Another BFN Rebuild |
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21141 |
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The v-hulls handle speed well... no dangerous tendencies that we've encountered yet. Probably due to the fact that the boat is up and walking on the keel- and the chines are way up out of the water. The nose still plants in the upper 50's, but not dangerously so- and a little less pronounced now without all the extra water weight up there.
Id still say that going fast (even if incrementally slower) in a flat bottom boat is more of a thrill, but this is pretty fun too. Kinda cool how nonchalantly it runs at 50, and can take off pretty strong from there. It sounds half way decent, too- not like any other CC Ive heard. Pretty sure Larry's brother took some video... and I'll try and remember to take some once the boats go back in the water. What Im really excited about is the way the boat foots... took my first boom set on the boat at WL and didnt have any spray to contend with on my backdeeps. As much speed as you want- and it doesnt even sound like its working hard. Should be a great rough water barefoot boat- which should hopefully lead to more sets this summer. |
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Air206 ![]() Grand Poobah ![]() ![]() Joined: September-28-2008 Location: Roanoke, VA Status: Offline Points: 3000 |
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It was pretty cool to hear it roar away from us at WL..... then the secondaries cut in! It was AWESOME!
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21141 |
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lewy2001 ![]() Grand Poobah ![]() ![]() Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
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Looks and sounds quite tame until 0.14 when you give it WOT.
![]() Sounds like the prop is having trouble gripping, the rpms jump instantly. ![]() |
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If you're going through hell, keep going
89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
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LilRichard ![]() Groupie ![]() Joined: July-30-2012 Location: Tampa Status: Offline Points: 78 |
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It looks like there is a ton of prop wash pouring out the back until the boat suddenly "catches up" (for lack of a better term) to the propeller speed. Then it cleans up instantly. Is that what is happening there?
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jbach ![]() Senior Member ![]() Joined: September-24-2012 Location: Kentucky Status: Offline Points: 140 |
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oh my, that thing sounds wicked.
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21141 |
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No... since the tranny rebuild, engine rpm is pretty much tied directly to prop spin and forward motion- no real slip or "catching up" to speak of. What youre seeing in the video is when the nose plants in the upper 50's. We believe it to be the point where the steep strut angle can no longer be overcome by the other factors trying to keep the nose up. The boat runs quite a bit faster if we can keep this from happening- running with a full tank of gas, a back seat full of people and across a choppy lake are amongst the conditions under which the GPS will read speeds shown in the picture I posted earlier. Run it with a few people in front and let the nose plant as shown in the video, and it'll "only" run a tick over 60. |
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kytom2 ![]() Gold Member ![]() ![]() Joined: July-25-2007 Location: Maysville Ky Status: Offline Points: 698 |
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Damned ole big block!
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quinner ![]() Grand Poobah ![]() ![]() Joined: October-12-2005 Location: Unknown Status: Offline Points: 5828 |
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Very cool, it sounds even more impressive live and in person!
So Timmy, whose going to get back there and do some speed runs? Think you could get 60 pulling a light guy like HW? |
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21141 |
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Scott Monahan was ready to do a full speed doubles run with me at WL... not sure if those guys are coming to GL or not, but I'd probably be up for trying it- at least once.
![]() Heck, with a good load off the Fly High, the nose runs higher than normal- so maybe it'll run 70! ![]() |
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Hollywood ![]() Moderator Group ![]() ![]() Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13512 |
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70 on the FlyHigh = 50 on the boom ?
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quinner ![]() Grand Poobah ![]() ![]() Joined: October-12-2005 Location: Unknown Status: Offline Points: 5828 |
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The faster you go, the easier it is, lol.
Does not look like you are porpoising at all, not sure if the high pull would change that?? Me and Brian Harlen did some high speed runs behind Reids orange Mustang, we (I) needed to move the ropes to the lift ring because the porpoising was so bad the rope on the pylon was pulling/slacking to the point of causing butt checks. With just 1 guy and the right setup you probably won't lose that much speed, think 60 may be attainable?? |
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21141 |
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This boat doesnt porpoise... it gets up and rides on the keel instead.
I was serious- the boat might go faster with a footer in tow if it helps keep the nose up. I dont think it would slow it down. |
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Hollywood ![]() Moderator Group ![]() ![]() Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13512 |
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Cottonelle, last time I checked 70 was faster than 60.
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LilRichard ![]() Groupie ![]() Joined: July-30-2012 Location: Tampa Status: Offline Points: 78 |
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Makes sense, less wetted hull area. I was wondering what the dramatic change was, and you answered it. Wicked!
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Got Tiques ![]() Senior Member ![]() ![]() Joined: February-27-2009 Location: Scotia, NY Status: Offline Points: 427 |
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Tim,
Beautiful water for a "short" barefoot run and WOW! I've never seen that whole side of the lake go by so fast. I also was thinking that a footer on the fly-high would help lift the bow q little and increase the speed, too! A footer or two will not slow that machine!! I've footed in the high 40's, but at 60+, there ain't much of your heels left in the water. Anyway, testing always helps, and I'd start a $100 donation to the Tyler Lake Ski Club if you could get Hollywood and Gregg on a full throttle run!! UT |
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tbeard ![]() Senior Member ![]() ![]() Joined: April-26-2012 Location: Fort Worth TX Status: Offline Points: 379 |
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Very nice Tim. Your boat sounds and runs awesome, Sounds like my old 1970 LS6 Chevelle engine. Thanks for all the support on my motor redo.
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Thanks.......Tom
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21141 |
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Resurrecting this thread with some of the more recent updates on our '79.
We ran the boat in the '15 Buckethead barefoot race and it ran well, but developed an engine tick... so last winter I rebuilt a spare 454 block to transplant. Found some scuffed pistons and questionable bearings when the bottom end finally came apart- it was due. Huge thanks to Joe for helping with the shortblock assembly last summer. Upgraded oiling, cooling, and oil cooling will be some of the improvements when it is finally back together. Still some plumbing and wiring left to do, but the engine is back in the boat and aligned now. Trans was swapped out for a newer 10-18 that hopefully won't pop out of gear on hard launches. ![]() I already documented last winter's hull mod project in this thread: notched keel. Haven't splashed it yet so the jury is still out on the exact effects. In addition, I rewired the boat front to back... including hooking up the heater (new hidden switch), installing the 12v aux ports in the pockets, under gunnel lighting, etc. The smoke test went well a few months ago. New amber LED's in the gauges, and I built a second 80mph GPS Airguide. ![]() ![]() ![]() ![]() ![]() ![]() This winter and spring, I made some changes to the seating... shout out to Andy at Leftfield Engineering for the custom fab work. I lowered the driver's seat 2" so I will actually look through the windshield now. I also had a bracket made up to gullwing the observer seat and gain easier access to the cavernous under-bow storage space (no holes drilled in dash). Before: ![]() After: ![]() ![]() ![]() Next up are the aforementioned finishing touches on the engine and to get the boat back in the water. Then a pylon swap and some trailer work. Zach helped me get a period-correct tandem (#4DV-T) from OK that is currently in resto-mode. ![]() |
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Wisky Badger ![]() Senior Member ![]() Joined: July-02-2015 Location: Wisconsin Status: Offline Points: 218 |
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I love the hinge on the observer seat. Did you source it from a later model or fabricate it yourself?
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Wisky Badger ![]() Senior Member ![]() Joined: July-02-2015 Location: Wisconsin Status: Offline Points: 218 |
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Sorry, guess I didn't read the post close enough to see you had it fabricated. Do you have any pictures of how it mounts? Can Leftfield Engineering build some more of theses?
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21141 |
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I'll shoot you a PM.
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81nautique ![]() Grand Poobah ![]() ![]() Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5777 |
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Subtle yet major changes, nice work
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hal2814 ![]() Groupie ![]() Joined: June-20-2016 Location: Bedford, TX Status: Offline Points: 76 |
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This. I would LOVE to have a bracket like that. If there's anything I hate about my 83 Ski it's that stupid observer seat that's always sliding out of its floor hinges and that I have to tilt forward to put gear in. |
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jbear ![]() Grand Poobah ![]() ![]() Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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"still crazy after all these years" I propose a number of high speed multiple runs at lake x..... john edit: can I drive? |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Nice work Tim
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Mark Mel ![]() Gold Member ![]() ![]() Joined: September-16-2005 Location: United States Status: Offline Points: 583 |
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Speed runs at Lake Zohar mini that we need to start planning.
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inglesideshawn ![]() Senior Member ![]() Joined: April-03-2009 Location: ingleside, il Status: Offline Points: 203 |
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What a great build...sounds awesome on that video clip
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1989 nautique
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NCH20SKIER ![]() Grand Poobah ![]() ![]() Joined: December-16-2004 Location: United States Status: Offline Points: 2207 |
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Some more fine work by TRB and Gang. Cant wait to get into / behind this beast
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'05 206 Limited
'88 BFN |
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Tim,
Nice work however, it seems you are veering off into the bling with the under gunnels! ![]() |
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21141 |
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No bling here, just functional upgrades. Trying to keep the outward appearance stock, look more closely and it's anything but... This boat gets used as intended, and used hard. We do enough skiing at dusk (and the occasional midnight cruise) to justify the lighting. No more unloading in the dark. Got a pair of lights to add to the Skier also.
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