getch vs ET vs desktop dyno

[speeder]

I was just wondering if ya\'ll have compared your ET\'s with Gtech pro and desktop dyno. With my setup the desktop dyno predicts 510Hp. When I ran at the track I ran a 13.9 at 102 (420Hp), but at the same run I had my Gtech on and it said that I ran a 13.5 at 108.8. If you go back and calculate this then, it gives 510HP. So I was just wondering what others have found. It is defintely interesting to me, since assuming ~15-20% loss with auto tranny the numbers seem to be related as HP at rear wheels and at flywheel (flexplate).

[rudedogg]

the desk-dynos really deal with specifics that the real world may prove wrong,they are pretty accurate though.i have had great success with the g-tech as long as you have it mounted at _0_ you should be on the money,my g-tech showed a 13.56 and the track clock flashed a 13.58 @houston raceway,15\'above sea level,now i am at 2700\' above level different car i have run 14.4 and the track will light up 14.5 so there are plenty factors to ruin our e.t.s but i think by far the g-tech at the track is your truest,real life test.