Stihl 064/066 56mm big bore 99cc build using oem and aftermarket parts
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- เผยแพร่เมื่อ 4 พ.ค. 2020
- showing most of the build of this saw using oem and aftermarket parts...I show port work and share timing and suish numbers on this build...at the end I show the saw running and do a re-cap of the build....
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Awesome build!, did you have to go with longer cylinder bolts using the 660 cylinder
👍👍
I looking forwarded to seeing it cut! whats the reason that you don't want to polish the transfers? thanks
too smooth of a surface can cause fuel to puddle you wabt it snooth but not polished...
@@JandSChainsaw Yup, this is advocated by both Jennings' & Blairs' books on 2-stroke performance (Blair calls it 'cleaning out the dingleberries' ROFL, true beavis&butthead throwback right there!) There's definitely reason to want it "fully flattened & perfect" but insofar as "should you finish it at 100grit, or 500+ grit smoothness?" isn't something I can find hard answers on, many share your thinking of "fuel puddles" (and it *does*) but at the same time a rough surface automatically creates eddying of the charge(slower movement of the near-wall portion of the charge), I've yet to find any actual "this is the right level of roughness" for intake/transfer tracts, my instinct is that it should be in the 100-180grit range if one were just using sandpaper to finish, which I actually do a lot IE finishing my ports by-hand, I like leaving the last ~5% for hand-files & sandpaper, really ensure everything's symmetrical & on-point (just finally finished my big bore, came in nearly perfect at 99//81//125 squishing under 24.5thou and over 1.25mm before-freeport!)
What cc is 56mm Kit?
99
Couldn't you fill in the elongated holes with an apoxy or aluminum filler just to ensure seal of cylinder and crankcase.
I like with all of your timing numbers and how clean you chanfer openings. Should pull hard
Un needed
@@christophercollins2330 thanks
VERY neat video!! You mention these 56mm piston-skirts NOT fitting the crankcase- you *sure* about that? I'd bought a pair of these 56mm kits (true cheapies, not Hyway/etc although my 54mm hyway jug is by far the nicest I've seen "off shelf") expecting & planning "That 56mm slug isn't gonna fit the case, but that's fine because I was already doing case porting to this unit", but then I received my 56mm kits....did you measure yours? The piston-skirts are 78 thou short, so you don't have to do the crankcase porting, I initially thought "well that is totally moronic, the intake duration is over 200deg on this thing" with the 56mm 1.160" pistons, but then realized that it's 1-or-the-other: crankcase porting, or simply JB-Welding the intake to whatever you choose, to match the shorter piston or go further, plus it's not like that prevents you from still porting/flowing the crankcase, and the pistons are lighter although they can't be machined as they seem to come like 5-30thou from free-porting out of the box! BUT, considering their comb.chambers are actually smaller than a 54mm's - by over 11% actually - the compression-ratio is already jacked-up on these jugs, if you wanted to put a pop-up in I'd bet that your compression is just around where you'd be aiming for w/ machining!
Very interested to hear where this went, video being 1.5yrs old now is a good yardstick to hear how this unit turned-out, will check your library hopefully you've put an update but if not I'd be eager to hear all you could share on how this worked-out!!
(PS the #'s on mine were initially awful like yours, I think I'm settling at exhaust to 148duration, intake came out at 158.5deg duration after JB'ing it and moving it 50% upwards lol, high compression, 10thou off the flywheel key and 8-pin sprocket, custom airbox custom muffler setup & heat-shield, gah I'll save it for the vid I'm gonna make on it ;D)
These were the very early 064 cases and most defiantly have to be opened up the later 066 and 660 cases dpnt
@@JandSChainsaw Ah OK I gotcha! I'm younger(30's) and newer to this platform (
So is this basically a 088 jug?
dont think so,bought this one aftermarket....
@@JandSChainsaw ok thanks6.do you know if there is a company that makes a over bore that that just bolts right on.
@@marksmopar609 j don't think so if it's the older cases they need opened up..if you have a later 066 or660 to my understanding they are a direct bolt on..
Hello, would you consider a similar build on my 064? Would you be comfortable sharing your contact info?
Shoot me an email it's under my contact info
@@JandSChainsaw pardon me, I looked all over, don't see email address, would you write it here or tell me where to look?
@@devonbonfy2506 jschainsaw2020@gmail