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Old 12-05-2009 | 11:03 AM
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Originally Posted by CB-BLR
The smartcraft wants to see between 30-50 psi at wot. If water pressure drops below 28 psi, with the motor being over 4800 rpm, guardian will kick in.

If you are having water pressure issues on either a 600 or 700, contact Dustin directly... he has fixes for this.

Chris
What is the statis on your project?

Sorry about taking over your thread, but you have helped me with a lot of questions

Thank you!
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Old 12-05-2009 | 11:14 AM
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Originally Posted by gnorthga
Were the motors over heating?
No issues with overheating, because the pressure was within the design limits at let's say 20psi at 4,000rpm's, but as soon as the power increases over 4,200 the buzzer's went off because the engine went into guardian mode. I suppose there would have been overheating problems if the warning did not occur, but keep in mind that my engines are stock.

Last edited by aTX427; 02-20-2010 at 12:10 PM.
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Old 12-05-2009 | 01:57 PM
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Originally Posted by gnorthga
What is the statis on your project?

Sorry about taking over your thread, but you have helped me with a lot of questions

Thank you!
You are welcome,

The motor should be running on the dyno sometime late monday. Dustin had to custom fabricate some parts.

Chris
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Old 12-05-2009 | 02:01 PM
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Originally Posted by aTX427
The water pressure errors Dustin mentioned in his previous post have nothing whatsoever to do with his calibration. They are hard coded into the PCM from Mercury.
Dustin has the ability to change this calibration in the PCM... but it is probably not a good idea as opposed to fixing the water flow/pressure issues.

Chris
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Old 12-05-2009 | 02:46 PM
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Originally Posted by gnorthga
What kind of water pressure do you want to see

Do you agree that keeping the same props will keep some of the load of the NXT
Minimum 28psi @ 4800rpm, ideally like to see 32-35 @ 5200+.

Yes, same props will lessen load on the NXT and in the end, will be the quickest and fastest.
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Old 12-06-2009 | 11:28 AM
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Originally Posted by CB-BLR
Dustin has the ability to change this calibration in the PCM... but it is probably not a good idea as opposed to fixing the water flow/pressure issues.

Chris
Agreed

Last edited by aTX427; 02-20-2010 at 12:11 PM.
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Old 12-06-2009 | 11:43 AM
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Originally Posted by Whipple Charged
Minimum 28psi @ 4800rpm, ideally like to see 32-35 @ 5200+.

Yes, same props will lessen load on the NXT and in the end, will be the quickest and fastest.
Are you saying the boat will excelerate quicker and have more
MPH with stock 6 blade harrings?
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Old 12-06-2009 | 12:02 PM
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Do I have to do a pulley change and what is retail on the stage ? Kits
how much HP & torque will I have?
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Old 12-06-2009 | 12:31 PM
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Originally Posted by gnorthga
Do I have to do a pulley change and what is retail on the stage ? Kits
how much HP & torque will I have?
On the 700sci Stages I & II:

PCM re-program
Water re-route

No pulley change on Stage I - 780 hp
Pulley change on Stage II - 830 hp

You will have to contact Dustin directly for pricing.

Chris

Last edited by CB-BLR; 12-06-2009 at 04:26 PM.
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Old 12-06-2009 | 12:59 PM
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Originally Posted by aTX427
Agreed - I have my pressure issues worked out. It was a rigging issue.
What about other people with the same boat? There are a fair number of fountains (38's, 42's) with 700's......... Fountain didn't help at all or get their chit together?
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