661 Oil Test 32:1 vs 40:1 vs 50:1 ?

[Moparmyway]

I wonder what Madsens charges for dyno time?

Probably alot less than all the chain costs

 

[redbull660]

It's nice to see if there would be a horse power difference, but it isn't everything. As I recall the 461's HP was almost higher than the 660's HP on chad's dyno. Yet in every test I did between them stock and muffler modded with 20 24 28 32" bars the 660 beat the 461. EVERY TIME usually by a fair amount. ie. NOT a slim margin.

 

[Bwildered]

It's nice to see if there would be a horse power difference, but it isn't everything. As I recall the 461's HP was almost higher than the 660's HP on chad's dyno. Yet in every test I did between them stock and muffler modded with 20 24 28 32" bars the 660 beat the 461. EVERY TIME usually by a fair amount. ie. NOT a slim margin.

It's sounds a bit like formula 1 testing , with all the millions of $ & time they have to develop & test engines & cars on dynos they are only permitted a few days on the track for testing outside the season, the real world testing where all the variables are is where the proof of the pudding comes out.
Thansk

 

[bwalker]

It's nice to see if there would be a horse power difference, but it isn't everything. As I recall the 461's HP was almost higher than the 660's HP on chad's dyno. Yet in every test I did between them stock and muffler modded with 20 24 28 32" bars the 660 beat the 461. EVERY TIME usually by a fair amount. ie. NOT a slim margin.

I'd say that particular dyno result is suspect then, which is no supprise. An accurate dyno is very uncommon, unless your one of the automotive OEM'S or some such. And just as important as the dyno itself is the operator.

 

[NWCoaster]

I'd say that particular dyno result is suspect then, which is no supprise. An accurate dyno is very uncommon, unless your one of the automotive OEM'S or some such. And just as important as the dyno itself is the operator.

I wonder if Stihl would have any information or testing on the effect of the different types of oil at different mix ratios.... not that they would probably divulge that kind of information.... they have a super fancy computer controlled dyno there in the facility in VB. Have you guys ever watched the video of them playing silent night on the Dyno with a chainsaw? Pretty cool. Looks like they have a s-load of dynos!!

 

[NWCoaster]

Here is the video;

 

[blsnelling]

It's nice to see if there would be a horse power difference, but it isn't everything. As I recall the 461's HP was almost higher than the 660's HP on chad's dyno. Yet in every test I did between them stock and muffler modded with 20 24 28 32" bars the 660 beat the 461. EVERY TIME usually by a fair amount. ie. NOT a slim margin.

I take it that you haven't run one of my 461s. Besides, ported is an entirely different ballgame.

 

[big t double]

I take it that you haven't run one of my 461s. Besides, ported is an entirely different ballgame.

ive heard through a grapevine that those things are pretty nasty when you get through with em.

 

[Ron660]

All my saws seem happy with 40:1, I see no reason to change. It is like using a 165 gr bullet in a 30-06 while some argue for 180 gr and others argue for 150 gr. My ballistic testing showed that bullet construction is more important than wt, so I actually use a 168 gr Barnes.

True but heavier aerodynamic bullets will have a higher sectional density (more penetration) and also a higher ballistic coefficient (B.C.) - (sustain higher velocities for longer shots). I like an extra advantage, more oil and higher B.C.'s, when you need it. But I agree a 40:1 oil ratio or a 165 gr. 308 diameter bullet will accomplish most of your demands.

 

[Ron660]

Anyone use Berger 185gr in a Win. .308 for hunting or would the Berger 168 be better. Around my neck of the woods a shot to 500yds would be very rare and would be clearcut or pipeline/highline shots. Most shots typically within 250yds

To heavy unless you have the right barrel twist.

 

[Ron660]

Barnes are great for shooting an animal in the vitals and having it run off like nothing happened. Especially in a 30 ought 6.

I've had extremely good luck with Barnes TSX 160's in a custom 7STW. I've never had one run over 60 yds. That was shot at 416yds trailing two does. The bullet entered behind the rib cage (angled from me) and exited his opposite shoulder. Nice 7pt. Swift sirocco's also always exit but leave a great blood trail. I've had several drop using TSX's and Sirocco's.

 

[mdavlee]

To heavy unless you have the right barrel twist.

1:11 will do to 190. 1:10 works to 240 grain in a 30 cal.

32:1 FTW

 

[KG441c]

1:11 will do to 190. 1:10 works to 240 grain in a 30 cal.

32:1 FTW

My 5r is 1:11.2 twist I think

 

[bwalker]

I've had extremely good luck with Barnes TSX 160's in a custom 7STW. I've never had one run over 60 yds. That was shot at 416yds trailing two does. The bullet entered behind the rib cage (angled from me) and exited his opposite shoulder. Nice 7pt. Swift sirocco's also always exit but leave a great blood trail. I've had several drop using TSX's and Sirocco's.

The elk I shot last year with a 180 TTSX out of a 300 rum wasn't impressed at all and it was shot at extremely close range with a the shoulder joint being exploded on entry.
There is no magic when it comes to bullet performance. Bullets that fragment some kill much faster, bullets with a wider frontal area kill faster. The Barnes doesn't fragment and had a narrow frontal area. Great for digging deap, but not so great for killing quickly.

 

[bwalker]

1:11 will do to 190. 1:10 works to 240 grain in a 30 cal.

32:1 FTW

That would depend on velocity,altitude and temp.
At 308 velocity I would think 1:11 woukdnt be the best choice. Especially in a hunting situation where a little extra stability is a good thing for straight penetration.

 

[KG441c]

That would depend on velocity,altitude and temp.
At 308 velocity I would think 1:11 woukdnt be the best choice. Especially in a hunting situation where a little extra stability is a good thing for straight penetration.

Wonder why snipers in the military like the 1:11.2 in the m24?

 

[huskihl]

The elk I shot last year with a 180 TTSX out of a 300 rum wasn't impressed at all and it was shot at extremely close range with a the shoulder joint being exploded on entry.
There is no magic when it comes to bullet performance. Bullets that fragment some kill much faster, bullets with a wider frontal area kill faster. The Barnes doesn't fragment and had a narrow frontal area. Great for digging deap, but not so great for killing quickly.

I used my 338RUM on a couple elk and a couple deer. 250gr swift Aframe are nicknamed "special non-tracking bullets" in deer camp. So far, one has yet to move post shot lol

 

[mdavlee]

Wonder why snipers in the military like the 1:11.2 in the m24?

They use 175 grain a lot now. The 300 win mag uses 190 grain.

 

[bwalker]

Wonder why snipers in the military like the 1:11.2 in the m24?

Humans are easy to kill and straight line penetration isn't as much of an issue, ditto with expansion as they are using Sierra Match kings which come unhinged more pretty easy. Plus there is the thought amongst certain people that the least amount of twist possible produces the most accuracy.

 

[bwalker]

They use 175 grain a lot now. The 300 win mag uses 190 grain.

The m24 a2 is a 300 win mag.