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Old 09-03-2013, 03:26 PM   #1
dekan513
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suspension questions

do these cars do better with softer or harder settings in the rear. like vs factory . do u all usally go softer on the rear end or what. would like to know what these cars like before i start messing around.
drag racing . dont mind nothing else just straight line .
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Old 09-03-2013, 04:58 PM   #2
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Rebound control is a shock's resistance to extend. The amount of rebound control developed by a shock will affect how quickly the tire is unloaded during dynamic weight transfer and how quickly the suspension "rebounds" or returns to its original position, after the spring has been compressed.(more later)

Compression, or bump control, is a shock's resistance to compressing and is specified at a given piston speed. Compression control will determine generally, how quickly the tire is loaded during dynamic weight transfer and how the suspension will react whenever a bump is initially contacted.
http://www.afcoracing.com/tech_pages/shocks.shtml
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Old 09-03-2013, 07:37 PM   #3
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neither atm , kinda why im asking.
good info john. i not use to how cars work. but i raced motocross and did alot of suspension tuning and thats a awesome read.

but do these cars typically like stiffer settings in the rear or softer. like say my shock are stock. when i go to put new ones in that are adjustable will i want it to be stiffer then stock or softer in the rear. for drag racing. its hard for me to explain stuff lol. i one of these ppl that have to show u not tell u.

typically do u want soft rear and stiff front or what? thats what im wanting to know. cause this will be my first car ive tuned myself trying to find out what to do and what direction. im not by no means a car tuner but i want to learn . i want to do my own stuff cause i like being able to do my own stuff cause i know what i want.
just need a general direction.
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Old 09-03-2013, 09:01 PM   #4
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Very light front.

Very stiff rear.

At least I think for my car. On a 250# spring and the shock on the very stiffest settings the car would bottom out and bounce uncontrollable.


I know have a modified set up that allows the coil over to accept an 8", 2.5" ID, 400 lbs spring on a double adjustable shock. If this doesn't work I quit.
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Old 09-03-2013, 09:33 PM   #5
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No surprise, but stick cars are trickier to set up for the strip.

One thing we used to watch out for with stick cars was the nose dropping on the shifts and the car spinning as a result.

We just got the AFCO double adjustables on the Drag Radial car rebuilt and revalved for LS Fest this upcoming weekend.
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Old 09-03-2013, 10:07 PM   #6
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Stiffer is better but you also need to make sure the rebound is correct also as you really don't want the rear moving much more than an 1" as it should load the tire and stay on the tire.
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Old 09-04-2013, 12:27 PM   #7
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i think thats what my cars doing atm no matter what i try with moving weight around . grabs good in first and when i hit 2nd it spins bad. i think its unloading and droppin the front to much. sway bars out it picks up alot more in the front then it use to. but it also drops more too.
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Old 09-04-2013, 01:05 PM   #8
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i think this question is on topic, what does removing the front sway bar do?
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Old 09-04-2013, 01:27 PM   #9
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i think thats what my cars doing atm no matter what i try with moving weight around . grabs good in first and when i hit 2nd it spins bad. i think its unloading and droppin the front to much. sway bars out it picks up alot more in the front then it use to. but it also drops more too.
Have you noticed any positive effect on not running the sway bar? I thought about this my next time out, I get pretty good spin into 2nd gear even with my DRs as well!
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Old 09-04-2013, 01:44 PM   #10
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Have you noticed any positive effect on not running the sway bar? I thought about this my next time out, I get pretty good spin into 2nd gear even with my DRs as well!
We haven't been running a front sway bar on our shop car for the longest time now. We didn't do any back to back testing but we feel that taking the front sway bar off really lets the front suspension travel more freely.
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Old 09-04-2013, 01:48 PM   #11
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We haven't been running a front sway bar on our shop car for the longest time now. We didn't do any back to back testing but we feel that taking the front sway bar off really lets the front suspension travel more freely.
If thats the case I should give it a shot!
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Old 09-04-2013, 01:54 PM   #12
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If thats the case I should give it a shot!
It definitely doesn't hurt to atleast give it a try. I know I removed the front sway bar on my 99 Trans Am back in the day and I gained a good bit of time in the 60ft and overall ET.
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Old 09-04-2013, 02:32 PM   #13
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How much of a job is it to remove? My olds was a 10 min job!
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Old 09-04-2013, 05:29 PM   #14
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I was going to respond back sooner but work was quite busy today.

So if you are spinning on the 1-2 shift, could mean that the car is nosing over and losing weight transfer. Could also be that how you shift is upsetting the car, like if you powershift or you are overpowering the tires at that power level. We for example with the DR class car experiment with things like shifting the trans sooner and lower to avoid some things that the car does on some tracks.

But back to you, if the nose drops a lot, the back tires can spin in a stick car. That's why some manual trans setups would set up the drag shocks so the nose will stay up and not come down. Also run the rears a little softer than auto cars. It's a bit of trial and error but typically the auto cars will run the front looser and not worry as much about the nose coming back down on the shifts.
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