Snellerized MS461 on the dyno

[blsnelling]

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.

 

[Ron660]

I've got a 390 that ain't skeered

Brad, any guess on the HP of a ported 390?

 

[blsnelling]

Brad, any guess on the HP of a ported 390?

Hmmm. I'll go 8.5 @ 10,500.

 

[mdavlee]

I would like to send a saw or two myself. I just need some time to finish one up that I'm collecting parts for.

 

[Ron660]

Hmmm. I'll go 8.5 @ 10,500.

Sounds good....probably close. Does the factory 390xp's have limiters on the carb?

 

[blsnelling]

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.

 

[LowVolt]

I got $10 for the upgrades.

$1490 to go.......

 

[HuskStihl]

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!

 

[showrguy]

I got $10 for the upgrades.

$1490 to go.......

cheapass,
i'll give $100.00 for the upgrades..

$1390.00 to go.

 

[chadihman]

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!

If your 394 melted on my dyno I'd call it a P.O.S.

 

[Rx7man]

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]

Yes. I install an unlimited coil on them to make them easier to tune, and to keep an ear on the tune while working.

Why do you think the 390xp's are faster the

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!

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!

 

[blsnelling]

Why do you think the 390xp's are faster...

Faster than what?

 

[chadihman]

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!

Yes a couple ported 660's were no problem for my dyno to make them beg for mercy.

 

[chadihman]

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]

I'll have to go back a d 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.

I'm considering trying a 404 on my ported 660 with .063 gauge.

 

[Ron660]

Faster than what?

Faster than similar sized Stihl's (ported 660 vs ported 390xp)? Do Huskies have a shorter piston stroke? If so, is this an advantage?

 

[blsnelling]

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]

Well something made you feel the need to post that..??
What was it?
View attachment 400721

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]

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.

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.