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  1. #16
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    Hi!

    Thanks for help.

    I have done some research, and a few guys up here in Norway and Sweden have hit the wall around 80-82 mph with their 350 sci's. The blow out speed seems to be a little lower than a Torquemaster case. One of them have added a nosecone this winter, and are now crossing his fingers for better speed. I think it will be all up to the configuration.

    I mounted a Bobs Nosecone on my PM 300 Fleetmaster case back in 2000, but it did not run faster. Not slower either. It ran 75 -76 mph. But better slip and stabilty. I swapped to a Torquemaster and blocked 3 waterinlets on each side. And the boat ran 77 mph at 2-2,5 inch below. Since the gearcase of 350 sci is larger (5,44 inch diameter vs 4,88 inch diameter), I presume I need to run it a little higher to offset drag.

    Its gonna be a exiting journey indeed. Its all sure that the engine is very strong, its the gearcase which is the issue.

    Cheers, Toffen
    Last edited by Toffen; 02-05-2011 at 04:24 PM.

  2. #17
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    Click image for larger version. 

Name:	Rigg 21.02.11 Hekk.jpg 
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ID:	228156Click image for larger version. 

Name:	Rigg 21.02.11 instrumenter.jpg 
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ID:	228157Hi,

    The rigging has started at last. We have started on the Livorsi Vantage instruments, new steering and transom config. Received two mobile photos. Unfortunately they are not that good, and the boat always looks dirty at winter time. However, it will be nice in the end. More photos tomorrow when the equipement is aligned properly, etc etc.

    Check this video from last summer. Ol Phantom 25 with twin 2.5 EFI SS engines (with a dead GPS though..) and a Motion 25 with twin 300 xs's. Great great fun. http://www.youtube.com/watch?v=K6Dks...layer_embedded

    Cheeers, Toffen
    Last edited by Toffen; 02-21-2011 at 05:40 PM.

  3. #18
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    As you know Toffen,I have a performance tuned 350sci on an AirshipRibs with jack plate and Bobs low water intake.
    I have just tested it for one day.
    Under that short test it ran better with the large diameter Bravo1 than the Rev 4 ,but I have to lab it more to get the right rpm and some more bow lift.
    The Bravo1 prop had much better " Grip " If that's the right word.
    Bravo1 is more ideal for me because I'm looking for good acceleration without loosing to much top end speed.
    My goal is 80mph and getting there fast.
    I feel a prop that mix the best from Bravo1 and Rev4 is the perfect one.
    Let's see if the prop specialist can do some magic with one of them.
    I keep you posted.
    I hope for an early warm spring this year. This winter is to long and with to much snow
    Last edited by Patos; 02-25-2011 at 05:55 PM.

  4. #19
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    So Toffen, will this be the first time you will have full power steering to use? I always wondered if you could adapt the Verado helm and power steering pump to an IMCO ram for a unique steering set up.

  5. #20
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    Hi!

    Thanks Guys.

    I have 3 sets of props to test: A labbed Mirage Plus 25 pitch, A bravo style 4b Hydromotive 25 pitch and a stock A45 Tempest 25 (very fast ol style with thin blades. Look forward to hear more from your results Patos! The winter been here for 4 months soon. Jeezz. Patos, can you remember how high you ran your propshaft before loosing water pressure? Did you block some of the water inlets on the side before you decided to go for the Bobs nose cone? Also be aware of that you can cut down the tube a bit to reduce transomlift from the Bravo. Merc sell a Bass edition with this configuration. BBlades etc also cut down the tube of the REV4 to add speed. Normally 1 mph. Not much, but none the less 1 mph!

    I had to replace all my steering to get the warranty. So its a new helm and electro hydraulic pump. The rigging has been straightforward. Plug and play so to speak. Not as last time when we had to rig all steering, fuel and instruments from scratch... I did have a PM 300 before doing the 2.5 EFI's. Costed me a fortune. But the 2.5 EFI's was great fun. Will never forget their sound and power.

    I will update photos next week when the rigging is complete. Engine is coming mid March.

    Cheeers, Toffen
    Last edited by Toffen; 02-27-2011 at 10:03 AM.

  6. #21
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    Toffen
    I know you have worked hard on this hull Why is it you removed the 2.5 motors?

  7. #22
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    Hi,

    To be honest. Too expensive as the fuel cost up here is 9,33 USD per gallon + oil USD 120 per gallon ... + you pay USD 180 per hour if you need a tech. And I am not a mechanic. Great fun with the 2.5 EFI's, but they need care. The best is to have the boat indoor when you not using it. I did not.

    Cheeers, Toffen

  8. #23
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    Hi!

    Just been informed that the engine delivery is delayed with 2 months.. due to shortage of a critical part. The production will start primo May. Thank God, as the boating season here in Norway normally begins primo June. But a little frustrated though

    I have also been informed that the 350 SCi will be equipped with the new 5.44 inch (dia.) Verado gearcase. It will use the 1.75:1 gear ratio with a 1.25 inch prop. shaft. However, I have asked if it can be delivered with the upgraded Poseidon 4,88 gearcase. The 4,88 diameter gearcase will be best for my hull, so I hope I can have that option...

    The boat is now almost completely rigged, only waiting for the engine. I will get hold of some pictures. The local workshop done a very nice job. Same guys that rigged my twin setup.

    Gas is now USD 9,75 per gallon. So I did the move in right time.

    Cheeers! Toffen
    Last edited by Toffen; 03-12-2011 at 08:10 PM.

  9. #24
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    Hi!

    The summer is soon here. The engine is two months delayed due to a vital part. I beleive its lower unit related. The dashboard, steering, trottles, electric set up, etc are all set up. And I have start polishing I will get some pictures posted next week.

    I will receive my new 350 sci this month, and I wonder if the 350 sci ECM has a built limiter for max wot rpm during break in. I know the 300 XS does have one, and you need to break in the engine a certain amounts of hours to get max rpm (with correct prop ofcourse).

    The 350 sci shall not be trottled to max rpm during its 4 hrs break in. Max 5,400 rpms. So the question is if its loosen up within this time or shortly after.

    What do you think?

    Cheeers and thanks, Toffen

  10. #25
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    I think the computers log the WOT time and let the reigns out a little bit at a time based on accumulated high RPM data. My new 200xs felt like it continued to get stronger after more high rpm time. many hours past initial break in time.

  11. #26
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    Hi,

    Thanks. I think the same apply here. According to the break in procedure no positive trim is to be used the first hour. And change rpms every 2 minute. From 2nd hour every 10 mins.

    Cheeers, Toffen

  12. #27
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    There are no limiter in any way on the 350. You and I don't need to brake in the engine as they need in many other countries.Usually we take small trips and don't go wot for more than 30 sec because of all the islands, rocks speed limits and other boats are in our way. After a few days we can take them out at open sea and maybe take a trip from Norway to Denmark. That's one hour :-)
    When I got my first 350 they told me to not " Cuddle " it ,but try not to go wot for longer periods the first days.

  13. #28
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    I would put it up against a tall prop at first, so that when it is time to WORK the engine at WOT for short bursts it cant spin up to high and will be up against a good load. After it has seen some hours at wot under heavy load you can pitch down and let it turn some time at higher rpms.

  14. #29
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    Hi!

    Thanks guys

    I have decided to use a Quad IV X O/B SST 25 pitch prop I have for the first hours. I have been reccommended not to idle, take it up and run it 4,000 - 5,400 rpms. The first hour changing rpms every 2nd minute and using zero trim. The remaining hours drive the boat in the same rpm range changing rpms every 10 mins - avoid idle but run it for what its worth After the break in I will swop to a A45 Tempest 25 pitch 3bl prop. When I had a single PM 300 this was the fasters prop of all. Curious how it will work out now.

    Patos; have you tested your rig this year yet?

    I am still waiting for the engine. The production should start up again yesterday, so I cross my fingers for delivery soon. I ordered it primo December, so its about time.

    Cheeers, Toffen
    Last edited by Toffen; 05-03-2011 at 04:34 PM.

  15. #30
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    Hi,

    I hope you all are well.

    Finally received the good news. The engine will be delivered next week. The delay has been due to the tsunami in Japan and lack of parts. But now everything is up and running here. Final rigging will take place next week and sea trial next week end. Pictures will folllow soon.

    Cheeers, Toffen

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