Background:
5+5 design
Now I am thinking that the IS38 rotor design isn’t very good for increased power, so I want to test a revision to the IS48 running this new rotor
I am looking to reduce back pressures at the turbine rotor and free up hp to go to the crank
The blade profile is similar to what Garrett has on their G-series, but they have staggered heights
I have re-explored a BMW Stage 1 using this new staggered blade, and the backpressures are better
I don’t think the IS48 rotor is well suited to exhaust mass that is well above the stock levels
The new turbine wheel is specifically to get to that magic 400. But it’d be useful to know the pre-turbine EBP on the current one.
the new rotor is the same size/shape. Just a change of the casting to the 5+5
Test Results:
