I use the phone app Iraceweight to get the percentages if the scales I'm using don't automatically read them for me. But since you said AMP is more left turns, more left side cross weight would be ok. Now if the front ends up being any more off you would just need to drop the light side of the spindle down 1 spacer. That is about where I like to keep split differences at most. You said your front is only about 5lbs different and the rears are 10lb. Once you get the front weight around 44% try and equal the front split. At first I was just going to say move the weights to the front of the frame, but you said the left rear is light anyways. You need to raise the front spindles up to get more front weight. But if you don't have one of the bearing adjusters you'll need to move the front spindle shims. That way you don't have to split the spindle heights and a sniper laser reads correct. I also use the adjustable left rear bearing cassette like is listed above. You want more front weight I normally run about 42 to 44% if not a little more. 85mi in length and it's very heavy on left hand corners, really only one right hand corner of any consequence. Local track is AMP near Atlanta if it matters. My question is this, how do the purpose built four cycle chassis' (MGM, Margay, Comet, etc) help in this area? Do they somehow offset the motor more to the left?Ī more general question is, given my dimensions, can I expect to ever get a more ideal weight distribution if I'm limited to adding only 15 - 20lbs to the kart to make weight? Once you get the front weight around 44 try and equal the front split. It could be a frame problem, as I've not had the opportunity to put it on a table, but I'm also concerned that it's related to the fact that the Praga is really built for the lighter two-cycle engines, and if that's the case I'm just chasing my tail. I'm also at about a 41.5% Front to 58.5% rear split, and that's with me about as close to the steering wheel as I can get, and the steering wheel in the most forward position it will go. I've moved the seat as far left as I can, and I've got the motor mounted as far left as possible on the Odenthal mount (running clutch in-board too), so I'm kind of out of options at this point. I'm at about 10lbs difference across the rear axle, light on the left rear and heavy on the right, and I'm also about 5lbs different across the front but in the other direction, left front is heavy and right front is light. I have to add about 15lbs to the kart to get it up to weight, with the weight concentrated on the left side of the seat as far back as I can mount it. I'm 6'1" 170lbs, and I have long legs and arms for that height, this has made seat positioning a challenge, especially as it relates to front/rear weight % and left/right weight %. My local track is a Praga dealer, so when I got into karting about a year ago, I went with the local brand for parts support etc. As noted earlier seat position and number of stays are a major tuning tool.Current chassis is a Praga Dragon EVO2. Once again, no real changes depending of our seat position.Ĭheck out they have some pretty good people on setup. Competitive karting guys have very specific lay up requirements for their seats for the above reasons.ĭon't you think it may be mainly due to the rise of the center of gravity? We have sliding seat with arround 20cm stroke. Well I had a horrible handling kart that I could not fix until the day I put the old seat back in. So my friend/sponsor made me a seat that supported me at shoulder height and not just around the ribs. I had cracked my ribs in a prior off and was impatient to drive again and anyone who has karted knows that cracked ribs and karting do not go together. Seat design also has an impact as I learned the hard way. How is it secured to the chassis? Removing or adding stays is a tuning tool normally as it can be a (forgotten) stressed member of the chassis. Garygph wrote:There are so many things that can have an impact as we all know and a lot has been mentioned, however I have not seen anything about the seat.
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