Offshoreonly.com - Nordic Heat - 600sci motor upgrade

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Quote:

Originally Posted by MarkDonzi (Post 2805229)

Chris,

those are awesome results! What are you using for drives Bravo XR's? Good Luck!

Mark

Mark,

The boat has an IMCO Extreme SC outdrive on it.

Chris

Quote:

Originally Posted by redbud35 (Post 2805352)

Cool deal.
I'm surprised your boat wasn't faster to start with.

The boat was actually the fastest in the stock 600sci configuration with a Hering 26 pitch, 5 blade Bravo style prop, at 83.8 mph. This was bouncing off the rev limiter.

The reason I choose to not use this prop was because of the extremely low slip percentage of 5.5%. That and it would overshoot my target RPM of 5800. I was worried that 750+ horsepower thru Bravo XR gears (IMCO SC outdrive), along with the low slip numbers, would break my drive.

The 90.4 speed was done with a Hering 27 pitch at 5600 which is aproxomately 5% slip. I am going to take the 1.5 inch spacer out of my drive and see if I can get the slip number up, along with reducing the chine walk that starts at about 88mph.

Chris

CB-BLR very nice results! Looks like Dustin "DustoCharger" as I call him! has the great way to get a 600sci up to that 700HP plus range! Nothing like a little more boost!
Keep an eye on your valve train as that's probably going to be the system that will need careful scheduled maintenance.

Best Regards,
Ray @ Raylar

Hi Chris,
That's a very nice number for a modified "stock" motor. Congratulations,
Steve

Thanks guys,

I really appreciate your input.

Chris