Jon,
My response has to do with numerous people over the years asking for far too
specific information repeatedly, note: unless youre a top 5 team you
probably have never fully experienced this. I dont compete any more but I
clearly remember having to keep the guards on the car at all times or
someone would literally try to count the teeth on the sprocket. Its one
thing to ask how to tune a CVT and its another to out right ask for what
springs and weights people use. That is like walking up to a girl in the
mall and asking what her dress size is. Sure someone might tell you but
its rude and serves you no purpose if the weight and gear ratio of their
car is different from yours.
How to tune your CVT:
1. Set the drive CVT to engage slightly above the idle speed of your
engine.
You might have 2 options for this and the supplier/manufacture should be
able to tell you the engagements points for various spring weight combos.
2. Find a long straightaway and timing equipment. Two people with a stop
watches will do a descent job of timing.
3. Test different springs in the driven, might have 3 options.
4. Pick the fastest combination in 100 to 150 feet and try a slightly
higher/low gear ratio to see if you get an improvement.
Might take days, weeks, or year to find a winning combination but youll
learn something. In the real world companies spend trillions of dollars to
develop and protect information like this. So you can call me a prick for
my response but I feel like people who ask this kind of questions are
insensitive to the hard work other people have devoted to their design.
Maybe the information isn't valuable to you because you didn't go through
the process to obtain it.
>From: "Jon Hastie" <jon.hastie@gmail.com>
>To: "John G." <jjjsix6@hotmail.com>
>CC: semperfi915@excite.com, mini-baja@autox.team.net
>Subject: Re: CVT Tuning
>Date: Fri, 31 Mar 2006 09:40:46 -0500
>
>Alright. I think this guy understands that it won't be an exact solution.
>What he is looking for is a starting point. If you don't want to help him
>fine, but you don't need to be a prick about it. Some people on this list
>may be generous enough to tell him some specs about how they tune theres to
>give him some help.
>
>If you feel that you do not want to help any other teams, that is ok.
>Please remember not to ask for help when you need a replacement bolt or
>your
>car gets stuck in the woods.
>
>
>On 3/30/06, John G. <jjjsix6@hotmail.com> wrote:
> >
> > Hi, I would like for you to give me information it took weeks of
>testing,
> > perhaps years, to obtain and probably has no relevance to my car because
> > of
> > the vast difference in weight and design.
> >
> >
> > >From: "" <semperfi915@excite.com>
> > >Reply-To: "" <semperfi915@excite.com>
> > >To: mini-baja@autox.team.net
> > >Subject: CVT Tuning
> > >Date: Thu, 30 Mar 2006 17:20:48 -0500 (EST)
> > >
> > >Hi all. Our team is running a Polaris P-90 PVT this year and it is our
> > >first time doing so. I am curious if anyone who has run this system in
> > the
> > >past could recommend which springs and weights tend to get good results
> > (if
> > >other than the Polaris recommended springs and weights). In addition
> > what
> > >range of weights and springs we should purchase for testing in order to
> > get
> > >the right tuning for our car. Thanks.
> > > -Michael LaRose
> > > Cornell University
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