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Old 03-09-2015, 02:14 PM   #676
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Aren't the Tamiya TCS tires the 571 front and 572 rear? They certainly don't drive like 574 fronts.
It's 571 and 572 for sure.
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Old 03-12-2015, 12:55 AM   #677
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Hi all, i'm looking to replace the lexan front wing of my x1 with a plastic front wing because i've damaged the lexan wing (screws ripped holes in the lexan in an accident). Which wing gives the most downforce and fits well? (prefer not having to modify the wing too much)

Also what tires do people have the most success with? I run on low-med grip asphalt, 30-40 deg track temp. Currently running R1's all round but I have heard that it may be better running Shimizu's up front and R1's in the rear? (or was it the other way around...)

Thanks for any input
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Old 03-12-2015, 01:56 AM   #678
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Build vidéo for www.rcf1.fr
+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.


for the front wing i've replaced mine with the tamiya f60 wing , but i've to drill it a bit.
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Old 03-12-2015, 02:22 AM   #679
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Originally Posted by Zhangesh View Post
Hi all, i'm looking to replace the lexan front wing of my x1 with a plastic front wing because i've damaged the lexan wing (screws ripped holes in the lexan in an accident). Which wing gives the most downforce and fits well? (prefer not having to modify the wing too much)

Also what tires do people have the most success with? I run on low-med grip asphalt, 30-40 deg track temp. Currently running R1's all round but I have heard that it may be better running Shimizu's up front and R1's in the rear? (or was it the other way around...)

Thanks for any input
Anything for the Tamiya F103 or F104 will fit with the mounting screws (although they may need to be slightly longer than kit), but the bodypost will be in the wrong place.
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Old 03-12-2015, 07:31 AM   #680
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Speed Passion sells lexan front wings for the SP-1 that may be a cheaper alternative.
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Old 03-12-2015, 08:05 AM   #681
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Originally Posted by Ph3nyx View Post
Build vidéo for www.rcf1.fr
+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.


for the front wing i've replaced mine with the tamiya f60 wing , but i've to drill it a bit.
Great video, good to see some of the parts in close up detail.

Another question I have is, are the diff balls in the kit steel or ceramic?

Hopefully getting my kit next week

Rob.
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Old 03-12-2015, 08:16 AM   #682
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Steel balls unfortunatly ...
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Old 03-12-2015, 09:53 AM   #683
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Originally Posted by ta04evah View Post
Great video, good to see some of the parts in close up detail.

Another question I have is, are the diff balls in the kit steel or ceramic?

Hopefully getting my kit next week

Rob.
930130 carbide diff balls in the kit.
Not just steel, carbide is much tougher.
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Old 03-12-2015, 10:07 AM   #684
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930130 carbide diff balls in the kit.
Not just steel, carbide is much tougher.
How big are the balls?
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Old 03-12-2015, 10:18 AM   #685
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I'm pretty sure they're 3mm.
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Old 03-12-2015, 10:25 AM   #686
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I'm pretty sure they're 3mm.
I just checked p/n 930130 on Google, they are 1/8 inch diameter balls.
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Old 03-12-2015, 10:37 AM   #687
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For anyone interested Hiro Seiko X1 kits are on the site and ready to ship finally.

EA
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Old 03-12-2015, 11:15 AM   #688
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Since 1/8" directly converts to 3.175mm, is there an effective difference between the two sizes (that's less than .007")? I've been told that there are, but I have a hard time believing that tolerances are tight enough, especially in a ball diff, for it to be a perceivable difference.
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Old 03-12-2015, 11:21 AM   #689
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Since 1/8" directly converts to 3.175mm, is there an effective difference between the two sizes (that's less than .007")? I've been told that there are, but I have a hard time believing that tolerances are tight enough, especially in a ball diff, for it to be a perceivable difference.
I have tried using 3mm balls (in lieu of 3.175mm) in the past and it all comes down to how thick the bearing is in the middle of the spur gear. If the bearing is thicker than the diff ball diameter, then the diff plates will not make solid contact with the diff balls and your diff will not work properly.
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Old 03-12-2015, 01:30 PM   #690
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Also, a standard spur gear intended for use with 1/8 balls will perform awful when 3mm balls are substituted.
I've had some cases where a random 3mm from my Tamiya cars got mixed into my crc parts, and resulted in a confusing and crappy diff racing weekend! The ball was small enough in comparison that the rings wouldn't make contact, and it almost appeared that the the inner thickness of the spur gear was wider than the ball!
Additionally, there was significant slop of the balls in their pockets. Was a pain to attempt assembly when they would fall right through.

As a general rule: don't substitute them, and don't guess. It'll make your racing more enjoyable.
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