BigBoost Turbo Upgrade with TBI

[doublespaces]

Looks like @JF@Big_Boost_Turbo is stepping into the B58 game:

Last week we got our own M240i for parts development. After doing some baseline runs at the dyno, we finally got to work on it. Our plans are manufacturing a stage 3 turbo and a port-injection, both to be released by late May. Stages 1 and 2 with direct replacement turbocharger will follow, no estimate time of arrival for those.

We'll keep you updated on progress!
*Update*
We got the manifold yesterday and will be testing the kit with just JB4, EWG Wires and Meth injection, while PI is being manufactured.

So today we have machined the manifold that arrived yesterday from the foundry. We have test fitted it and looks great, we took some pictures to share with you. Port injection is now on CAD design, we hope one month from today we will start some testing.

 

[doublespaces]

I wonder how much fuel the PI can support without a flash tune?

 

[JF@Big_Boost_Turbo]

The problem is not the fuel amount, there is a cap in the DME that does not allow it to give more fuel when boost levels raise. I think with the port-injection and stage 2 fuel pump we should be able to run 12.5 AFRs in which the engine can produce more power and hold more boost. Now our restricting factor is the Torque Limiter, as it happens with the N55 when the torque levels are too high for the DME's parameters the throttle body blade angle will start reducing.

 

[doublespaces]

The problem is not the fuel amount, there is a cap in the DME that does not allow it to give more fuel when boost levels raise. I think with the port-injection and stage 2 fuel pump we should be able to run 12.5 AFRs in which the engine can produce more power and hold more boost. Now our restricting factor is the Torque Limiter, as it happens with the N55 when the torque levels are too high for the DME's parameters the throttle body blade angle will start reducing.

Forgive my ignorance, but is there a way to fake the torque value with the JB4? Something I'm sure @Terry@BMS has looked at, just don't know what the final word on that is.

 

[doublespaces]

The problem is not the fuel amount, there is a cap in the DME that does not allow it to give more fuel when boost levels raise. I think with the port-injection and stage 2 fuel pump we should be able to run 12.5 AFRs in which the engine can produce more power and hold more boost. Now our restricting factor is the Torque Limiter, as it happens with the N55 when the torque levels are too high for the DME's parameters the throttle body blade angle will start reducing.

I heard you'll have this cracked in 2 months? @JF@Big_Boost_Turbo

 

[JF@Big_Boost_Turbo]

Because we are committed with our customers we have a fully developed wastegated exhaust manifold which allows full boost control without compromising performance!

The reason we developed this new manifold was because some cars varying on weather conditions and additional hardware were building boost very fast while the DME wasn't fast enough to control the boost correctly, causing throttle oscillations. The external wastegate keeps the twin scroll division so the awesome response these cars were having is kept but allowing full top end performance without throttle closures.

All these tests were done on 93 octane fuel and throttle body injection.

Mods: Stage 3 turbo with wastegated manifold and manual boost controller, Throttle Body Injection with #24 jet, Jb4, BMS intake. Stock catback exhaust. V.8 firmware

Here there are different maps and settings, dyno and log.

Most graphs have the boost which is named as user analog 1.

Map 0:

Map 1:

Map 2:

Map 7 20 add, 20 fua:

Map 7 40 add, 20 fua:

Map 7 45 add, 20 fua:

All maps and settings:

Map 7 different settings:

Map 0, 1 & 2:

 

[doublespaces]

Very nice! Do you have images of the new design?