Re: EGT Limitation
the turbine ar is a GT28RS 0.48ar on the T3 turbine housing.
I'am seeing:
/wo WM: 898°C @ 8030rpm / 220kPa @ Lambda = 0,769
/w 50/50: 906°C @ 8065rpm / 221kPa @ Lambda = 0,776
950°C is my personal limit, but i would feel a bit better if i can keep it a bit lower then that.
Because i know that the material of my exhaust manifold is not rated for that kind of temperatures and i would like to avoid cracking. But up to now it hold's pretty well.
Also my goal for this year would be to run more in the region of 12:1 or 12.5:1 if possible afr, but then i would definitly be above 950°C.
Also i'am planing for more boost, when i've fixed my ignition misfire issue.
What is your EGT limit?
I'am injecting 140cc constant 50/50 WM by weight.
This gives me a ratio of water to fuel of about 24%@4000rpm/200kPa falling to 8,6%@8000rpm/230kPa.
My question to the experienced guy's here: Is there anything with water injection which effects EGT's directly besides the normal "more advance, richer mixture" things which also are valid on a non-WM injected engine?
I thought about a second stage (for high rpm) of pure water at the TB or direct port inj. but this makes the setup much more complex and i would avoid any kind of unneccesary complexity.
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