4 verified results from Racebox-tuned B48 cars: BMW 230i, 330i and 430i and the 2.0-liter GR Supra, on stock turbos and on hybrid turbo upgrades. Every entry opens to its dyno sheet, Dragy report or timeslip with the turbos, fuel and whether the engine and transmission are stock.
Updated · 4 results
Filters apply to all three boards below.
Wheel horsepower and torque, highest first. Racebox sheets come off the shop Dynojet; the rest are dyno graphs posted by Racebox or by the owner. The caption under each car reads power, track numbers when the car has them, and the setup in the same order every time.
| Turbo | IPOS IM500 hybrid turbo |
|---|---|
| Fuel system | IPOS Motorsport Port Injection Kit w/ ID1050s, Visconti stage 1 LPFP, Motiv Motorsport Reflex+ controller |
| Fuel | E85 |
| Engine | Stock |
| Transmission | Stock |
| Exhaust | IPOS Motorsport True 4-inch Downpipe |
@goracebox · 2025-01-28
Full build & photos on Instagram ↗| Turbo | IPOS IM450 hybrid turbo |
|---|---|
| Fuel system | DW 550cc injectors |
| Fuel | not listed |
| Engine | Stock |
| Transmission | Stock |
| Exhaust | aftermarket downpipes |
@goracebox · 2023-10-16
Full build & photos on Instagram ↗Quickest first, every one from a Dragy GPS report. 60–130 is the cleanest street comparison because it removes launch and traction from the equation and shows what the tune and turbos do at speed.
| Turbo | IPOS IM500 hybrid turbo |
|---|---|
| Fuel system | IPOS Port Injection Kit w/ ID1050X, Visconti Stage 1 LPFP, Motiv Motorsport Reflex + |
| Fuel | E85 |
| Engine | Stock |
| Transmission | Stock |
| Exhaust | IPOS True 4-inch Downpipe |
@goracebox · 2025-03-25
Full build & photos on Instagram ↗Ranked by elapsed time (quickest first), with trap speed shown when the slip has it. Sort by trap speed to see the highest-mph passes. Proof is a track timeslip or a Dragy quarter-mile report.
| Turbo | IPOS IM500 hybrid turbo |
|---|---|
| Fuel system | IPOS Port Injection Kit w/ ID1050X, Visconti Stage 1 LPFP, Motiv Motorsport Reflex + |
| Fuel | E85 |
| Engine | Stock |
| Transmission | Stock |
| Exhaust | IPOS True 4-inch Downpipe |
@goracebox · 2025-03-25
Full build & photos on Instagram ↗Nothing on this page is a claim from a caption alone. A result is listed only when the proof is attached, and the setup is listed the same way for every car so the numbers can be compared.
Racebox dyno sheets are Dynojet printouts. Open any result to see the sheet; the correction factor is printed on it. Customer and partner dyno graphs are listed as posted.
From Dragy GPS performance reports. The report is in the gallery, and where the owner recorded the pass, the in-car video is too.
From track timeslips or Dragy quarter-mile reports. Boards rank by elapsed time, so the quickest car tops the list; trap speed is a separate sort.
Stock means the factory turbos. Anything else, including stock-location hybrids and drop-in upgrades, is listed as upgraded turbos.
Built means the internals or the transmission were upgraded for power; stock means factory. Downpipes are listed as stock or aftermarket because they change what a turbo can do.
A car that was tuned on the street or remotely with datalogs and never put on the dyno. There is no power number, so the caption says Street tuned and the track or Dragy result stands on its own proof.
The B48 cars on this board run a hybrid turbo, port injection and an upgraded high-pressure pump on top of the usual downpipe and flex fuel kit.
Every car on this page runs Racebox custom tuning, so the fastest tune for a B48 (330i, 230i, Supra 2.0) is the one matched to the turbos and fuel you have: Fastest B48 tune (230i, 330i, 430i), Fastest GR Supra 2.0 (B48) tune. The quickest B48 on this board runs 9.96 (a Toyota GR Supra 2.0 (B48) on IPOS IM500 Turbo Upgrade and E85); the quickest 60–130 is 6.31 s. Open any row for the sheet, the Dragy report or the slip and the full mod list.
Upgraded-turbo B48 cars on the Racebox board run from 475 to 507 whp. Stock-location and hybrid turbos (IPOS IM500 turbo and hybrid turbos) run 474–507 whp. The top result is a Toyota GR Supra 2.0 (B48) on IPOS IM500 Turbo Upgrade and E85 at 507 whp with a stock 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 B48 dyno result Racebox has published is 507 whp from a Toyota GR Supra 2.0 (B48) on IPOS IM500 Turbo Upgrade and E85.
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.
Racebox customers can submit a dyno sheet, Dragy report or timeslip with the mod list. Sign in with the email you ordered with; every result is checked by hand before it is listed, and names are never shown.
