Thread: No boost?
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Tippy Tippy is online now
Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,714
IIRC, compressor scroll is about 7.5 to 8". Weight doesn't seem any heavier than the 60-1 I had before but didn't weigh to confirm.

With no boost controller, T4 0.84AR divided scroll with single WG, and doing a 4th gear (G50, 1.15:1 4th gear) roll on, was seeing 1-bar by 3,600 RPM.

Now, if I had did this test in a 930 in 4th (which is significantly higher geared), I'm sure it'd be a decent amount quicker boost onset.

I believe running a truly divided header/WG circuit, a .70 to .64 AR, and boost controller (aids keeping WG closed longer to target boost), this turbo would spool lightening quick.

Point is, I think sub-3000 RPM to 1-bar is achievable with a HX-40 and that's pretty good for a T4 footprint using a "P" trim turbine wheel and journal bearings.

Last edited by Tippy; 11-12-2013 at 08:29 PM..
Old 11-12-2013, 08:23 PM
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