On the 2 strokes, the response is better with the 2876 than a 2871 .
Why ?
2 strokes NEED large amounts of air to have good response, low turbine rpm and small compressors do NOT provide this.
when we use the MisMatched turbos on 2 strokes we uncover yet another BETTER way to make them respond and make power.
2 strokes NEED backpressure, and demand large compressor flows. so 30 series turbines though nice on 4 strokes are poor choices under 1. liter on a 2 stroke.
Now making 3 hta wheeled 2876 for us, we shall see in sept at Dynotech how they compare.
the shootout will be on a 860 doo, 2876, hta 2876 and 3071 hta.. the goal is 400 @ 36 psi..thats 44 - 46 psi in the pipe
Though 4 strokes don't like these turbos , 2 strokes most certainly do.
lag is part turbine rpm and part airflow UNDER the window of best turbine rpm. these funky " got no home " turbo sizes are just what the good doctor ordered..response on the 800 twin doos is better, 2 psi @ 2800 rpm..2876
2 psi @ 3600 rpm with the 2871.. lest we not forget the reduced charge temps with the larger comp body .
Gus
2 good guys got 2860's from the azzhat halverson,, they wont even build boost period over 7000 feet. not close to enough compressor flow for the current crop of higher port timed 800 from cat and doo..
test test test.. then once you have it perfect.. someone finds another level of performance..
