If you didn't know already there are multiple types of Dynos in Malaysia and each have their quirks and differences. The "heart breaker" dynos are Mainline and Mustang (there's more but right now I'm only focusing on those that I know are in Malaysia). These dynos have heavy loads resulting in lower HP numbers but usually on-point AFR tuning on and off-load. Tuners have mentioned that Mainline dynos are generally safer as there's more parameters to monitor when tuning. Dynojet has two types of dynos in Malaysia, 2WD and 4WD. To my knowledge only GTAuto Sunway has the 4WD and is the only 4WD dyno in Malaysia. I could be wrong, if you know of any others please share. Dynojet numbers usually are 20-30% higher than Mainline, meaning if you have 180bhp on Mainline, chances are you'll get over 200bhp on Dynojet dynos. The load on Dynojet machines are adjustable like the others but usually is much much lighter than the heartbreakers hence the higher numbers. A lot of average Joes out there don't know of this difference and blame headbreaker dynos as being inaccurate and all that but personally I prefer Mainline purely because of the close-to-perfect results it gives tuners (in terms of AFR, humidity, the heavy load simulating on-road conditions, etc). Having said that though if the tuner is aware of the differences in dynos and tunes with that in mind regardless of whether it's Dynojet or Mainline, a good tuner would be able to set up your car pretty well. There's also hub-dynos where you take out your rims and the dyno connects directly to your hub and I hear results are similar to Mainline. I've never come across a hub-dyno but I heard there are a few around. Whats your take on dynos and why?