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Author Topic:   spring/shock travel
ukandesperate
Dirt Full Roller

Total posts: 45
posted May 23, 2005 06:04 AM  
Hi hope this is an easy one for you guys to solve.... how much does your spring compress when the weight is sat on it and how much more travel do you use?
were running coilover shocks clamped infront 3link and suffering with shocks bottoming out,having to run too heavy a spring to help the problem,seems like the shocks we use just dont have enough travel,not including bump stops there is about 8inch rod travel,should this be enough?

Iowamod20
Dirt Full Roller

Total posts: 73
posted May 23, 2005 06:40 AM  
Which direction are you bottoming out, compression or rebound?

In general you want your shocks to be set with half of the shaft showing at static ride height. If you know of a corner that is more apt to compress more, rebound more, etc. you can cheat the shaft to have more travel in that direction.

If your shocks are set wrong now, you need to move mounts.

tilley88
Dirt Forum Champ
Total posts: 879
posted May 23, 2005 07:03 AM  
My rear springs are 13" free height, 175# left, 150# right. At ride height they measure 10.5" LR, 9.25" RR. They're mounted on coil-over eliminators. I'm getting 2-2.5" travel on the RF, 4" on the RR. The car is rolling over so good now, I'm folding the right side door panel under.

ukandesperate
Dirt Full Roller

Total posts: 45
posted May 23, 2005 11:17 AM  
at the minute are shocks can be set with half the shaft showing but it bottoms out ie on compression. so weve been raising the spring adjuster to gain drop but lose extension,problem being we then top out when the car lifts losing bite?! We toyed with the idea of tilting the coilover to a 45 degree angle to double travel but are worried this might upset handling,any views on this?

tilley88
Dirt Forum Champ
Total posts: 879
posted May 23, 2005 01:05 PM  
My rear shocks and sliders are angled in at a 17* angle. I would'nt go over 20*. I have 3.5" of shaft showing on the LR, 4.5" on the RR. The sliders are mounted on front of the axles, shocks on the rear. I use Bilstein shocks, which have a little more overall length than most others. Where's your ride height? Do you race on a rough track?

Panky AMCA 21
Dirt Roller

Total posts: 11
posted May 23, 2005 03:11 PM  
[We toyed with the idea of tilting the coilover to a 45 degree angle to double travel but are worried this might upset handling,any views on this?[/B][/QUOTE]


Just remember that by tilting your shocks on more of an angle, effectivly you are softening the rate of the shock as it will not work as effectivly as it will mounted upright, like tilley88 said don't go over about 20 deg, or you may actually make your problem worse.you may havee to run a stiffer spring?

[This message has been edited by Panky AMCA 21 (edited May 23, 2005).]

ukandesperate
Dirt Full Roller

Total posts: 45
posted May 23, 2005 03:59 PM  
Yes the tracks can be really rough over here in the Uk,our ride heights are taller than yours to accomodate this but seems like our shocks are about the same length,ride heights are around 9 inch.the shocks we use are adjustable damping so could stiffen to allow for a steeper angle,maybe separate the spring from the damper,seems like you guys prefer that to coilovers,why is that?
Thanks for the info so far its good to hear some fresh ideas

tilley88
Dirt Forum Champ
Total posts: 879
posted May 23, 2005 06:36 PM  
Well, it's not that we like the idea of separate shocks and springs, but until this year we had to because of rules. With those high of ride heights, it seems as tho you would have better luck asking the Baha guys(lol).

tilley88
Dirt Forum Champ
Total posts: 879
posted May 24, 2005 06:58 AM  
Sounds like you need to move some mounts to accommodate your shock/spring combo. BTW, do you race around the track clockwise in the UK? Any pics?

ukandesperate
Dirt Full Roller

Total posts: 45
posted May 24, 2005 01:32 PM  
Hi again,yes we run backwards to you but hey you drive on the wrong side anyway lol.. So anyway,measured the shocks today,only a measly 6 inch of travel! were going to get longer ones made this week if we can,hopefully with 9 inch travel. this will mean raising the mounts on the car,how wil this affect weight transfer? im thinking it should help transfer weight to the rear under power?

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