Looking for reliable hp
 

I am repowering a 36 nortech. Looking at 900-1100 hp range. How many hours should i expect before an overhaul. I've been quoted anywhere from 25k for a carb setup all the way to 80k for an efi setup per engine. Does the high dollar stuff last that much longer? I'm running asd7 drives. Will they hold behind 1100hp? Thanks.

How about a pair of 598 C.I. - 950 HP roller cam supercharged engines for $60k including CMI Big Tubes?

POT LUCK :)

For that kind of HP, I wouldn't expect to pay less than 50k per fully dressed engine and expect them to last.

Griff how many hours should 50k engines last under medium duty vs 25k engines?

Depends on who builds them, Eickert, Sterling, Teague, Boostpower, their are alot of builders. But when dealing with unkowns or locals builders, some build great motors, you have to do your homework. In the 1000 hp range you are looking at 100 hrs before you have to do something other than normal maintaince usually.

Just make sure that whoever you are getting the quotes from has a very good track record with marine hi-perf offshore engines.

My builder would probably tell you that if you're building from scratch, then stick with carbs vs fuel injection unless it already came that way. Carbs are very simple, reliable and work very well these days---that is unless you really want FI. He has built some very high dollar offshore racing engines w/EFI since the early 90's. And he is very knowledgable with the ASD's----besides having an outstanding reputation and track record. Dave Wesseldyke of WESCO Racing Engines in Jenison, Michigan www.wescoracingengines.com

How about a pair of 666 CI ,NA 900 HP 860 Tourqe at 5500 RPM on Pumpgas ??????

Fully dressed both for less then 50 K ?!

Isay the most reliable engine in the world !!!!!!!

OH and they are complette aluminum with special heads,the only thing they are taller then 10.20 talldecks .:cool:

to get that much H/P and to run on pump gas....the pin will have been pulled.....don't expect longevity....best bet big cubes, low boost blowers....

Beak boater what do you have to do other than normal maintanence ? Kaama i do like efi. I've had a 1000 hp carb blower motor and don't want that savagery anymore.
Daredevil i like the superchared engines because i can turn up boost for poker runs then dial back for everyday boating.
Ezstriper how many reliable hours can one expect from
1100hp?
1000hp?
900hp?
800hp?

I really don't see how you can build a reliable 1000hp marine engine from scratch for 25k. If you could, everybody would have them.

Since you seem to want EFI, Whipple and big cubes is the way to go. I would expect top end refresh at 100hrs and full rebuilds at 200hrs.

BTW, I have a friend with these for sale. Pretty sure they will make between 900 and 1300hp depending on boost and fuel.

http://midwestboatparty.com/forum/4s...duct=343&cat=9

EFI is always worth 5k+ more because idle, fuel economy and overall reliability "should" be better. 900 is a big difference from 1100 so you have to basically pick which direction you want to go. You can have a 1100 hp motor, which cost more, only make 900 for extra reliability.

Otherwise, a well built 900-1000 hp motor can make it approx. 250 hours before rebuild (hydr roller, low compression). 1100 would be closer to 200hours. Of course this depends on how hard you run it, but since its a Cat, it's pretty easy on motors.

SC'd motors always make power easier than massive over-stroked high compression motors and last longer. If were talking 500-700hp, then NA motors work very well, but getting to 1000hp is a bit tough, and it still does not compete with a supercharged motor. Also, going to overstroked motors limits max rpm, and your 36 Nortech will like 6000+rpm.

Thanks

Dustin i have a pair of 3.3's. with moac from some 525efi's. I understand the blowers top out at 900 hp with 540's or bigger. Is there more left in them with the use of ice injection reliably for the odd poker run say 1000 hp?

Sug,
I regularly use 3.3 Whipples on a 598 ci engine with a hydraulic roller to make just over 1000 hp (my 925 efi). I have several in the area if you would like to take a test ride. I have a pair in a 38 Hustler with 217 hrs, a carburated pair of 598's with a 3.3 with about 80 hours, and a single 3.3 efi in a 28 Nordic heat with over 100 hours. These boats are all local to me.
I have also done numerous engines for Nortechs. I've built engines for several 36 cats, 43 cat, 50 cat, a 43 vee and a 39 vee, so i am very familiar with their boats. All of my engines come with a warranty. You can see some specs and pictures at www.YoungPerformanceMarine.com .Give me a call if I can help you in any way. Thanks, Eddie.

SUG
We've seen this question many times before I've been a member and advertiser on OSO for a long time it is important that you know there are many engine builders and engine suppliers that will sell you entry level components in an attempt to undersell the competition in the sport of speed you get what you pay for I have always said if I have to build an engine to suit the customers need I will use only the components I would use for my self I have always used American made iron and now days you have to watch some manufacturers and really rely on your builder for the experience. I have poker run packages from 500-1400 hp on pump gas and racing engines from 600-1500 hp and they all use the same internal components such as crankshafts connecting rods and cylinderheads the difference is in the camshafts weather they are hydraulic rollers or mechanical rollers. Also ask what kind of service you're going to get when you have an issue.

Thanks for the information guys.