Hiccups - Game for Engine Experts

[JimN]

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.

[Ryan]

Originally Posted by JimN

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.

[JimN]

Was that at idle only, or did you rev it to listen for pinging?

[Ryan]

Originally Posted by JimN

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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Any news?????

[Ryan]

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.

[Ryan]

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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Great news!!!!