600SCI owners
05-24-2008, 07:46 AM
#21
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05-24-2008, 03:00 PM
#22
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Thanks
05-24-2008, 03:05 PM
#23
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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
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05-26-2008, 10:52 AM
#28
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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.
05-31-2008, 08:49 AM
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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.
05-31-2008, 09:32 AM
#30
the Flightmaster
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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.
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.
