[96stanggt]

First off congrats on the new mods! The first pulley I went with was a 2.90 and it was a ton of fun! Dynapack dynos typically read higher than Dynojets and Mustang Dynos. They are bolted to the hub and take away the parasitic loss of the wheels and tires on a roller. Basically the only dyno you can really compare numbers to numbers is the Dynojet, that's why it's the accepted industry standard. Mustang Dynos and Dyno Dynamics dyno are load bearing and should read lower than Dynojets if loaded correctly, they are better tools for tuning but the numbers won't always be consistant as they rely on the user loading them correctly.

Originally Posted by DaveMan

Why are the numbers so good? I've read that the Dynapack MD-4000 reads even lower then a mustang dyno.

Originally Posted by SmokinCobra420

yeah im now thinking about my tuner and whats wrong, cause i run a BF 2.76 with bassani catted x and cat back, with a jlt cai and i think he said 18-20 timing, and on a mustang dyno only made 480 tq 440 hp, did i get screwed or what?

Those are about right, maybe even a bit high, on a properly loaded Mustang Dyno.

Originally Posted by 03dsgcobranc

upper pulley cars with exhaust/CAI typically make 420s-430s on a TRUE reading mustang dyno.

Agreed