B737-800 take off performance
 

does any one have access to a boeing chart that gives the actually performance available with an engine failure? B737-800

for example, on the day; OAT 25c, airport elevation 500 feet, aircraft takeoff weight, let's say 68,000 kg. what climb gradient will we actually have if one of the engines takes a break?

i could easily find said chart in the B737-3/400 flight manuals, but am having trouble locating the new gen flight manuals.

there was a rule of thumb with the 3/400's: every 4000 kgs under the climb limiting weight at actual OAT, you would gain 1% climb gradient added on top of the given 2.4% given by regulation.

with that we could estimate our achievable performance which would imply whether we could continue the SID or not regardless of the point of engine failure, or a failure after beginning a SID and leaving the emergency turn procedure beginning point.

any one else have similar rules of thumbs?

any help would be greatly appreciated.