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Xray T4 '13

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11-14-2012 | 08:27 AM

#1516

MikeXray

Tech Champion

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Joined: Oct 2006

Posts: 5,754

From: New York

Quote:

Originally Posted by Mera'din

Thank for the setup advice!

Here is my big concern. The rear diff. I have always run the xray ball diff which was way too easy to adjust. Now, with a gear diff it seems like more of a hassle to switch. I have NO idea what oil to run as our track is small, fast, and technical. I need to power out of the turns quickly and carry power deep into the turn if I want to stay with the leaders.

Traction is so subjective. What I find to be high grip others may say med. How do I tell if I have the rear diff set correctly? Just run the kit oil and be happy?

The carpet is an indoor carper, not an RC carpet.

Start with the kit oil, but from the sound of your track you may want to lighten up the oil. I find that tuning with camber is a lot easier to chase track conditions throughout the day.

11-14-2012 | 08:31 AM

#1517

samnelso

Tech Master

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Posts: 1,751

From: Fitchburg, MA

I'd just run the kit 700cst. However, there are other setup things I'd worry about before the diff oil. 700 is a good start as the diff action will be very light and smooth and will help keep the car planted under power. Thicker oils, 2000cst or so, may start giving you a little onpower oversteer. Think of a locker/spool in the rear axle of a real car, when it's locked it's easy to do cookies, when it's not it will tend to push. Obviously, there's a grey area for everything though.

Last edited by samnelso; 11-14-2012 at 08:44 AM.

11-14-2012 | 09:22 AM

#1518

jlfx car audio

Tech Elite

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Posts: 3,942

From: jackson,tn

With not 700cst I spun rear inside tire badly when excelerating out of tight corners . Went to 1500cst and cut 80% of it out and didn't notice any bad affects

11-14-2012 | 09:56 AM

#1519

Meradin

Tech Master

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Dumb question, are diff oils and shock oils the same? Can I use a 40 weight shock oil that has a cst listing of 1000?

11-14-2012 | 10:24 AM

#1520

niemand

Tech Adept

Joined: May 2009

Posts: 166

From: Germany

Quote:

Originally Posted by Mera'din

Dumb question, are diff oils and shock oils the same? Can I use a 40 weight shock oil that has a cst listing of 1000?

Well theoretically you can; both diff and damper oil are silcone oils and only differ in weight.
But I don`t think that 40 weight oil actually has a rating of 1000cst.
However, every brand of oil is somewhat different in weight even if the numbers on the bottle are the same.
Regards from Germany

11-14-2012 | 10:35 AM

#1521

CarbonJoe

Regional Moderator

Joined: Jul 2006

Posts: 2,664

Quote:

Originally Posted by Mera'din

Dumb question, are diff oils and shock oils the same? Can I use a 40 weight shock oil that has a cst listing of 1000?

http://www.rctech.net/forum/attachme...-shock_oil.pdf

11-14-2012 | 02:25 PM

#1522

RCTWENTY8

Tech Adept

Joined: Nov 2011

Posts: 222

From: Marietta GA

Quote:

Originally Posted by xray2050

Who in the USA carries that yeah racing fan?
Thanks

All RC parts check with Nexus Racing..see below!

11-14-2012 | 04:26 PM

#1523

locked

Tech Master

iTrader: (1)

Joined: Mar 2010

Posts: 1,758

From: Toronto

Quote:

Originally Posted by RCTWENTY8

All RC parts check with Nexus Racing..see below!

lol. You know, I love nexusracing. I really do, but you guys certainly don't have everything. Yeah Racing tornado fans, the specific product that Pete is looking for, appears to be one of those items.