How long at WOT?
 

Whats the rule of thumb for whats safe as far a running WOT for how long?
Thanks

when you run out of gas,its time to let up.lol:evilb:

:ernaehrung004: If your choice of power is 2-cycle outboards, they love to run WOT all day long.

Might help to know RPM and speed,

502 mpi's so about 5000 rpm's around 70ish

how long at wide open
 

until you hear a "POP" sound:party-smiley-004:

I had a pair of zz4's from GM in a 260 stinger. The guy said one year, No questions..... Rodney King didn't take a beaten like they did!!! I ran that boat 5500rpms on ALPHA's for 65 miles straight.. Never let off. I always ran 5000rpms every where I went. I sold that boat in 2000. The guy that owns it now has only rebuilt the carbs... It has to have 600 hours on it... HARD HOURS..... 502's same thing. I know guys with 300 plus hours .. HARD HOURS.. We call them Dog years. People look at the hour meter and say... wow only 100 hours..... Not knowing it was WOT.. The harder you run it.. The less hours it takes to get there!!

Assuming you are not talking about over revving but running flat out- like on a smooth lake- not jumping in and out of the water.

My rule is that Ill only run any of my engines (Ilmor 710 & 406 sbc) at WOT until I cant keep the oil cool anymore.

As long as the temps are good I'll keep the hammer down.

I have not yet found that point on my Ilmor 710, but I haven't spent much time on smooth lakes.

Ive got an Aeroquip oil cooler in the small block boat and Im not sure how the Ilmor keeps its oil cool, I haven't paid that much attention to how - just monitored the gauge

Youll get tons of advice on this point.

Uncle Dave

Im still laughing at this.

(even having lived through the LA riots)


Uncle Dave

I read someplace in a merc manual 15 mins wot max. I think the oil temp rule is a good one.

Definately keep an eye on the guages. I would see the oil creeping and dump the drives a little to get some more water through... Tempatures on everything is key too....

Run it for a while to get a feel for its limits. Some boats heat up too fast and you can't stay in it.

But if your lake or bay racing once you hammer down and he who pulls away 1st: is declared the winner...:drink::drink:

In my old Talon the WOT limit was usually set by the boss!:party-smiley-004: She finally figured out that pulling leg hair got my attention! Damn that hurt!!:eek:

All depends on how big the wallet is ........

First correct answer here.

as long as the wife is holding on to the (O ****) handles with a smile on her face your safe

Who the hell wants to run an engine at WOT for extended periods of time anyway.......????????????????????

The computers on the 496HO's and others will tell you how many hours were spent at what RPM. Also how many time the engine has been over heated. I'm sure some other things too.

Yep - and they look like this ........

They tell me to run my diesels at 90% for cruise .... Max RPM is 3800 so cruise is 3420 or so -which is about 35 mph - works good for me...... when the damn things run right..... oh .. and over 2mpg in a 9000lb tub ....

Until anything on the gauges isn't normal even the slightest change means something is up!!!!

Me too:drink:

Until Something Goes Boom!

Amen.

If you can run wide open all the time, you need some more beans!

Until you get where your going. Pretty pointless after that:drink:

...until they are all behind.

What if the only gauge change is the speedo and it tells you that you are slowing down !:evilb::evilb:

do ya think its too late ?:drink:

RHC

Good point!:cool:

hahaha been there before :ernaehrung004:

That always worked for me :)

I WOULD BE A LOT MORE CONCERNED ABOUT THE OUT DRIVES THEN THE ENGINES.

A GOOD ENGINE WITH NO ISSUES REALLY DOES NOT KNOW THE DIFFERENCE BETWEEN 3500 RPM AND 5000 RPM.

We ran my original 500EFI motors with 270 hours on them WOT with four people on board from Silver Glenn Springs to Jacksonville non-stop.

I had kevin Brady on board who was going to go through the engines right after that run and freshen them up and change the heads and cam. The engines NEVER missed a beat and that is close to 100 miles if memory serves me right.

He went into the engines the following week and they looked GREAT!

However my outdrives were chalky white and one failed very shortly after we put the engines back in.

Personally if all is good with the engines and you have good oil, good oil temps (250 degrees or less) good oil pressure and good cooling I think the whole time limit on running WOT is B.S.

Just my experience and my personal opinion.

I think the size of the GAS tank is the big factor

I once had a mechanic answer the question regarding my Merc 2.5L Offshores to think about it as a light switch, they only have so many switches in them, adn the more rpm's the faster you get to the end.

WFO till chit breaks...then fix and WFO somemore:drink:
Just watch out for jetski's and blowboaters:angry-smiley-038:

Someone told me most likely I wouldn't survive a wot test.

VV,,,,if i ever meet u ,,we need to do that test with your boat . I would like to find out. LOL:ernaehrung004:

So your my Huckleberry.:ernaehrung004: You welcome on my boat anytime my friend.:ernaehrung004:

I will take u up on that !!!!

Happy Eastern.

until ya gotta take a leak

I ran my nova with the 420 that I built for over 100 miles on a poker run over 5000rpm's and never missed a beat. Many others including a engine builders boat did not finish and lost engines. The only place I did stop was locking thru a dam. I haven't done anything like that with my stroker 496 since I only have 7 hours it