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Tourer
Posts: 329
scotts valley, California | My Vision only has 32k+ miles on her, but some of them have been what for a lesser bike would be called hard miles. Some of you must be pushing six didgits by now. Kevinx was kind enough to make modifications that just make it way to easy to run into the red line area on my tack. I don't know what the rev limiter is set at, but six grand and she's still pulling hard. My question is just this: has anyone blown up one of these Polaris 106ci V-twins? What did it take to do it? How many miles? Sorry to ask, but what kind of oil? No, I am not trying to blow it up. In fact I really do not want to blow it up. But worse than that, I don't want to keep too tight a rein on her and break her spirit. |
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Visionary
Posts: 8144
New Bohemia, VA | ...without regard to any rev limiter my Vision continues to have spirit that exceeds my expectation... |
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Tourer
Posts: 446
East TN | Would be interested as well to know if there have been any failures from a 106 CI...Got 21K on mine and she still has SOUL and power to get up and GO!! |
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Visionary
Posts: 3204
Memphis | Rumor has it from some pretty reliable sources that the bottom end of the 106 is engineered to withstand about 150 horsepower. Nitrous is an option that will put out about 140+ hp on the stock motor. Lloyd will probably be happy to answer any questions you have about blowing up a 106. |
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Tourer
Posts: 329
scotts valley, California | Thanks for the feedback, guys. I'm beginning to believe that these things really are bullet proof!
Michael, how do I get ahold of Lloyd? ... Incidentally, loved your Amsair poster! |
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Visionary
Posts: 3204
Memphis | http://www.lloydz.com/contact.asp |
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Visionary
Posts: 1484
LaPorte,Tx. | Normally engine reliability is measured by piston speed. With the 106 motor having a fairly long stroke, piston speed and your rpm is an important factor on engine life. At 6000 rpm engine speed the piston is traveling ~4250 ft per minute. This is what is considered normal for heavy duty engines with forged cranks, light weight forged pistons, peened rods, etc. Around 5000 feet per minute is where racing engines run. I know the Victory motor is well built so it should be able to take the 6000 rpm. Just keep and eye on your piston speed and you'll be ok. Stroke 4.25" x 2 x RPM/12 = piston speed |
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Tourer
Posts: 329
scotts valley, California | So, let's see... 5000fpm is a little over 7000rpm according to this formula. Surely my rev limiter should kick in before that. A couple of questions come up for me: are we talking about V-twin racing engines? and how long do racing engines last running at 5000fpm?
Also, it seems to me that engine load would be a factor in how high rpm wears on an engine; ie winding out with minimum load like in neutral or the lower gears might be more hazardous than running at the same rpm with a significant load on the engine. Whatcha think? |
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Visionary
Posts: 1484
LaPorte,Tx. | Victory put a rev limiter on the 106 of about 5500 rpm. Some folks have decided to override that limit based on the fact that they can. So I'm pretty sure they sold the ability to over ride the 5500 rpm at your own risk. All I know the Victory motor has a 4.25" stroke. Look around and find motors that run say 10,000 rpm and see what length the piston stroke is, and then you will realize, this is not a high rev'r motor. |
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Tourer
Posts: 329
scotts valley, California | Thanks, VT. I'm not worried about it any more. An' I ain't a gonna slow down either. Following is Lloyds response to my concern:
"GUY, THE LAST THING I WOULD WORRY ABOUT IN LIFE IS BLOWING UP YOUR VICTORY MOTOR!
Keep doing your maintenance and oil changes and you should see 6 figures without an issue."
THAT KIND OF SAYS IT ALL!!! LET'S KEEP PUTTING THE PEDAL TO THE METAL AND KEEP SMILING >>>>>>>>
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Tourer
Posts: 353
| Blue Sky Guy - 2010-10-17 1:50 PM
Kevinx was kind enough to make modifications that just make it way to easy to run into the red line area on my tack.
Hey Sky, did Kevin give you the upgraded rev limit or you just talking about the cam upgrade? |
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Iron Butt
Posts: 725
Reno County, KS | This is good tech info Tex. It really explains why 6 cylinder bikes like the wings or big diesels are so long lived. I always chalked it up to wear distribution for larger engines but never knew the engineering behind it. Do you happen to have a ballpark number on that last bit of data (i.e. "X" Piston speed="L" longivity average)? Can you throw out an estimate of what this might be? I'd really be interested in that figure. I know Paradox has a quite a few miles on his bike, so I don't have much to worry about in the near-term. Hell, this one MAY actually make payoff! I think I'll take this bit of info down to the Engineers onboard tomorrow and rub their nose in it. LOL Amazing what you learn from a bike forum, huh? |
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Visionary
Posts: 1484
LaPorte,Tx. | Yah, I stayed at a Holiday Inn Express last night, so I'm feel'n purty dang smart today. Now...wait a minute, what were we talking about? Oh, that's right how long will it last, now that has to do with the lubricant you use. Use a poor lubricant and it will explode really fast which is no fun at all for anyone, use a super slick and it will last for a long long time! Uhh, now that oughta impress them there engineers!  |
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Tourer
Posts: 329
scotts valley, California | Kevin's work was the cam upgrade, increased air intake and Lloyds electronic gadget, nuttin to do with the rev limiter. Now that I know that my engine will survive the revs, I'll see if it kicks in somewhere over 6k. Tralphaz, weren't you there when Kevin worked on my bike?
Oh, and VT, what all did you do at Holiday Inn Express? |
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Cruiser
Posts: 81
Salinas, Ca. | Guy, I think Tralphaz is leading up to how or if you are truly hitting 6k? Did Kevin also install one of Lloydz Extended Rev ECU's or was something else done to your bike like tricking the gear indicator. Normally, our bikes hit the rev limiter at 5400 RPM's. Well, it made me wonder anyway, when I read that you were hitting 6k........ |
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Tourer
Posts: 329
scotts valley, California | I can not totally swear that I'm hitting 6k. At that speed I have only glanced at the tack and know that it is near the upper end of the red and at that point I am either shifting or letting off on the gas. I can say for sure that I've never hit the rev limiter and that I am quite sure that I have pushed, if not passed the 6k mark. I'll check it out on dry pavement sometime in the next couple of days and get back to you. |
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Tourer
Posts: 423
northwest florida | I have hit the rev limiter once and it surprised me. Then it dawned on me what it was. I found out through experimenting that if you aproach 6Krpm in a controlled throttle then you can do it. But if you are heavy handed, then it cuts out at 5.4K rpm or so. |
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Tourer
Posts: 329
scotts valley, California | What do ya'll think of running rpm like that in third or second gear where there is less load on the engine? Or the extreme example, neutral?? I tried to push 6k today in fourth gear but ran out of highway room before I got there. (traffic) |
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How they holding up???
