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Picture of CURTIS REED
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I have a friend with an S-10 truck running mid 6.30s off the foot now that he just converted to alcohol. 1.80 gearset and new MT slicks w/8.50 lbs air. 2400lb truck and it is hitting the tire really hard now, bouncing back and spinning before hooking for good and then all is okay. He only has single adj. shocks on the rear and tightening makes it worse.

To me it looks like he needs to take some hit out of it. Would you move the front down to do that? I've never messed with ladder bars before but making it squat to me seems the right move. Thoughts?

Curtis

This message has been edited. Last edited by: CURTIS REED,



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Posts: 2994 | Location: KIEFER, OK. | Registered: August 17, 2007Reply With QuoteReport This Post
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move the front of ladder bar down and or lower rear ride height down
 
Posts: 25 | Location: Iowa | Registered: May 30, 2013Reply With QuoteReport This Post
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Double adjustable shocks would be a big help. Although we ran single on a s10 ladder bar going 6.30's to low 40's but that was off the transbrake.
And yes front of bar down.
 
Posts: 206 | Location: texas | Registered: November 13, 2008Reply With QuoteReport This Post
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Thanks guys. I agree he needs doubles but I'm not sure he will spend the money right now.



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My brother runs ladder bars on his car. He was having the same trouble over the weekend and went from 4600 on launch to 3200 and it seemed to calm it down.
 
Posts: 67 | Location: Pittsburgh | Registered: December 11, 2016Reply With QuoteReport This Post
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This is at 2200 rpm off the foot.

https://www.youtube.com/watch?v=mYIz5bznawY



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No front end travel, 2" maybe. How tight are the front shocks? Hard to make the back end work of the front end is fighting it.


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Posts: 755 | Location: Hanover, MD | Registered: June 20, 2016Reply With QuoteReport This Post



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quote:
Originally posted by Tom Reyer:
No front end travel, 2" maybe. How tight are the front shocks? Hard to make the back end work of the front end is fighting it.


Tom, like many chassis cars it probably doesn't have a lot of shock travel up front. The shocks I believe were set mid way on the extension settings. I am just beginning to help him with this truck so I will be doing some checking on things.



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quote:
Originally posted by CURTIS REED:
quote:
Originally posted by Tom Reyer:
No front end travel, 2" maybe. How tight are the front shocks? Hard to make the back end work of the front end is fighting it.


Tom, like many chassis cars it probably doesn't have a lot of shock travel up front. The shocks I believe were set mid way on the extension settings. I am just beginning to help him with this truck so I will be doing some checking on things.


I would think, with a long wheel base truck, it would need as much travel as possible to plant the tire. If it were 5.30s, not so much but 6.30's is gonna need a little help from the front end. If you can't get more travel, then try loosening the front extention all the way. At least thats were I would start with it.


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Posts: 755 | Location: Hanover, MD | Registered: June 20, 2016Reply With QuoteReport This Post
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Have you tried going up on air pressure, My Dad has a high 6 teen to mid 6.2x S-10 with almost no front travel 1" or less with ladder bars, can't say where what hole they are in as its in Florida now, but the tach replays great and will repeat 60's like mad with single adj on rear. He runs 11.5-12psi on a 29-10.5W.
 
Posts: 611 | Location: nw ohio | Registered: November 20, 2001Reply With QuoteReport This Post
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At the "hit" it's bouncing? What fundamentally could cause it to bounce at the hit? When fundamentally at the hit the tire is being planted. I could see it planting the tire too hard crushing the sidewall. That would be shaking the tire as a result of flattening it and getting too much traction as the shaft in the main body of the shock changes direction. I don't think what you're describing is shake though.I think what you're describing calls for the pickup point to be raised. Then tighten the single adjustable you have in play,up. Because the fundamental is, if you tighten damping and it doesn't respond positively, says the pickup point is too low.
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post
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quote:
Originally posted by HR3377:
Have you tried going up on air pressure, My Dad has a high 6 teen to mid 6.2x S-10 with almost no front travel 1" or less with ladder bars, can't say where what hole they are in as its in Florida now, but the tach replays great and will repeat 60's like mad with single adj on rear. He runs 11.5-12psi on a 29-10.5W.


That part I suggested but he is resistant because he said it makes him prone to redlight.

If we get to race Saturday I will post an update. He dropped the ladder bars, loosened the front shocks on extension and loosened the back shocks. We will see.



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quote:
Originally posted by Mike Rietow:
At the "hit" it's bouncing? What fundamentally could cause it to bounce at the hit? When fundamentally at the hit the tire is being planted. I could see it planting the tire too hard crushing the sidewall. That would be shaking the tire as a result of flattening it and getting too much traction as the shaft in the main body of the shock changes direction. I don't think what you're describing is shake though.I think what you're describing calls for the pickup point to be raised. Then tighten the single adjustable you have in play,up. Because the fundamental is, if you tighten damping and it doesn't respond positively, says the pickup point is too low.


Mike is right. The ladder bar needs to be raised. My ride is a ladder bar car that runs 5.60s. It was doing just what the vid shows.
What helped was raising the ladder bar one hole and working the front shocks first, then I worked the rear. Then I raised the rear tire pressure. Problem solved.

Tim McAmis has a four segment video on shocks. I must have watched that ten times. Watch them you'll learn a lot.


nomad
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Posts: 2546 | Location: Auburndale, Florida | Registered: October 19, 2004Reply With QuoteReport This Post
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Front end is wayyyy to tight to start with. I don't care what shock you put on the back until you loosen the front up its pissing in the wind


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Brian Martin
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Posts: 1405 | Location: Va.Beach .Va | Registered: August 03, 2005Reply With QuoteReport This Post



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Originally posted by RacerVX54:
Front end is wayyyy to tight to start with. I don't care what shock you put on the back until you loosen the front up its pissing in the wind


I agree. If we don’t get canceled tomorrow I will know more. He is supposed to loosen the front.



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Loosen it alot


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Brian Martin
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Posts: 1405 | Location: Va.Beach .Va | Registered: August 03, 2005Reply With QuoteReport This Post
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quote:
Originally posted by nomad:
quote:
Originally posted by Mike Rietow:
At the "hit" it's bouncing? What fundamentally could cause it to bounce at the hit? When fundamentally at the hit the tire is being planted. I could see it planting the tire too hard crushing the sidewall. That would be shaking the tire as a result of flattening it and getting too much traction as the shaft in the main body of the shock changes direction. I don't think what you're describing is shake though.I think what you're describing calls for the pickup point to be raised. Then tighten the single adjustable you have in play,up. Because the fundamental is, if you tighten damping and it doesn't respond positively, says the pickup point is too low.


Mike is right. The ladder bar needs to be raised. My ride is a ladder bar car that runs 5.60s. It was doing just what the vid shows.
What helped was raising the ladder bar one hole and working the front shocks first, then I worked the rear. Then I raised the rear tire pressure. Problem solved.

Tim McAmis has a four segment video on shocks. I must have watched that ten times. Watch them you'll learn a lot.


I missed the video until you mentioned it. But yeah if you pause and start and pause-start the video, it's like watching it in slow-mow. As I suspected according to the fundamentals, the bar is too low. The tire winds up before any weight transfer, you can see the front end is not tight when the tire unwinds and it hops, as evidence.

The hop can be a positive if you have a quality repeatable damper/shock for control, because it is free energy (tire unwinding getting up on the tire), if the hop occurs AFTER weight transfer (front end extending, as evidence). Here's an example of how that works 1.28 60ft N/A 3250pds 10x28 tire sbc. All steel street car with ladder bars, basically.

https://youtu.be/I8QWEaqeFRw

This message has been edited. Last edited by: Mike Rietow,
 
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https://www.youtube.com/watch?v=M3NkKt9bqUo&t=8s

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Brian Martin
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Posts: 1405 | Location: Va.Beach .Va | Registered: August 03, 2005Reply With QuoteReport This Post
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Transbrake leave is different than off the foot though. That car leaves very well.

They canceled us today. Mid 40s and 25-30mph cross winds.



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