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Buly,
I can only echo what Rusty said about "danger, danger." You've got
runaway boost, irrespective of the fact that you removed the wastegate.
The wastegate size is not sufficient to get rid of all the boost you're
producing. That boost past 30" MP makes the turbo go even faster, which
feeds back even more to the insufficient wastegate--it's a recursive
cycle that takes you to that very high boost level very quickly. All
the racer boys working with the stock turbo complain about it.
All that boost requires tons of fuel. Think .65 BSFC, guess what
horsepower you're producing at that boost level and figure out how much
fuel you need to deliver. Then re-check all your bottlenecks: fuel
injector sizes, fuel pressure, pump sizes, fuel computer programming,
everything,
You need to be able to control that boost, friend. It could go
uncontrollably lean on you and....
The symptoms all tell the same story.
Barry Gardner
Wheaton, IL
87 TII sitting on my driveway
Bulent Aliev wrote:
I ran yesterday
my engine with John inside the plane and noticed something that John
said is happening to his stock turbo too. After 30" of MP pressure the
turbo sometimes goes to 40-46", but suddenly the MAP jumps to 50-60. It
happened today also?
Another thing my engine is running very lean at high MAP with
the mixture knob all the way rich? My exhaust inside changed from
being wet black to almost shiny clean. The white prop has no trace of
carbon. I think i should change the injector programing on mode 3 ? I
wander if Dave or steve had similar experience?
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