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View Full Version : HM, 90mm, tall body - you gotta try it!


TheSteve
2013.03.19, 12:21 AM
A few of us locally decided it would be fun to running something a little different. Right now we're running the HM motor mount, Kyosho stock motor, 6 tooth pinion, 90mm wheelbase and narrow config(including narrow rear tires). We are running the tires that are included with the body, so 30 degree slicks front and rear. We do have bearings, ball diff, oil shock and carbon t-plate. I am running an Abarth body.

Driving fast is much tougher with this config then my souped up regular MR03 or AWD, its a good challenge class, especially fun on a tight track. If you're up for a challenge and want a car which forces you to be super smooth in the turns to be fast give it a go!

http://thesteve.ca/abarth7s.jpg
http://thesteve.ca/abarth21s.jpg

NoBrainer
2013.03.19, 03:05 AM
Looks awesome.
Nice to see somebody racing other bodys to.

trexflyer02
2013.03.19, 03:50 AM
Have you tried the new Elise body?

I just built up a narrow spec RM MR03 and am probably going to use the Elise body as a "fun" car. Just need to buy a board and I'm set :)

arch2b
2013.03.19, 07:44 AM
Remnant runs a 90mm class, albeit an open 90mm class. it's interesting to find you can get a beetle or cooper to challenge some mod class setup's :) fun to drive and fun to watch as well.

autoscales have historically come with different tires over time so that could be a mix bag unless you specify tires.

TheSteve
2013.03.19, 01:09 PM
So far the only real oddity for me was when I taped the body to prevent rattle. The car would hop which caused oversteer and understeer. By removing the tape so the body can rattle around the car is much more stable.
The proper solution is likely to tape the body and then alter suspension/tires to get it working but so far the no tape approach yielded the fastest lap time.

I may also try other tires, I almost feel as though 40s might be better then 30s if I can have the car slide just a little but not so much its out of control. It would be nice to have a car you can push as hard as you want without worrying about traction rolling.

arch2b
2013.03.19, 01:39 PM
ditch the tape and use sticky tack (http://www.blutack.com/) of whatever brand (http://duckbrand.com/products/mounting-products/poster-putty) you choose. a very sliver will help keep the body on and hold it in position without squeezing it onto the chassis. it's worked well for the guys at remnant race track. it will still pop off if hit hard enough though. it's a good middle of the road option.

there are also options of custom body mounts that have added traction via holds to the numbs sticking off the end of the chassis.

cowboysir
2013.03.19, 01:43 PM
So far the only real oddity for me was when I taped the body to prevent rattle. The car would hop which caused oversteer and understeer. By removing the tape so the body can rattle around the car is much more stable.
The proper solution is likely to tape the body and then alter suspension/tires to get it working but so far the no tape approach yielded the fastest lap time.

I may also try other tires, I almost feel as though 40s might be better then 30s if I can have the car slide just a little but not so much its out of control. It would be nice to have a car you can push as hard as you want without worrying about traction rolling.

Want me to bring down the heat gun on Sunday? I've found that tall bodies can conform really easily with some carefully applied heat. No more tape to hold it in place....

You and Grant pretty close time wise with the HM setups? He had his pretty dialed at the last GTG...

TheSteve
2013.03.19, 02:03 PM
Want me to bring down the heat gun on Sunday? I've found that tall bodies can conform really easily with some carefully applied heat. No more tape to hold it in place....

You and Grant pretty close time wise with the HM setups? He had his pretty dialed at the last GTG...

I have a heat gun so I can give it a shot. The body has never come off, it just has a nice rattle to it.

My best lap so far is 1/10 of a second quicker on my home track then his Abarth. They are setup very similar though and behave about the same right now.

Pierro
2013.03.19, 04:31 PM
Hello!

In Belgium we have such a category.

Here's a pic of the last qualification at the race that was hold at our club:
http://sphotos-a.ak.fbcdn.net/hphotos-ak-ash4/487600_496981643670496_370422948_n.jpg

Very fun class to race. Stock motor, bearings, oil shock and all stock for the rest.

My vitz (white with red stripe), was hella fast on our track and once you've found the good front tires, you can indeed go full attack even with such a narrow body.

gctkaz
2013.03.19, 06:36 PM
What I don't understand is how you and Grant could get any rear traction at all with the narrow rear tires.

Last time I tried it with my S15, I used Atomic 10* and still could neither accelerate nor turn without spinning out. I didn't have Kyosho tires available at the time, but just this week I finally installed the Atomic narrow 90mm MM so I can use wide rear tires. Just need to get a tie rod from Derek and it should be ready to go for the next meet.

TheSteve
2013.03.19, 07:38 PM
I have no idea either, but it works!

On my other cars I'm running Kyosho 10 wide tires in the rear to get the grip I want.

cowboysir
2013.03.19, 07:46 PM
What I don't understand is how you and Grant could get any rear traction at all with the narrow rear tires.

Last time I tried it with my S15, I used Atomic 10* .

There's your problem in a nutshell...Ryan and Dave's track is a very Kyosho friendly track for imbedded tire compound and Atomic rears suck mostly.

I can bring some narrow K20 if you need them Geoff.

I don't think my 911GT1 is a workable HM so I'll have to stick to that PN 90mm I have...:D

TheSteve
2013.03.19, 09:03 PM
If you've run mainly silicone based tires(Atomic and PN I believe) on RCP then you'll find the Kyosho tires don't have anywhere near the grip. If you start running only Kyosho tires on RCP the grip level will come right up. I've pretty much decided I only want Kyosho tires on my RCP. Once the grip comes up you can run the harder tires and they last a long time. Kyosho doesn't use any silicone...

gctkaz
2013.03.20, 03:39 PM
Thanks for the offer, cowboy. I am already switching over all my tires to Kyosho rubber. I could use those narrow slicks for my AWD if you have some you could let go!

lfisminiz
2013.03.20, 05:25 PM
If you've run mainly silicone based tires(Atomic and PN I believe) on RCP then you'll find the Kyosho tires don't have anywhere near the grip. If you start running only Kyosho tires on RCP the grip level will come right up. I've pretty much decided I only want Kyosho tires on my RCP. Once the grip comes up you can run the harder tires and they last a long time. Kyosho doesn't use any silicone...

Steve, just to let you know...i think PN tires are rubber. Atomic are more silicone.

lfisminiz
2013.03.20, 05:27 PM
Actually, i thought i heard the Kyosho 10 degree radials had silicone in them?

DanDan
2013.03.21, 02:45 PM
Actually, i thought i heard the Kyosho 10 degree radials had silicone in them?

I've heard the same thing

TheSteve
2013.03.21, 03:00 PM
There is a post on MZR suggesting the 10 degree tires may use silicone but the kyosho.com website states no silicone is used.

Most of the Atomic tires have a silicone feel to them. I have some PN tires that feel the same way and some that don't.

If you run a tire with a high silicone content(such as Atomic) on a laminate floor it makes the floor as slippery as ice. I haven't tried it with PN tires but any Kyosho's I have used do not seem to make the floor slick.

All I know for sure is that I'm not running any Atomic or PN tires on my home track. The Kyosho's are working so well we have all switched to them and are very happy, they are also the cheapest most of the time.

arch2b
2013.03.21, 04:47 PM
There is a post on MZR suggesting the 10 degree tires may use silicone but the kyosho.com website states no silicone is used. ....
unless there is proof otherwise, reports to the contrary are simply forum discussion. not saying kyosho can't be wrong some times but i would trust the mamuf. more than random forum talk without specific evidence to the contrary.

Pierro
2013.03.23, 06:27 AM
Hi,

I also saw on some post that kyosho tires did contain some silicon but never any clue on this so this leaves me a bit wondering about the truth of this information.

I personnaly use kyosho tires on my vitz. Either 30 radials front and 20 radials rear (new) on the smooth side of RCP and on our track which is on the other side of RCP I use 40 radial made slick front and 20 radials that became slick on rear. As far as options, I use the hardest FRP plate from kyosho and green spring on front.

I really love this category as it's a fun to drive due to the short wheelbase and the tall body give it a challenge to be driven fast.

Traveler
2013.03.23, 07:53 AM
Steve, just to let you know...i think PN tires are rubber.

To clarrify a little more... PN RCP tires are rubber. PN also makes a carpet tire which has some silicone in it according to the item description. ;)

arch2b
2013.03.23, 10:26 AM
good to bring that to the forefront again. those i know that use PN tires use PN RCP tires only.

lfisminiz
2013.03.23, 03:25 PM
To clarrify a little more... PN RCP tires are rubber. PN also makes a carpet tire which has some silicone in it according to the item description. ;)

Thats what im saying.:p;):)

MXMRCR
2013.03.23, 03:40 PM
it's a wikid idea and looks like fun...getting the 'driving' aspect into a class is all good imo, HM 90mm, i.e. 500's, Vitz?, Jazz?..all would be a challenge to go fast with plus a change and fun break from full tilt racing i.e. 98mm F+2, R+3 (mosler).

how about an AWD specific or 'Rally' where the RCP track is layed out in a road or stage start/finish where you have to follow your car along the track to the finish like they do with 1/10 rc rally...atleat with mini-z we wouldn't have to run so far :)

the yellow chassis in Hm looks cool :) you should paint a 500 in yellow :D