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Old 18-11-2007, 12:42 AM   #1
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2.5 Rev limiter

Does anyone know? If there is a safe way to raise the rev limits on a standard 2.5 - 200hp - 2003 carb engine. According to the manual, the rev limiter is incorporated in the Control Module, as below. Would be interested to hear, if anyone knows.

Cheers

Peter


The control module provides rev-limit (carb models), bias control, shift stabilizer, idle stabilizer,
injector timing signal (EFI models), and low oil warning.
On carburetor models, the rev-limiter affects the cylinders in the following sequence
2-3-4-5-6-1. As the engine rpm exceeds the maximum specification (5900 ± 100), the
control module will retard the timing on cylinder #2. The controller will retard the timing
a maximum of 30 degrees and then, if necessary, stop spark on the cylinder. If the engine
rpm is still above the maximum specification, the controller will begin to retard timing on
the next cylinder, then stop spark, continuing in sequence until the engine rpm drops below
the maximum specification.
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Old 18-11-2007, 09:34 AM   #2
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remove the oil injection and remove the control module box set the timing to 25 degrees and only run on super. and tighten up the heads to 34-35cc. there should be a difference
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Speed costs weight so what do we cut off first
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Old 18-11-2007, 12:29 PM   #3
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Quote:
Originally Posted by sinkunit0 View Post
remove the oil injection and remove the control module box set the timing to 25 degrees and only run on super. and tighten up the heads to 34-35cc. there should be a difference

Peter has CDM type ignition that has a rev limit built in, not a seperate module. I think he wants to know how to remove the limit.
Rapair do a modified unit without a rev limit function. www.rapair.com
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Old 21-11-2007, 08:46 PM   #4
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:)

i know of a modded box Pete'...

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Old 22-11-2007, 05:57 PM   #5
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what year is the engine
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Old 22-11-2007, 06:01 PM   #6
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a standard 2.5 - 200hp - 2003 carb engine.

I have already taken the oil injection off.
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Old 24-11-2007, 10:19 AM   #7
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Why do you want to up the revs? if its propped correct and your gettin 5k revs out of it??
any more revs and you will start to loose horse power.
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Old 25-11-2007, 01:41 AM   #8
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Hi Tris, I'm in the search for extra speed, when not skiing or pleasure.
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Old 25-11-2007, 05:56 PM   #9
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Quote:
Originally Posted by Peterjfinch View Post
Hi Tris, I'm in the search for extra speed, when not skiing or pleasure.
More revs would sacrifice power so I would think it in the prop pitch.
what speed are you getting and what are you after?
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