Yokomo MR-4 TC Thread
10-20-2001, 08:36 AM
#587
Tech Apprentice
sweet. thanks for the info guys. I tried it out today and it ran great. You know of any sites i can download some setup shets from?
10-20-2001, 10:45 AM
#588
TC3Killer: Check my site for some setups. Link down there V
10-21-2001, 06:41 PM
#589
Got a question for you Yokomo experts! What are the differences between the Barry Baker Edition MR4TC and the Worlds addition or the New special edition! Why is the Barry Baker Edition so $?
10-21-2001, 06:57 PM
#590
The BB edition comes with the worlds and pro chassis, both styles of arms etc...But it is stupid, especially so since he now drives for AE! The worlds a a pro with just a little more. The special is the newest car, has a new narrowed graphite chassis, graphite upper deck, new battery strap, new bulkhead and new center one-way, among other things. If you're buying a yok, it is the car to get because it ROCKS, and you don't have to buy anything for it to be fast.
10-21-2001, 10:41 PM
#591
Tech Initiate
O.K. I've thought all along that the stainless steel spring fell between the yellow and the green. From what I understand, the less the number of coils on a spring, given the fact that the "wire" is the same thickness, the stiffer the spring.
RcRacing.com's spring guide
From softest to hardest:
YS-1360 black
YS-1355 blue
YS-1465 white
YS-1460 fluorescent yellow ~ 12 lbs
YS-1455 flourescent green ~16 lbs
YS-14525 stainless
YS-1450 orange ~20 lbs
Kentech's site spring guide
YS-1360 BLACK
YS-1465 WHITE
YS-1355 BLUE
YS-1460 YELLOW (fluorescent) SOFTER /\
YS-14525 for TCR (stainless)
YS-1455 GREEN (fluorescent)
YS-1450 ORANGE
This number is reflected in the part number for the springs. For instance the yellow, is 1.4 mm wire, with 6 turns or coils, green 1.4mm 5.5 turns. I'm looking at the springs right now, and counting the coils myself. The stainless has 1.4mm wire, but 5.25 coils. Isn't this stiffer, so ever slightly than the green, and what I've heard and read before about the silver falling between the yellow and green, FALSE.
This is not a major issue, but it has to be the reason I missed all those A mains. Ha.
I've even heard Paul from Yokomo say that the silver fell between the green and yellow. Maybe it does and the coils are not telling the truth. The above spring chart was copied from Rcracing.com. They evidently feel that the silver is slightly stiffer than the green. Kentech, and all his great help, has on his site that the silver falls between the green and yellow. I am not ripping anyone, rcracing and kentech have been great help to all of us, I just wonder if I have been going the wrong way in trying to make that small adjustment thinking that the silver was a little softer when actually it's stiffer. If you look at the charts, you will see that blue and white are also flipped. Kentech's list has the springs exactly the way the spring chart that is included in the package when you buy a set of springs. So Kentech's site is right on that one, unless Yokomo is wrong and the blue is actually softer that the white. But the real question was about the Silver and where it fell. Thanks for all your help.
Thx in advance for any responses.
Steve Medina
RcRacing.com's spring guide
From softest to hardest:
YS-1360 black
YS-1355 blue
YS-1465 white
YS-1460 fluorescent yellow ~ 12 lbs
YS-1455 flourescent green ~16 lbs
YS-14525 stainless
YS-1450 orange ~20 lbs
Kentech's site spring guide
YS-1360 BLACK
YS-1465 WHITE
YS-1355 BLUE
YS-1460 YELLOW (fluorescent) SOFTER /\
YS-14525 for TCR (stainless)
YS-1455 GREEN (fluorescent)
YS-1450 ORANGE
This number is reflected in the part number for the springs. For instance the yellow, is 1.4 mm wire, with 6 turns or coils, green 1.4mm 5.5 turns. I'm looking at the springs right now, and counting the coils myself. The stainless has 1.4mm wire, but 5.25 coils. Isn't this stiffer, so ever slightly than the green, and what I've heard and read before about the silver falling between the yellow and green, FALSE.
This is not a major issue, but it has to be the reason I missed all those A mains. Ha.
I've even heard Paul from Yokomo say that the silver fell between the green and yellow. Maybe it does and the coils are not telling the truth. The above spring chart was copied from Rcracing.com. They evidently feel that the silver is slightly stiffer than the green. Kentech, and all his great help, has on his site that the silver falls between the green and yellow. I am not ripping anyone, rcracing and kentech have been great help to all of us, I just wonder if I have been going the wrong way in trying to make that small adjustment thinking that the silver was a little softer when actually it's stiffer. If you look at the charts, you will see that blue and white are also flipped. Kentech's list has the springs exactly the way the spring chart that is included in the package when you buy a set of springs. So Kentech's site is right on that one, unless Yokomo is wrong and the blue is actually softer that the white. But the real question was about the Silver and where it fell. Thanks for all your help.
Thx in advance for any responses.
Steve Medina
Last edited by StMedina; 10-21-2001 at 10:57 PM.
10-22-2001, 12:47 AM
#592
Hi guys. Greetings from Malta.
Steve. The easiest way to check springs is to compress them against each other. Obviously the softest will compress first.
I keep my springs in a multi compartment box, starting with the softest at the top and ending with the stiffest at the bottom.
The range starts with Tamiya springs (very soft - plenty of grip), through Yokomo, Corally, Schumacher and TC3, and finishing off with Predator springs which are the stiffest I have found yet. One word of advice if you use this system - don't let anyone near the box, because if they upset the order it's a hell of a job getting them all sorted correctly again.
What a shame manufacturers don't agree on an International colour coding system. It would make our life so much easier.
Glad to report that I had one of my most satisfying race meetings yesterday with the MR4 Special performing excellently throughout.
In the first final I finished 4th overall and first Yoke with a time that was about 8 or 9 seconds away from the winner and 4 seconds from the 3rd placed car.
In the second I got relegated to last in a first corner mellee, and climbed back up to sixth, despite a roll - my only big boob in the whole race.
But it wasn't so much the result that pleased me as the fact that the car ran and handled so well throughout. There was no question of starting off badly and the car improving, or vice versa - it was great throughout.
Incidentally equipment used was Corally 12 x 2 motor, Corally 3000 Panasonic cells, and Novak Cyclone TC speedo.
Regards
Joe from sunny Malta.
Steve. The easiest way to check springs is to compress them against each other. Obviously the softest will compress first.
I keep my springs in a multi compartment box, starting with the softest at the top and ending with the stiffest at the bottom.
The range starts with Tamiya springs (very soft - plenty of grip), through Yokomo, Corally, Schumacher and TC3, and finishing off with Predator springs which are the stiffest I have found yet. One word of advice if you use this system - don't let anyone near the box, because if they upset the order it's a hell of a job getting them all sorted correctly again.
What a shame manufacturers don't agree on an International colour coding system. It would make our life so much easier.
Glad to report that I had one of my most satisfying race meetings yesterday with the MR4 Special performing excellently throughout.
In the first final I finished 4th overall and first Yoke with a time that was about 8 or 9 seconds away from the winner and 4 seconds from the 3rd placed car.
In the second I got relegated to last in a first corner mellee, and climbed back up to sixth, despite a roll - my only big boob in the whole race.
But it wasn't so much the result that pleased me as the fact that the car ran and handled so well throughout. There was no question of starting off badly and the car improving, or vice versa - it was great throughout.
Incidentally equipment used was Corally 12 x 2 motor, Corally 3000 Panasonic cells, and Novak Cyclone TC speedo.
Regards
Joe from sunny Malta.
10-22-2001, 03:13 AM
#593
Here's the final truth about the Yokomo springs! 
I just received this from Masami.
for TC:
1360 black 519g
1355 blue 561g
1465 white 591g
1460 hot yellow 690g
14575 hot pink 703g
1455 hot green 738g
14525 stainress 692g (The 14525 is softer because using different material)
1450 hot orange 949g
for GT4:
1560 dark green 870g
1660 red 982g
1655 yellow 1210g
1650 green 1335g
1760 silver 1389g
1755 gray 1416g
1750 brown 1722g
Hope this helps!
I just received this from Masami.
for TC:
1360 black 519g
1355 blue 561g
1465 white 591g
1460 hot yellow 690g
14575 hot pink 703g
1455 hot green 738g
14525 stainress 692g (The 14525 is softer because using different material)
1450 hot orange 949g
for GT4:
1560 dark green 870g
1660 red 982g
1655 yellow 1210g
1650 green 1335g
1760 silver 1389g
1755 gray 1416g
1750 brown 1722g
Hope this helps!
10-22-2001, 11:27 AM
#594
Just a note... that's gr/3mm. So 519gr to compress a black spring 3mm. Added this to the tips page on my site as well.
10-22-2001, 12:34 PM
#595
Tech Adept
Spring Rates
that's interesting information but its virtually impossible to compare or convert those numbers over to other spring mfrs that claim rates. Both Losi and Assosiated have springs from about 12 to 40 lbs as they call it. I believe that that is lbs of force per inch. Mostly what I have heard are people's guesses as to the yokomo spring rates. An example would be that the orange spring is about 18lbs. So thoses numbers don't really correlate to anybody elses springs because you have to take the springs progression rate into consideration. You'd either have to take you AE springs and test them at 3mm of compression or take the Yok springs and test them at 1 inch compression before you can compare.
10-22-2001, 03:25 PM
#596
Re: Spring Rates
Originally posted by Dave Kurschner
that's interesting information but its virtually impossible to compare or convert those numbers over to other spring mfrs that claim rates. Both Losi and Assosiated have springs from about 12 to 40 lbs as they call it. I believe that that is lbs of force per inch.
that's interesting information but its virtually impossible to compare or convert those numbers over to other spring mfrs that claim rates. Both Losi and Assosiated have springs from about 12 to 40 lbs as they call it. I believe that that is lbs of force per inch.
To convert the Yokomo numbers to pounds per inch just divide by 52.9 and you get pounds per inch. For the Yokomo white spring (591g/3mm) divide 591 by 52.9 for 11.17. Round off to 11.2 if you like.
Trips
10-22-2001, 04:26 PM
#597
I thought the silver spring was actually below yellow. I compressed the two together and the silver definately seemed softer, but more progressive. I think that was the original silver, isn't there also a new silver?
10-22-2001, 04:26 PM
#598
oh, and johnbull- you must not have come across picco springs!
10-23-2001, 07:37 AM
#599
Spring rate
I divide by 53.6.
I tested the Yokomo springs on a gig and I got higher reading then the ones below. I'll re-check them.
I tested the Yokomo springs on a gig and I got higher reading then the ones below. I'll re-check them.
10-23-2001, 07:44 AM
#600
Thanks for all the good info guys, keep it coming!!!
Quick question: if you guys were running on a medium traction asphalt track that was a little bumpy, would you try going down on the shock oil weight? I'm running 45/40 right now, I was thinking of going to 35 squared. Give me a little feedback. My setup is basically Masami's basic, but with the ride height and shock length a little longer cause we have some seams in the asphalt that hit the bottom of the chassis if it's too low.
Quick question: if you guys were running on a medium traction asphalt track that was a little bumpy, would you try going down on the shock oil weight? I'm running 45/40 right now, I was thinking of going to 35 squared. Give me a little feedback. My setup is basically Masami's basic, but with the ride height and shock length a little longer cause we have some seams in the asphalt that hit the bottom of the chassis if it's too low.
