Scorpion 4x4 Build project

The place for all things Kyosho.

Moderators: scr8p, klavy69

Dadio
Approved Member
Posts: 3792
Joined: Sun Apr 24, 2016 2:21 pm
Location: Guildford UK
Has thanked: 2147 times
Been thanked: 1915 times

Re: Scorpion 4x4 Build project

Post by Dadio »

I hope my last post didn't sound dismissive of people working with more basic tools , I'm in awe of what 1300GT achieved with basic tools on his 4wd SRB custom build ,that was the inspiration for this car in the first place .
Anyway i finished the the second king pin this evening so it's just the second drive shaft to extend (I've made a sleeve and have the silver solder ready ) then it's steering time , i think i know what I'm going to do .
If a jobs not worth doing then its certainly not worth doing well.
A problem shared is a problem halved but an advantage shared is no advantage at all.

Dadio
Approved Member
Posts: 3792
Joined: Sun Apr 24, 2016 2:21 pm
Location: Guildford UK
Has thanked: 2147 times
Been thanked: 1915 times

Re: Scorpion 4x4 Build project

Post by Dadio »

Today I extended the second drive shaft and silver soldered the sleeves , after fitting and testing i was still worried that they might pop out at full lock so i decided to add springs in the diff drive cups , those drive cups are supprisingly hard steel ! I had to deepen them to make space for the springs and the only thing i had that would touch them was diamond dust dremmel tools ,took a little time but it worked and the shafts are now satisfyingly secure , they even click into place when fitting them so I'm a happy man and i can move onto the steering.
If a jobs not worth doing then its certainly not worth doing well.
A problem shared is a problem halved but an advantage shared is no advantage at all.

Dadio
Approved Member
Posts: 3792
Joined: Sun Apr 24, 2016 2:21 pm
Location: Guildford UK
Has thanked: 2147 times
Been thanked: 1915 times

Re: Scorpion 4x4 Build project

Post by Dadio »

I had a little time this afternoon so made up the chain guide pulleys , i also removed a single chain link and i think i got lucky as the tension is just about spot on :D i can still add a tensioner at a later date if it's needed ,pictures later .
If a jobs not worth doing then its certainly not worth doing well.
A problem shared is a problem halved but an advantage shared is no advantage at all.

Dadio
Approved Member
Posts: 3792
Joined: Sun Apr 24, 2016 2:21 pm
Location: Guildford UK
Has thanked: 2147 times
Been thanked: 1915 times

Re: Scorpion 4x4 Build project

Post by Dadio »

Pictures of the finalised transmission ,drive shafts extended , chain guide pulleys fitted and chain length shortened, there's a second guide pulley up front but its kind of hidden , you can see the screw that it runs on in the side of the tub in the second picture also a scratch in the tub i'll have to clean up before painting:(.
Image
Image
Image
If a jobs not worth doing then its certainly not worth doing well.
A problem shared is a problem halved but an advantage shared is no advantage at all.

Dadio
Approved Member
Posts: 3792
Joined: Sun Apr 24, 2016 2:21 pm
Location: Guildford UK
Has thanked: 2147 times
Been thanked: 1915 times

Re: Scorpion 4x4 Build project

Post by Dadio »

I made a start on the steering this evening , it's going to be tight but i think its going to work , looks like I'll have minimal bump steer if all goes well .
If a jobs not worth doing then its certainly not worth doing well.
A problem shared is a problem halved but an advantage shared is no advantage at all.

Dadio
Approved Member
Posts: 3792
Joined: Sun Apr 24, 2016 2:21 pm
Location: Guildford UK
Has thanked: 2147 times
Been thanked: 1915 times

Re: Scorpion 4x4 Build project

Post by Dadio »

I got started on the steering system , there are a few areas that need attention as yet , i have a slight binding issue on the track rod ends with suspension compressed but i have a couple of ideas to overcome it , clearance is tight as the links go under the diff out drive cups and there's only 3mm so they are just over 2.5mm thick , bump steer is acceptable and probably less than stock , its not clear in the pictures I'm afraid , the top part of the top crank for the linkage is over size at the moment as i was not sure of the relative alignment of the top and bottom arms as its not 90 degrees so i thought I'd fit it and then mark the position for cutting later .
the really good news is that it all fits under the body.
Image
Image
Image
Image
Image
Image
If a jobs not worth doing then its certainly not worth doing well.
A problem shared is a problem halved but an advantage shared is no advantage at all.

User avatar
1300GT
Approved Member
Posts: 678
Joined: Fri Feb 01, 2013 6:58 pm
Location: Clare, Australia
Has thanked: 305 times
Been thanked: 252 times

Re: Scorpion 4x4 Build project

Post by 1300GT »

Really nice work. 8)
Chris.

Toys.............they are!

User avatar
Lonestar
Approved Member
Posts: 4270
Joined: Wed Dec 12, 2007 5:17 am
Location: Switzerland, yannow, in Europe (or almost)
Has thanked: 620 times
Been thanked: 165 times

Re: Scorpion 4x4 Build project

Post by Lonestar »

I can't wait to see this thing finished :)
AE RC10 - Made In The Eighties, Loved By The Ladies.
Blue Was Better - now, Blue Is Bankrupt.
Facebook affiliate program manager: "They go out and find the morons for me".
Life is short. Waste it wisely.

User avatar
DennisM
Approved Member
Posts: 2403
Joined: Sun Feb 26, 2012 7:07 am
Location: Denmark
Has thanked: 30 times
Been thanked: 64 times

Re: Scorpion 4x4 Build project

Post by DennisM »

Hats off 8)
On a note - when You build mine, I´d like double decked trailing arms up front, instead of the link :mrgreen:
Gone fishing

Dadio
Approved Member
Posts: 3792
Joined: Sun Apr 24, 2016 2:21 pm
Location: Guildford UK
Has thanked: 2147 times
Been thanked: 1915 times

Re: Scorpion 4x4 Build project

Post by Dadio »

DennisM wrote: Mon Apr 03, 2017 1:43 pm Hats off 8)
On a note - when You build mine, I´d like double decked trailing arms up front, instead of the link :mrgreen:
I had thought of a top arm , easy enough to do by replacing the top link mount and making a top arm mount,as it is i should really make a taller mount to raise the ball joint as the steering hub is taller than the 2wd version anyway , it would also reduce the load on the flanged bearings in the king pin assembly , i have to admit to being worried about the 6mm flanged bearings not lasting too long but the move to double trailing arms is a big cosmetic change from standard that I'm reluctant to make , what i may do is go to 7mm flanged bearings and make a slightly bigger king pin assembly , there's space to do it and it would be all up stronger with possibly less play .
If a jobs not worth doing then its certainly not worth doing well.
A problem shared is a problem halved but an advantage shared is no advantage at all.

User avatar
Coelacanth
Approved Member
Posts: 7348
Joined: Thu Jul 29, 2010 6:20 pm
Location: Alberta, Canada
Has thanked: 16 times
Been thanked: 270 times

Re: Scorpion 4x4 Build project

Post by Coelacanth »

You could narrow your track a few more millimeters...Kyosho made some hexes that were 3mm thick, about the thinnest I've seen...they have taper-fit holes for the axles, mind you...you need Optima tapered axles. I wish I could remember the part number! I used a set of those to narrow the track on my CYANide on-road Optima car.

Other than those Kyosho units, the narrowest 12mm hexes I've seen that use cross-pins are 4mm thick. Those are easily available on eBay.
Completed projects: CYANide Onroad Optima | Zebra Gold Optima | Barney Optima | OptiMutt RWD Mid
Gallery - Coel's Stalls: Marui Galaxy & Shogun Resto-Mods | FrankenBuff AYK Buffalo | 1987 Buick GNX RC12L3

isobarik
Approved Member
Posts: 615
Joined: Mon Sep 22, 2008 5:09 am
Location: Sweden
Been thanked: 10 times

Re: Scorpion 4x4 Build project

Post by isobarik »

Coelacanth wrote: Wed Apr 05, 2017 12:27 am You could narrow your track a few more millimeters...Kyosho made some hexes that were 3mm thick, about the thinnest I've seen...they have taper-fit holes for the axles, mind you...you need Optima tapered axles. I wish I could remember the part number! I used a set of those to narrow the track on my CYANide on-road Optima car.

Other than those Kyosho units, the narrowest 12mm hexes I've seen that use cross-pins are 4mm thick. Those are easily available on eBay.
those are for the sp cars and have been used on the front of the lazer zxs / evolutione

and the part number is sp-62

mvh isobarik

Dadio
Approved Member
Posts: 3792
Joined: Sun Apr 24, 2016 2:21 pm
Location: Guildford UK
Has thanked: 2147 times
Been thanked: 1915 times

Re: Scorpion 4x4 Build project

Post by Dadio »

If i need to i can mill a couple of mm off the hexes that are on there , I'm going to have to remove the blue anodising as it's glaring at me as not looking right .
I've ordered up a set of Schumacher full spike tyres as they look fairly retro in a 2.2 size .
If a jobs not worth doing then its certainly not worth doing well.
A problem shared is a problem halved but an advantage shared is no advantage at all.

Dadio
Approved Member
Posts: 3792
Joined: Sun Apr 24, 2016 2:21 pm
Location: Guildford UK
Has thanked: 2147 times
Been thanked: 1915 times

Re: Scorpion 4x4 Build project

Post by Dadio »

She went for a brief test run this evening , there are two little issues .
1 it has the turning circle of an ocean liner .
2 There is a little clearance issue with the chain .
I was kind of expecting the poor turning circle and have a cure , I'm going to drill and tap the steering hubs so i can fit the ball studs for the track rods closer in ,this will increase the turning angle ,probably increase it too much but i can reduce it by end point adjustment.
The chain clearance will be easy ,either adjustment or removing a little material .
This sounds bad but this is the kind of stuff you have to expect in a project like this , I'm actually pretty chuffed that it worked as well as it did first time out .
If a jobs not worth doing then its certainly not worth doing well.
A problem shared is a problem halved but an advantage shared is no advantage at all.

mugenbulldog
Approved Member
Posts: 74
Joined: Wed Dec 02, 2009 10:03 pm
Location: Denver, CO, USA

Re: Scorpion 4x4 Build project

Post by mugenbulldog »

Two words: 4 wheel steering. Problem solved!

Post Reply

Create an account or sign in to join the discussion

You need to be a member in order to post a reply

Create an account

Not a member? register to join our community
Members can start their own topics & subscribe to topics
It’s free and only takes a minute

Register

Sign in

  • Similar Topics
    Replies
    Views
    Last post
  • more vintage kyosho vintage hopups and mods - 4x4 scorpion!!
    by ron » » in Kyosho Forum
    72 Replies
    9933 Views
    Last post by ron
  • project 4x4 tomahawk
    by jasen » » in Kyosho Forum
    10 Replies
    2012 Views
    Last post by martinthegenius
  • Scorpion project.
    by j.d.roost » » in Kyosho Forum
    5 Replies
    846 Views
    Last post by Mr. ED
  • Scorpion fibreglass project
    by DennisM » » in Kyosho Forum
    20 Replies
    1997 Views
    Last post by 1300GT
  • ReRe Scorpion build pics
    by GoMachV » » in Kyosho Re-Release Forum
    66 Replies
    5823 Views
    Last post by SMOKE-DOG
  • rere Turbo Scorpion build
    by asciibaron » » in Kyosho Re-Release Forum
    4 Replies
    954 Views
    Last post by silvertriple
  • Turbo scorpion build alloy rims
    by Turbo scorpion 73 » » in Kyosho Forum
    1 Replies
    557 Views
    Last post by DennisM
  • Scorpion & Turbo Scorpion gear pitch?
    by mjtown » » in Kyosho Forum
    10 Replies
    3860 Views
    Last post by mjtown

Return to “Kyosho Forum”

Who is online

Users browsing this forum: No User AvatarDotNetDotCom.org [Bot] and 24 guests