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Author Topic:   z-link question
S_motors1
Dirt Newbie

Total posts: 4
posted May 17, 2004 09:04 PM  
what does moving the z-link up or down do to the handling of a modified.Rearend not locked, and we are not running a swingarm.

02racing
Dirt Full Roller

Total posts: 54
posted May 18, 2004 07:38 AM  
Adds or removes rollsteer Move the rear of the z-link down on either sides adds it up or level removes it.

dirtracr
Dirt Maniac

Total posts: 199
posted May 18, 2004 12:10 PM  
we set ours at about 5 degrees down in the back on rr....made car really lose entering corner....i was a little braindead on what it does too..

HarrisMod#30
Dirt Freak

Total posts: 353
posted May 18, 2004 07:55 PM  
Id like to know also, comon somebody has to know?

21racer
Dirt Full Roller

Total posts: 56
posted May 24, 2004 07:44 PM  
moving upper link up or down changes rear steer and birdcage indexing i removed springs and shocks from my car jacked rear suspension up and down and measured to see what each mounting hole did to rear steer and indexing hope this helps someone

zeroracing
Dirt Forum Champ
Total posts: 1875
posted May 24, 2004 08:10 PM  
i am guessing you mean angle? adding more downhill angle to the back of the rear bar in a z link adds more thrust angle and increases that sides drive.
so if you add more the rr then the car will be looser(because your driving off the rr more. and if you lower the lr then it will tighten up the car because you drive off the lr more. also remember that as the car rolls over the rr gains thrust angle becasue the bar becomes more downhill to the back.
and the lr looses thrust angle because it become level or uphill to back.
the lower links play smaller rolls in thrust angle.
hope this helps.
jason

Azrace
Dirt Full Roller

Total posts: 40
posted May 24, 2004 09:12 PM  
Hey Zero, What would happen if ran the RR rear z-link on a upward angle towards the rear of the car? Would this help the car drive off the LR on a dry slick?

Thanks

MOD75D
Dirt Freak

Total posts: 236
posted May 24, 2004 09:26 PM  
I was also wondering how it would affect corner entry. If you lower the LR bar will it also tighten the entry?

zeroracing
Dirt Forum Champ
Total posts: 1875
posted May 25, 2004 09:44 AM  
if you run it at a uphill angle to the back, then the car will have a neg thrust angle on the rr, and have very little bite on that side, it would tighten up the car but really cut down on overall bite.
you would be better off to add a little angle to the lr bars. and at worst go almost level if you have to with the right rear. then you would not loose all forward bite.
as far as entry. on entry depends on how you drive, but if your like alot of guys that let off super hard and grab brake super hard then i am going to say that the car will unload the lr really hard and then you will be tight in because your driving off the rr.
the best way is to roll out of the gas so the car does not unload the tires super hard then the more angle will not make a large difference in the entry, especially if you float your brakes on another bar like i do on my swing arm/z link set ups.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted May 25, 2004 09:48 AM  
by large difference i mean it may loosen up the car some, but you could probally adjust the brake bias, or mess with the 90/10 location or lf spring ot get it right.
it would probally on take a small change to get hte car back where you want it.
alot of how it will make the car handle on entry with the rear bars are how do you enter. i was having fun the other night, the fuel pump was making the motor not rev, so i was driving all the way in on the bars. it was pretty loose, but fun to run a car that is still hiked up full gas all the way in. not the fastest way around, but the motor was not reving so i was behind anyways.

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