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  #31  
Old 08-19-2008, 09:44 PM
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Without being able to actually hear it, I would have to say that it's possible for the timing to be off enough to backfire and not be a hard "typical backfire" sound. It's hard to describe this kind of sound but I haven't heard a lot of motors produce the sound you mentioned. Still timing is something that should be checked if it hasn't been, yet.
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  #32  
Old 08-20-2008, 10:08 AM
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Without being able to actually hear it, I would have to say that it's possible for the timing to be off enough to backfire and not be a hard "typical backfire" sound. It's hard to describe this kind of sound but I haven't heard a lot of motors produce the sound you mentioned. Still timing is something that should be checked if it hasn't been, yet.
I only checked timing by slightly rotating the distributor cap while the boat was on the trailer on the boat ramp in gear and out of gear. I got it positioned for the best running as I could.
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  #33  
Old 08-20-2008, 10:25 AM
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Was that at idle only, or did you rev it to listen for pinging?
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  #34  
Old 08-20-2008, 11:13 AM
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Was that at idle only, or did you rev it to listen for pinging?
I positioned for optimal between idle and 1200 rpm or so. My wife hated that part while she sat in the Armada feeling the boat pushing her up the ramp a tad.
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  #35  
Old 08-23-2008, 07:54 PM
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Any news?????
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  #36  
Old 08-25-2008, 09:45 AM
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WE"RE BACK IN BUSINESS!!!!

A meger $194 later this puppy runs fantastic. 1.5 shop hours included a timing adjustment, and replacing a tempermental/failing kill switch. I kick myself for not trying to replace that last one on my own, but now I know the timing was done right. The timing was off just enough to miss a cylinder once it was put in gear. I trusted some reco's from some Mustang forums about adding GT40p heads to a 351 and must have retarded the timing too far. From best I can tell the distributor is in the position it was before I swapped heads.

The mechanic was so sure it was fixed he didn't lake test it. To be sure all was well, we took it up to O'Shaughnessy for a couple of hours on Saturday. We're going out tonight to take the kids tubing on Buckeye.

The boat is certainly quicker out of the hole and a has a higher top end up to 4400 rpms with these new heads. I'll take the GPS to check real top speed.

Thanks for all of the insight and ideas shared.
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Last edited by Ryan; 08-25-2008 at 09:54 AM.
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  #37  
Old 08-25-2008, 09:50 AM
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Skinny ramps. But, I'll take them any day since they have good docks and most refreshing there are no launch fees! That $10 a pop I was used to paying in CA feels much better spending toward gas $.
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  #38  
Old 08-25-2008, 09:52 AM
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Great news!!!!
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