CM871 vs CM2250 bottom end

[Running rough]

...and it seems my 2250 does as well, I might have over reacted a bit by saying it is not as responsive, it is still Very responsive in what I believe is stock timing, still feels like it would blow a stock 2250 out of the water, got the turbo set where in my opinion it will almost spool as fast as the stock 2250 turbo, however it is clear to me now that this 871 turbo will build you a better overall power band with the right tune, it seems the stock turbo was quick to spool and built good low end but couldn't move enough flow for good mid to top end power, the core 2250 engine when the liner heights are where they should be with the updated xpi pump I think but still not proven, should be a not bad engine, I can tell you the stock tuning for them is nothing special and even cummins admits to that, they should just smarten up and help the poor owner operater that is stuck with the factory lemon flaws, I can promise you if the liners and block fret on my shimed up 2250 that will be the end of my liking for the cummins engine