Quote:
Originally Posted by neovb
Our turbos are made by Borg Warner.
I will say that its probably impractical to go to a single large turbo. For one, you'd have to have a custom exhaust manifold and downpipe designed and built. After that, you'd have to come up with either a standalone ECU option or have a piggyback controlling fuel, timing and boost. I'd imagine you'd probably have to get rid of the DPF and urea injection (for US cars), as with a high flow turbo and increased boost you'd need fairly larger exhaust piping. Plus, lots and lots of tuning. Unfortunately, I'd think the JBD just isnt robust enough for this type of upgrade and I dont think the OEM ECU would be able to compensate. You'd also have to probably think about larger fuel injectors (not sure how this works on a direct-injected setup) and an upgraded fuel pump. Add to that a larger FMIC and larger piping to compensate for the increased air flow and higher intake air temperatures (after the compressor).
I'd also wager that you'd lose all low end power and torque, although this may be somewhat mitigated if you go with a good ball-bearing turbo thats properly sized.
What I think is very feasible is keeping the stock turbos and using a standalone ECU (i.e. AEM EMS) to control engine tuning functions (fuel flow/pressure, boost, timing, etc.) but leaving the OEM ECU to control the "normal" stuff (i.e. DPF, urea injection, etc.). With this setup, its also probably very possible to code out any errors that show up based on the aftermarket tuning solution. I'd bet our stock turbos are capable of pushing at least 5-10 more psi than stock, and if we could tune fuel and timing to match, we'd probably see some serious power increases. Of course, someone would have to shell out some serious cash to be the test subject!
Now, I could be completely wrong about all of this, as I'm completely and totally based on my upgrading/tuning experience with gas cars. But anyways, those are just my thoughts  |
Thanks neovb. Interesting points. Sounds really involved to go down that road. Maybe Dinan is working on true psi boost tune for the D.