how long should a motor last

[jet454boat]

how long should a well built chevy 454 motor that was professionally built last?

[Danhercules]

About 1/2 as long as a Ford. Just kidding, makin a funny!! :p :rollside:

[wet77]

Now thats the million $ Question :argue:
How much money do you have :rollside:
Any well built engine will last you a long time in a boat with regular maintenance and the harder you run it the more maintenace you will have :crossx:

[LakesOnly]

how long should a well built chevy 454 motor that was professionally built last?Anywhere from 90 seconds to twenty five years.
LO

[67weimann]

Anywhere from 90 seconds to twenty five years.
ain't that the truth...lol :220v:

[Riverat84]

Anywhere from 90 seconds to twenty five years.
LO
BEST ANSWER YET!

[JESSE]

till you blow it up :220v:

[SmokinLowriderSS]

About 1/2 as long as a Ford. Just kidding, makin a funny!! :p :rollside:
and about 10x as long as an olds. :D :D :D
(you're not the only "stirrer" Dan. :p )

[SmokinLowriderSS]

Anywhere from 90 seconds to twenty five years.
LO
Yea, that's about right, regardless of WHO built it, a "shop" for you or you. Done wrong, about 90 secconds.
Done right (and taken apropriate care of), wring it out for YEARS!

[Squirtcha?]

how long should a well built chevy 454 motor that was professionally built last?
What a bunch of jokesters eh? Ya gotta love these guys.
From some of the machinist and builders I've spoke with they seem the feel that a motor should be freshened up every four years or so. I'm going on the assumption that they're talking about daily use motors (not a full race deal) everything being in good shape and it not be in any need of machine work etc.
Rings and bearings replaced. My guess would be that a thorough check up would be in order and possibly replacing cam, lifters, and springs if not in spec.
I'm on my fifth season with a 500 hp BBF. I've run it real hard and it's gone through lots of bottles of nitrous. I ran a leakdown test on it a month ago (or so). All cylinders passed. I know I'm pushing it, but there's no money in the budget for a rebuild now.
I'm not an engine builder so take the above for what it's worth. Second hand information and speculation at best.

[396_WAYS_TO_SPIT]

What a bunch of jokesters eh? Ya gotta love these guys.
From some of the machinist and builders I've spoke with they seem the feel that a motor should be freshened up every four years or so. I'm going on the assumption that they're talking about daily use motors (not a full race deal) everything being in good shape and it not be in any need of machine work etc.
Rings and bearings replaced. My guess would be that a thorough check up would be in order and possibly replacing cam, lifters, and springs if not in spec.
I'm on my fifth season with a 500 hp BBF. I've run it real hard and it's gone through lots of bottles of nitrous. I ran a leakdown test on it a month ago (or so). All cylinders passed. I know I'm pushing it, but there's no money in the budget for a rebuild now.
I'm not an engine builder so take the above for what it's worth. Second hand information and speculation at best.
Good post dan;)

[jeffroe]

well i got less than 10hrs out of mine :cry: choose you'r engine builder more carefully than you would choose you'r wife or close friends. :mad:

[nielly]

I'm on my 14th season with my BBF. It's a mild motor in my 21 Daycruiser. I run the SH$t out of it a least two to three trips a month. I use synthetic oil and routine maintenance. I have no idea how many hours are on it though. It was built by Advanced Engines in Huntington Beach, I don't know if they're still there.

[mrgoslow]

after 6 years on a 454, i freshened it up because i noticed a slight drop in oil pressure. tolerances were a tad excessive. i turned crank and resized rods to be safe but coulda put bearings and let it eat. during that time i had two diff impellors. one ran at 5100 while the other at 5400 on gm parts with KB hyperutectic pistons.

[centerhill condor]

got a 454 330 hours and 20 years. max rpm is 4200 on "AA" impeller. I've only put 100 of those hours on her. usually cruise on 3000 rpm to wherever it is I'm going.. I like the 90 second to 25 year answer best! good luck!

[SmokinLowriderSS]

well i got less than 10hrs out of mine :cry: choose you'r engine builder more carefully than you would choose you'r wife or close friends. :mad:
Same thing happened to a co-worker, who CLAIMS he had the engine built ( I think he did it himself). 10 hrs and on the DEMO RUN with a prospective buyer inside, one of the nuts on #8 con rod unscrewed itself all the way off, you can picture what happened next (a buddy of mine bought the boat/blown-up 460, I helped him dissasemble it, we found the nut in the pan).

[Floored]

I'm finishing year 7 so Smokin you should be good for 70 years+.

[Marty Gras]

I feel this question has many variables. Are we talking about a 600" motor that turns 4000 RPMs or a 460" motor that turns 6800+ RPMs? The "use" and "set up" are prime factors in this equation. For the most part I have found that 'the well built motor' has very few bottom end "wear problems",(even with the cold running temps) but the top end suffers from "use" and "storage" problems. Valve springs come to mind first, moisture, long periods compressed, and lack of proper oiling while in use, contribute to the valve spring being "the first to go" in my book. Second would be the timing chain set (belt, gear). These parts will show wear/use under the best of conditions. Third I would say valve guides/seals are the next most to fail or become worn to the point of showing performance losses. Reringing is a task that many shops offer "as needed" before they even look at "valve spring condition", or camshaft timing specs. I feel you need to "pinpoint your motor specs" then those of us who have built a few motors can give you a more accurate answer.

[455Rocket]

Hardin 330HP 454 - 620 hours - 16 years old - and still running strong...

[southwind racer]

and about 10x as long as an olds. :D :D :D
(you're not the only "stirrer" Dan. :p )
My OLDS 455 lasted 33 years!! It blew at FC5 :yuk:
We'll see how long the rebuilt version lasts.

[taylormanss]

I'm on three years,depends on how it's built,how you run it,and if ya do regular maintenance on it.

[IMPATIENT 1]

About 1/2 as long as a Ford. Just kidding, makin a funny!! :p :rollside:
BUT TELLIN THE TRUTH :crossx:

[later]

Anywhere from 90 seconds to twenty five years.
LO
I know those 460 engines are a piece compaired to 454's

[skeeter]

I know those 460 engines are a piece compaired to 454's
Could you explain "exactly" what is wrong with the 460's and why a chebby is better?

[SmokinLowriderSS]

I'm finishing year 7 so Smokin you should be good for 70 years+.
I got 25 years on the orriginal A-400 main bearings spinning an "A" 4850 NA, 5200 on Nitrous. Wasn't a thing wrong with the cylinders, rings, or valves. :)
Only did a complete rebuild to beef the rod bolts up to take the upgrades that followed and are following still. :) :) Year 2 is in the garage, running great.

[SmokinLowriderSS]

My OLDS 455 lasted 33 years!! It blew at FC5 :yuk:
We'll see how long the rebuilt version lasts.
I hope it makes a similar lifespan for ya. :)
Yea, sux to blow at a gathering. :yuk: :yuk:

[SmokinLowriderSS]

Hardin 330HP 454 - 620 hours - 16 years old - and still running strong...
I'd open the bottom end and have a look at the bearings. My A-400 stockers were DONE after an estimated 300 hrs, but, no damage/wear to the crank. It was still polished!

[GM Killer]

Are you gonna run it or stare at it? Run it until its hurt, then throw in the backup.
Generally, if they are going to have trouble you will know in the first few hours of run time...doesnt matter if its Ferd,Chubby, or god help you a Mopar. Olds is just a lost cause :D

[spectras only]

I rebuilt my 429 Ford for my 20 Spectra jetboat in 1989 , sold it to a friend a few years ago .And I'm no professional builder :) . He's waiting for it to blow up so he can upgrade to a 514 :rollside: Go Ford :argue: :p :rollside: :D