XRAY - Model racing cars

They are both units of viscosity

CPS = centipoise viscosity units.
CST = centistoke viscosity units.

CPS = CST x density, but as the density of Silicone Oil is very close to 1 (around 0.97), the two values will be almost he same. (i.e. 1000 CST = 970 CPS)

It will be so close you won't be able to tell the difference. If you can, you should probably be racing F1, not RC cars.

Hey guys do you know if there is a chart of some kind that does conversions i.e 5000 xray oil is the same as 9000 mugen if so where will i find it thanks!

This was based on the old XRAY Oils.

Xray silicone oil with Rheometer
09-10-2005

Rating Cps
100 106
150 179
200 248
250 292
300 354
350 381
400 441
450 475
500 542
600 625
700 702
800 799
900 913
1.000 1020
Differential usage
2.000 2490
3.000 4270
5.000 9000
7.000 10500
10.000 13000
20.000 30000
30.000 39600
60.000 65000

Here you can find more information on old shock and diff oils.

My friend that writes for R/C Car Action gave this sheet to me. Hope it helps.

Shock Oil Comparison Chart
by Lito Reyes, from data compiled by Gene Hickerson

Associated Electrics
Wt CPS
10 108
15 ?
20 208
25 286
30 373
35 454
40 525
50 707
60 725
70 960
80 1040

Kyosho
Wt CPS
250 244
300 302
350 351
400 411
500 506

Losi
Wt CPS
15 110
17.5 158
20 243
22 243
25 294
27.5 345
30 381
32.5 397
35 459
37.5 477
40 546
45 657
50 886
60 844
70 970

Serpent
Wt CPS
20 107
25 207
30 370
35 626
40 1070
45 1449
50 2250

Trinity
Wt CPS
30 337
35 376
40 505
45 497
50 658
55 568
60 799
70 757
90 974

XRAY
Wt CPS
100 106
150 179
200 248
250 292
300 354
350 391
400 441
450 475
500 542
600 625
700 702
800 799
900 913
1000 1020
2000 2490
3000 4270
5000 9000
7000 10500
10000 13000
20000 30000
30000 39600
60000 65000

Please note that the XRAY oil chart is for the old xray oils