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Old 10-20-2019, 02:39 PM   #891
NSFW
Scooby Guru
 
Member#: 140444
Join Date: Feb 2007
Chapter/Region: NWIC
Location: Near Seattle, WA
Vehicle:
05 Stage Free LGT
ATP 3076, 6MT, AVO FMIC

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I wonder if the spool is really going to be similar, though. Garrett's compressor wheels are steadily getting smaller, but if you look at the compressor maps you can see that they are have to spin them faster to compensate for the smaller diameter.

I'd love to see a pair of 3rd-gear data logs comparing a current turbo to one that it replaces. Or any form of apples-to-apples comparison, really.

And +1 for the taper in the dyno chart above being a non-issue. A handful of people have told me over the years that there was no point revving my old GT3076 to 8000 RPM, and I always suspected they were wrong... but now that I've been running it that way for a few months, I know they were wrong.

Shifting to a higher gear costs a ton of torque where it really matters (at the wheels), so it makes sense to rev a lot higher than many people assume from just looking at dyno charts.
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