Just wondering if anyone has run a ZZ4 longblock on a dyno?

 

They do 345 HP on an engine brake. Drive trains vary considerably in their loss, and the act of installing a motor in a chassis also creates loss from things that are on it when in a car but not when on a dyno... like alternator, power steering, complete exhaust, air cleaner, etc. Rule of thumb is about 25% less at the rear wheels than the engine does on the stand (which is NOT the same thing as drivetrain loss). So, expect to see around 260 RWHP from one in a more or less optimum installation, a little less in a more typical one.

 

to be exact here's what one of our guys from www.fl-thirdgen.org did:

mizfit creations

http://www.fl-thirdgen.org/NovDynoDay1.html

and his a/f was way rich. we've since done some jet changes on his carb. it has went a best of 13.81 right now. with 2.73 gears