Alright...thats good going
Firstly to clarify, this is loud thinking on perhaps the only conceivable twin turbo panga with an engine that should not cause a major disaster (either emotionally, operationally or financially) if things go wrong. Alternatively, the same panga can be done on the 1KZT which will perhaps be better suited given its larger displacement albeit still 4 cyls vs 6 and much limited flexibility given electronic controls....
@MitsuMan: I actually really really like my 2LT for a number of reasons and never went for a 1KZT upgrade primarily because in this particular case, I never could foresee a significant enough performance jump to justify the cost. With a mechanical pump its also easy to vary between race and economy settings, which are both quite enjoyable with a little extra boost on the CT20 turbo. I do agree that the 4000rpm second boost is too high and perhaps getting the whole boost pattern shifted down by at least 500rpms would be the most interesting challenge here....
@Ghuncha: Are you sure that the valves are ecu controlled? From the photos I would have thought that they were mechanical with minimal electronics....
@imitshal: Yes, I believe the BMW sequential twin-turbos are actually where I originally picked up the basic bug from. The TLC200 (and some LWB 70s) have the twin turbo VD engines and I was surprised to see that the 2JZ has a sequential set-up as reportedly these were sprawled all over our kabaar markets just about a few months back. Thanks for the link!
@syncview: Actually, I am short by just those few hundred dollars that would be needed for the R&D here As a few friends of mine in college used to jokingly say about a friend from Ratta Amraal (Rawalpindi): "Talent ubhar raha thaa, ghurbat ne ooper se paaon rakh diyaa"
Some questions, I struggle with at this stage:
How can the JDM and the US market 2JZ-GTE's both have the same RPM ranges using two completely different sets of turbos?
What are the possible ways of lowering the overall RPM band on the 2JZ turbo set-up?
Can the same 2LT boost controller be made to work with the sequential set-up?