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#1
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Sort of a two-parter.
I realize this isn't a particularly strong engine, but feel like it still doesn't perform as well as it should. A) Does anyone know what the factory prop was for this engine (1990)? (B) Does anyone have any suggestions for getting a bit more HP out of it for a reasonable price? Have searched for electronic ignitions, but the few I've found out there are stupid expensive. Thanks, Mark |
#2
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Mark wrote:
Sort of a two-parter. I realize this isn't a particularly strong engine, but feel like it still doesn't perform as well as it should. A) Does anyone know what the factory prop was for this engine (1990)? Depends on the boat. WOT rpm range is the important number when buying/sizing a prop. For most fiberglass boats, should be 15" or 17" for lighter hulls. (B) Does anyone have any suggestions for getting a bit more HP out of it for a reasonable price? This engine is only 95 hp in a car, w/ a Holley/Autolite 2bbl carb, & OMC says 120 hp in your boat, but can be 205-210-215 hp in turbocharged form - google "Mustang SVO" for more info... Have searched for electronic ignitions, but the few I've found out there are stupid expensive. Check "Retro Rockets Pertronix" in a web search. It won't give you much if any perfomance boost, but your state of tune will be more consistant. Rob Thanks, Mark |
#3
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#5
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![]() "Mark" wrote in message .net... In article , says... Mark wrote: Sort of a two-parter. I realize this isn't a particularly strong engine, but feel like it still doesn't perform as well as it should. A) Does anyone know what the factory prop was for this engine (1990)? Depends on the boat. WOT rpm range is the important number when buying/sizing a prop. For most fiberglass boats, should be 15" or 17" for lighter hulls. It's a 17 1/2' Sunbird (fiberglass). No longer made. Haven't had it out this year, and can't recall what RPM it was hitting. The problem is that with a decent payload (~600 lbs), it's very difficult, if even possible to get on plane. I often have to hunt for another boat that's throwing a good wake and "surf" its wake to get enough speed to get up on plane. Actually a skill I got pretty good at, but a pain even so. (B) Does anyone have any suggestions for getting a bit more HP out of it for a reasonable price? This engine is only 95 hp in a car, w/ a Holley/Autolite 2bbl carb, & OMC says 120 hp in your boat, but can be 205-210-215 hp in turbocharged form - google "Mustang SVO" for more info... That's the sort of stuff I had already found. Can't justify spending that sort of money on a pleasure craft. I'd just as soon sell it and buy a bigger one if that's what it's coming to. Have searched for electronic ignitions, but the few I've found out there are stupid expensive. Check "Retro Rockets Pertronix" in a web search. It won't give you much if any perfomance boost, but your state of tune will be more consistant. Thanks. I'll check it out. Mark A friend of mine had the same problem with an identical Sunbird. His solution was to place 200 pounds of weight in the cabin at the front of the V berth. Jim |
#6
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I had a 18' Sunbird cuddy with that engine for a couple of months
(bought it in August 2004 and hurricane fed floods washed it away and over several dams in Sept 2004). During that short time, I had to purchase a prop. It was a 15 1/2 pitch 3 blade. As I remember, that engine & drive combination had a significantly different (higher) specification for WOT RPMs than a merc Alpha 1. Too many people (dealers) prop those boats using standard Alpha 1 WOT RPM specs and put to big of a prop on. Mine planed out nice and rode nice with that prop - not a lot of top end but a pleasant ride. Dave Hall On Mon, 22 May 2006 20:48:26 -0400, Mark wrote: In article , says... Mark wrote: Sort of a two-parter. I realize this isn't a particularly strong engine, but feel like it still doesn't perform as well as it should. A) Does anyone know what the factory prop was for this engine (1990)? Depends on the boat. WOT rpm range is the important number when buying/sizing a prop. For most fiberglass boats, should be 15" or 17" for lighter hulls. It's a 17 1/2' Sunbird (fiberglass). No longer made. Haven't had it out this year, and can't recall what RPM it was hitting. The problem is that with a decent payload (~600 lbs), it's very difficult, if even possible to get on plane. I often have to hunt for another boat that's throwing a good wake and "surf" its wake to get enough speed to get up on plane. Actually a skill I got pretty good at, but a pain even so. (B) Does anyone have any suggestions for getting a bit more HP out of it for a reasonable price? This engine is only 95 hp in a car, w/ a Holley/Autolite 2bbl carb, & OMC says 120 hp in your boat, but can be 205-210-215 hp in turbocharged form - google "Mustang SVO" for more info... That's the sort of stuff I had already found. Can't justify spending that sort of money on a pleasure craft. I'd just as soon sell it and buy a bigger one if that's what it's coming to. Have searched for electronic ignitions, but the few I've found out there are stupid expensive. Check "Retro Rockets Pertronix" in a web search. It won't give you much if any perfomance boost, but your state of tune will be more consistant. Thanks. I'll check it out. Mark |
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