I think you could do that easily with one or two dyno GTGs. It'd probably take a while through shipping only. The back and forth shipping makes it hurt a lot worse.
Snellerized MS461 on the dyno
- Thread starter blsnelling
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Ron660
Addicted to ArboristSite
Brad, any guess on the HP of a ported 390?I've got a 390 that ain't skeered
Hmmm. I'll go 8.5 @ 10,500.
Ron660
Addicted to ArboristSite
Sounds good....probably close. Does the factory 390xp's have limiters on the carb?
Yes. I install an unlimited coil on them to make them easier to tune, and to keep an ear on the tune while working.
I got $10 for the upgrades.
$1490 to go.......
$1490 to go.......
HuskStihl
Chairin'em for the sound
I had already set u'r dyno fee at $75. I'd also need you to sign a release stating that if (when) my 394 melted u'r dyno, I wouldn't be held responsible!
chadihman
Addicted to ArboristSite
If your 394 melted on my dyno I'd call it a P.O.S.
Rx7man
Cattle Rubbing Post
Very nice! I'd love to do dyno work, but am too cheap to spring for it. I know the feel of my Husky 65 changed dramatically for the better throughout the RPM range with the noobie porting job I did on it.. Dyno graphs are indispensable tools for engine work.
Ron660
Addicted to ArboristSite
Why do you think the 390xp's are faster the
Chad, is a ported 660 the largest "cc" saw you've tested on your dyno? I'd bet a ported 394 or 395 has more torque, and HP, than a ported 660. I'm sure a ported 880 would be even more. 880 vs a 3120 might push your dyno to the max!
Faster than what?
chadihman
Addicted to ArboristSite
Yes a couple ported 660's were no problem for my dyno to make them beg for mercy.
chadihman
Addicted to ArboristSite
I'll have to go back and review the pump specs again. If it blows I'll build it stronger. Actually might be better to have one for big ported saws. I'm still running the same cutter less chain. It's 3/8. 050 maybe. 404 would be better for the big boys.
Ron660
Addicted to ArboristSite
I'm considering trying a 404 on my ported 660 with .063 gauge.
Ron660
Addicted to ArboristSite
Faster than similar sized Stihl's (ported 660 vs ported 390xp)? Do Huskies have a shorter piston stroke? If so, is this an advantage?
Yes, the 390 will be faster. It's a much more modern quad port design. The 390 is just an over grown 372/346 and runs accordingly.
Deererainman
Firewood Hack
I don't know about chainsaw dyno's, but used to have a tractor PTO dyno. It puts a heavy strain on the equipment, maybe more so than normal use because are driving/pushing the equipment to it's absolute limits.
chadihman
Addicted to ArboristSite
I run tractors on dyno's all the time at work. It does not strain a true working tractor more than what it was intended for. On Saturday I ran a 360 hp New Holland T8.360 on our dyno and the performance monitor in the tractor said it was at 100% engine load at rated test pull down rpm. Yesterday I had that same tractor hooked to a 12 row pivot planter and moved it to a location down the road 2 miles. The performance monitor said 118% engine load when pulling Hills at road speed.
