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Old 10-14-2002, 03:16 PM   #2146
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007Yoshi I would start with the same springs in the front and back and then work from their.

John sounds like you have a pretty good day.
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Old 10-14-2002, 04:32 PM   #2147
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OOOO I just drove my yok outside on the street (smooth asphault) and boy it handled sweet! It wasnt twitchy at all, and this is w/ stock setup but no rear sway bar. I also used the stock tires too Man this thing is QUIET too!!! I cant wait to race it!!!!!

Last edited by 007yoshi; 10-14-2002 at 04:36 PM.
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Old 10-15-2002, 10:39 AM   #2148
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Default YOKOMO MR4 PRO WORLDS CAR ** AND** SP CONVERSION KIT FOR SALE!!

Forgot to add this -- the MR4 "motherlode" sale below also includes an Airtronics 94737 servo too.
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Old 10-15-2002, 11:50 PM   #2149
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johnbull, we cut up the weights to fit in the center slots under the front belt, as far back as you can. It worked very well and did not upset the balance of the car.
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Old 10-16-2002, 03:15 AM   #2150
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Default Rollout?

Hi guys, i was just wondering what rollout and gear ratio means?

EG, how high is high and how low is low? my rollout is 81.4, what does that mean? And is there is a safety zone that gearing ratio should stay in? And what would be better for a short tight track compared to a bigger one.

Sorry about all these questions...I'm quite new to electric.

Thanks
Jeff

ps-racing 540 and stock
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Old 10-16-2002, 04:50 PM   #2151
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Hopefully will run the Yokomo in a few weeks, carpet season is starting up again.

I think I'm going to stick with it, it would be nice to see Yokomo's next offering before I get a new car.
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Old 10-16-2002, 04:57 PM   #2152
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Default Re: Rollout?

Quote:
Originally posted by Pirvan
Hi guys, i was just wondering what rollout and gear ratio means?

EG, how high is high and how low is low? my rollout is 81.4, what does that mean? And is there is a safety zone that gearing ratio should stay in? And what would be better for a short tight track compared to a bigger one.

Sorry about all these questions...I'm quite new to electric.

Thanks
Jeff

ps-racing 540 and stock
I'm not so familiar with rollout as I have never worked with it before, but I believe your 81.4 is the distance the car will travel with one revolution of the armature ?

As for gear ratio, it has to do with what spur/pinion combination you use. Gear ratio = spur/pinion * internal ratio of your car.

Example, you have an MR-4 with a 78 tooth spur, and a 22 tooth pinion. 78/22 = 3.54 continued * 2.2 (internal ratio of the MR-4) = 7.8. This means it takes 7.8 revolutions of the armature to equal one revolution of the tires. The lower your gear ratio is (eg. 6.4 is lower than 7.2) the harder it is for your motor to accelerate your car, but since the motor is performing less revolutions to equal one revolution of the tires, you will have higher top speed. The opposite is true for a higher gear ratio. Larger pinion yields lower ratio, large spur yields higher ratio and vice versa.

Hope this helps,
Josh
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Old 10-16-2002, 05:19 PM   #2153
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Default Thanks!

HI there,

Ooops sorry, i actually measured the spurs as pinion and the other way around my rollout is actually 37.Thanks for the information at least now i know what rollout and gearing is.

Jeff
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Old 10-16-2002, 06:27 PM   #2154
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Quote:
Originally posted by Speedo
Hopefully will run the Yokomo in a few weeks, carpet season is starting up again.

I think I'm going to stick with it, it would be nice to see Yokomo's next offering before I get a new car.
yokomo's new car will be a mr4 sp with the 'worlds' kit (deck and towers etc) my understanding is that no 'revolutanary' change is anywhere close

on another issue there wont be a hpi pro4 untill all pro3's are gone (no surprise there i guess)
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Old 10-16-2002, 07:44 PM   #2155
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Guys -- see my earlier post on called "Yokomo MR4-TC Pro Worlds ** AND ** SP conversion "motherlode" sale".

You can get a Pro Worlds car ** AND ** the SP conversion kit ** AND ** a BUNCH of brand new parts and hopups for the SP -- all for a GREAT price!!

This car has only been run for 2 carpet seasons indoors. It is in PERFECT condition -- like it was just built !!!

Pictures available of everything !

email: jeff.fritsche@esker.com
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Old 10-17-2002, 12:24 AM   #2156
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so us guys with mr4tcsp cars should be able to get
an upgrade kit to the new specs
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Old 10-17-2002, 05:34 AM   #2157
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if there arent any revolutionary changes, then probably yes. I would like to hope so
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Old 10-17-2002, 05:53 PM   #2158
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my source suggested that initally at least there was not going to be an upgrade kit... but i dare say it will become available or certainly the parts would
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Old 10-17-2002, 07:34 PM   #2159
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Got a Web site from Japan. Picture from Tokyo Hobby Show.
Last three pictures are from Alex Racing.


http://www.pro-s-futaba.co.jp/hs2002-4.htm

Looks like it will be a package deal, kind of like MR4TC Special Upgrade.
J.
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Old 10-17-2002, 07:54 PM   #2160
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Damn as soon as that setup is available in the US I will have my new Yoke stuff on order. That car is just bad azz. I want it!!!
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