600SCI owners
 

Just curious from owners whether your happy with the power or wish you went with more/less?

Good luck finding anyone on this site wanting less power....:cool-smiley-027:

:D:D

Are Those Intercooled

Yes

I had them in my '06 42X. They were some of the first ones. I put just under 100 hrs on them and they NEVER missed a beat. I'm not sure if the upgrade was really worth it due to cost, premium fuel req'd, fuel consumption, etc., but they sounded AWESOME.

Good engines

Not to try and throw this thread off topic but i was wondering what would be the advantage of buying a 600sc versus buying a 525 and putting a whipple on it?

something in the work's for more powre :)

Well, the advantage for the 525 with Whipple is power, it's a monster, nearly 800hp. Disadvantage, reliability. Not that it's not reliable, but theres no question that a 7.5:1 motor, with 4psi of boost is extremely robust and durable. But, with the 525, we've made 1030hp on a 100% stock engine and its lived, so I can tell you that motor can sure take a beating.

525 is a great engine. I've run the pizz out of them and they keep going

Seriously, just think, we took 2 motors that had 70hours, installed the blowers, 12psi of boost, 110 octane fuel, made 1030hp @ 6000rpm. Ran 5 poker runs, basically as hard as you can run them. That is truly amazing! Heat exchangers had some trouble keeping up at that power level, no problem at 800, but 1000+ was a bit much.

Thanks,
Dustin

the 600sci & 700sci are the same engine.. with the 700 a smaller pullie & intercooler & computer bump.

correct?

Thats amazing. I think (it's a little fuzzy due to the Turtle Bar :)) we talked about this at Havasu last year. How many boats do you have running this set-up Dustin?

And, in the MOST respectful way possible, tell your sister hi.

(Phuk it, I've edited the dam thing 3X trying to come up with a nice way to just tell his sister hello, nothing more, but none of it works. Jeez :))

Ha ha, ya, I'll tell her.

Only 3 dual motor boats are running that, but 2 are racing them.

Cam is different as well, but other than that, your correct, same block, pistons, oil and water system.

Dustin

Who's racing them?

In P1, SeaRex but they're not running that type of power. Then team Taboo is running SC's, but again, not that kind of power. 1000+ was for poker runs. There are 2 other teams in Europe running them, but they're doing their own thing so I'm not sure whats' going on or what boats they're in.

Get used to it
 

Dustin,

The people I have spoken to with 600's love them, but they are totally used to the power and wish they would have bought a bigger motor. If you are working on an upgrade for the 600, I think thats a great idea.



Gary

I had the Merc. 600sci for 3 years in my Y2K with no problems at all, One Great Motor and Whipple Super Charger !!! I just sold the motor for a bigger motor. I wish I knew there was a possible upgrade coming for the 600, perhaps my plans would have been different.

But the biggest advantage is you get the NXT drive with the 700 package

Dustin..anything for the 700's yet. Thanks Jeff

Kicking around the idea of a "blower swap" like we do on the car kits. We do this on the Ford Cobra, Lightning, Ford GT and Shelby GT500 with great success. Just a simple SC change and thats about it. Cooler air, slower blower speeds = more power. We have a new 4.0 Liter supercharger which is significantly larger. Thinking that and possibly an intercooler upgrade.

Thanks

Kicking around the same idea, blower swap, IC upgrade package, etc. It would be a simple bolt on, just hardware. 700sci might actually benefit even more because it's dealing with higher boost levels and higher temps, meaning the bigger SC will really lower manifold air temps.

Dustin

Certainly right about that, or even the option to go to #6 which I really feel is the way to go.

250hp and lots of $$$$$:D

I'm guessing that the +250hp goes to the 525 and the $$$ are attributes of the 600??

500efi could be 800+ if I had the 525efi I would be upper 800easy. I would think the 600 hp would be more that a10k option over a 525?

We had 600sci's with bravos in a 38 Fountain, I always thought Mercury over rated their power from Mercury not sure they were making 600. Never heard anyone putting one on a dyno. I think Mercury was worried about the Bravo drive package behing them and having to stand behind them. The only reason I say that is because, the same boat with 525's ran within 2 mph on the top end. The 600's accelerated the boat faster, but not much difference on the top end.

Is that the OL with the 5.0's on stock 525's? If not how are those 525's doing with those big Whipples......just wondering about the longevity since the motors are bone stock.

I´ve just swapped my 525 for a 600. I was also told that the difference might not be worth the extra cash.

There is definitely a difference in power, and a massive difference in torque.....

It could well be that this torque difference is less significant on a twin installation, but on my 26 foot single it is a world!
The 525 starts up like a Nascar motor and sounds more racey around the dock (higher compression, hottter cam). Once your out on the water, though, there is no question who is boss! The mid range acceleration and throttle response when throttling in rough water has the 600 making you smile.

I`m up about 5 mph (running a 32" bravo instead of a 28") and still have more acceleration than before!
Fuel economy seems to be about the same as the 525(because of the longer prop pitch).

Powerboat tested the 28 Bullet (low decked 22° stepped hull) with a 525 and a 600 and saw 10 mph speed increase (up to 89 mph) and better economy. That convinced me to push the button, and I am very happy with the results on my less efficient, but still fast, 25 Outlaw.

The 525 was perfect, and after 157 hours and two seasons showed 11 bar compression on all eight. No leaks, no scratches, and is still worth alot of money resale.

That was done for a poker run, but it ran so good, it kept going to others. The ones racing are in other boats now. Those motors were running fine, but customer built some new motors and took sc's, electronics, etc. all to new engine.

Dustin

A friend of mine has 600SC's in his 51OL.... They just got rebuilt at about 200 hours.

Over the past couple years that he's owned the boat this is what I know.... 2nd season he had to replace the CMi headers, then rebuild one of the blowers, then one of the ECU's, then for some reason the engines wouldn't make boost and the belts were somehow slipping and a couple of outdrives and a partridge in a pear tree. He installed Teague drives and they haven't stood the test of time either but they may have been driver error....

When the engines were rebuilt they were in OK shape. He didn't need to do it but wanted to do it anyway and it's a good thing he did because one was about to drop a valve... Had it been started one more time it's possible the valve would have dropped...

The owner of this boat uses it EVERY weekend and maintains the boat with no expenses spared... He's had another 51OL before this with 575's, a 45 Sonic with 500efi's and bulldogs before that, a 35 Sonic before that..

Just ran my 42 PR this evening with a new ECU program for the 600sci and picked up 4 mph and much better acceleration. I hit the limiter at 5500 as I started playing with the trim and went into guardian so I'm sure with another 2" of pitch there's another 2 mph to be had. All in all a very cost effective upgrade.

that was from just a reprogram?map must be way off from the factory,or maybe it has a electronic wastegate that lets it build more boost?Impressive #'s!!!

All Mercury supercharged EFI motors (except for 575) have boost control. Air fuels are very good stock so tune is good, boost/timing is very conservative.

Dustin

Who's ECU upgrade are you using? That is a pretty impressive increase.

How is your Doug Wright running?

The DW 43 is finished and turned out to be a heck of a nice piece so it was worth the wait. Doing some mods to the rudder box and extension and should be testing again in a few weeks. Since I have to wait on that I also have Chief swapping out the blowers for some of the new magnesium 5.0 Whipples and MOACs.....you know how it is 2 hrs on the water and you already want more!!

we have upgraded our 600 SCI
now 711 HP

An Italien Company cracked the PCM 555

You just need
cam change
pully change
and reprogrammed ecm
two versions available
one with limited torque at lower RPM for Bravo Applications

so far one of the distributeurs in the US is Raylar

www.raylarengine.com

Contct Ray for details

I have cam and pulleys in stock. But reprogramming without cam/pulley is far easier than pulling that motor apart.

Dustin

Does anyone know what the max boost on the 600 is if the computer isn't holding it back? It seems to me that a pulley and reprogram would be the way to go. I do like the fact that stock it is now rated for 87 octane. Just need a dual program--one for cruising/trips and one for high octane/boost max power :cool: