8433jeff
Aftermarket connoisseur
If you want a green one, find one used I've been told. New ones are red.
Efco 152 long term test
- Thread starter Stihl Crazy
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If you want a green one, find one used I've been told. New ones are red.
yeah just to illustrate the epa effect.
Olympyk 251Super --- 53cc ---- 7.0hp
Olympyk 251B --------- 49cc ---- 6.0hp
EFCO 152 ------------- 51.7cc --- 3.4hp
EFCO 156 ------------- 56.5cc --- 4.1hp
DAM! thank you EPA. no wonder everyone wants to mod their muffler
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The horses were smaller back then. Usually the kw ratings are more consistent.
i have to respectfully disagree. the units of hp (and kW) have been in continuous use for over 100 years. the difference between kW and hp ratings is merely a matter of what units you are using. they are directly proportional to each other. to get kW from SAE net hp multiply kW by 1.34.
Further the difference between SAE hp (the standard definition of horsepower) and DIN hp (a version of horsepower that is measurement protocol in Germany) is a factor of 1.0139 according to this link:
How to Convert DIN HP to SAE | eHow.com
therefore to convert from DIN hp to SAE hp - divide DIN by 1.0139
inversely to convert from SAE hp to DIN hp - multiply SAE by 1.0139
maybe so but the rating is referenced to SAE. who can account for calibration. i can't believe anyone would actually fudge a hp rating. say it aint so.
Would you rather believe that an old 53cc Oly is stronger than a Dolmar 7900?
what can i say? i only report what i see. if you have any evidence to the contrary i will certainly look at it. here's hoping some of the true experts in AS will jump in and share their knowledge on this subject. i'm willing to be wrong; have been so often. but i'm also willing to be right.
saw troll - you got 2 cents to throw into the pot?
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just found this link someone resurrected on another thread. seems like the question just continues everforward.
http://www.arboristsite.com/chainsaw/6817-2.htm
http://www.arboristsite.com/chainsaw/6817-2.htm
I look at it this way (doesn't mean I'm right):
Once upon a time, car manufactures used to rate their engines differently. No air filter, fan, water pump, alternator or other belt drive accessories, often exhausting through headers without mufflers. Some motorcycle journalists used to talk disparagingly of 'Horsepower Developed at Brochure'.
What would you get if you took the air filter and flywheel fins off that 250 super, and bolted up the exhaust from a 50cc Morbidelli?
Once upon a time, car manufactures used to rate their engines differently. No air filter, fan, water pump, alternator or other belt drive accessories, often exhausting through headers without mufflers. Some motorcycle journalists used to talk disparagingly of 'Horsepower Developed at Brochure'.
What would you get if you took the air filter and flywheel fins off that 250 super, and bolted up the exhaust from a 50cc Morbidelli?
i agree there's more ways under the sun to "tweak" power ratings and i'm sure many have been guilty of it. i'm not one to trust blindly, always question authority. i just use the numbers as points of reference. doesn't mean they're right or wrong. somewhere in between. i'd still say the pre-epa hp is probly more than the post hp though maybe not as high. your point about the Dolmar 7900 makes a compelling argument. i wish my old saws outran those larger saws. only solution would be for someone to do independent testing; that ain't gonna happen for various reasons.
Great Smokies
ArboristSite Operative
Well, yah, the Efco part will be red. But if it fits and runs, I use it! :cowboy:
8433jeff
Aftermarket connoisseur
I've gotten parts for these saws from Deere in the past, and have looked up prices. Haven't checked out a fuel tank or handle. My local dealer has a couple JD badged bars, but not at a clearance price.
There has been a lot of Cub Cadet badged bars going cheap on ebay for a while. I bought a couple and see there is more.
8433jeff
Aftermarket connoisseur
Are they any good or are they butter bars? The Deere one the saw had was nothing special. They are obviously made by someone else, more than likely our friends at Oregon, to what ever spec is handed them. I will say it was a better bar than the cheaper Oregons, like the pro lites or matches.
Great Smokies
ArboristSite Operative
Cub bars I've seen were el-cheapo, 3 rivets on the sprocket.
Stihl Crazy
ArboristSite.com Sponsor
Got the 152 back together. Ran 3 more tanks.
Strelnikov
ArboristSite Operative
Back on track!
slipknot
Addicted to ArboristSite
the 18" = 3 rivets 20" = 4 rivets they are rebadged oregon microlites. I run baileys narrow kerf on mine and woorks great. very fast set up
slipknot
Addicted to ArboristSite
Just curious...are you gonna port that little critter? If you do yours I'll do one of mine....nah...mines gonna get it anyway....I got this extra jug and episan piston.
