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Analyze this launch

Posted By: 66coronet

Analyze this launch - 04/24/18 03:44 AM

It’s a ladder bar car with afco double adjustable shocks. It’s an index car so it has weight in it to move to the index. This is with 180lbs to slow to 10.00
It is staying in the beams too long in my opinion. It looks like the first move is squatting.

Posted By: Cab_Burge

Re: Analyze this launch - 04/24/18 06:43 AM

You need a 90 degree side view to be able to see the car work better in my opinion.
It looks like to me that the front is rising at the same time as the car is pitch rotating, which makes the rear look like it is squatting as it is not rising as fast as the front is. Most ladder bar cars rise in the back under acceleration work
Have another look at it up closer from the side up twocents
BTW, what is the 60 ft. times on that run?
Posted By: dvw

Re: Analyze this launch - 04/24/18 11:29 AM

Hard to see from the distance but the rear does rise slightly, it pitch rotates. Personally from what I can see, it looks pretty decent.
Doug
Posted By: 66coronet

Re: Analyze this launch - 04/24/18 02:15 PM

My daughter is the one filming. She is 15. thats as close as they will let her get. The car works well. In the car it feels like it dips the rebounds out and up. Thats what got me wondering what it looked like.

1.377 60 on that pass.
Posted By: 66coronet

Re: Analyze this launch - 04/24/18 03:09 PM

I think i see my problem. Its hard to see in that video because the quality changed when i uploaded it. The first two moves the car makes are the rear end driving downward. This is a tire pressure deal. I may be better served with a radial slick running the weight. Thats with 15lbs of air. Its the tire squatting or wrapping up that i am feeling as the rebound up and out.
Posted By: Cab_Burge

Re: Analyze this launch - 04/24/18 05:51 PM

Pump the pressure up on the tires a 1/2 lb. at a time until they spin up Then lower them 1/4 to 1/3 lb. up
I use to run 18.0 Lbs. in my stocker 9x30 bias ply tires a long time ago, it got the best 60 ft. times there work
Todays shocks, tires and suspension are way better today, your 60 ft. times are good bow up
Test, test and test some more until it flys grin
Posted By: Al_Alguire

Re: Analyze this launch - 04/24/18 06:11 PM

If you think it is hitting to hard start with tightening the extension on the shock, make it tighter. I assume this is a ladder bar, caltrac or 4 link car given the tire size. If that is the case it is simple physics really. The very first move with all those suspension types is to drive the housing/tire into the ground, that is controlled buy the shock.

Cant tell a lot on the video for sure. Looks ok for what can be seen. But hard to say definitively.
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