Confused on Drag Racing 4-Link Suspension? FULL LESSON HERE!

Love if u could run my numbers and see where I’m at with my 4 link

Thanks Kevin. Some if/then explanations would really be helpful in creating a mental picture. Something where we can visualize the result. Like our car is squatting on the hit. So I move the upper arms up one hole in the front mount to get ĪC above the anti squat line.

I don't have squat... Great info!!

Kevin, great video. I was wondering if you had any info on obtaining anti squat with a trailing arm setup as opposed to a 4 link. Thanks so much.

I just found a new channel to check out. I'm a 4x4 guy, but we essentially have the same principles and the more knowledge we know the better we can build. I'll be binge watching!!!

Hello question I have strut front end so I can't get measurements from upper control arm bolt what do I do ??

The link for the AS calculator says that it will give a false reading if you do not use their products, is this something we need to take into account for? Thank you for the info, good breakdown.

Hey Kevin
It's me Jeff, I bought your very first rubber upper four links from your website baseline suspensions that were not adjustable you actually made them specifically for me, unfortunately they weren't adjustable like your other setup that you have with the two hymn joints for the Buick Grand National.

But I also have the other setup where it's solid.

Shortly after I purchased these you came out with the adjustable uppers with the rubber bushing in the front, I wish I would have waited cuz I would have more adjustability out of it.

But glad to see you're doing well

Jeff
87 Buick Grand National

awesome video mate. im in australia. Got a valiant charger and keen on a triangulated 4 link for straight and twisty purposes. but the length of the top bars with most of them look like they delete a lot of the deep analytical explanations you go into. is there any kind of middle ground for such an application ya reckon? cheers in advance. keep up the awesome vids

Great job. This is exactly what I need. Now that my car is stiffened with a cage and solid bushings I cannot get it to work.

Excellent video! In drawing the anti-squat line, it seems that only the height of the center of gravity was used (as you need its intersection with a vertical line through the center of the front wheel.) So why did I need to have the car weighed on scales and determine the front-back placement of the cg?

I love the emphasis on what will work and how to get it to work.
Thanks 🙏 for the lesson bruh 😎

So your shocks need to be mounted on the back of the rear end housing? I mean they need to extend at the hit?

👍🏼👍🏼❤️❤️👍🏼👍🏼😍😍

It’s pretty easy to realize if you run your lower bar up hill you’ll get anti squat if you run it down hill you’ll get squat on initial launch. It’s a fulcrum point, it don’t take all that center squat line calculation to figure that out.

I just got skooled! 🤯 Thanks for the lesson!!! 🙏🏻

Hello along time alignment guy in Kingston Ont Great help going to check my new ride Blown front eng dragster so I guess all new @ least if I scale I will get a 1st hit plan it should 60 in low 90s )

Never had a desire to make a racing suspension but loved learning the geometry involved. Awesome video

What if my willey is bigger than everybody else's? Does that make me the weiner? LOL

Great video. Thank you for sharing.

excellent presentation, thank you

Nice job

I’m trying to learn these things at the moment as going to start building a chassis soon. It’s helping, but also confusing 😂

Where does the "center of gravity" dot come into play? It looks like anti-squat line goes from rear slick tread to the cam height above front center line. Is the center of gravity dot ever used again? I run a ladder bar so should I try to use the front mounting hole that lies on the anti squat line?

This man is the most knowledgable chassis guy I've ever seen. Thanks to Kevin Wilson for sharing this with us!

Side to side weigh bias ( left/ right) should we ideally aim for a 50-50% (side to side) with driver in vehicle? How do i know how much weight should be on the rear left side to compensate for engine rotation ?

Should i do the maths to see how much weight it would take to crush the side wall of my tire. Then base my weight transfer to the rear/ shock compression accordingly? Should i base my max shock compression (in lbs) on the amount of weight it will take to crush the side wall?

i always heard knowledge was power ! ... but never thought someone would be kind enough to make a video about it ... great , great information - thank you for your experiences

I’ve been watching a lot of your videos and I believe I understand quite a bit of it. Im trying to plot the 4 link out on the website link you provided but I don’t think I measuring the “horizontal control arm length”. Do I measure center of bolt going through the heim to center of the other bolt. But it says “control arm length is not the actual length it’s the parrallel/projected length. Do I need to hold a level on the rear bolt and try and measure straight across instead of following the bar angle

Great explanation, looking forward to re-affirm info thanks

Absolutely great videos... But, I have a set of Intercomp 500 series scales. Their instuctions are very vague on measuring Vertical Center of Gravity. I am not sure which scales you use. But, could you explain how to correctly measure Verticle CG using their scales. That would e great! Or a possible explanation that is better than theres. Thanks,.

Will there be a "Finding the CG demonstration video"?

Don’t IC length matter to

DANG!!! I knew by the launch video you where talking about squat and slicks... Was just going on a glimmer of hope you'd talk about antisquat with radials and a stupid short wheelbase like 94" 😂🤘

Fantastic explanation. Appreciate it

Thanks Kev for taking the time on these videos.
One question though, weather you’re either above or below the neutral line how close do you want to get the IC to the point of COG?
Is it better to be closer to the diff or closer to the COG

Now I know everything watch out john force, thanks for your vid I learned a lot and doing my first ever 4 link set up on street car I know it's not a drag car but I do want it to hook and go. MIATA v8 swap

Wish you had a no bar drag bike version, Lol. But great info, I am just trying to translate it to bikes

I run ladders. My pinion angle and preload is on the bottom bar. Is the adjustment for preload the opposite of adjusting the upper bar?

what category do the pro bracket radials fit in?

Great videos…. Coming up with a 230% anti-squat line instant center length 28 inches … height 12 inches . have a factory 4 link 68 GTO running on slick . coil over front and back. Is that Anti-squat line way too high ?1200 hp on spray front heavy no prep car .

Alot of good info here also explain s it well don't forget after the hit things do changes.

Very helpful 👌

Any good videos with airbags and a good adjustable 4 link

Thank you for the awesome video. You wouldn't happen to know how to apply this knowledge to a motorcycle swingarm would you? The part I'm having trouble with is the upper chain run as it's kind of like the top bar but exerting force in the opposite direction

how do you know the CG height if your engine dont have camshafts (rotary engine)

Great video!

Thaank you

Wondering if you have any advice or recommendations about doing all these calculations with a type 1 Volkswagen? Rear engine transaxle IRS. No torsion bars with coil overs in the rear. Any advice is much appreciated 🤙🏽