Average Lifespan of a rebuild 13b
 

Average lifespan of a rebuilt 13b engine.

Street driven conditions

330 RWHP on 14lbs boost..Non sequential twins

what Intercooler and Radiator?

at those boost levels the stock SMIC is garbage..


with all reliabilty mods done and she's tuned well with a safety margin for bad gas and boost spikes..

I'm guessing ur turbo's will give out before your motor does..

as long as u treat her well..

67,543mi exact....right
it really depends whats street driven to you? i know people that floor it everywhere in a 120hp civic and get 20k yet a 500hp vette will get 200+ because he drives it like a daily not a race car. you could drive it everyday and never need/want to get into boost but still have 330hp on tap "if" you want it and get 100k miles. on the flip side you could flog it like an indy car day in day out but know you could get 18MPG if you wanted by staying out of the throttle and only get 15k. so lets say you get a reputable place to do the rebuild for you and you drive like a civilized human and get on it for that occasional back road spirited drive. i'd say you will get 67,543 miles out of it if nothing catastrophic happens which is probably why your doing a rebuild in the first place.
z

MY current motor had 80,800 miles on it.

i guess it was time for re build
coolant seals were going on it

I would say it depends on biult quality... Whats parts you use for it... And how you maintain it... Oil change every 2k-2.5k new plugs every 5k-7k. Fix any leaks that start as soon as they appear... And always be aware of the vitals... If you run 87-90 degrees for water temp. Then all of a sudden it starts running 90-93 take a couple minutes looking over stuff to see what could be causing it... As long as you do that the motor should last for a long time.

Chris

you can expect anywhere from 20,000 to 80,000 miles out of your rebuild.

Check this link out, read towards the bottom.

http://www.rotaryresurrection.com/3r...longevity.html

Keep in mind that motors going boom depends more on the supporting systems (fuel, spark, lube, cooling) than just the motor itself (assuming the motor was put together with good parts and assembled properly). Also, things like one bad tank of gas and if you're tuned on the edge with no margin for error, your motor is history. As long as you keep it operating w/in it's envelope (keep it cool and lubricated properly, don't overboost, tune it with some margin) you're good to go :)

Its more times than not the owner that decides teh life of the engine, not the engine itself. Nights are getting cooler, and I bet several people read this thread that are guilty of letting their car boost spike or creep "just" 1-2 lbs over normal and for the stock ecu guys "just" to 11-12lbs. The rotary isnt very forgetting. It never fails, every year between september and december you start seeing several blown engines and blown engine cars posted for sale in teh classifieds, or see more "I think my engine is blown thread".

I cant remember who posted it on the forum years ago I just remember it was a respected member that said something like "it is usually the loose nut behind the steering wheel that causes the most damage."

I watched several fds this weekend drive over 1000 mile round trips to our event, road coarse their cars, drag race their cars and drive them home with no problems. There are several factors that determine how long the engine will last, for a 330 rwhp motor, I would imagine somewhere between 25-40k if maintenance properly, easily capable of lasting longer.