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Old 04-21-2013, 02:37 PM
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Originally Posted by lil red
What's the cam specs? Those look like real short risers and water hitting the backside of a hot valve could cause it to fracture. Any pics of the other pistons?
I am with you now. took a min. I remember asking about the Cam during the build. They had a cam machined to a particular specification. No part number on build sheet. Will get the specs next week. Just so happens they have a new article an reversion on performaneboats.com

http://www.performanceboats.com/cont...on-review.html
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Old 04-22-2013, 01:52 PM
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Do you have flappers on your exhaust? People are commenting on reversion, that can very well be a problem but it seems with these Eagles when you come off plane the backwash will try to shove it's way up the exhaust. I even adjusted my driving to compensate because the vents above the swim deck would become an open faucet to fill the bilge. When they dyno'd the engine did they use wet or dry exhaust? I take it these pictures are of the dead old engine not the new problem one is that correct? Randy
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Old 04-24-2013, 12:14 PM
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That ;ip pnside the riser is called a turbulator. It catches drops of condensation as a hot engine cools.
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Old 05-15-2013, 08:06 AM
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Those manifolds are prone to reversion. Early HP500's used them and they had a raft of problems with them. Anything over about 230 deg.@ .050 and they reverted. Merc went to CMI exhaust shortly after.
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Old 05-17-2013, 09:33 AM
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Originally Posted by Randy Nielsen
Do you have flappers on your exhaust? People are commenting on reversion, that can very well be a problem but it seems with these Eagles when you come off plane the backwash will try to shove it's way up the exhaust. I even adjusted my driving to compensate because the vents above the swim deck would become an open faucet to fill the bilge. When they dyno'd the engine did they use wet or dry exhaust? I take it these pictures are of the dead old engine not the new problem one is that correct? Randy
You have to treat coming off plane like your driving a 19' jet boat, lift off the throttle, wait for the wake to be within a couple of feet of the transom then goose the throttle.
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Old 05-17-2013, 11:53 PM
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Yea every boat has it's quirks & that seems to be one of the eagles but dang they are fast so I can live with it. Is there any new info? or was reversion the problem? Randy
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Old 08-04-2013, 04:45 PM
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Flappers in and boats running great. Thanks
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Old 08-04-2013, 10:54 PM
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Cool, Now we need pictures Lol. Randy
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