top speed sonic 45 triple 575?
04-21-2014, 07:12 PM
#32
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Side note for the OP- The cabin is the exact same in the 42/45 sonic. The added 3 ft is in the engine bay for the 3 engine. You may want to consider twins for the insurance, resale, fuel, hassle.
04-21-2014, 07:14 PM
#33
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They also made a few Sonic 382 trip engine boats. The 382 shares the cabin with the 358. In twin form the 382 has great day time room over the 358. Trips in 38s, who ever though that was a good idea?
04-21-2014, 07:17 PM
#34
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That 388, she's a dancer. The trip engine one that was local hear would chine walk like crazy in the low 90's but power through it. Never rode on that one, but I have been on a quite a few of them, even a few converted to Arnesons. They don't have a locked in feeling, you can feel the water texture in your feet. They tow like two jet skis on the trailers. The have great fit and finish, but not a confidence inspiring ride IMO.
04-21-2014, 07:18 PM
#35
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I thought he was questioning the Sonic
Just proof positive I'm still a newbie in the sport LOL!!!
Thanks for your insight on these power plants.
See ya,
Kelly
04-21-2014, 08:00 PM
#36
Charter Member
true, but we got side tracked talking about a 388 hustler with trips, crazy.
They also made a few Sonic 382 trip engine boats. The 382 shares the cabin with the 358. In twin form the 382 has great day time room over the 358. Trips in 38s, who ever though that was a good idea?
They also made a few Sonic 382 trip engine boats. The 382 shares the cabin with the 358. In twin form the 382 has great day time room over the 358. Trips in 38s, who ever though that was a good idea?
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that 45 up north is a nice boat at an incredible price, surprised it has not sold yet.
04-21-2014, 09:41 PM
#38
575sci 1st gen had great blowers, with non MLS head gaskets....the gaskets should be changed. Blowers were wieand with oil baths front and rear.
Last gen of 575sci had a Holley/B&M blower with front oil bath and rear sealed bearings that would walk out and destroy rotors. However DMPE has a fix for the bearing problem, better bearing, heavy retainer.
The 575sci thermostat housing, intake are a bad combo for salt and hard to convert to closed cooling. However someone on here just converted one. Even with flushing the intakes and thermo housings (cast) break down quickly and are expensive/hard to find. The thermo housing alone is 900bucks without the front cover. The intake is disco and carries a retail price over 2gs. There are some options for re-engineering them, just wanted you to be aware.
In stock form 90 octane should not be a problem. The ECM does a great job of controlling timing under poor conditions, assuming your knock sensor is working. Keeping a 575sci stock is no fun however. A pulley, full roller cams, thermostat, and reflash gets you 700 hp.....why not? I run 93 or 91 in mine, 5800 rpms with boost getting into the 8-9 lb range. No issues with timing backing off on that fuel. Chillers help for additional detonation issues, however 120 degree stats keep these intakes really cool, even under that 256 heat pump.
575sci stock is a flat tappet engine with a very conservative, delicate cam. Wipe a lobe and there are not many engine builders that will want the stock cam going back in there, as there shouldn't.
Overall, prob not the best "run it and forget it" engine on the market. I didn't even talk about the IAC gumming issue
But easier and less expensive to add more power than a 500 or 525efi. The 500 and 575sci engines all had the "good" headers. The 525,600,700 had the CMIs with the early leak issues.
Last gen of 575sci had a Holley/B&M blower with front oil bath and rear sealed bearings that would walk out and destroy rotors. However DMPE has a fix for the bearing problem, better bearing, heavy retainer.
The 575sci thermostat housing, intake are a bad combo for salt and hard to convert to closed cooling. However someone on here just converted one. Even with flushing the intakes and thermo housings (cast) break down quickly and are expensive/hard to find. The thermo housing alone is 900bucks without the front cover. The intake is disco and carries a retail price over 2gs. There are some options for re-engineering them, just wanted you to be aware.
In stock form 90 octane should not be a problem. The ECM does a great job of controlling timing under poor conditions, assuming your knock sensor is working. Keeping a 575sci stock is no fun however. A pulley, full roller cams, thermostat, and reflash gets you 700 hp.....why not? I run 93 or 91 in mine, 5800 rpms with boost getting into the 8-9 lb range. No issues with timing backing off on that fuel. Chillers help for additional detonation issues, however 120 degree stats keep these intakes really cool, even under that 256 heat pump.
575sci stock is a flat tappet engine with a very conservative, delicate cam. Wipe a lobe and there are not many engine builders that will want the stock cam going back in there, as there shouldn't.
Overall, prob not the best "run it and forget it" engine on the market. I didn't even talk about the IAC gumming issue
But easier and less expensive to add more power than a 500 or 525efi. The 500 and 575sci engines all had the "good" headers. The 525,600,700 had the CMIs with the early leak issues.
04-22-2014, 07:14 AM
#40
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Mine is an '03 with the Holley blowers. They run awesome and like Ron said, very easily pumped up to 700's. I would consider these a plus over the 500 boats just for the ease of adding power. If you are not concerned with speed or upgrading the motors, stick to 500's.
