like keisukosan said.. scare it will lag more than vj23.. unless u had bigger piston, than there should be no problem in term of lag i think..
other solution is if u can hybrid the gt2876r compressor with the hotside similar to the size of standard vj23... u'll definately have the advantages of the gt..
GT2876 is just slightly bigger than B8 210 Turbo. Turbine housing of GT2876 got 2 = AR0.64 SR20 / AR0.86 SR20.
GT2876R turbo compressor wheel is bigger than B8 210 turbo = 3.7mm
Shaft wheel of GT2876 is bigger than B8 = 1.8mm
It wont be too lag if comparing to the spec. But the turbine housing is the main point, you may use back you B8 210 turbine housing to hybrid with the GT2876.
i dunno if you guys have seen this, but i remember watching it on astro a long while ago, and now ive found a link to it online. its a real must watch, and i highly recommend it. its a little long tho, 4+ minutes...
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