nzjetboating Web Board.
nzjetboating.com Forums => Projects => Topic started by: Ross Goldsack - JBNZ Immediate Past President on August 23, 2020, 18:03:49 PM
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With the on going pandemic paranoia it has caused me to have a minor panic attack of my own, sending me on component spending spree just in case Cindy sends the rest of NZ back into lockdown. Better to be prepared ;)
I ordered a Jeffjet 3.0 to be cut by Mike from LVB and hopefully it will be cut and folded shortly.
Specs. (Subject to change ;D)
3000mm x 1290mm
10mm 5083 delta with 12mm hdpe.
2 piece nuke proof transom.
5mm outers and 3mm sides
Honda L15A7 with 2527 Chinacharger turbo
2 stage hybrid Kawasaki/DIY 157mm pump.
It will be nothing that you guys haven't seen already but I will post progress updates.
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So far I've made an adapter to bolt the teeny tiny turbo directly to the head.
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And I've started on the Laminova intercooler in the inlet manifold. Trying to keep it as smooth and as uncluttered as possible.
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Got a few more bits done, finished the intercooler end caps and my boy James machined the drive coupling to match Honda flexiplate 👍👍👍. Counterbored the Kawasaki coupling and used the longer bolts from the manual transmission model. I'm stoked he's showing an interest in shed stuff.
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nice, !!what do you do for a ring gear?
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I just weld the ring gear off the CVT torque converter straight to the flexiplate. These Honda flexiplates are slightly thicker than the Suzuki M series and don't seem to crack ........ yet l-l
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The tube was slightly to tight to slide laminova core into so I split and added 3mm in.
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I normally just bolt the ring gear to that flex plate? Pretty sure the holes are already there?
I'm not doubting your welding skills Lazy...
I wanna see how you weld that stainless elbow to cardboard intake plenum... l-l
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I'm not doubting your welding skills Lazy...
I wanna see how you weld that stainless elbow to cardboard intake plenum... l-l
Jeff - like you are with welding.... I am with sticky tape, nothing stands in my way.
Saturday afternoon is boys in the shed b>
One engine mount made, two to go
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Had a small opps when trimming excess weight off the little Honda (Jeff had warned me that they're a bit thin....what would he know 🤔)
Anyways...2 small cam chain viewing windows later I made some patches to weld back in, but I wacked the alloy plug right in to the engine. Tried tipping it upside-down and shaking but only oil and coolent came out C"" so pulled the sump and found the missing bit. Taped oil return from turbo while it was apart.
Made an intake today
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pretty much finished the inlet/intercooler, just a few touch-ups on the welding that the QC dept pointed out......🤦♂️
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Started on the hull.
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Got a bit more progress done b>
I had to shorten the driveshaft by 125mm, the first attempt caused a bit of stress as it was too tight and I couldn't get it pressed together before the temperatures equalized C"" C"".
My engineering advisor had put me crook by telling me that 0.07mm interference would work...... anybody with any idea would know 0.06mm is optimum. Second attempt worked well and ended up nice and straight.
The hi-lift jack was called into action to bend the 10mm delta for a nice smooth lead in to the intake.
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nice work !!
is there a bearing in the shaft through tube or just seals?
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is there a bearing in the shaft through tube or just seals?
There's 1 bearing and 4 seals, they are held in a little carrier that is gunked into the intake tube with mastic to allow a small amount of movement and absorb vibration.
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I haven't spent much time on the boat lately but will post a few photos of where we're at.
We got the unit aligned and finished mounting the engine.
My lad James is pretty proud of his handiwork... he's finished machining the steering helm b>
Tacked up the rest of the hull, just the screen to go. All straight, square and almost up to the standards set by Mohawk Marine 8)
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I haven't spent much time on the boat lately but will post a few photos of where we're at.
We got the unit aligned and finished mounting the engine.
My lad James is pretty proud of his handiwork... he's finished machining the steering helm b>
Tacked up the rest of the hull, just the screen to go. All straight, square and almost up to the standards set by Mohawk Marine 8)
Looks like James could become some stiff competition for Jeffjet if he keeps that standard up b>
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Thats some pretty looking lathe work! nice one- its coming together nicely. *-)
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October was the last update on this build......because nothing has been done until the last few days.
Hull welding is nearly complete, I made a little rolling steady for tig welding the outside corners. It worked OK and improved appearance from 2/10 to 2.5..... I'll grind welds and may even paint this boat for a change :o
Screen is tacked on, came out pretty good considering the kit supplier provided no instructions or templates, that's what you get when dealing with backyarders.
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Not too much wrong with your welds Lazy. Don't grind them off, it will end up cracking (unless you put a big weld prep on?). Paint will pretty them up more as well.
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That looks like a professional build jaw
Paint?? Does that mean you are going to look after this boat and not scratch it??
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Jimmy, I've run a dirty big mig bead on the inside so hopefully they don't crack.
In saying that my last boat has cracked where the dash meets the side and both rear corners too 😑 That was mostly from following Karl in that nasty river at Franz Josef.... at least I didn't smash right through my seat 🤣🤣🤣.
Any tips on preparing alloy for painting?
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Correct primers and prep with alloy is absolutely key to getting a lasting finish that won't just flake off.
Defo worth consulting a supplier for advice (Linkup paints etc) on a complete system.
Rubbing down all areas with scotchbrite until the finish is totally flat (as in no shine) is a good start. Use soapy water as you go which is a first stage of decreasing.
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Or check out a price to get it wrapped?
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Making a little progress now.
The screen is fully welded and sanded off, dash sorted out and steering helm welded in. Played around with steering and reverse set up, I've copied the Jeffjet style of bellcrank as I'm really tight on space at rear of engine..... I don't know who shortened the driveshaft so much???
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Great work. Keep up the pics and commentary.
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No progress for soooo long and then for some reason I've found a bit of spare time over the last few days...... ::)
Bucket seats were thrown out and gone back to a bench seat, still got a few finishing touches ✔
Fuel tank done with pump and filter mounted ✔
Forward/reverse leaver done ✔
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About time you did some work on it.
This turbine housing has been sitting here waiting for ages....
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About time you did some work on it.
This turbine housing has been sitting here waiting for ages....
It's probably still too hot to touch ::)
Thanks, it looks great and the quality welding will fit in nicely with my workmanship O))))
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Nothing very exciting to post but the boat is slowly coming together.
I've just remembered why painting boats isn't high on my list of favorite things to do.......
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All painted and pretty.... sort of. As I'm a bit rough on my boats I didn?t want to fill it with bog, so just did the bare minimum of filling and kept it thin
Nice from afar but far from nice.
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Looks a darn sight better than mine- very inspiring! What primer did you use (was it an etch?)?
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No etch required :o
I used PPG 3450 2K HP Epoxy primer and 2K Caprithane top coat.
The paint supplier told me that with these Epoxy primers no etch coat is required. I hope it was good advice! The data sheet backs it up and states that the only prep for alloy is to wipe down with 50:50 meths/water.
I might have looked a bit doubtful, as he dug out an email to the company that paints Shotover boats, time will tell.
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Paint prep spec
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Looks mint! Choice colour.
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Looks mint! Choice colour.
I see what you did there! ;)