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if you have a stg v dyno that is the same as the stage 5 average, then you should really use that chart to compare to your 1420's, otherwise it could be misleading. i don't understand why it would be that your laggier stg. 5 dyno is the less accurate one when your first one precisely fits the average of multiple other stg. 5 Z's. i think a better explanation than "different dynos" between your two different stage 5 charts is that something happened inbetween the two dynos that reduced your horsepower... boost leak developed, filter got dirtier, plugs had more carbon buildup, etc. etc. this again would explain why your second dyno is lower than expected, again giving the impression that 1420's have the same lag as stock. if you have the time or inclination, it would be of great benefit to everybody if you went back to the original dyno where you made the same power curve as the stage 5 average to dyno with your 1420's. i'm not trying to be argumentative here... i think it would be a wonderous thing if 1420's had the same exact spool up as stock turbos, and i'd pull my own engine out and change my turbos if it can really be proven to be true, but i'd really like to see the data. lastly, i'm not sure what point you're trying to make about "sea level dynos"... if all of your dynos are done at the same atmospheric pressure, then they should all be directly comparable. am i missing something? i am very interested in analyzing this further. maybe you can e-mail me the dynos that we've been discussing so that i can take a closer look at them, and we can figure out whether this is really true together. thanks!
:Prior to rebuild my compression was around 160 all cylinders and turbos in good shape. I have dynos of my stage 5 doing 365 rwhp and following your "stage 5 average" perfectly, however personally I dont think they are accurate. Plus all my dynos are at sea level which I think as discussed a few times here makes a fair difference to results. If I went back to the same dyno and redyno'd then it would follow your stage 5 curve exactly. The point though is on the same dyno it follows the curve of the stock turbos exactly, hence my claim it spools as well as stock.
Bernie, U.S. sales rep for... 
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