a Dynojet (about 10% on the same car) and a correction factor can add up to 17% to a turbo car at altitude, so compare like for like: why hub dynos read higher and why correction factors lie on turbo cars.

S58 cars on Spool IFX1100 turbos make 825–910 whp on the Racebox board, mostly on E85 and E80. The top one is a BMW M3 on Spool IFX1100 turbos and E70 at 908 whp with a stock engine. On these turbos the quickest 60–130 is 4.93 s. Wheel horsepower off a Dynojet unless the sheet says otherwise; hub dynos and correction factors read higher, so compare like for like. Open any row for the sheet and the full mod list.

Upgraded-turbo S58 cars on the Racebox board run from 780 to 1,008 whp. Stock-location and hybrid turbos (Spool IFX1100 turbos) run 827–908 whp; single and top-mount turbo kits (Garrett G35 turbo, Garrett G40 single turbo, Precision 6870 single turbo, Precision 7275 turbo and turbo kit) run 780–1,008 whp. The top result is a BMW M3 (G80) on RK Autowerks single turbo kit, Garrett G40-1150 and E80 at 1008 whp on a built engine. Wheel horsepower off a Dynojet unless the sheet says otherwise; hub dynos and correction factors read higher, so compare like for like. Every upgraded-turbo sheet is here.

The highest S58 dyno result Racebox has published is 1008 whp from a BMW M3 (G80) on RK Autowerks single turbo kit, Garrett G40-1150 and E80. Stock-turbo S58 results on the board run from 549 whp to 754 whp depending on fuel and supporting mods; the top stock-turbo number is 754 whp from a BMW X3M on stock turbos and E70.

The car was tuned by Racebox on the street or remotely with datalogs and never put on the dyno, so there is no power number. The 60–130 or quarter-mile time still comes with its Dragy report or timeslip.

Stock means the factory turbochargers. Stock-location hybrids, drop-in upgrades and full turbo kits are all listed as upgraded turbos, so the stock-turbo filter only shows cars on the turbos they left the factory with.

Racebox dyno sheets are Dynojet printouts, and the correction factor is printed on the sheet you see when you open the result. Dyno graphs from customer and partner posts are listed as posted.

Only like for like. All numbers are wheel horsepower, most of them off the Racebox Dynojet with the correction factor printed on the sheet. A hub dyno generally reads higher than a Dynojet (about 10% on the same car) and a correction factor can add up to 17% to a turbo car at altitude, so compare like for like: why hub dynos read higher and why correction factors lie on turbo cars. When two shops disagree, trap speed and 60–130 time settle it, which is why every car here carries its track numbers next to its dyno number.

Elapsed time is what wins a race, so the boards rank by ET and call the lowest ET the quickest. Trap speed is available as its own sort for anyone comparing power at the top of the track.

Racebox customers can submit directly: sign in with the email you ordered your tune with at goracebox.com/pages/submit-result and send the dyno sheet, Dragy report or timeslip with your mod list. Every submission is checked by hand before it is listed, and customer names are never shown. You can also tag @goracebox on Instagram.