OnRDPassion

iTrader: (59)

Are the MR33 springs the same as the Ride springs?

JoeyE

iTrader: (45)

If you know the rates of MR33, you can compare it to the chart from Ride.

RIDE TC Pro Matched Spring
Spring [lb/in] [gf/mm]
Purple 17.70 316.00
Red 16.86 301.00
Blue 16.07 287.00
Green 15.23 272.00
Yellow 14.50 259.00
White 13.89 248.00

zaraz

iTrader: (38)

I was going to purchase a 417 kit from Tamiya USA, they have the kit part number 42200 for 399.99 and diff part number 42185 for 31.01, total would be 431, but they do not ship to Canada, If some one was kind enough to purchase the items and ship them to me, my postal code is n3c3w5 Ontario Canada, I would paypal you the money plus the shipping, please pm me if you can help me out thanks

CraigM

iTrader: (34)

Yep same springs just blue

dingsky

Hi guys,

I have finally finished the build, and test run it with 17.5t tekin esc/motor combo. I am wondering how fast a 17.5t cars should be I was using 27t pinion and 113 spur. I feel it was a bit slow or not sure what else i need to do to make it faster.

I conneted esc to hotwire and havent changed default settings, still on dual/locked spec mode I believe, the interface/window applet of hotwire is amazing too

your input to a newbie is highly appreciated, thanks.

Here are some of the pics

sosidge

You are well undergeared, a 17.5 in blinky mode needs to be between the low 4's and the low 3's overall depending on track, you are at 8:1 or so.

tamiyaf1

iTrader: (2)

I have the 417x and I have been running 64 pich 98t and my piñon is a 53thar shud get you in the rite spot.

SS LS1

iTrader: (23)

Nice car, you might want to drill holes in the tops of your ball cups or cut the tops off with a hobby knife. This will allow you remove the ball studs with a 2mm wrench without having to pop the ball cup off first thus keeping from stretching out the ball cup sockets.

The further back the weight of components is on a car the faster it will rotate in a corner. So you might want to mount your receiver and speed control closer to the motor after running the car for awhile.

Assuming your are running 17.5 blinky class (no esc timing) I would shoot for about a 3.5 FDR to start with the motor endbell timing cranked all the way up. I also recommend a Yeah Racing tornado fan mounted 6-8 mm behind the motor to keep the motor cool.

http://www.tqrcracing.com/shop/produ....asp?p_id=2334

For blinky mode you should use the hot wire and set the speed control to sensored only with the timing set to C1. It looks like you are in dual mode which is sensored start only then the esc stops looking at the sensors once the motor is rolling along.

If your esc is set to forward only nevermind the following.......... If set to have delayed reverse for practice change your reverse speed from 100 to about 30. Otherwise you will be scarred silly the first time you grab full speed reverse by accident.

Have fun!

dingsky

Thanks guys for the replies

@sosidge:
Ok i will try to get to 3:1 or 4:1. i pressumed that is what you meant.

@ tamiya:
Ok i will need to compute for fdr with those gears. Btw, do you have the tamiya part number for 98t spur handy? I am using tamiya 0.4 pinions, not sure if tamiya has 98t spur that goes with 0.4mm pinions. I will have to google it later.

@ SS LS1
Im still trying to grasp the terms about drilling holes in ball cups, are there any pics posted so i get a better picture of what you ment there?

Ok i will try to re position the esc and receiver closer to motor.

Final drive ratio of 3.5, ok got it, hmmm from the supplied spur 111t the lowest fdr i can get to is 4.8... So i need lesser number of spur teeth then, will look for a tamiya brand then, to be sure it is 0.4.

Fan motor position, behind motor means rear end of the car? Also how do you mount it? With heatsink is better?

I will play around with the hotwire settings as you suggested.

About motor endbell timing how do i crank it all the way up?

Thanks again guys.

Csaari77

iTrader: (35)

Don't bother with trying to find Tamiya spurs that size. I'm pretty sure they don't make them for the 417. RW racing V2 spurs work really well. You can get them through Speedtech RC.

JoeyE

iTrader: (45)

17.5 Blinky I run 90T RW Racing V2 spur with a 43 pinion. FDR is around 4.

mxgregg

iTrader: (32)

How do you figure out the FDR? I always thought you divided the spur gear by the pinion size?

napoleon1981

iTrader: (11)

The car itself has a drive ratio too. It is in your manual. It is a tad more than 1.9. So you will have to multiply with this value.

Csaari77

iTrader: (35)

(Spur gear/Pinion Gear) * Transmission ratio = Final Drive ratio

Transmission ratio for the 417 is 1.947

nolo148

spur divided by pinion X internal gear ratio. The internal gear ratio is the large pulley divided by the centre pulley. Ex. 100 spur divided by 42 pinion X 1.947 (internal ratio of TRF417) = 4.63