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Tippy Tippy is offline
Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,715
Where to start?

It is impossible to compare the performance of one turbo over another without holding something constant.

The measure of turbo performance comparison is positive differential across the engine at a fixed intake manifold pressure.

Nothing wrong with saying I like this combination of hardware over that however to say it is because one unit is mechanically superior to the other is a reach.
I held the constants almost exactly. I had a 60-1 with a "P" trim using a 0.81 AR housing while the HX40 had a 0.84 AR housing also being a "P" trim.

Both were used with a 1 bar WG spring. I can't help the boost creep of the 60-1.

There is a difference between the "open" and "divided" housings, but the AR remained very close if you wanted to state a variable.
Old 04-16-2014, 07:12 AM
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