Head Gasket In HP500EFI Casues Failure?
11-07-2003 | 08:59 PM
#29
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Joined: Jun 2002
Posts: 529
Likes: 1
Man major melt down. Are you running water pressure gauges or has it been checked? With that rig I bet you run it with the throttles pinned WOT quite a bit. 
If I had that I would be anxious to get back on the water to. Really I am that way no mater what! 
If I had that I would be anxious to get back on the water to. Really I am that way no mater what!
11-07-2003 | 09:43 PM
#30
Registered
Joined: Apr 2001
Posts: 105
Likes: 0
From: Raleigh, NC
The severe damage between 5 and 7 looks like pre-ignition damage. The engine firing order puts extra heat between those two cylinders. Was the base timing set to spec or slightly advanced? The knock sensor only compensates and retards a limited amount. Are you using stock ecm's or modified? What is your water pressure and do you have sea strainers with reserve water capacity (helps prevent hot spots and steam pockets caused by aerated water).
