Quote:
Originally Posted by AVOturboworld
I've been seeing here and there comments about how "tiny" the turbocharger that we use is, and I have to admit, it irks me. Because it is, if anything, on the large size for somebody doing a daily driver build on a 2.0-liter motor. OEM turbochargers are much smaller and run out of breath much sooner, while we've been pushing past 300whp (wheel, not crank) at 10~11psi on 92 octane fuel. That's still 4~6psi before the turbo starts running out of breath.
A tiny turbo would be like the ones that Subaru uses on the 2.0-liter motors in Japan (I've owned 5 of them!), which run out of steam completely at 250-270whp. On the flip side, they did spool a bit better than our setup - by a couple hundred rpm at most, though.
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I don't consider 38lb/min turbochargers as being tiny. In fact, the GT2871r flows just about the same amount of air and I don't see anyone saying that the 2871r is a small turbocharger.
On the other hand, the TD04 on my 02 WRX (gone, but not forgotten) hit peak torque at 3000rpm on 93octane on an unloaded dyno. So quite a bit sooner than a couple of hundred RPMs. Only made 240whp or so, on all fours. And torque drops like crazy after 6200rpm or sooner.
-budi