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Antoine Marcade
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Curtis Cooksey
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Joined: 16 Aug 2001
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 Posted: Wed Feb 20, 2013 10:33 am Post subject: Aixro |
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It has a lot more to do with the driver than the motor.
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Jim McMahon
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| Posted: Wed Feb 20, 2013 10:37 am Post subject: |
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No surprise. Aixro should be faster anyway, but there was a driving difference there for sure. Shifters are pretty obese as karts go and especially on tighter tracks are slower than the more nimble karts of old.
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Antoine Marcade
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| Posted: Wed Feb 20, 2013 4:30 pm Post subject: |
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Thanks for the comments on the driver 
I find interesting to see the performance is generally similar between the two. Actually on the day my laptimes were in the same tenth as the best KZ. |
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Brian Degulis
Joined: 13 Aug 2012
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Location: United States, Florida,
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| Posted: Wed Feb 20, 2013 7:29 pm Post subject: |
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It's a mystery to me why that engine isn't more popular in the USA
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Chris Hurst
Joined: 27 Jul 2007
Posts: 572
Location: United States, California,
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| Posted: Wed Feb 20, 2013 7:45 pm Post subject: |
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2min 6sec was a close call 
I've always liked these motors and would love to own one someday. Seems like a good alternative to a shifter with the rebuild times etc. Great torque as well. Wonder why they aren't more popular? |
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Joseph Johnson
Joined: 28 Aug 2007
Posts: 227
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| Posted: Wed Feb 20, 2013 8:05 pm Post subject: Rotary |
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| They are not as popular because when they blow up not everyone can fix them. Power is made at higher rpm's but the motor doesn't oil on decel. So after those long straightaways at 11,000 rpm's the crankshaft can only take so much |
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TJ Koyen
Joined: 03 Oct 2004
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| Posted: Wed Feb 20, 2013 11:02 pm Post subject: |
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We had this discussion not too long ago too.
$5k + for an engine that you can't race in a class anywhere. No wonder no one buys these.
If it had a class that'd be another story, because it's an awesomely powerful piece.
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Brian Degulis
Joined: 13 Aug 2012
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| Posted: Thu Feb 21, 2013 5:40 am Post subject: |
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That's kind of the catch lots of guys like them but won't buy one without a class and there won't be a class unless more guys buy them. Why did they catch on across the pond but not here?
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Jim McMahon
Joined: 07 Apr 2007
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Location: United States, St. Paul,
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| Posted: Thu Feb 21, 2013 5:43 am Post subject: |
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| Brian Degulis wrote: | That's kind of the catch lots of guys like them but won't buy one without a class and there won't be a class unless more guys buy them. Why did they catch on across the pond but not here?
Brian |
They didn't. Faired better than here sure but not very popular.
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Jim McMahon
Joined: 07 Apr 2007
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Location: United States, St. Paul,
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| Posted: Thu Feb 21, 2013 6:31 am Post subject: |
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| Antoine Marcade wrote: | Thanks for the comments on the driver
I find interesting to see the performance is generally similar between the two. Actually on the day my laptimes were in the same tenth as the best KZ. |
It should be faster than KZ... What's is your package weighing in at?
| Joeseph Johnson wrote: | | Power is made at higher rpm's |
Have ya seen a dyno curve for this? Not exactly what I'd call peaky!
| Joeseph Johsnson wrote: | | but the motor doesn't oil on decel. So after those long straightaways at 11,000 rpm's the crankshaft can only take so much |
Really long straights are an issue. (ie road racing is out), but not for the reasons you state. Its been discussed a few times how the lubrication system works in this motor and it has zero to do with lube (or lack thereof) on the overrun.
The very early models without a rev limiter crapped themselves out a times (apex seals I believe) when overrevved but that issue was resolved years ago.
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Brian Degulis
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| Posted: Thu Feb 21, 2013 12:57 pm Post subject: |
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I don't know they seem pretty popular in Europe. You guys can come up with all the graphs and theory's you want but if you drive one it's hard not to like it.
Brian |
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Antoine Marcade
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| Posted: Thu Feb 21, 2013 1:59 pm Post subject: |
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| Jim McMahon wrote: |
It should be faster than KZ... What's is your package weighing in at?
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I don't think it is that straight forward to say one is faster than the other one, it depends on many parameters: engine, chassis, driver, set up, track layout, etc... For example on this video I went straight to the race without practice on a track I have visited once before against local guys and on tyres I was driving for the first time... So I had room for improvement.
Generally an Aixro vs a good KZ (recent and prepared) it is very similar in performance in the dry but not similar in maintenance and for me that's the beauty of the Aixro.
In wet condition, not sure if anything is faster than the Aixro - when we do race weekends in the wet our lap times comparing to all other classes are from another planet. Example in video of me doing a practice sessions with superkarts at the same track: http://www.youtube.com/watch?v=SylquVkSHZ4&feature=share&list=UUYuswK3WgRD9tjGt3F8Dnvw |
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Jim McMahon
Joined: 07 Apr 2007
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Location: United States, St. Paul,
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| Posted: Thu Feb 21, 2013 8:14 pm Post subject: |
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| Antoine Marcade wrote: | | I don't think it is that straight forward to say one is faster than the other one, |
In some cases its not all that clear, but in this case its pretty cut and dry. The Aixro should have the upper hand in most circumstances. Lighter package, similar peak power and has a broad torque band. It doesn't require you to lift of the throttle every couple of seconds to change gear. If both KZ and Aixro are running to a similar level of tune, the Aixro will be faster.
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Antoine Marcade
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| Posted: Fri Feb 22, 2013 12:12 am Post subject: |
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| Jim McMahon wrote: | | Lighter package. |
I understand now you mean: comparison without ballast. In the UK we run the Aixro at 180kg like the KZ2, some of us have to put up to 25kg ballast... Once the ballasts are removed it will be definitely a clear cut situation. |
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