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Old 09-22-2009, 08:49 AM   #1216
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Originally Posted by trickd122 View Post
The setup posted by Michael was 40,000 F and 50,000 R, I am not seeing anyother setup posted except the one labeled 733 set-up Salven - Turkheim.
On this setup as Julius has already mentioned the reason for going to lighter oils. This car has a VERY WIDE sweet spot, that being said I have seeing user here in the US go as much as 500,000 front 100,000 rear or even 200,000 front 80,000 rear.

Here's the general principle of a Diff as how I UNDERSTAND IT (anyone feel free to correct me)

The wheel that has the most traction gets the most power. Typically on the front while cornering this would be the inside wheel. The heavier the oil the slower the wheel spin.

This also works from front to rear, same principle applies. If the rear is lighter than the front, the rear would likely get more power loaded to that axle. The harder the oil the Harder the acceleration. The lower the traction, the lighter the oil needed.
Correction on the diff. The inside wheel has the load on it so the outside wheel would get more power to it and spin. You're right that a heavier oil will help keep it from unloading as much.
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Old 09-22-2009, 09:02 AM   #1217
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Trick...... you have some Aussie heritage ? i see a Holden V8 Super car as your avatar
I LOVE those cars. HOLDEN is my team!!!! V8 is the way to go
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Old 09-22-2009, 09:06 AM   #1218
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Correction on the diff. The inside wheel has the load on it so the outside wheel would get more power to it and spin. You're right that a heavier oil will help keep it from unloading as much.
Thanks!
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Old 09-22-2009, 12:27 PM   #1219
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Originally Posted by trickd122 View Post
The setup posted by Michael was 40,000 F and 50,000 R, I am not seeing anyother setup posted except the one labeled 733 set-up Salven - Turkheim.
On this setup as Julius has already mentioned the reason for going to lighter oils. This car has a VERY WIDE sweet spot, that being said I have seeing user here in the US go as much as 500,000 front 100,000 rear or even 200,000 front 80,000 rear.

Here's the general principle of a Diff as how I UNDERSTAND IT (anyone feel free to correct me)

The wheel that has the most traction gets the most power. Typically on the front while cornering this would be the inside wheel. The heavier the oil the slower the wheel spin.

This also works from front to rear, same principle applies. If the rear is lighter than the front, the rear would likely get more power loaded to that axle. The harder the oil the Harder the acceleration. The lower the traction, the lighter the oil needed.
Actually the diffs work a bit differently. Easiest way is to visualise it from the engine onwards:

The engine powers the drivetrain. As 1/10 on road cars have no center diff power is provided to both diffs equally (assuming the tires are of correct diameter).

Now as the diff is powered the power is distrubuted to the left and right wheel. Unfortunately normal diffs will provide the wheel with the least resistance most power. This means the inner wheel in a corner. As the inner wheel is lightly loaded this will make th inside wheel spin, thus losing all drive if the diff was not filled with oil.

Now this is where the oil comes in. The thicker the oil the harder it is for both wheels to spin independantly. From no force without oil to almost like a solid axle when 500000 oil is used. The thicker the oil the more drive you'll get, but the oil also resists the wheels spinning at differnt speeds when the power is off, so the thicker the oil the harder it gets for the car to turn in. And also as the oil gets thicker the outside wheel gets fed more power, so it will not have as much sidebite left. So thicker oil can create oversteer in the rear and understeer in the front.

There is more to it still but this is the basic principle.
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Old 09-23-2009, 10:37 PM   #1220
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Originally Posted by Julius View Post
Actually the diffs work a bit differently. Easiest way is to visualise it from the engine onwards:

The engine powers the drivetrain. As 1/10 on road cars have no center diff power is provided to both diffs equally (assuming the tires are of correct diameter).

Now as the diff is powered the power is distrubuted to the left and right wheel. Unfortunately normal diffs will provide the wheel with the least resistance most power. This means the inner wheel in a corner. As the inner wheel is lightly loaded this will make th inside wheel spin, thus losing all drive if the diff was not filled with oil.

Now this is where the oil comes in. The thicker the oil the harder it is for both wheels to spin independantly. From no force without oil to almost like a solid axle when 500000 oil is used. The thicker the oil the more drive you'll get, but the oil also resists the wheels spinning at differnt speeds when the power is off, so the thicker the oil the harder it gets for the car to turn in. And also as the oil gets thicker the outside wheel gets fed more power, so it will not have as much sidebite left. So thicker oil can create oversteer in the rear and understeer in the front.

There is more to it still but this is the basic principle.
That is correct!
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Old 09-24-2009, 01:27 AM   #1221
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Hi,

Yep that was the case because the 733 kit oils were way thinner than Serpent "old" diff oils I have. http://www.serpent.com/product/160000 The 80k kit oil I put to the rear for the final felt like Serpent "old" 30k. BTW, the car was really super in the end on this small/tight and bumpy track.

I don't know if anybody experienced similar with the kit oils?

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Originally Posted by Pattojnr View Post
that was Gergely's end setup with those oils. he started with 80k front and 30k rear. then switched for the final to the 50k front and 80k rear.
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Old 09-24-2009, 03:44 AM   #1222
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F,150K R,100k
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Old 09-24-2009, 08:49 AM   #1223
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Originally Posted by Gergely View Post
Hi,

Yep that was the case because the 733 kit oils were way thinner than Serpent "old" diff oils I have. http://www.serpent.com/product/160000 The 80k kit oil I put to the rear for the final felt like Serpent "old" 30k. BTW, the car was really super in the end on this small/tight and bumpy track.

I don't know if anybody experienced similar with the kit oils?
Yeah I found that 80K in the 733 felt like 30K did in the old diffs. There's not much room in the 733 diff so it takes a thicker oil to get the same feel. I expected this from watching my friends with they're xrays running 60K in the rear. 120K in the front feels good as well as 200K where I am now.
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Old 09-24-2009, 09:03 AM   #1224
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now..., 733 got the smallest diff or TM RS09?
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Old 09-24-2009, 09:45 AM   #1225
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now..., 733 got the smallest diff or TM RS09?
i say the 733....
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Old 09-24-2009, 05:26 PM   #1226
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i say the 733....
+1
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Old 09-24-2009, 06:38 PM   #1227
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check this out. Didnt realise its the same oring as the other kits. Also i thought i would have to but the whole revision gear diff set if i had to replace the oring
http://serpent.com/product/804200
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Old 09-24-2009, 06:46 PM   #1228
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Guys to let u all know i ran my car the second time and was first place all the way. I tried 3 degrees camber in the back and tyre wear is better but on one side. Seems i may have to put one side at 2.5
i had used the WC gearing right of my 720 and been using it in my 733. Only today i realised the 733 gearing new in the box is 60s 17T and 54s 22T. And all this time im using 59s 17T and 56s 23T. It will be interesting to see how it will work when i put it in for this weekend. Also the 720 flywheel wont work because it is lower that the height of the car and sticks out the chassis. I have been using it like that for my second race day, but it still doesnt touch the ground
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Old 09-24-2009, 07:26 PM   #1229
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Originally Posted by spurgear View Post
check this out. Didnt realise its the same oring as the other kits. Also i thought i would have to but the whole revision gear diff set if i had to replace the oring
http://serpent.com/product/804200
Hi guys, just to share what I did to solve my leaking ver1 diff (not v2). Instead of using the stock 1mm oring, I used 1.5mm oring for a better seal and so far tested for a tank and no leaks!
I'll monitor how it'll hold up during this weekend club race.
Haven't really get used to the 733 and found the setup I want (ran about 3 tanks only) but who cares! Just race!! !
will try to find the right setup during the race...
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Last edited by NitroWD; 09-24-2009 at 07:40 PM.
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Old 09-24-2009, 07:50 PM   #1230
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Originally Posted by NitroWD View Post
now..., 733 got the smallest diff or TM RS09?
What size are diffs in the 733 ,the G4RS 09.s are 25mm frt 25mm rear.
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