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Robin Wood

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Everything posted by Robin Wood

  1. Robin Wood
    Precisely, i call it the pendulum effect. The weight will self sustain a good bit when power drops from moving the load, feels like the weight will assist in a lever like effect. My brother in law works in oil barge, their 40ft long engines have special weights on the crank web. He said we wasnt aware of that concept until we spoke about it, the other day he rang me and said everything make sense now and he said when they shut the engine off. It'll free spin couple rounds shaking the whole ship before coming to a full halt, he says he can feel the weight swinging and going back and forth abit before stopping completely. I hope im not boring you folks with too many details lol
  2. Robin Wood
    I was hoping someone would bring this up 088/880 has poly flywheel, so they're out of the equation. 3120 is metal flywheel along with 1200, i imagine the weight dont vary too much. Clutch definitely goes to 1200, big 4 piece clutch. I'll weigh em one of these days. Anyway you're right, the reciprocating assembly weight will generate most of the tq and will give the ability hold the rpm in the cut under load. A heavier reciprocating assembly will try to stay in motion better than a lighter mass assembly, although some throttle response is sacrificed on the heavy ones. It'll give great usability, in other words wide power band. Some of you tractor guys will know better, adding that flywheel weight and all to gain some tq
  3. Robin Wood
    Yes sir, more stroke with heavier crank will yield an exponential gain in torque Haha I suppose so, trend varies across the pond
  4. Robin Wood
    088 crank 742g 3120xp crank 839g 070/090 crank 945g 1200 crank 1,028g I'll need 166 dolmar crank weight someday to complete these data's for my research I believe the farm tractor folks will understand what im up to here
  5. Robin Wood
    Thx mate, you too Sorry i tend to be defensive at times lol Hope didnt offend anyone here, its all good I can relate, not a fan of seasoned stuff myself. And some wood that grows along the beach area could have high silica content, which increases its abrasiveness. Even 404 will barely survive a single pass, if you dont sharpen and let the chain cool down before the 2nd pass. You're asking for trouble, they get stretched and beat up Yeah those ozzie guys are dealing with different kinda mess, all the iron bark, yellow box and stuff. Pretty bad shape by the looks of it Hope to put it to work soon, will come in handy pulling big trees in tight spots. Where heavy equipments cant access I did in the past, softwood is fun. Hardwood not so much, double power head with 100 over cc is a must
  6. Robin Wood
    Now we're talking, someone who speaks my language lol Port timings on 1200 are very conservative, the last time i put a degree wheel on it. It had 100ex, 120tr, 75int nothing fancy in there. You're right its league competition will be 070/075 and all those torque monsters. It will eat said models alive without breaking a sweat It comes with 7 pin 404 on 1200, 1201 got updated with clutch and sprocket that will interchange with 070 I went through every single aspect to find where the hell the tq is coming from and i found something very interesting, nothing is really fancy on this saw. But how is it making so much tq? 1200 58mm bore x 44mm stroke 070 58mm bore x 40mm stroke 3120 60mm bore x 42mm stroke 880 60mm bore x 43mm stroke I'll share that interesting finding in abit
  7. Robin Wood
    You nailed it mate I've had this conversations in the past, long ones. In other forums, not sure i can mention names here. Anyway there were always 2 camps, one that prefers hp and the other that prefers tq. Both serve their purpose in the given environment In that discussion we all finally agreed in chainsaws it will come down rim/sprocket setup. That is our gearing, unfortunately its limited. You can up, not down. I measured crank ends on few models and realised i cant fab a 6 tooth rim sprocket for my 395. If i can do that i wont need a big saw, my 395 will do everything i need and more. When you gear down you lose rpm and gain tq, that balance is what we're looking for when cutting wood. We need enough tq to overcome the load aka the wood and as much rpm as we need. In soft wood its all about speed, because the load factor is minimal. In hardwood its the opposite
  8. Robin Wood
    And it can handle load better, low rakers in other words
  9. Robin Wood
    I run a tree service in my country Use all these saws, tinker with it, mod it, buy and sell. Always doing crazy things lol Here's a custom chainsaw powered winch im working on, guess the power head It'll be a prototype before i finalise the design One of those bolts let loose and hit some part on the pto side case, minor set back. Gonna call it a day and have some beers lol. Happy thanksgiving guys, yall have a good one
  10. Robin Wood
    Nah its a chainsaw mate
  11. Robin Wood
    Unfortunately im from malaysia That'll be fun for sure! Im afraid we can only do comparison videos for now lol In soft wood i believe 880/881 will have an edge, but long bars might slow em down to give 1200/1201 the edge. Will be interesting to find out Here's a thrashed 3120, it has 6203 case bearings. Same as 395/288, while its competitors are using 6204 and proprietary bearings. Crank seal is on oil pump assy, if oil pump fails and the reubber seals goes bad. Oil will flow into crankcase and cause a mess or even worse seize it. I despise this design
  12. Robin Wood
    Wasnt technically comparing, wanted to show where the tq is coming from Yeah im not a fan of big saws myself, my ported 395 is my favourite big saw. Pulls 404 like a freight train, dont mind swinging it all day long. 1200 has 6 point rubber mounts, feels alot comfier than 880. 3120 spring avs arent too bad, i like those Yes in our hardwoods, only high tq saws will serve a purpose. 084 is my all time 2nd favourite saw, no rev limit or non adjustable carb BS. Good ol school speed and power, gotta mod it some day It'll be interesting to see how the 881 fares in long run, im not a fan of strato tech. Hey its a choice, if you prefer new tech by all means go ahead
  13. Robin Wood
    Im porting a 880 soon, I'll do a comparison video against 1200. 881? I believe its a strato model, not a fan of heavy piston spinning high rpms
  14. Robin Wood
    Im not comparing those, they're not it in the same league. Pay attention to the numbers, look where is the tq coming from on the echo. Tq and hp will always meet at 5252 rpm, often times on small 2 stroke engines they will be developed in later rpms and lost in high up rpms. 1200 develops tq way low in the rpm which gives it the lugging power for our hardwood. Ms880 and 3120xp has 7.8nm max tq while 1200 has 9.5nm tq. However hp developed by 880 and 3120 are much higher due to the rpms they're spinning. 880 is 8.5hp range, 3120 should be close at 8.2hp and 1200 is at a mere 7hp. All saws are in stock form Here's a dyno from a heavily ported 3120, not a fan of those. I'd pick 880 before 3120, been inside all these 3 saws and 3120 hasnt impressed me a single bit
  15. Robin Wood
    Cs1200 42" full comp 404 cutting dense hardwood Running at the back is 084 30" full comp 404 because it wont pull 42"
  16. Robin Wood
    Cs1200 vs 395xp dyno Heres some bullshit and rub it on your face real good
  17. Robin Wood
    Care to elaborate why its bullshit?
  18. Robin Wood
    Here's my parts saw 3120 on the pto side Pop quiz Who can tell me why it doesn't have a chain brake?
  19. Robin Wood
    You'll have different opinion if you've ran one, 880 and 3120 are turds stock for stock compared to this beast
  20. Robin Wood
    I dont think a brake can stop a high torque motor like this, even our 3120 dont come with chain brake. Now thats a whole different story
  21. Robin Wood
    It does have the old school look and feel on it, but dont let that fool you. Av is fantastic and pulls way harder stock for stock against all the new epa controlled bs. Although a ported 880 will be a weapon, this one here will give a fight
  22. Robin Wood
    Echo cs1201 mate Biggest saw echo offers, only available in selected 3rd world countries. For heavy duty rainforest logging and milling
  23. Robin Wood
    Did someone say big saw? ?
  24. Robin Wood

    288xp

    Robin Wood replied to Robin Wood's topic in Chainsaws

    Its a whole different animal with dual port muffler and porting. They're still being made for our market in 3rd world countries where emissions regulations are not met. Good to have the ol reliable stuffs
  25. Robin Wood
    Probably duty free Im from malaysia btw

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