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What is the factory tune on 2008 Head iM78?

post #1 of 22
Thread Starter 

Is it 1 base/2 side?  I want to touch up my base/side edges and am curious what setting to use.

post #2 of 22

You need to measure your base and side edges if you want to know what they are. Edge bevels vary from ski to ski and no factory is consistently making uniform edges.

 

You can get a tool to measure them, or, get the tools you need to bevel your edges the way you want them, then when you are finished you will know exactly what they are. 1/2 or 1/3 is great on those skis.

 

 

post #3 of 22
Thread Starter 

Okay, thanks.  I actually have a bevel tool that allows for dialing in at 1/2 degree increments. Can you give me any guidance as to how many passes along the edges with the bevel tool until I'm at or near what it is set too? 

 

I see you frequent Taos regularly.  I hope to be there next weekend and can't wait to check it out!

post #4 of 22

I can almost guarantee that they aren't what they should be, or what Head says they should be. They rarely if ever are.

Check in the tuning forum, and you should be able to find a few posts listing what Head says the edges should be.

While you are at it, consider taking them in to a good, reliable shop for a proper tune. Especially if they are fresh out of the wrapper and have never been ground truly flat.

Even the best manufacturers bases are rarely flat, as skis continue to cure for weeks after they have left the production line. And if the bases aren't flat, then you can be sure that the edges aren't true either.

 

Mike

post #5 of 22
Thread Starter 

ctskierguy --

 

Thanks for your input.  I actually bought the skis used, and the previous owner indicated they had been on a stonegrinder (about 10 total days on the skis).  I skied them yesterday for the first time on ice, slush, frozen granular type conditions and they held up really well, nice edge hold when it was needed and plowed through everything else.

 

I'm just wondering if I could improve on that using my one edge bevel tool as opposed to having a shop do it. 

post #6 of 22

My 78s are nominally 1/2, but slightly inconsistent from front to back. 

post #7 of 22

ski steep...I hope you enjoy your trip to Taos.

 

Get a Sharpie marker and cover your side and base edges. Then run your tool over your edges...

The file or stone (whatever is in your tool) will remove the marked area where its working. I hope that makes sense. Go to http://www.slidewright.com and check out the tutorials on edge work. I just did mine, can hardly wait to get back to Taos.

 

I would not take them to a shop. Sounds like you are already equipped to do it yourself.

post #8 of 22
Thread Starter 
Quote:
Originally Posted by Snowfan View Post

 

ski steep...I hope you enjoy your trip to Taos.

 

Get a Sharpie marker and cover your side and base edges. Then run your tool over your edges...

The file or stone (whatever is in your tool) will remove the marked area where its working. I hope that makes sense. Go to http://www.slidewright.com and check out the tutorials on edge work. I just did mine, can hardly wait to get back to Taos.

 

I would not take them to a shop. Sounds like you are already equipped to do it yourself.

 

Thanks for your help and the link!

post #9 of 22

Mine are going to be 1 and 3 when I get them flat---

 

Mine are also used and seemed in good shape but would not hold well nor engage the tip very well.

 

I finally decided to see if they were flat and what the geometry was, they were not flat, actially quite convex and the existing side bevel seems to be about 2 on  and I think about 1 on the base---but thats just a  guess

post #10 of 22

You're welcome.  I demo'ed some im78's...really liked them, wouldn't mind owning a pair. Fast, damp, smooth. Nice ski.

post #11 of 22

I've owned the im78's since spring '07, New from the factory I felt they did not peform well as expected on groomers. Factory specs are 1/2. As others on this forum have said typically they are no at factory specs when new. After 3-4 days in Jackson last year I went to a reliable shpo and had them tuned to 1/2. The results were quite significant. Great edge hold and turning ease on groomeres and plenty of forgiveness in crud, and moguls. Not bad in crud either. Some here suggest 1/3 for the im78, im 82 and im 88, but I only went with the 1/2 and was quite pleased. Have them tunedy a reliabe shop.

Bluebear

 

post #12 of 22

The word I have always been given is that Head skis are 1/2 degree base bevel and 1 degree (89) side edge.

 

This is from head Canada technical people.

 

That being siad - change to whatever angles you prefer - it does not take long nor is it difficult.  I always change my skis to 88 degree side edge and most racers in our area are using 87 degrees.

 

Mike

post #13 of 22

one of the shops here push getting a prep tune when buying a new ski. I always thought it was an added unnecessary expense. I always just ski them as delivered from the factory. After reading this thread, maybe there is something to having a new ski tuned to specs before skiing.

post #14 of 22
Quote:
Originally Posted by Bluebear View Post

 

I've owned the im78's since spring '07, New from the factory I felt they did not peform well as expected on groomers. Factory specs are 1/2. As others on this forum have said typically they are no at factory specs when new. After 3-4 days in Jackson last year I went to a reliable shpo and had them tuned to 1/2. The results were quite significant. Great edge hold and turning ease on groomeres and plenty of forgiveness in crud, and moguls. Not bad in crud either. Some here suggest 1/3 for the im78, im 82 and im 88, but I only went with the 1/2 and was quite pleased. Have them tunedy a reliabe shop.

Bluebear

 

Head's 'tuning' is a complete disaster.  Skis are being shipped with massive base bevels in spots and highly inconsistent side bevels.  I've noticed the side bevels near the tails are awful - they've almost rounded them over.

The base needs to be flat.  The base edge bevel - well a true one degree is pretty good.  I wouldn't go more, you could go less though good luck with that starting with a Head factory ski.

The side edge - 2 or 3.  Atomicman recommends three.  Don't sweat it - that's easy to change.  The base though - that could require several stone grindings because they come from the factory so butchered.

 

post #15 of 22
Quote:
Originally Posted by mikehoyt View Post

 

The word I have always been given is that Head skis are 1/2 degree base bevel and 1 degree (89) side edge.

 

This is from head Canada technical people.

 

That being siad - change to whatever angles you prefer - it does not take long nor is it difficult.  I always change my skis to 88 degree side edge and most racers in our area are using 87 degrees.

 

Mike

First off, I'd love to see the Head ski that came to a shop with a 1/2, (one-half), degree base bevel!  Seriously, that's a joke. More like 1-5 degrees.  That's one to five degrees base bevel.  It's all over the place.

 

I wish these technical people would tell the manufacturing people to get their act together.  The situation with Head skis is a total disgrace.  Seriously, these very expensive skis are coming to shops with horrendously poor bases.  They look ok until you check the edges with a true bar. They ski like crap until they're properly tuned.  Why should shops have to deal with this? (Most don't btw)  

 

It's one thing to have to stonegrind a new ski.  It's another to have to spend a lot of time on a stone grinder to get the base to the point where you can even get a one degree base bevel.

 

What's the point of freakin' 'Intelligence' in the materials when the manufacturing process is moronic?

 

Does it matter? If you ever ski on packed to firm snow, yes.

 

 

post #16 of 22

Agreed -- anybody know a good way we can communicate this up to Head?

post #17 of 22
 hi,
i know this thread is a year old; i bought IM78's in killington last week. couldn't wait to ski them......
I immediately felt something amiss while entering the line of thew first chair. I skied 2-3 runs, they were sloppy at best; they felt like i was riding bottom only.
i had the bindings mounted flat and figured it was probably me.

the following weekend i tried again felt like i was overworking the ski, thats it... i went and got my prophet 90's (mounted flat as well)
voila.... I CAN ski.

so i go back to the shop and tell them the story,  the owner ( or so he appeared to be) tells me; the factory tune is best, yada, yada, yada....  i could leave the skis ( i drove 25 miles to get them as i ski at okemo) but he'd hate to touch the FACTORY TUNE)
 
frustrated, i bring the skis to the local trusted ski shop, the tech checks them ( with the gauge) and says they are the worst case of "base high" he's ever seen.

new tune... presto-chango, i now understand the communal affection for this ski.
ps. will never return to that shop again, how can the dealer be so uninformed of the products he sells?
and to pay for a tune after spending $ on a new ski, disgraceful.
post #18 of 22
 Heh, Head continues to have some lousy tunes.  I don't know why they can't be more consistent.
post #19 of 22
I was considering a set of Head SuperShapes, but uuuhmmmm I guess not now.

Who needs that?

There's a Head rep out here, it would be interesting to see what he has to say?

Reminds me of some guitar manufacturers that have the nerve to sell a $1000+ guitar that then needs a $300 visit to a guitar tech to get the neck alignment correct. Yet, Yamaha pumps out gabillions of $200 guitars and each one is perfect right from the factory?

I dunno... I remember there was a day when nothing was better than a nice set of new Head Comps, ...but that would be showing my age, wouldn't it?
post #20 of 22
Quote:
Originally Posted by srl1215 View Post

I was considering a set of Head SuperShapes, but uuuhmmmm I guess not now.

Who needs that?

There's a Head rep out here, it would be interesting to see what he has to say?

Reminds me of some guitar manufacturers that have the nerve to sell a $1000+ guitar that then needs a $300 visit to a guitar tech to get the neck alignment correct. Yet, Yamaha pumps out gabillions of $200 guitars and each one is perfect right from the factory?

I dunno... I remember there was a day when nothing was better than a nice set of new Head Comps, ...but that would be showing my age, wouldn't it?
 

you can buy my mags with a edgewise .7/3 degree tune for 500 bucks
post #21 of 22
Quote:
Originally Posted by srl1215 View Post

I was considering a set of Head SuperShapes, but uuuhmmmm I guess not now.
 

I wouldn't let it deter you from buying Heads (it doesn't deter me); just be prepared to give them a real tune if needed.

Dynastar isn't much better.  So far K2 and Fischer have been doing OK in my experience.
post #22 of 22
  at this point i highly recommend the head im78's, they are lively and are responsive. they love to be loaded and released.
they actually sling you into the next turn. they dont edge like a dyna 4X4, but hey these skis rock.
 id buy them and just resign myself to getting a good tune immediately.
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