Left side weight

[75t]

My question is would raising the left side weight help side bite and forward bite or would this make it really loose on a slick track we run 450lf 300 RF 225lr 200rr 300 for lift bar spring second hole from rear. We are currently running left side weight at 53% rear percent 54% we just need a little more drive off it seems close.

[MBR Performance]

Adding left side % will free the car. Possibly bump your rear to 54.4

[a25rjr]

Raising it physically or just the %?

[75t]

What would work best raising or lower the weight or adding weight right now the weight is mounted fairly low

[let-r-eat]

Raising the weight raises the CG which promotes transfer. This could aid in sidebite or forward bite.

[CCHIEF]

Not knowing the details of your car, but normally to me you would want your rear springs in the opposite arrangement, 200LR 225RR. That arrangement should add forward, side bite, and aid in correct car attitude over your current arrangement.

[Mr.Kennedy777]

Sometimes running too soft of a spring in the lift arm or torque link can counter act what you are trying to do. More of the torque is wasted into compressing the spring rather than moving the car ahead with the most torque it can handle before breaking free. It robs power that could be used to drive the car. Another could be the gearing too. If you're out there, that will hurt forward bite. My honest opinion is if you are having problems hooking up on exit, you might want to avoid putting a stiffer RR spring in. To me it looks like the front is too soft for in the middle of the corner. You have to think of lateral weight transfer. The most side bite you will get will happen when the RF and RR are sharing close to the same load. The most forward bite you will have is when the LR and RR are evenly loaded. With your soft front springs most of the lateral load transfer could be getting dumped on the RR spring, this makes the car loose through and out the corner. Run stiffer front springs if you aren't on a bump device. Also if this is the case then you will find the extra weight on the rear will actually make your problem worse in the middle with the softer front springs. It will help tighten your entry but loosen in the middle and out of the corner. 53% left side is actually pretty low too. Your front spring rates and/or shock numbers versus the rear rates and shock numbers, are what I would really look at, it sounds to me that you aren't getting enough weight back onto the LR for exit, and over working the RR spring through the middle and on exit, and that's hurting your side bite and forward bite.On a slick track a stiffer LF will help tighten entry, softer RR over RF will help tighten in the middle and stiffer LR over RR should help get the most forward drive on exit as long as the LR isn't doing more work than the RR.

[Matt49]

Sometimes running too soft of a spring in the lift arm or torque link can counter act what you are trying to do. More of the torque is wasted into compressing the spring rather than moving the car ahead with the most torque it can handle before breaking free. It robs power that could be used to drive the car. Another could be the gearing too. If you're out there, that will hurt forward bite. My honest opinion is if you are having problems hooking up on exit, you might want to avoid putting a stiffer RR spring in. To me it looks like the front is too soft for in the middle of the corner. You have to think of lateral weight transfer. The most side bite you will get will happen when the RF and RR are sharing close to the same load. The most forward bite you will have is when the LR and RR are evenly loaded. With your soft front springs most of the lateral load transfer could be getting dumped on the RR spring, this makes the car loose through and out the corner. Run stiffer front springs if you aren't on a bump device. Also if this is the case then you will find the extra weight on the rear will actually make your problem worse in the middle with the softer front springs. It will help tighten your entry but loosen in the middle and out of the corner. 53% left side is actually pretty low too. Your front spring rates and/or shock numbers versus the rear rates and shock numbers, are what I would really look at, it sounds to me that you aren't getting enough weight back onto the LR for exit, and over working the RR spring through the middle and on exit, and that's hurting your side bite and forward bite.On a slick track a stiffer LF will help tighten entry, softer RR over RF will help tighten in the middle and stiffer LR over RR should help get the most forward drive on exit as long as the LR isn't doing more work than the RR.

Nope....on the LR part at least. Late models aren't street stocks. Softer LR creates a ton of forward bite with a LR spring behind setup.

[Mr.Kennedy777]

Nope....on the LR part at least. Late models aren't street stocks. Softer LR creates a ton of forward bite with a LR spring behind setup.

That's why I said, IF the LR isn't out working the RR. A softer LR spring doesn't produce more "bite" it helps equal out the loading on the rear tires when you are on the bars. And, a softer spring tends to need more pre loading which helps overall traction. If I am not mistaken I did say maximum forward drive occurs when you load both LR and RR evenly correct? When you're up on the bars the left rear tire moves ahead quite a bit and it loads that tire a lot. So in that case you run a stiffer RR spring and get more forward drive but, he never did say that he is up on the bars. Not all fast setups run on the bars either. Some cars run the j bar on the right side of the frame and an overall lower attitude, and are hella fast. It depends on how you set up the car. In some cases a stiffer LR offers more forward drive and in other cases, a softer one does. It all has to do with how the car uses the combination of mechanical and elastic weight transfer methods. A softer spring tends to require more pre load and as a result is compressed more at the same ride height as a stiff one, but, the heavier spring takes the weight during lateral or longitudinal weight transfer. But here is what I am saying. Front springs being too soft = high front roll tendency. In this case to simply soften the LR and stiffen the RR would make the problem worse because it reduces the rear roll tendency. This would make his middle and exit more loose or less side and forward bite. If his front springs are too soft in relation to the rear he will have problems hooking up. It doesn't matter if you're on the bars or not, you still need weight to come off of the front.

[Mr.Kennedy777]

It's common knowledge in physics that a softer spring compresses and extends more while loading and unloading less than a stiff spring. But it is also common knowledge that a stiffer spring on one corner of the side of weight transfer will bear more weight during the transfer process. So you have a trade off. This is why stacked springs and bump devices are this huge trend right now because they in a sense offer the best of both worlds. Stacked LR springs have a high compression side spring and a low rebound side spring, so when you get up on the bars you reap the benefit of the extra pre load of a soft spring but the weight "acceptance" of a stiffer spring on the compression side. Racing is all about compromising because you never can get 100% ideal or perfect set up. You'll always be losing traction, from weight transfer left to right, front to back, back to front. But you can't just say softer spring LR always offers more forward bite. It depends on the setup. If you're way up on the bars, then yeah. But if you look at a lot of the top teams, a lot of them are actually getting way less aggressive with the bar angles, running a lot less rear steer, the introduction of bump style suspension setups, and running much lower and flatter than they used to. It depends on the setup man. There's never one right answer.

[Kromulous]

Swap them rear springs for $hits and giggles, its just 25lbs and i think it will even your car out.

[Mr.Kennedy777]

actually it's a 50 pound change. 25 on the LR and 25 on the RR. 25 pounds would be just softening the left rear.. Lol my recommendation would be to stiffen the RF a bit. Unless you're running some sort of bump device with the 300 spring.

[Matt49]

Again, I beg to differ. The top touring teams are getting the LR hiked up further than ever. Several reasons for that but I don't want to get too far off track here. And they are running LR spring rates softer than most people would DREAM of running.
For a car that is on the bars with a taught travel limiter, I can assure you that the LR spring is not accepting any load when the car accelerates off the corner. The "heavy spring gets the weight" theory should have been abandoned the day after the LR spring behind setup became hot. It should be re-thought as "the stiffer corner gets the weight", and people would stop talking about putting 250 LR on to make forward bite.
And outside of some woefully outdated Bob Bolles articles that for some reason keep getting re-published, I'd like for you to show me where a right-side mounted j-bar has been comparably fast on any dirt track in the last 10 years.

But anyway...I agree with CCHIEF and Krom. Put a 14 inch 200 in the LR and a 12 inch 225 in the RR, and I bet the OP finds the side bite and forward bite he is searching for.
Will a softer RF help with forward bite? Sure it will. But it will eliminate the benefits (of which there are many) to the additional RF travel allotted by the softer spring. Net result in most cases is a car that handles better but has slower lap times.

[7uptruckracer]

BINGO I haven't had time to post this for ya lol sounds like a new poster just regurgitating stuff outta out dated articles

Again, I beg to differ. The top touring teams are getting the LR hiked up further than ever. Several reasons for that but I don't want to get too far off track here. And they are running LR spring rates softer than most people would DREAM of running.
For a car that is on the bars with a taught travel limiter, I can assure you that the LR spring is not accepting any load when the car accelerates off the corner. The "heavy spring gets the weight" theory should have been abandoned the day after the LR spring behind setup became hot. It should be re-thought as "the stiffer corner gets the weight", and people would stop talking about putting 250 LR on to make forward bite.
And outside of some woefully outdated Bob Bolles articles that for some reason keep getting re-published, I'd like for you to show me where a right-side mounted j-bar has been comparably fast on any dirt track in the last 10 years.

But anyway...I agree with CCHIEF and Krom. Put a 14 inch 200 in the LR and a 12 inch 225 in the RR, and I bet the OP finds the side bite and forward bite he is searching for.
Will a softer RF help with forward bite? Sure it will. But it will eliminate the benefits (of which there are many) to the additional RF travel allotted by the softer spring. Net result in most cases is a car that handles better but has slower lap times.

[MasterSbilt_Racer]

BINGO I haven't had time to post this for ya lol sounds like a new poster just regurgitating stuff outta out dated articles

My buddy won some races in the South back in 2011 with a right side panhard bar. UDLMCS or NLMS type cars. Actually led the points for a while during the NLMS chase format.