1000hp SC engines
 

OK, I need some input from anyone that can help....I am seriously considering buying a boat with twin 598 cids / 1000hp blown engines with 10 hours since rebuild....I need to know from anyone that has had engines these big/powerful what to expect as far as reliability, maintenance, hours of service, etc., etc. They are operating at approx. 8 lbs boost. What would I have to do to de-tune them to about 800-850 hp? Thanks for any help in advance.

Re: 1000hp SC engines
 

Dammmnn! Tell us more. :)

Re: 1000hp SC engines
 

he,he,he, he....stay tuned for more :)

Re: 1000hp SC engines
 

High horsepower=high mainteneance.
If you don't run them at WOT too long, and you maintain the valvetrain properly, you should get a decent amount of hours on them, if they were put together correctly intitially.
De-tuning should be fairly straightforward. Simply change blower pulleys to reduce boost and re-jet/tune the carbs. Timing might play a role as well.
I would not be afraid of 1000hp with this many cubes, especially if you reduce boost slightly.
Do they have intercoolers?

Re: 1000hp SC engines
 

SO,

the engines have superchillers and running around 8 lbs boost....never had anything this big before so I'm a little gun shy about the engines....I do not plan on a lot of WOT, but wouyld like to be able to use the boat every weekend probably a lot of 3,500-4,000 rpm running....what do you think?

Re: 1000hp SC engines
 

I'm certainly no expert, but I would not be afraid of them at all.
Just be SURE to change oil every 10 hours or less, drive oil at same interval, and check valve springs every other oil change.
If you aren't willing, or don't have the facility for this kind of maintenance, I would give it some more thought.

With 4-6lbs of boost you could still make good power, and have great life from the engines, I would think.

Re: 1000hp SC engines
 

thanks, that's re-assuring.

Re: 1000hp SC engines
 

Make sure the motors have that few of hours on them. Ask for dyno sheetsand talk to the builder. I bought a boat last summer with 1150's with 15 hours on them. They had more like 108 hours and only dynoed at 916hp. Would hate to see someone else get burnt like I did. ( $20k to get my motors to were they were suppose to be) Heath

Re: 1000hp SC engines
 

These are 580's with 1000 HP SC'd, chilled Dry Sumped. 1000 is nothing for a set of 580's. Theya re pretty dependable if you keep the drives wet and don't over rev. If they are dry sumped it will definitely help keep oil in all the right places when the high R's hit.

Summer is giving you all the right info. Dependability is based on who wrenched them together and how that 10 hours of running time was spent and how you maintain and run them. Valve trains check MAXIMUM every 100 hrs.

You can also reset. the chips to lower the rev limiters and RPM's, Shorten up the throttle cables,

Good Luck! :)
I

Re: 1000hp SC engines
 

thanks for the info 39, those are beautiful motors

Re: 1000hp SC engines
 

Awsome motors!!!!

Wouldn't the easiest way to de-tune a blower motor is to change the blower drive to a lower ratio? Something closer to 1:1 or less.

Re: 1000hp SC engines
 

what kind of outdrives are on the boat?

Re: 1000hp SC engines
 

Hi Frank, first find out if they have solid rollers on them, if they do they are in most cases 262 duration or more on that set up. I would remove the solid rollers and put hydraulic roller with a duration in the 230`2 to 240`s and then this would de tune your motor. You need to change the valve springs as well, it will cost you about 1k per motor in parts to change over. I`m building a 598 and a 632 ci motors at the moment, so feal free to ask me anything.

Albert

Re: 1000hp SC engines
 

Hi Albert, thanks for the input...I'll certainly keep you posted....heck, maybe even see you out there in P4. :rolleyes:

Frank

Re: 1000hp SC engines
 

owning a boat with big power can be a lot of fun or a load of problems. depending upon how many hours you put on in a year, you can expect to at least redo the top ends each year (approx. 50-80hrs depending upon how hard you run the boat). if you don't, you are jeopardizing the entire motor. you shoud get close to 150-200 hrs from the bottom ends.

my only piece of advice is that unless you have the cash in your pocket or your account to replace an entire motor, you are in over your head. affording the boat payment is one thing, but affording the maintenance is another. staying on top of the maintenance is costly, but not near as costly as replacing an entire motor because one of the needle bearings siezed in a rocker arm.

having said that, there is nothing like the scream of a set of blowers in your ear.

RWD is an excellent boat (assuming this is the boat you are looking at)!! :)

chad

Re: 1000hp SC engines
 

One point to ponder. Some say 150-200 hours on the high HP motors. Others say 500-600 hours, ie. DMAN. His Pfaff Motors had waaaaaaaay over 200 hours on them at time of rebuild. I suppose it is how they are serviced and maintained. Sam

Re: 1000hp SC engines
 

what power were DMAN's angines?

Re: 1000hp SC engines
 

All good points ..
I like the way MYPANTERA28 is thinking . If you want them de tuned anyway , GET RID OF THE SOLID ROLLER CAMS !!!! Then you have NO worries !

The only bad thing at that point is NO big engines should idle for any longer then you absolutley have to . These engines are set up with "Loose " Pistons to allow for expension . AT idle they are cold and loose and allow alot of fuel to get by them and into the oil . Thats why you need to change the oil all the time ...

Also you must pressure test intercolers regular to amke sure they are not spitting water into the oil . In my opinion , there should be NO water going through the intercoolers at idle or very low rpms . If it does it creates a lot of condensation and agin gets in the oil . ALso I think it idles better that way . Just my .02... Joe

Re: 1000hp SC engines
 

900-1000 Plaff's.

LS JR.

Re: 1000hp SC engines
 

every day I learn something new, thanks everyone......keep the info coming....I am planning on seeing the boat this weekend......keep you all posted.....

Re: 1000hp SC engines
 

Good luck Frank, ask all questions up front in regards to the engines, and parts in them. You want to know the quality of parts in them in order to justify the day you open the motors you wont be surprised. Find out the top end boost that they have been using and look for a knock meter in the panel for each engine.

Albert
305.310.0911 cell
305.882.7000 ext 3201

Re: 1000hp SC engines
 

Talk to WickedWon he'll tell you about the love that 1000HP blower motor can bring.

Re: 1000hp SC engines
 

I have a Pfaff 565 Q-rotor Whipple 1,021 hp at 8# and 1387hp at 18# They say 250 hours springs and oil pump and then 250 more for rebuild

Re: 1000hp SC engines
 

Let me just say that Jim WILL give a hell of a ride in WickedWon. Awesome. :cool:

Re: 1000hp SC engines
 

interesting thread. did anyone mention the fact that big blown gas engines are a pain in the ass? 10 hours since rebuild? well, then it's probably time for another one of those... :D

Re: 1000hp SC engines
 

Although it's for totaly different reasons, Fabio has a simple way of achieving this, he has the intercoolers on his Seatek race boats fed by a seporate scoop/water pick-up, and no pump, completely independant of the engine cooling system, this way, the intercooler gets force fed plenty of cool water, but only when the boat is at speed. in his case it's to do with warm up and reducing smoke from the high HP racing diesels, but the principle would apply perfectly to your point.

Re: 1000hp SC engines
 

Although it's for totaly different reasons, Fabio has a simple way of achieving this, he has the intercoolers on his Seatek powered race boats fed by a separate scoop/water pick-up, and no pump, completely independant of the engine cooling system, this way, the intercooler gets force fed plenty of cool water, but only when the boat is at speed. in his case it's to do with warm up and reducing smoke from the high HP racing diesels, but the principle would apply perfectly to your point.

Re: 1000hp SC engines
 

I hear it's the best damn dune and beach sightseeing cruise in the Midwest !!! They need to get a liquor license though .... No Cervesa !?!?!? :D

Re: 1000hp SC engines
 

Sorry WickedWon can't post at this time. He's to busy in the bilge, he'll get back to as soon as possible. ( Probably about November). :D :D :D

Re: 1000hp SC engines
 

Big HP motors are only as good as there creators




Rick OSG

Re: 1000hp SC engines
 

thedonz,
Like everyone else said, maintenance, maintenance, maintenance. I just had Tommy @ CHIEF ENGINES build me a pair of 900-950's @ 600+ cu.in. @ 5lbs of boost. Since I was starting from scratch, we went with big inches and low boost for longevity and they idle like a HP500. Should see 400 to 500 hours between rebuilds the way that I drive the boat, cuising at 3500 rpms 99% of the time.

Like others have said, find out as much history on the engines as possible. 10 hours is just one GOOD weekend, without hour meters you really don't realize how fast the time adds up. Find out what kind of rocker arms are in them, lifters, compression ratio, valve seat spring pressure, etc. Find out how much total time is on the superchargers, Marv @ THE BLOWER SHOP says about 300 hrs between rebuilds.

There is alot to consider when buying a boat with this kind of power...................
But when those blowers are singing and you're flying off of waves, there is no better feeling in the world, just ask Nauti Kitty, he IS addicted.

Good luck in your venture and happy sailing (through the air)

Robert

Re: 1000hp SC engines
 

Robert,

Thanks for your thoughts. Love your boat, is Tonto at Chief now? I saw a beautiful Apache in there about two weeks ago.....only saw the front so couldn't see the paint scheme in the rear....was that Tonto? I plan on doing most of my running between 3,500-4,000 rpm........hope I can get that many hours out of them. Did you go solid lifters? These engines have solid lifters. I'll detune them after a few months time.

Frank

Re: 1000hp SC engines
 

Frank
No, Tommy likes to use hydraulic roller lifters in his engines. With the large cubic inch engine, you don't have to run as an aggressive cam shaft. My old engines had solid flat tappet lifters in them and even at 130+ hrs they were still at .020 lash.

Yes that could have been my boat. I left Tommy's with it on Sun. the 18th to bring it back up here to Ga.

Robert