robk

iTrader: (22)

It's 571 and 572 for sure.

Zhangesh

iTrader: (23)

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

Ph3nyx

Build vidéo for www.rcf1.fr

+ YouTube Video

for the front wing i've replaced mine with the tamiya f60 wing , but i've to drill it a bit.

Skiddins

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.

NutDriver

iTrader: (30)

Speed Passion sells lexan front wings for the SP-1 that may be a cheaper alternative.

ta04evah

iTrader: (2)

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.

Ph3nyx

Steel balls unfortunatly ...

JoJo1241

930130 carbide diff balls in the kit.
Not just steel, carbide is much tougher.

wwddww34

iTrader: (9)

How big are the balls?

NutDriver

iTrader: (30)

I'm pretty sure they're 3mm.

wwddww34

iTrader: (9)

I just checked p/n 930130 on Google, they are 1/8 inch diameter balls.

EAMotorsports

iTrader: (79)

For anyone interested Hiro Seiko X1 kits are on the site and ready to ship finally.

EA

NutDriver

iTrader: (30)

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.

wwddww34

iTrader: (9)

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.

simple

iTrader: (2)

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.