It's a completely unmodified Regina EFI. I'm not entirely sure why it works, theory is that while Regina can't read anything above atmospheric pressure, It will think the engine is dying at no vacum and add fuel to keep it alive. However, you will need to somehow add more fuel at boost, otherwise it can't boost to more than 0,2bar before it starts knocking and stuttering. In my setup I use the coldstart injector to add fuel at boost. I have a pressure sensitive switch in the manifold that opens a relay, which cycles the coldstart injector at boost. More common trick is to increase fuel rail pressure, or install T5 turbo injectors. All methods are gonna cause it to run very rich. Atleast in my setup, it's still decently economic when not boosting.
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how does that works? with that vacum manifold? and where do you buy parts for regina?
It's a completely unmodified Regina EFI.
I'm not entirely sure why it works, theory is that while Regina can't read anything above atmospheric pressure,
It will think the engine is dying at no vacum and add fuel to keep it alive.
However, you will need to somehow add more fuel at boost, otherwise it can't boost to more than 0,2bar before it starts knocking and stuttering.
In my setup I use the coldstart injector to add fuel at boost.
I have a pressure sensitive switch in the manifold that opens a relay, which cycles the coldstart injector at boost.
More common trick is to increase fuel rail pressure, or install T5 turbo injectors.
All methods are gonna cause it to run very rich.
Atleast in my setup, it's still decently economic when not boosting.