Originally Posted by
waterrockets
You can't test your FTP w/out a power meter.
You can time a 20+ min climb all out and use one of the power calculators like analyticcycling.com to estimate the power you put out. Weight yourself and your bike and gear accurately. 95% of 20 min power is a good estimate for most people. It's not the same as a power meter, but it will show you if you are improving.