818Rasmus E Modified

[longislandwrx]

I imagine using a smaller A/R while speeding up the spool at the expense of reducing maximum flow will really reduce the potential of overspinning the turbine. If you are at risk of going over the choke line it should keep it in check... I think Garrett sets their choke line at 58% efficiency, your maps look like 60? close enough.

I don't think the map changes, but since you are limiting the highest speed line you look at the map differently

I bet if you called them they may be able to give you an appx speed shift per A/R. Or they'll say buy both turbine housings, one of these...


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and let us know how it works for your exact setup

Or I could be way wrong, kids were up all night.