I tried Simon's setup on this weekend's club meeting on our dirt track (I placed the Italy setup on). The car felt better than setup I came up with myself but still not as stable as I'd like it to.

There are a few things I like about it:
1) Turn in steering
2) No bottoming out after jumps

I'm having difficulties with:
1) Getting the power to the surface (it feels a bit like a 2WD when going on the throttle). The car is not easy to drift on higher speeds.
2) Hooking rear end which makes the car feel unpredictable because of which I felt I could not attack turns. This sometimes happens when approaching the apex.

To improve thing I tried different tyres which made it a bit better. Secondly I tried more toe-in at the rear which made it feel a lot better on throttle but I'm still not there yet. Last change I made were diferent front tyres (Blockheads) which gave me an awful lot of understeering with my D4 but the CAT is still oversteered with these as well.

Besides these things (which I think can be solved) the car feels great and with a lot of potential.

Thanks in advance,
Michael

Hi all-
been lurking awhile, just reading and working on my setup, but this post got my attention. I've been through three rear hub carriers in the last three packs. Granted I cartwheeled a few times, but nothing else has broken on the car. It does seem the rear hub carriers are a bit fragile relative to the rest of the car. I'd buy some alu ones if there were any.

if you've been having troubles have a look through the kyosho thread because i read a bit on there about boiling plastic parts to destress the plastic making it a bit tougher.

Any good setup for bumpy track and loose surface (hard clay with layer of dust over it)? Bit rutted after practices of 1:8ths.
Carpets on jumps and also in some corners.

Oswetsry Nationalm Potental starting set-up
 

Hi guys - without trawling through all the set-ups posted here I am posting my set-up for dry grass.

I raced at Oswestry BCL today and qualified 4th and finished 6th (2nd in the last 2nd leg and 9th in the 1st leg after breaking from 3rd on the last lap!)

The track was 100% grass with the exception of a large table-top in front of the rostrum. The track itself was quite large and we were completing 14 laps at around 21-22 second laps.

It is also the same grass that will be used for the National later on this season


Front suspension -
Track Washers - 1mm front and back
Roll Bar - No
Shock Position Mount - Middle
Shock Position Wishbone - Middle
Front Rake - 10 Degrees
Front Link Bracket - 44mm
Ditto Washers - 0mm
Washers on Hub - 0

Rear suspension -
Wheel Base - Short
Toe In - 3mm Rear, 1mm front = 2.6 degrees
Anti Squat Washers - 2mm Rear, 1mm Front = 1.3 degrees
Rear Link Bracket - 37.5mm
Washers - 4mm
Hub Position - Outer
Shock Position Mount - Middle
Shock Position Wishbone - Inside
Roll Bar - No

Shocks
Front -
30wt on 2 Holes
Schumacher Blue Springs (old ones)
Diaphragm - Centre cut out and removed
Ride Height – Wishbones level

Rear -
25wt on 2 Holes
Schumacher Grey Springs (old ones)
Diaphragm - Centre cut out and removed
Ride Height – Wishbones level

Transmission-
Rear Diff Height - Low
Front Diff Height - Low
Layshaft Pulley - Pin Through
Front Drive – One way
Gearing – 23 x 83 on Speed Passion 5.5
Internal Ratio – 33/23 Tooth Pulleys (kit standard)


We initially started out with 25wt oil in the front but went up 5wt after Round 1 to try to give the car a bit more stability as the track was drying.

We also started off with the Standard Diff and changed to a one-way after Round 3 and to be fair never looked back.


Please note the changes noted below from original e-mail

Si/Jonesy

What length ackerman link are you running in the set ups posted here? Ctr to Ctr?

Thanks

Paul

i found 8mm to work best measured in between the plastic joints increasing it screwed the steering up :thumbsup:

Hi Paul,

It was Ctr to Ctr I was running and as Tinners posted above, 8mm Ackermann Link

Jonesy

I run that too :thumbsup:

Please click one of the Quick Reply icons in the posts above to activate Quick Reply.

Jonesy, did you get my other question?

has anybody got a cat sx setup for epr

Yup - might have;) But Stu - that'll not work on your D4:p:p

Hi, this is Grants set up from the 4wd regional.
Any questions just ask hope we can help.


Mike.


Front -

Track Washers - 1mm front and back
Roll Bar - No
Shock Position Mount - Middle
Shock Position Wishbone - Middle
Front Rake - 10 Degrees
Washers - 0mm
Front Link Bracket -38.5mm
Washers on Hub -cut 0

Rear -
Wheel Base - Short
Toe In - 3mm Rear, .5mm front = 3.25 degrees
Anti Squat Washers - 1mm Rear, 1mm Front =0 degrees
Rear Link Bracket - 37.5mm
Washers - 4mm
Shock Position Mount - Middle
Shock Position Wishbone - Inside
Hub Position - Middle
Roll Bar - No

Shocks

Front -
40wtt on 3 Holes Drilled 55
Schumacher old Grey Springs
Diaphragm - Centre cut out and removed
Ride Height - Wishbones level

Rear -
30wt on 3 Holes Drilled 54
Schumacher old Red Springs
Diaphragm - Centre cut out and removed
Ride Height - Wishbones level

Transmission-
Rear Diff Height - Low
Front Diff Height - Low
Layshaft Pulley – Pin out
Front Drive - Diff
Gearing - 83 x 23 on Speed Passion 5.5
Internal Ratio - 36 Tooth Pulley kit

Tyres
Yellow Mini spike all round ,Mr ‘O’ blue inserts.

High grip and warm

7.5 caster blocks, ¾ length ball ends all round (shocks)

maybe not but the three cats and the x5 that beat me at the last reginal must be doing somthing im not.:thumbsup::thumbsup::thumbsup::thumbsup:

Does this mean you now have a Cat Stu???????????????

Quick question, on the shocks it says it's go 3 hole pistons drilled to 55 and 54, but what was the other hole? I'm assuming 555 and 544?

no sorry dave just curiouse:thumbsup:

hi,
setup above is for witch track (grass, astro,...) and wet or dry?
thanks

All 3 holes are drilled, so the front pistions drilled out to losi 55 rear 54.
The track was EPR mostly astro with some tarmac, warm day high grip.

Phil Booth Signature Setup.

This is the default as shipped setup of the CAT SX Phil Booth Signature.

http://img14.imageshack.us/img14/137...oothsetup1.jpg

Colin

Cat sx astro-setup
 

Hi.
Just Bought a Cat SX (nice ride:D), need setup for tight, bumpy, high grip astroturf.
will run 6,5turn+lipo, yellow mini-spike.

Ps: all tips/triks for the cat will i be thanksfull for...


2"nd round in the norwegian national championship next weekend:woot:

Hi guys,

Just a quick report to let you know that the set-up I posted above worked a treat at the National yesterday at Oswestry and as I qualified 2nd in the 'B' final and finished 4th. I was the 4th highest place CAT at the event behind Si Moss, Grant Williams and Nathan Waters and also my best ever 4wd National Result in 15 years of trying

You can't do much wrong with the above as a starter for grass :thumbsup:

Jonesy

This is my latest Southport setup. Felt awsome on Sunday! :D

http://i43.tinypic.com/2v2fkvd.jpg

Any suggestions for a bumpy astro turf track? - Titchfield.

Just got the Cat SX PB this weekend and want to set things up a bit. (running the Losi XXCR until the shell has been painted)

Hi if any one is interested this is Grants set-up from RHR this weekend

Blyth RHR National finished 3rd

Front -

Track Washers - 1mm front and back
Roll Bar - No
Shock Position Mount - Middle
Shock Position Wishbone - Middle
Front Rake - 10 Degrees
Washers - 0mm
Front Link Bracket -38.5mm
Washers on Hub - 0

Rear -
Wheel Base - Short
Toe In - 3mm Rear, .5mm front = 3.25 degrees
Anti Squat Washers - 1mm Rear, .05mm Front =.065 degrees
Rear Link Bracket - 37.5mm
Washers - 3mm
Shock Position Mount - Middle
Shock Position Wishbone - Inside
Hub Position - Middle
Roll Bar - No

Shocks

Front -
40wtt on 3 Holes Drilled 55
Schumacher old Grey Springs
Diaphragm - Centre cut out and removed
Ride Height – Drive shaft level
¾ length ball end total length of shock 85mm

Rear -
35wt on 3 Holes Drilled 54
Schumacher old Red Springs
Diaphragm - Centre cut out and removed
Ride Height - Wishbones level
Full length ball end total length of shock 99mm

Transmission-
Rear Diff Height - Low
Front Diff Height - Low
Layshaft Pulley – Pin out
Front Drive - Diff
Gearing - 81 x 23 on Speed Passion 5.5
Internal Ratio - 36 Tooth Pulley

Tyres
Yellow Mini spike all round ,Mr ‘O’ blue inserts.

7.5 caster blocks
108 grams added
Stiff chassis

Any Questions just ask

Mike

This is for a bumpy astro turf track isn't it?

Also what do the old springs match up to with respect to the modern springs?

Full length ball end total length of shock 99cm

I hope your rear shock is 99mm :) or they are veeery long

Sorry my Bad :cry:

RHR I would not say it’s bumpy it has great jumps and contours but not bumpy.

As for springs I don’t think any of the new springs are the same. The new springs have a lot more coils. The old grey fronts and red rears are from one of the earlier cats which one? I don’t know Mr Moss found these springs at the start of testing before the car was released and they work very well on the new Cat SX .Schumacher still have them in stock.

Are the spring sets people call "old" from Cat SE / 98 / 3000 part no: U1352 and U1353 ?

No that is not the part number,sorry don't know what it is, when i have ordered them at Schumacher i have just ask for old grey fronts and old red rears.

I have been looking at the same "old" springs and I have some left from my past cars, but not grey and reds, but I mean it must be short and medium springs there is needed for the CAT SX. I will say old long spring is too long to fit and medium is too long to fit on front shocks.

Could someone help with right part numbers?

Don't have part numbers to hand - but it is short on front and medium on the rear.

Found them here...

http://www.racing-cars.com/images/Te...am/cat3exp.pdf

front short spring set U1351W
Grey short spring U1390A

Medium spring set U1352V
Red medium spring U1865P

So what national track is a bumpy / rutty astro turf track as I'm trying to regaain a set-up for the car.

Has anyone got a set-up for polished wooden floor? Doesn't sound too exciting I know, but I'd like a starting point for a club night and to see if I can kick ass amongst the touring cars. :thumbsup:

I've also read through the majority of the threads and can see no real explaination of what cutting the centres out of the diaphrams on the shocks actually does. Does it increase pack? I know it's a damn sight more difficult to build with no air trapped.. :confused:

try this

setup wont up load pm me your email ill send it direct

stu

ok with the o rings in what tends to happen if you come of a large jump the diphrams colaapse and the shocks dont work very well after with the diphrame cut out it genraly feels more consistance it sounds like you are from tc back ground me too in a tc the diphrams are they way forward as the small omount of give you get in the rubber soaks up the small high frequnce bumps which you can tune with the foam compensaters with the off road car the tyres do that job.

i hope this helps.

stu rand

I try the rallycross too, and unless i'm missing something, I haven't seen or heard of them being cut for that? i guess the thing to do is try both cut and un-cut to see for myself. Are you saying that you think the air over the diaphram is expelled/leaked on landing and then not recovered?