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JULY 2015 NEWSLETTER PREVIEWS

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YOUR KART TUNING AND MAINTENANCE SOURCE

Raceday.  The reason you test, the reason you train, the outright best part of karting.  But all the testing and training in the world isn’t going to help you win if you go kart is ill-prepared.  I can think of at least two race wins that I threw away because of a mechanical oversight.  I am pretty sure you can do the same.  To make sure this never happens again, I now have a pre-race checklist and routine to insure that my kart is race ready.  Regardless of whether your race is 300+ miles away or right around the corner, a mechanical is the last thing you need to experience on a race weekend…

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Categories : Prep Tips
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AJ Whisler

Editors Note – For those of you who don’t know AJ Whisler, AJ is one of the most highly regarded and well respected Tuners in North America.  Why did I choose AJ to guest write an article on the importance of chains and proper chain maintenance?  A few years ago, I ran into AJ at my hometown track during the height of the Super Pro era and he told me something that stuck with me to this day.  He said that the teams he worked with had been noticing a 50-100 rev advantage on longest straight with new chains in a shifter kart and up to 400 rpm in an ICA (20,000 rpm) engine.  Because of this, some of the teams were putting new chains on their go karts for every heat and main event.  Realizing this was not economically feasible for 99% of karters, AJ went on to do many hours of dyno and track testing and development to come up with low friction, highly durable chains that you don’t need to replace for every race to maintain peak performance.  (For more information on AJ’s chains, click here to be taken to AJ’s website whisler-racing.com).  So, who better to give us tips and technical insight into optimizing your chain than AJ Whisler…

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Categories : Engine Tuning
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While Medium and Long Hubs are shown here, purchasing a set of Short Hubs and Collars should cover most tuning needs.

While they may be small and not necessarily the most sophisticated looking piece on your go kart, hubs and collars can make a big difference to your kart’s handling.  Funnily enough, when I first started shifter-karting recreationally, the only reason I put a collar on my kart was to stop the rear hubs from creeping in.  I then attributed the subsequent handling change to changing track conditions.  Now I know that changing the hub length, either by using a different size hub or adding or removing collars, is essentially changing the axle’s spring rate which will definitely affect how your go kart handles.  In fact, one simple hub change has been the key to a number of my ProKart victories over the years.  The trick is to find out what your go kart likes and then determine if your go kart is more hub or axle sensitive.  I’ll explain…

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Categories : Chassis Tuning
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The Start! Are you ready for the race? (Photo courtesy of On Track Promotions)

Let me ask you a question.  What are you doing on the Warmup Lap to prepare for the race?  If your answer is simply warming up the tires, you are leaving a lot of opportunity on the table.  I remember the first time I saw Fernando Alonso bring his Renault up to the line with that signature violent wiggle (as opposed to everyone else’s weave.)  At first I thought, that’s a little over the top.  Yes, it is an impressive display of car control (900hp, cold tires, and full-tank weight being rapidly transferred from side to side).  Now I realize that Alonso has revolutionized the art of the warming up an open wheel race car.  Everyone has copied him and there is more to his method than first meets the eye…

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The ICC Engine – Pure, Raw Power

The ICC engine.  The fastest, most powerful engine in sprint karting.  Perhaps it’s fitting that the pinnacle engine in karting is also the most complex and difficult to jet.  I personally relished this challenge when I raced my ICC as you can gain or lose a significant amount of time with your jetting.  Once you get it right though, nothing compares to the crisp violent acceleration and responsiveness of the ICC engine.  So let’s make sure that you are dialed in…

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Categories : Engine Tuning
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For those of you that missed it, I ran some data analysis on the SuperNats.  Here’s some highlights:

  • Average Size of each Class:  49 Karts
  • Average number of karts to qualify within 1 second of pole:  29
  • Class with most karts qualified within 1 second of pole (Tag Senior):  40
  • Average number of karts to qualify within 1 second of pole by percentage: 70%
  • Highest percentage of karts to qualify within 1 second of pole (S1):  100%
  • ENTIRE 22 KART FIELD IN S1 WAS COVERED BY 0.827 SECONDS!!!

It’s fair to say that qualifying has always been important.  Given the stats above, I would argue that over the last couple of years qualifying has been more important than ever.  Three or four years ago, two tenths may have only cost you a spot or two, now it can cost you ten.  Furthermore, if you race on a narrower track where passing is more difficult, qualifying could be the race.  Add the fact that a lot of series give you extra bonus points for pole and you start to get the point.

So how do you optimize your go kart for qualifying?  Well, we’ve touched on a number of issues before but I will tie them all together here so you have a concrete plan to put your go kart toward the sharp end of the grid…

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Having just returned from the Indy 500, it felt as good a time as any to discuss how to approach and maximize fast corners.  In addition, I have just recently finished coaching some drivers including some lead-following in the go karts and realized fast corners are a common area that is challenging many drivers.  Fast corners are tricky not only because of their sheer speed and intimidation factor, they also requires precise timing.  Consequently, after following drivers on practice nights for many years and from my recent coaching experiences there seems to be three basic errors that many drivers make when it comes to negotiating fast corners.  These errors actually conspire to reduce your confidence making the process of conquering fast corners a vicious psychological circle.  Once these errors are addressed and rectified, fast corners actually seem easier and more comfortable to negotiate even as you start going faster and faster.

To wet your appetite, I have included a link to an interesting video sent to me by one of my subscribers regarding Schumacher and fast corners (Click here to see the video).  Pay particular attention to the data segment of the video.  I’ll explain how to translate what you learn in the video to your own driving on the track…

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When I was given the opportunity to switch to the Zanardi chassis for two seasons, I was excited for many reasons.  First, after being on a Tony chassis for nine years it would be a great challenge from a tuning standpoint.  Second, it would put me directly in my readers’ shoes as I would be learning a new chassis while applying all the techniques and tips from the newsletter without knowing the outcome.  Third and most importantly, seeing how the Zanardi would react to changes will give me a broader scope and insight into what many other drivers are experiencing with their own kart therefore improving the articles.  When it comes to tuning with ride heights, this is precisely what happened…

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Categories : Chassis Tuning
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Prospeed Components’ Perimeter Throttle Kit should be standard equipment on all karts. It’s that good.  (Click on picture to enlarge)

Ever look at your kart and wonder why the throttle cable adjustment is so far away from the throttle pedal?  Ever think to yourself that as beautifully engineered as your kart is why does the throttle cable look like an after-thought that has never been addressed since the first kart was invented in 1959.  Well, luckily for us Roger Hargens of Prospeed Components did and has come up with the best throttle cable routing system I have ever seen.  Not only is it beautifully engineered, it is 100% functional in its purpose, completely eliminating the trailing throttle understeer caused by most kart’s current throttle cable set-up.  The system is so cool, almost everyone that has seen it on my kart has vowed to get one.  Once installed, it looks like a factory part worthy of its place with the rest of your kart’s components…

Click here to finish article (no subscription required!).

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As I mentioned in last month’s article on Spark Plug Reading, Plug Reading will get you close but to really optimize your jetting, you need to incorporate the piston read and data analysis into the equation.  Without data analysis, you will have no real way of determining what your optimum spark plug and piston color should be.  In addition, the piston will give you a better indication of whether or not you are too lean and/or detonating, the first sign that you are on the edge of optimization and on the verge of a blow-up…

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