B4 - Gearing advice & Setups please

[Chris Green]

Hello!

I have just got hold of a Nosram Matrix speedo for my B4. The motor I have at the moment is a Nosram 3 Star one, which is equivalent to a 6.5 turn brushless one I believe?

Basically, I will be running at Kidderminster, and Coventry, in the winter series, and also at the Hereford club, indoors on carpet.

If someone could give me a starting point for gearing, that would be great.

Also, a setup for the 2 outdoor tracks would help me a lot, as well as one for carpet?

I have a few random sets of tyres that came with the car, including...

2 pairs of kit ribs - Front
a pair of kit rears? proline ones?
2 pairs of proline bow ties - Rears
a full set of BB green spikes
a pair of proline step pin fronts - random!
some schumacher spike fronts. they don't feel like yellows in my uneducated opinion!, they seem a lot harder than what I thought yellows were like.

Are any of these any use at all? if not, what tyres should I be looking for?

Thanks a lot,

Chris.

[ashleyb4]

Hi chris

Gearing not to sure so ill let someone else answer htat

Setup and tyres-

Tyres the BB green spikes are very usefull good in the wet also reasonable at kiddy

This is the setup i always start with everywhere dont relaly need to change much if anything at all

Front
Shocks-
Oil 30wt
Piston - 2
Spring-blue
Tower hole- middle
Wishbone hole- inner
camber- degree
caster 30 degree (personally i like 25 but everyone says 30)
toe in- 0 degree

Rear
Shocks-
Oil- 30wt
Piston- 1
Spring- silver
tower hole- middle
wishbone hole- inner
camber- 1degree
Camber link inner- hold on U plate middle hole on hub
anti squat- 1 degree
Wheel base short

Run cells in [][][]__[][][] formation with foam in middle

Tyres-
First thing at kiddy always go out with Bb green spikes as it damp then when the track starts to dry out go to Schumacher yellow mini spikes.

Also you run BB pins at kiddy during the winter series but ive never runpins at kiddy so cant give you much advise there.

Hope ive helped

A

[Chris Green]

Thanks Ash, yeh that helps a lot. Do the cells need to be split like that? I don't really fancy splitting them.

Also, I don't know what type of caster blocks I have on the front? how do I tell?

Would the setup change much for carpet?

Thank you.

[ashleyb4]

I run the same setup indoors but we change tyres from schuamcher mini spikes to schumacher mini pins yellow compound.

As for caster block i dont know how you tell on mine i scratch it onto the surface the kits come with 25 but if your car is second hand there isnt much way to tell im afraid. You could find someone who has a spare pair and compare them to theres and see if they are the same angles etc.

As for the cell possition you can split the peice of foam and run the cells in the middle with the a piece of foam each side.

A

[ashleyb4]

Looking atone of chris doughtys setups he runs his 3 star on 20/81

Also thinking about it i tried this the other day youmay want to change to medium wheel base toget a little more steering.

A

[Deception]

Originally Posted by Chris Green

Thanks Ash, yeh that helps a lot. Do the cells need to be split like that? I don't really fancy splitting them.

Also, I don't know what type of caster blocks I have on the front? how do I tell?

Would the setup change much for carpet?

Thank you.

on mine the 25 degree's have nothing on them but the 30's have a silver sharpie mark on the inside of it that says 30 and i think same with the 20 degree also

hope this helps

[Chris Green]

Thank you, I'll check them out.

I am guessing that a 6.5t motor will be silly fast really. I can obviously turn the end point down on my transmitter, or change the throttle profile curve, but will this work effectively? If not, which motor would be best for me? a 7.5 or 8.5 i guess?

[ashleyb4]

In 2wd alor of peopel run 6.5's try it and see if you think its to fast for you possibly get a 7.5 or you can also put a piece of foam on your tranny above your trottle o it sorta limits your thrrotle.

A

[markwilliamson2001]

I would go for a 7.5 bonded first, will be easily fast enough, or just a 7.5 sintered if you cant get hold of one (Orion/Peak and latest novaks are sintered). If you are just starting out an 8.5 may be ideal. Should be equivalent of a 13/14 turn motor which is still quite quick, especially in 2wd.

Mark

[Chris Green]

Yeah, I suppose a 7.5 should be on my list of things to buy really. Don't really have the cash right now, but I'll keep an eye out for one.

I might get a Schumacher speed passion motor perhaps.

Thanks,

Chris.

[tc2k]

Your 6.5 will be fine, I just dont go full throttle like a maniac when not needed.
I gear mine 17/81 which is just above what the manual suggests, some people run as high as 22/81 but I find 17 just fine, dont see why you would need to go higher

[ashleyb4]

If its sinitered it will need to go higher thats why people gear up to something like 22.

A

[tc2k]

The 3 star motors arent sintered though, also, i dont think a sintered rotor needs 5 teeth higher.

[Chris Green]

Originally Posted by tc2k

Your 6.5 will be fine, I just dont go full throttle like a maniac when not needed.
I gear mine 17/81 which is just above what the manual suggests, some people run as high as 22/81 but I find 17 just fine, dont see why you would need to go higher

I've gone for 17 / 81 for now, and I'll see how I get on. I haven't ran it yet, but it sounds silly fast on the bench!

So, its all finished. Just need to re-solder some of my cells, as they don't all fit in the battery tray properly!

[Chris Green]

I'm racing indoors tomorrow night, with a 19t motor.

Could someone suggest gearing please? The straight will be 18-22m long I guess.

The motor is a 19t Reedy Quad Mag. Its currently geared at 23/81? anywhere near?

Thanks!

[ashleyb4]

I alwasy ran my 19t on a 22 some poeple said that was to low but i highered it and it cooked my motor so ive always left mine on 22. So yea iwould say its about right.


A

[sly]

Originally Posted by ashleyb4

So yea iwould say its about right.


A

So whats right??? Chris`s 23 or your 22???

[ashleyb4]

22 23 its about that its just to give him an idea i dont knwo what the tracks like he may start with his 23 then think he may need a little bit more low end so he goes down to a 22 you cant suggest the perfect gearing for someone you can giv ethem an idea but they have to find out the perfect gearing for there car on there track by themselves.

A

[sly]

Gone around the question without answering it, sounds like a politician. full of all the useless stuff that most can`t be arse`d about but likes telling everyone that they know whats best for all but they actually know .... all.

[josh_smaxx]

I thought he answered it, 23 sounds fine but you can go to a 22 if you feel the need... sounds ok to me.