Originally Posted by Battle_axe (Post 651188)

my understanding they were MXL pitch? giving it a 2.032mm pitch? the 3mm pitch as used on the SX3 is a mutch more robust belt for todays power

Originally Posted by OldTimer (Post 651499)

I have been working out the faimly tree for the S2 / C4.1 this one is a bit longer than the Slim4 :lol:

1 - Slim2 - Shafted driven mid motor - flat CF
2 - S2 - Reversed B4 3 gear gearbox - flat CF
3 - S2 - Reversed GT2 3 gear gearbox - flat CF
4 - S2 G4 - Carbon fibre 4 gear gearbox - flat CF
5 - S2 Q - Plastic casing 4 gear gearbox - flat CF
6 - S2 Tub - Plastic casing 4 gear gearbox -tub CF
7 - S2 SWB - Plastic casing 4 gear gearbox -tub CF SWB
8 - C4.1 - Plastic casing 4 gear gearbox -flat alum (proto flat CF)
9 - S2 Evo - ;)

Originally Posted by flipside (Post 651979)

Can I expand your list ;)

10 - Komet W4.1
11 - Komet W4.2

The last one only has the C4.1 gearbox, all the rest is replaced with improved parts :D

The goal was to make a c4.1 with a correct weight balance & flex, without a chassis that bends when you're having a bit of fun, and without hingepin hangers that have play after one meeting.

Originally Posted by flipside (Post 651979)

Can I expand your list ;)

10 - Komet W4.1
11 - Komet W4.2

The last one only has the C4.1 gearbox, all the rest is replaced with improved parts :D

The goal was to make a c4.1 with a correct weight balance & flex, without a chassis that bends when you're having a bit of fun, and without hingepin hangers that have play after one meeting.

Originally Posted by OldTimer (Post 651984)

You perhaps want to wait and see what the S2 Evo brings, there are other options not on your list as well.

One thing to remember with the C4.1 its a AC designed kit, but not manufactured or supplied by AC. So i cannot confirm the quality of the materials or machining used. I am guessing what the proto-type C4.1's used and the production kit used could be different hence the issues.

Perhaps the Evo should be moved to 12 on the list :woot:

Originally Posted by flipside (Post 651986)

I was tired of waiting :) Nevertheless I am extremely curious!!

ps: my list doesn't contain all features/specs :D

Originally Posted by flipside (Post 651979)

The goal was to make a c4.1 with a correct weight balance & flex, without a chassis that bends when you're having a bit of fun, and without hingepin hangers that have play after one meeting.

Originally Posted by elvo (Post 651985)

He's been inhaling fiberglass dust :-)

Originally Posted by GRIFF55 (Post 652017)

Nice tyre trimming wooty baby!:thumbsup:

Originally Posted by OldTimer (Post 651499)

I have been working out the faimly tree for the S2 / C4.1 this one is a bit longer than the Slim4 :lol:

1 - Slim2 - Shafted driven mid motor - flat CF
2 - S2 - Reversed B4 3 gear gearbox - flat CF
3 - S2 - Reversed GT2 3 gear gearbox - flat CF
4 - S2 G4 - Carbon fibre 4 gear gearbox - flat CF
5 - S2 Q - Plastic casing 4 gear gearbox - flat CF
6 - S2 Tub - Plastic casing 4 gear gearbox -tub CF
7 - S2 SWB - Plastic casing 4 gear gearbox -tub CF SWB
8 - C4.1 - Plastic casing 4 gear gearbox -flat alum (proto flat CF)
9 - S2 Evo - ;)

Originally Posted by James (Post 651996)

My C4.1 is dialled now its bent - much better than when it arrived flat.. I'm actually serious :wtf:

Originally Posted by OldTimer (Post 651123)

The problem with the xx4 belts is they are a strange pitch which is hard to find, i will try and dig out what it is, i think they are a american standard.

On the 4X i converted everything to 3mm HTD pitch belts, a lot of cars use this like touring cars and most off road cars which are metric ie Yok, Schumacher, Xray, Serpent etc, the belts are a lot easier to get hold of.

Originally Posted by knighthawk (Post 652507)

What pully's did you use with the 3mm belts.
I'd like to convert mine to use 3mm so its safe to use brushless etc

Would you be interested in doing an upgrade kit as you have the suppliers
;) wink wink !!! :thumbsup:

Originally Posted by OldTimer (Post 652532)

Diff pulleys were from the Yok BX (33T), but remember you also need another three smaller pulleys for the center and front layshafts, so its not just a case of dropping in different gears ;)

Its not as simple as a upgrade kit otherwise i would of upgraded my XX4 :lol:

Originally Posted by andy05 (Post 652273)

S2 evo:thumbsup: i was going to get a c4.1 but i'll wait for the S2 evo now loved my S2 when they came out :wub

Originally Posted by OldTimer (Post 650340)

Ok next up is my idea of a upgraded Losi XX4 the 4X from 2008

Photo 1 - this was the 1st proto using a flat CF chassis to make sure everything fits before the mould is made for the tub chassis.

Photo 2 - This is comparing the car against a 501

Photo 3 - The tubbed version of the car, i am pretty sure Simon Reeves and Brian Preddy ran the car, problem i had was it really needed some aluminium parts like the motor plate instead of plastic which flex a lot. And with a XX4 rear end and a Cat SX front end, it would be to expensive to produce a kit as you need two donor cars. But with 3mm pitch and wider belts it was better suited for brushless and lipos.

Originally Posted by Northy (Post 720996)

Ah, B4 front, XXX rear, one of only 2 made ;)

Originally Posted by Darnoc (Post 720997)

I know mate, I have them both...... :p