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Huskybill

Huskybill

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May 21, 2018
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We had a pro engine builder here in a local shop build our 288. He polished the crankcase after removing the paint then ported it. Since I was cutting firewood at the time I was given it to break in. The fair was two weeks away. This saw was an animal.
Every logger in the open class ran this saw. I knew the saw and how she cut. Every cutter was in first place as the competition went on. I noticed the hotter the saw got the faster she cut. I was the last one to cut with it. And cleaned house with it. I didn’t have to lean into it, just let her cut. My point is don’t underestimate these 81’s/88’s.
There sleeping beasts too.
 
Walter Glover

Walter Glover

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Feb 28, 2017
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Rocky Mtn House
Went out and gave the old 480cd some luvin
Man they run nice for what they are. Need a carb adjuster grommet guide. It’s a bugger to adjust without that piece to guide the adjuster. Any tips on how to make one?
 
rocketnorton

rocketnorton

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Apr 2, 2013
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surrey bc can
What did you think of the quality of that kit? I bought the Meteor 288 kit and there is good and bad.

The good: nikisil plating is excellent, port timing was exactly like oem cylinder, casting looks nice, bevels are very good, piston/rings are good quality and sized to cylinder (B).

The bad: transfer ports are small - especially the lowers. Base was not perfectly flat, but would likely be fine with a gasket. Cylinder fins are quite thick, possibly reducing air flow. Intake port does not perfectly match the carb spacer.

i think its ok. was warned to watch carb block to cyl. ground elbow down a little, to be sure.
blew 170 after couple heat cycles. few tanks since. havent checked again. has gasket.
not a porter, didnt pay em much mind other than lookin for sharps.
jug looks oe as far as fins/casting.
 
CJ Brown

CJ Brown

"I learned this from a hockey card..."
Joined
Dec 4, 2016
Messages
1,642
Location
Belleville, Ontario, Canada
All this saw playing sure points to the dyno eh!
Need a way to test with before and after data
There have been guys playing with a chainsaw dyno in the past but that seems to have up and evaporated because I haven't heard of any more testing in a few years. I think a dyno would be incredible fun though - I have a pile of saws here I would love to test, and then play with some cylinders and do some more testing. That would be awesome in my opinion. I also think it would be a real feather in a saw porter's cap if he could provide before and after dyno sheets to customers. They don't have to be race saws, but it would show where the gains are and how much.
 
CJ Brown

CJ Brown

"I learned this from a hockey card..."
Joined
Dec 4, 2016
Messages
1,642
Location
Belleville, Ontario, Canada
beavis331

beavis331

Wiggle wiggle wiggle
Joined
Jun 7, 2009
Messages
1,337
Location
Minnesota
All this saw playing sure points to the dyno eh!
Need a way to test with before and after data

There have been guys playing with a chainsaw dyno in the past but that seems to have up and evaporated because I haven't heard of any more testing in a few years. I think a dyno would be incredible fun though - I have a pile of saws here I would love to test, and then play with some cylinders and do some more testing. That would be awesome in my opinion. I also think it would be a real feather in a saw porter's cap if he could provide before and after dyno sheets to customers. They don't have to be race saws, but it would show where the gains are and how much.

Todd over on the Poulan thread recently built a Dino using a hydraulic pump. Pretty slick rig.
 
Huskybill

Huskybill

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What feed back does a hydraulic dyno give you with a chainsaw? I never seen one but the dynos I built use torque transducers to give up feedback.
 
Jethro 2t sniffer

Jethro 2t sniffer

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new zealand
What feed back does a hydraulic dyno give you with a chainsaw? I never seen one but the dynos I built use torque transducers to give up feedback.

Todd's gives a psi reading so is not in hp but run a few saws get a psi for all as a baseline and it gives a good clear reading of improvements or how it compares to other saws.

He has a 395 cylinder on a poulan 3400 that is a good benchmark saw lol
 
Huskybill

Huskybill

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using a torque transducer with a wet adjustable disc brake for a load would give us output in inch pounds. The saw is tested at WOT. Could drive the torque transducer from the output shaft to omit clutch slippage.
 
Walter Glover

Walter Glover

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Feb 28, 2017
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Mine will be simple as possible. Disk brake from a mountain bike for load, torque arm to a weigh scale and a tachometer driven by a mag pickup sensing mounting bolt heads. Automotive tach with eight cylinders selected triggered by four bolts. Need to work on this more
 
Hoggwood

Hoggwood

Dumpster saw enthusiast
Joined
Apr 5, 2014
Messages
967
Location
Okanagan, BC
Picked up an earlier 77 on the thrift. Sat neglected for years.

Didn't need too much to get it running. New lines, diaphragms massaged a bit and a new sprocket. Great compression and clean piston. It cuts wood now.

Needs the bigger spike. I'd take a template if anyone has one.


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