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Author Topic:   Jammin - Scaling??? and Push Wet.....
24ksi Racing
Member
posted May 18, 2000 08:15 AM
In certain conditions, when you do put in crossweight, you will loose RR bite, when this happens, your car will not set (no rr bite). This will help the car enter easier into the turns if there is not enough weight to transfer to the RR tire to make it set. Its basically the same as overloading the RR but when you overload the left rear, you still have bite coming off the turns. If you bury the RR, you will skate.


jammin
Administrator
posted May 18, 2000 09:18 AM
Also, look at where his lead is on the car and it will tell you that he has added too much left side weight(in this case) and that it needs to loose some weight off of the LR tire to make it work.


jammin
Administrator
posted May 18, 2000 09:24 AM
If you look on the Scaling Post, the guys says he is running 48.5 percent cross. That means his opposite is 51.5. He has too much RR bite to set the car he needed to even the distribution up. The weight is already on the RR tire. So, when your dynamic distribution changes, there will be entirely too much weight on the RR. On the other one, with the weight that he has on the car, the car will not roll that much, which meanse we are working more on the left side. With his cross being 52% and the lead being placed where it is. There needed to be less left rear in the car for this one to turn. There is a huge difference between 48.5% cross and 52% and lead hung where it is.

Doing the same thing on both posts but in different ways, but actually achieving the same thing.

[This message has been edited by jammin (edited 05-18-2000).]

24ksi Racing
Member
posted May 18, 2000 09:25 AM
Well, your crossweight will depend on several things. One, motor(how much), Two, roll(the more roll you have, the more cross you can put in the car and it will still unload for turning). But when you go over that point, it will push.

The left side weight is what is going to bring your car back down when the car rolls, or may keep your left side down if it doesnt want to roll because of your roll center....panhard, j-bar settings etc. But it is what keeps your left side on the ground, but that will not create the bite that is needed in accordance to the chassis, the cross will do that. But if the left side weight is too great, then you will not get enough weight on the RR springs to set the RR of the car either. Its all a give and take deal. Just finding that happy medium is where its at. Depends a lot on the driving style too, but just doing what I can to basically steer in the right direction.

[This message has been edited by jammin (edited 05-18-2000).]

jammin
Administrator
posted May 18, 2000 09:41 AM
Make sure you read the post before your last one, I revamped it.


sixwillwin
Member
posted May 18, 2000 10:53 PM
I thought I should respond to this discussion, I am the one that posted the original scaling question. For reference, I have electronic scales and use them weekly , I also use them properly. This was a new car last year that I could never get to handle like my old car. For the life of me, I cant stop it from pushing on entry and thru the middle, I had the cross down to 45% at one point last year and it still pushed like crazy on entry. Last week, when I won the feature, I had 50.2% cross in the car and needed some more(I think and will try Fri and Sat.) the car was very good, entry was good and I was a rocket off the corner, I was however very loose right at the apex. So for this weekend I have increased the cross to 50.6 % and I think the loose at the apex is too much rear steer when the car rolls. I have pulled the RR forward now 3/16"(it was even up with the LR.) I think this swill tighten me up thru the middle and off the corner. I ran this way with my old car with great success. My rear % is 49.9% and left is 53.5%. During the feature last week, people noted to me afterwards that my car was really rolling over in the corners, I dont really care at this point, cuz the car is much faster now,. I am getting about 3" of right side shock travel, so that does not seem excessive to me at all. Anyway, all I know is that 2.0% more cross made the car much better(not so tight) in the corner, I could then keep OFF the brakes and maintain more momemtum off, when it pushed bad entry before, I had to stab the brakes to drop the LF corner to get it to turn, and then my momemtum was killed for coming off. I will race with this setup twice this weekend, starting near the back both nites, so I will try to update my changes and results. BTW, tracks are both 3/8 mile medium to high banking. I stays tacky and one gets somewhat dry by feature time. Thanks sixwillwin


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