SIMPLE TUNING - Track width & hexes

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In this 2nd video of the series, I talk about track width & hexes! I explain how widening or narrowing the car affects the handling. I also talk about the difference between changing the track width with the wheel hexes vs. with the suspension inserts!

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30 мар 2021

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Комментарии : 30

@Mcortz 3 года назад

Nice video as always. I'm excited for roll-center, anti-squat/dive !!

@dizzychizzy1 Год назад

Thumbs up bud, seriously I appreciate all your videos

@veganbear5212 2 года назад

I'm on board great stuff dude.

@Rainbro121 3 года назад

Thanks Alex 👍🏾🏁

@bobbymalta73 3 года назад

Thank you.

@Ryzo223 2 года назад

Love Ur vids

@reedytrippleseven4786 3 года назад

its a realy good video, is there any chance you can make a video with regards to running a 200mm track width and 200mm body vs the standard 190mm as it would be interesting to see how comparable the laptimes are. the question is weather the increased mechanical grip through cornering will offset the increased drag on straight line speed from the car body due to the larger cross section.

@hagberg 3 года назад

Thanks for the suggestion! I have no plans to make this kind of test in the near future however since the bodyshells used in the electric TC class are 190mm of width.

@andyhbo86 Год назад

Hi Alex, reference your comment at 8:49 about the car becoming more 'stuck' with narrow hexes - do you know why this is? Does this apply to a narrow car in general, or just with narrow hexes? I race FWD and after summer racing outdoors I found a narrow car to have better all round performance. This is narrow with hexes and suspension inserts. I then found that using the same learning indoors on high grip, my car would feel 'stuck' going to the apex and wouldn't rotate. I tried a random change and added 3mm of spacing at the hex front and rear and the car was transformed, really freed up. I'm now trying to decide if I should just go back to stock hex width or to also widen all the suspension inserts too. Any ideas? Thanks!

@hagberg Год назад

The handling which can be described as the car being "stuck" can occur when a too narrow car is run on a too high grip level. Hence why, the narrow hexes are the most beneficial for lower grip levels and with older/more used tires. A wider hex simply scrubs less speed through the corner, but also provides less side bite. I would say, use narrow hexes for low to medium grip tracks, and whenever you're on a higher bite surface, you're going to have more success with a wider hex, and trying to find the right setup with those.

@Skiddins 3 года назад

Could you explain what the difference in the handling that widening using the inserts has? I understand that other parts of the geometry change, as you explained, but you didn't mention the handling effect.

@hagberg 3 года назад

Certainly. Going wider with the front suspension inserts will make the car loose a bit of initial steering (because of the longer link and more laid down shock for example). But the front axle will have more overall grip, which is mainly apparent through the mid corner and corner exit. Going wider with the rear suspension inserts will stabilize the car, especially on power, and take away rotation, much like it will with the change of a wider hex as well, but the suspension insert change will be a bit more effective in doing this than to change only the hex.

@MyRCChannel-CJScott 2 года назад

Hi, I have a question. At 8:00 you are listing the three things that are changed by moving the arms outward... does this also impact the amount of influence the sway bar has? Wouldn't id slightly decrease the effect of the sway bar since the "fulcrum" is being moved outward? These are great videos, thank you!

@hagberg 2 года назад

It does have some effect on the swaybar, although, very minimal!

@MyRCChannel-CJScott 2 года назад

@@hagberg Thank you for responding so quickly. Also, I'm trying to find the video you did where you recommend using the progressive shock inserts, but only at one end of the car... I forgot which end you recommended. I'm currently finishing the build of my '21 T4 for USGT and am filming said build for my RU-vid channel. So, I want to get it right, both for myself and my viewers. I'm planning to link to mention your videos... I think I did in one of the earlier videos.... as well as link to them so my viewers can find your tuning videos.

@MyRCChannel-CJScott 2 года назад

@@hagberg If I could ask one more question, what is your opinion of the ULP Lowered Shock Towers?

@cosimomarotta9552 3 года назад

Hi Alex, thank you for the video, very well made as usual. But you forget to mention that a big part in changing the behavior of the car is not related to the width itself, but the change of the scrub radius when you change hexes, especially for the front where you have the axle that does two functions: steering and pulling the car. So, for this reason, using suspension inserts generate a different behavior because you do not change scrub radius. Following the other video...

@hagberg 3 года назад

Thanks for the explanation! You never stop to learn!

@cosimomarotta9552 3 года назад

@@hagberg thank you to you. I have learned a lot from you too.

@maxchung539 3 года назад

May I ask if I narrow the car q.5 mm front and rear with insert, is it good for low traction to get more steering and response? What is the down side?

@hagberg 3 года назад

I don't recommend narrowing the car. It will make it have more initial steering, but it will be more nervous to drive, and the overall corner speed will be reduced.

@siaschumi 2 года назад

Do you never play with widening or narrowing the car on all 4 tires? Wouldn't this be an easy way to adjust tire loads dependent on grip conditions (especially on asphalt where grip varies a lot)? The narrower the car, the more load on the outer tire. But the wider the car, the more balanced are the tire loads and the cornering speed should be higher. Do you have any experience with such an approach, i.e., narrowing/widening the whole car?

@hagberg 2 года назад

Yes we've often played with widening or narrowing the car on all 4 corners. It's a pretty massive change so, can be used when changing between tracks of very different grip levels for instance.

@siaschumi 2 года назад

@@hagberg Would you mind sharing some examples? It seems that you are using -0.5 in most conditions on the X4. Can you remember any situation where wider was faster on outdoor asphalt? Or do you only widen the whole car in order to avoid traction rolling? On the other hand, the old T4 had more adjustability of width with the inserts (down to 182mm front according to my tests). Many questions and I am a bit lost.

@hagberg 2 года назад

@@siaschumi Certainly. For example, in Apeldoorn at the ETS last year (large track with sweeping corners and good grip) I ended up using a standard front hex, and a +0.5mm rear hex. This helped free up the car (took some side bite out) but improved corner speed as a result. The car didn't need any more initial steering, but could benefit from being freed up, so the wider car worked great for those particular conditions.

@jairoluna9822 2 года назад

I am just wonder now x4 has narrow hexes I believe it has to be with longer arm the NEW modern car with longer arm are very stable so they to narrow hexes of the car in order to make traction. this modern car in low grip needs be a little narrow to make traction in this condition other waise the car wont be fast narrow car are very response also it afect the way the car roll. a narrow will roll more and will make more traction some it csn benefict for a very low traction condition

@hagberg 2 года назад

Hi mate. Can you please rephrase your question? You're asking about the track width of the X4 vs. the T4?

@jairoluna9822 2 года назад

@@hagberg hello alexander yes if you compare t4 with x4 they have diferent hexes setting what is the reason about this

@hagberg 2 года назад

@@jairoluna9822 The hexes are much narrower on the X4, because the hubs are moved further out on the suspension arm, so that the rotational point is in line with the upper and lower mounting point of the upper and lower arms.

@jairoluna9822 2 года назад

@@hagberg thank you very much to explain