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Old 08-13-2010, 08:28 AM   #691
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Just ordered the Gear Diff from RC Market - THANKS

-Troy
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Old 08-13-2010, 08:56 AM   #692
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Has any of you guys tried the rear narrow blocks? What do they do actually? Will it change the rear track width?
Yes and yes. I run these and .5 mm shims under them both, it has the rear of my car really planted......makes the car so much more stable.
I'm now churning out consistency numbers under .2 on a regular basis.
Admittedly I don't run in a fast class, it's my track's Clubman Class.
Basically a Venom branded 21.5 motor and speedy combo, with fixed esc timing and fixed motor timing too.
I currently hold the race record at our track with this chassis
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Old 08-13-2010, 09:38 AM   #693
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Just ordered the Gear Diff from RC Market - THANKS

-Troy
Yep, me too I just ordered 2 for my Sakuras along with some other stuff.
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Old 08-13-2010, 09:47 AM   #694
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Yes and yes. I run these and .5 mm shims under them both, it has the rear of my car really planted......makes the car so much more stable.
I'm now churning out consistency numbers under .2 on a regular basis.
Admittedly I don't run in a fast class, it's my track's Clubman Class.
Basically a Venom branded 21.5 motor and speedy combo, with fixed esc timing and fixed motor timing too.
I currently hold the race record at our track with this chassis
Ok, I just don't understand how come by narrowing the rear make it more grip, i thought widen it make it more planted. The 0.5 shims under the block will rise the roll center right? Wouldn't that make the rear a bit loose? Pls correct me if I m wrong.
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Old 08-13-2010, 11:01 AM   #695
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Thanks !
Free Decal for our customer now !

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Sakura Zero - New Touring Car!-3r-mhs010pk.jpg   Sakura Zero - New Touring Car!-3r-sak-65.jpg  

Last edited by RC MARKET; 08-14-2010 at 04:29 AM.
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Old 08-13-2010, 01:33 PM   #696
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Ok, I just don't understand how come by narrowing the rear make it more grip, i thought widen it make it more planted. The 0.5 shims under the block will rise the roll center right? Wouldn't that make the rear a bit loose? Pls correct me if I m wrong.
I'm wondering the same thing. Everything I learned and read says that wider makes the car more stable in a corner and more narrow has more grip in a straight line but not in a corner.
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Old 08-13-2010, 02:42 PM   #697
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Narrowing a car definitely makes the car grip more. I know adding spacers to the suspension holders (widening) on a car like a TC5 or Xray will take grip away. Going from outdoor to indoor, it was easy to widen the car at the bulkheads to reduce grip for carpet.

That being said, wider cars are supposed to have less lateral load transfer, so maybe this narrowing is working the tire harder. Widening the car will reduce traction roll too, so that seems in line with narrow cars having more "side bite".
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Old 08-13-2010, 02:56 PM   #698
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Narrowing a car definitely makes the car grip more. I know adding spacers to the suspension holders (widening) on a car like a TC5 or Xray will take grip away. Going from outdoor to indoor, it was easy to widen the car at the bulkheads to reduce grip for carpet.

That being said, wider cars are supposed to have less lateral load transfer, so maybe this narrowing is working the tire harder. Widening the car will reduce traction roll too, so that seems in line with narrow cars having more "side bite".
Ok I understand now, how about the roll center? If you raise it, will it take grip away from that end?
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Old 08-13-2010, 02:56 PM   #699
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I'm gonna have to do some research on that...I keep remembering back to the old "Wider is better" commercials for the Pontiac Grand Prix and the comparison between the F103 and F104 where the F103, the wider car, is a better handling car.
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Old 08-13-2010, 03:30 PM   #700
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Download and read the Xray setup guide, a narrow end has more grip, some guys have used narrower wheel hexes for a similar result....
It works for me ???
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Old 08-14-2010, 06:26 AM   #701
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Guys, you need to not only factor in the absolute width, but also the width in relation to the other end of the car, in kit form the Sakura is VERY wide in the ass, narrowing the blocks 2mm brings the ratio back in line with most other cars, giving it more grip in the rear.
If you were to go ANOTHER say 3mm narrower, then you may get a different effect, as then the front to rear balance would be way out again.

As with most setup changes, its all about balance, no use having a 30lb spring on the front and a 10 lb spring on the rear. If thats what u need, its masking other greater problems.

I have asked for narrower arms for sometime now, but nothing as yet, hopefully after the FF03 parts and the Sakura FWD are released the 3R crew can revisit sme other parts.
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Old 08-14-2010, 03:59 PM   #702
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Can anyone help me with a good chassis setup for a slippery concrete surface.
I am running the Sakura Zero with 13.5 tekin with rs pro esc
track temp was 16*c 64*f
tyres= sorex 20s
ride height = 5mm front and rear
rear toe = 2.5*
front toe = 1*
rear camber = 3*
front camber = 2*
downstops = 3 front and rear
caster = standard 4* kit hubs
shocks = rear = std kit with 3 hole piston 35w oil
front = option with 2 hole piston std kit oil
rear position 7, front position 3
spring = std kit 5.5 front and rear
.5 roll centre plates in front.
I used the roller diff medium-loose
I didnt seem to have much grip coming into and through corners,
I found the car pulling to 1 side on accelleration, but it didnt just pull to left it sometimes pulled to the right, One of our more experience racers commented on how it pulled to 1 side when he tried.
I have swapped the belts over. Would that cause it to pull to 1 side?
I am currently rebuilding the car and will be fitting the ball diff.
Would like your help to solve my problem and to get good setup.
Many thanks
Dave.
Has anyone broken a swingshaft? I have had 2 break ???

Last edited by davenz; 08-15-2010 at 12:38 PM.
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Old 08-15-2010, 03:05 AM   #703
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Quote:
Originally Posted by davenz View Post
Can anyone help me with a good chassis setup for a slippery concrete surface.
I am running the Sakura Zero with 13.5 tekin with rs pro esc
track temp was 16*c 64*f
tyres= sorex 20s
ride height = 5mm front and rear
rear toe = 2.5*
front toe = 1*
rear camber = 3*
front camber = 2*
droop = 3 front and rear
caster = standard 4* kit hubs
shocks = rear = std kit with 3 hole piston 35w oil
front = option with 2 hole piston std kit oil
rear position 7, front position 3
spring = std kit 5.5 front and rear
.5 roll centre plates in front.
I used the roller diff medium-loose
I didnt seem to have much grip coming into and through corners,
I found the car pulling to 1 side on accelleration, but it didnt just pull to left it sometimes pulled to the right, One of our more experience racers commented on how it pulled to 1 side when he tried.
I have swapped the belts over. Would that cause it to pull to 1 side?
I am currently rebuilding the car and will be fitting the ball diff.
Would like your help to solve my problem and to get good setup.
Many thanks
Dave.
Has anyone broken a swingshaft? I have had 2 break ???
I've bent one on the front. You can get upgraded shafts though....
I'm using the narrow 3* rear blocks and highly recommend them.
I measure droop in mm over ride height. Mine is 2mm in the rear.
I think your camber is too high for a low grip surface.
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Old 08-15-2010, 10:09 AM   #704
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Has anyone broken a swingshaft? I have had 2 break ???
Get the optional hard steel one, they are cheap and very durable.
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Old 08-15-2010, 03:58 PM   #705
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