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Old 05-11-2008, 11:48 PM   #721
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The GPX-4 is a great handling car. But concentrate on loosening up the drivetrain.
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Old 05-12-2008, 01:14 AM   #722
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Old 05-27-2008, 08:44 PM   #723
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Does anyone know when the new kit will be out(GPX-?).
Any news on the new car??...............
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Old 07-04-2008, 07:07 AM   #724
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Any news on the new car??...............
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Old 07-04-2008, 08:41 AM   #725
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Heard that it is still a while away.
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Old 07-09-2008, 09:19 AM   #726
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Default Slick Track Diff Oils for GPX 4 RTR

I just got this car RTR version and am setrting it up for a medium slick parking lot 75 x 100 with 85 ft straight and tight turns. I have 4 gear diffs in both ends and a couple of questions. Yellow springs front and blue in rear.

Common sense says start with 3,000 in both but after reading some of this post, i'm questioning that decision.

On my CD3, I'm running 3,000 rr & 10,000 frt with 40 wt and yellow springs all around. Power is a Jammin .12 on foams. (38 frt & 45 rr)

1. What weight shock oil is a start point for this condition of track?

2. What Diff oils are reccemmended for frt and rear?

3. Any reccommended starting points on foam tires Track temps are between 85 and 145 F?

Later

Phil
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Old 07-09-2008, 02:18 PM   #727
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Hi,
I run this car in RTR (pullstart class) in Oz and I run:

Shocks: 40wt oil in shocks all round

Diffs: 0K rear diff/100K front (acts similar to a spool)

Springs: Hobao/Ofna yellow front/Mugen purple rear

Tires Jaco (Nitro shoes) 38 front/Jaco (Nitro shoes) 40 rears (I true the front tires 2mm smaller than the rears when new as the rears wear much quicker)

Most of the time setup is trial and error and by feel.
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Old 07-09-2008, 02:44 PM   #728
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Quote:
Originally Posted by Taffyjnr5 View Post
Hi,
I run this car in RTR (pullstart class) in Oz and I run:

Shocks: 40wt oil in shocks all round

Diffs: 0K rear diff/100K front (acts similar to a spool)

Springs: Hobao/Ofna yellow front/Mugen purple rear

Tires Jaco (Nitro shoes) 38 front/Jaco (Nitro shoes) 40 rears (I true the front tires 2mm smaller than the rears when new as the rears wear much quicker)

Most of the time setup is trial and error and by feel.
Did you modify the hole in the shock piston? I found 40wt too thick with that small shock hole.
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Old 07-09-2008, 03:24 PM   #729
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What size do you need to drill the hole to? Is there different pistons we can purchase?

Phil
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Old 07-09-2008, 03:44 PM   #730
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What size do you need to drill the hole to? Is there different pistons we can purchase?

Phil
If you back track this thread, the best information on the car came from a guy from France. He has 2 1.2mm holes in each piston. You enlarge the .8mm hole to 1.2mm and then drill another 1.2mm hole. I have not found any aftermarket pistons.
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Old 07-10-2008, 05:44 AM   #731
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Did you modify the hole in the shock piston? I found 40wt too thick with that small shock hole.

Hi,
Yes I did sorry I went 1mm all round. I have not tried 1.2mm.........
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Old 07-10-2008, 06:05 AM   #732
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Quote:
Originally Posted by Taffyjnr5 View Post
Hi,
I run this car in RTR (pullstart class) in Oz and I run:

Shocks: 40wt oil in shocks all round

Diffs: 0K rear diff/100K front (acts similar to a spool)

Springs: Hobao/Ofna yellow front/Mugen purple rear

Tires Jaco (Nitro shoes) 38 front/Jaco (Nitro shoes) 40 rears (I true the front tires 2mm smaller than the rears when new as the rears wear much quicker)

Most of the time setup is trial and error and by feel.
What do you run for rear camber? I had to go to -3deg. to get even tire wear, or else the outer edges wear down too fast.
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Old 07-10-2008, 10:59 AM   #733
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What do you run for rear camber? I had to go to -3deg. to get even tire wear, or else the outer edges wear down too fast.
Hi,
Not sure what I have got I have not had it on the setup station for a while I just adjusted to get even tire wear like you said. I am also looking at testing some Kyosho rear uprights/hubs so I will let you know how that goes.......
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Old 07-10-2008, 11:59 AM   #734
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Quote:
Originally Posted by Taffyjnr5 View Post
Hi,
Not sure what I have got I have not had it on the setup station for a while I just adjusted to get even tire wear like you said. I am also looking at testing some Kyosho rear uprights/hubs so I will let you know how that goes.......
THX, I will be waiting to hear how that goes.
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Old 07-28-2008, 09:56 AM   #735
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Hi,
I am looking at putting my GPX-4 Pro chassis back together for a run so see how it goes. Don't know what engine to run may source a Murnan to try in it.........
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