ZX5 setup questions

[dibble34]

Hi All

Not sure there is simple answer to this but here goes....

I race outdoors on a pretty bumpy astroturf track .I have a standard ZX5, and am pretty happy with the setup, apart from the following.

I suffer from understear on initial turn in and off power, especially if the track is damp It feels like i have to wait too long when cornering before i can apply power. If i put really grippy tyres on it just spins round as i then have too much grip coming out of corners. Not sure i really know what i am talking about but if feel like i aM lacking mechanical front end grip when off power. I have 30 oil front and back, yellow springs at the back and orange at the front.

Any suggestions?

Thanks in advance,

Dave

[Neil Skull]

Hi Dave,

Are you running front diff or one way? or maybe center one way?

[dibble34]

Hi Neil, normal 4wd if that makes sense, same setup front and rear.

[SimonW]

Run the centre shaft 1-way with a tight front diff, that should cure it.

[Neil Skull]

As Simon says

[dibble34]

Thanks Guys, i am not sure i have the centre shaft one way. Could you give me anymore info on it/ Would i then just run the normal diff in the front? Sorry this is all new to me

[dibble34]

Originally Posted by dibble34

Thanks Guys, i am not sure i have the centre shaft one way. Could you give me anymore info on it/ Would i then just run the normal diff in the front? Sorry this is all new to me

It's ok i think i have cracked it

[c0sie]

Anyone have a decent indoor carpet setup that I can use on the wifes RTR?

Would like to give her a fighting chance to whoop my arse on the track if I can

[Nellybobs]

As per cOsie above but for an SP...iv been tryin for a few weeks now but just cant get it right...

i run at Macctrack, its a tight twisty small track so speed is not really an issue...any ideas

Cheers...

Paul..

[RogerM]

Nelly, I'll try and give you an SP set-up later for carpet.

[Nellybobs]

At the moment im running as follows:

FRONT
Springs.............Silver (kit)
Oil....................30w
Shock pos..........middle top, middle arm
Castor blocks.....10 degree
Camber link........inner pos. on both ends
Camber.............1 degree negative
Toe..................1 degree out
Arms................. just below level

REAR
Springs.............Silver (kit)
Oil....................25w
Shock pos..........middle top, inner arm
Camber link........inner pos. at both ends
Sus holder.........A25

19T reedy brushed motor
Schumacher mini pins all round with blue inserts (slightly worn)

The problem i have is both understeer and oversteer!!....
let me explain...using this setup i get poor high speed turn in and poor turn in on full lock at medium speed, i then changed the oil in the rear to 35w and put the shock mounts to outer, top and bottom! this now gives me oversteer at the end of the straight and it seems to 'hook' at tight corners.. I have tried a lot of different combinations but this is about the best iv found

Now i am no great driver but it is hard to develop your skill when the car is not setup right, Iv had my Lazer from December and think its a crackin car! half the joy of racing it for me is learning the setup....i think i just need a little help...

Thanks Roger...

Paul..

[SimonW]

Try running your rear/lower shock position on the out side with blue 68# springs, that should make it more stable and stop the hooking in and give you more exit steering too.

HTH SimonW

[Col]

Originally Posted by Nellybobs

At the moment im running as follows:

FRONT
Springs.............Silver (kit) Silver
Oil....................30w
Shock pos..........middle top, middle arm schu 35w
Castor blocks.....10 degree 10 degree
Camber link........inner pos. on both ends outer (closest to wheel) on inside, inner (closest to car) on outside
Camber.............1 degree negative 1 degree
Toe..................1 degree out 0
Arms................. just below level level with cells in

REAR
Springs.............Silver (kit) silver
Oil....................25w schu 35w
Shock pos..........middle top, inner arm middle top, inner arm
Camber link........inner pos. at both ends middle on car, inner on hubs
Sus holder.........A25 A25

Schumacher mini pins all round with blue inserts (slightly worn)

I also run with TP4900 lipo with a foam ( from a B4) at the front of the lipo to move the lipo back. The car is a little twitchy and still tends to try to throw the rear out on high grip high speed, but other than that it's fairly planted

[Fabs]

I know we're running a different car to you but Woody and I have found that cutting the rear wing's gurney right down helps a lot with high speed steering.

[RogerM]

All this from memory as the car isn't here to look at but here goes ....

Originally Posted by Nellybobs

At the moment im running as follows:

FRONT
Springs.............Silver (kit) #75 lime green
Oil....................30w 35wt AE (maybe try 40wt)
Shock pos..........middle top, middle arm outer on arm
Castor blocks.....10 degree
Camber link........inner pos. on both ends inner - king pin ball (from original ZX5), stud 0mm washers both ends ... if you can't do that then outer holeon hub, 3mm under outer ballstud
Camber.............1 degree negative -1.5deg
Toe..................1 degree out 0deg (toe out will make the car twitchy)
Arms................. just below level

REAR
Springs.............Silver (kit) #75 lime green
Oil....................25w 30wt AE (maybe try 35wt)
Shock pos..........middle top, inner arm mid top arm outer on arm
Camber link........inner pos. at both ends outer both ends (3mm under outer ball stud)
Sus holder.........A25
short wheel base
Rear roll bar 1.2mm (kit)
ride height so rear slightly higher than front at rest

NOTE:- SET-UP FOR NiMhs AS I'VE NOT USED LIPOs

Also might be worth trying outer rows off the tires as this will allow the car to slide more rather than digging in and rolling.

19T reedy brushed motor
Schumacher mini pins all round with blue inserts (slightly worn)

The problem i have is both understeer and oversteer!!....
let me explain...using this setup i get poor high speed turn in and poor turn in on full lock at medium speed, i then changed the oil in the rear to 35w and put the shock mounts to outer, top and bottom! this now gives me oversteer at the end of the straight and it seems to 'hook' at tight corners.. I have tried a lot of different combinations but this is about the best iv found

Now i am no great driver but it is hard to develop your skill when the car is not setup right, Iv had my Lazer from December and think its a crackin car! half the joy of racing it for me is learning the setup....i think i just need a little help...

Thanks Roger...

Paul..

[Nellybobs]

Thanks a lot guys, ill give both setups a blast later in the week...ill post back my findings when i can....

Cheers...

Paul...

[dibble34]

Hey alll

Been tinkering with my standard ZX5 and thanks to all the help on this forum i pretty much have it sorted. One final question and i may just be being picky! From a stand still under heavy acceleration it pulls right. If i pull away gently it is fine and straight or if i am moving at a reasonable pace and floor it, it is fine too. Just the initial race start kind if setup it pulls right. Any ideas?

Thanks in advance

Dave O

[jono83]

did you notice this on carpet?

[dibble34]

No on tarmac, i usually race on astroturf but haven't taken it there yet

[jono83]

ah ok then nevermnd then lol