Finally built it!
 

EVO3 ball diff in the front, Yoko black soft springs, Yoko battery bar (why do Tamiya supply that flimsy plastic P.O.S.?), Hitec 625MG steering, Novak XRS speedo, Matrix V10 motor. 1432g all up with Sanyo 3000HV pack:)

I found the only bearings that gave a problem were the ones in the hubs. All the rest seemed free. I ran it in with a sacrificial motor at 4V for about half an hour and it all seems reasonably OK now.

Incidentally, forgot to mention. I found a 0.3 shim in addition to the 0.1 on the short side of the diff worked fine.

Re: test results
 

For a comparison...What is typial to expect at Tamiya Raceway (laptimes)

Does the new suspension conversion come with the new, smaller bearings that go in the knuckles?

For getting Tech Racing stuff, Is there a place where I can actually look at a picture of what I'm shopping for & see a price right away? I don't like the interface of Rainbow Ten's website.

What to Watch.
 

Hi, im new to rctech, this is my first post. Why not try the Motors TV channel, they usually have a good range of worldwide motorsport every day.

EVO IV 2-way diff.
 

I just got my EVO IV, and i know what ure taling about. When the car is first built, you'll find that the 2- way diff is really stiff. To cure this, if you have an LRP Pulsar peak charger or something with a motor run-in option, connect the charger to the motor and leave it running at about 4v for 15 to 20 minutes. This should loosen them up a bit.;)

Re: EVO IV 2-way diff.
 

who are you?
i also have an evo4 and i only know one other person in london whos got one.

Re: EVO IV 2-way diff.
 

also what is a 2 way diff?
do you mean a normal front diff or 1 way diff?

what compound are the tamiya tyres that come with the evo4?
are they type a's?they seem very soft apart from the inserts.

Re: Re: EVO IV 2-way diff.
 

Peter, it is Alex.

A two-way diff is a standard ball diff

i dont think that quite works... the F201 has different spacing, as i recall.

on a side note... anyone using the diff covers? i am electing to leave them off. just got the driveline built last night, and try to finish up ths eve...

Re: Re: test results
 

The best lap I've ever done is 13.15. I think Reinhard and Hara did 12.8somethings at this year's Reedy Race. Typically a good laptime is somewhere in the low 13 to mid-high 13's. Usually they're in the mid-high 13's to low 14's. Of course, this is with a mod motor. Evidently DJ just raised the bar a bit.

19T fastest lap is a 13.9 and it's only been done a handfull of times. Typically they're in the low 14's to high 14's.

This is with an open layout. Don't know what are good laps with a stock motor or 23T...

Use the diff covers. There will be less dirt getting in and less diff rebuilding. Besides, the diff covers do not affect the free-ness of the drivetrain as they don't ride anywhere near the bearings.

Up to you if you leave them off, but I wouldn't, IMHO. Any rubbish whatever allowed in will slowly eat your diff(s):cry:

When I had my Alex 'Cuda with open diffs... I never had any problems with dirt or rocks getting in or abnormal diff wear.

Re: Re: EVO IV 2-way diff.
 

Anyway, are yiou talking about me as being the only other one......?

thats kinda what i was thinking... my Cuda's have never suffered any probs with being open. prolly depends on the surface. parking lot might be safer with 'em.