52LikesTeam Losi JRXS Type-R
12-09-2007, 09:17 AM
#6032
I have like 2.5 mm of droop (mesured like JKA). I'm now running 17.5 Front and 15 rear springs. Thats how my car perform the best on our med traction track. With softer spring my car was rolling to much an felt like it has less corner speed. Again this is with a stock motor...
i got like 35 pound spring in front and 15 rear.
i measure droop by screwing the droop screws all the way out.then i do ride height.which i am at 5mm.the once i do that i set the chassi on the 6mm spot on the gage.screw the droop screw down till the tire lifts off the table.then back it back down till it touches.
is this the way you all do it?
12-09-2007, 09:30 AM
#6033
Thats the same droop measurement as mine. 1mm is probably not enough. I'm running 2mm front and rear.
12-09-2007, 11:19 AM
#6035
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12-09-2007, 12:44 PM
#6036
Rubber tire Carpet setup
At the track this weekend I had my woobie rubber tire setup (favorite one) that seems to always work real well.
They ran an abnormally high number of foam tire heats and it brought the traction WAY up (it's normally med-low grip for carpter).. I was traction rolling like crazy. Athough I had a lot of steering, it was not overwhelming.
Question: What is the best way to adjust for traction rolling... harder tires? stiffer springs? lower roll center? Sway bars? other? When I mean best, I mean one that tends to be the fastest setup(if their is one).. If not, the easiest one to change back later...
My regular setup is: (near identical to a couple floating around on this thread)
Stiff front diff (not spool)
15 lb springs all around
.165 hexes front, .225 hexes rear (pushes alot without this)
ride height front: 5.0 rear 5.5
Sorex 24's
Low roll center
LiPO weighted top and bottom to simulate Ni-MH.
13.5 motor
Current tuning options:
I carry assortment of springs.
I carry Sorex 24's, CS-27's, RP30's
Sway bars
I know the big racers out their deal with widely varying tracks all the time. Pretty much all my racing is at the local track, so rarely do I encounter conditions to far from the norm...
Your comments are appreciated.
markf3x
They ran an abnormally high number of foam tire heats and it brought the traction WAY up (it's normally med-low grip for carpter).. I was traction rolling like crazy. Athough I had a lot of steering, it was not overwhelming.
Question: What is the best way to adjust for traction rolling... harder tires? stiffer springs? lower roll center? Sway bars? other? When I mean best, I mean one that tends to be the fastest setup(if their is one).. If not, the easiest one to change back later...
My regular setup is: (near identical to a couple floating around on this thread)
Stiff front diff (not spool)
15 lb springs all around
.165 hexes front, .225 hexes rear (pushes alot without this)
ride height front: 5.0 rear 5.5
Sorex 24's
Low roll center
LiPO weighted top and bottom to simulate Ni-MH.
13.5 motor
Current tuning options:
I carry assortment of springs.
I carry Sorex 24's, CS-27's, RP30's
Sway bars
I know the big racers out their deal with widely varying tracks all the time. Pretty much all my racing is at the local track, so rarely do I encounter conditions to far from the norm...
Your comments are appreciated.
markf3x
12-09-2007, 01:42 PM
#6037
You could try a light to medium sway bar on the rear to free the car up a touch. I usually run the front roll center as high as I can. Since it wasn't a normal track condition, I'd try some of the cheap and dirty adjustments first. That way you won't have to re-invent your setup, only to switch it all back the following week.
12-09-2007, 03:41 PM
#6039
markf3x
12-09-2007, 04:07 PM
#6040
You could try a light to medium sway bar on the rear to free the car up a touch. I usually run the front roll center as high as I can. Since it wasn't a normal track condition, I'd try some of the cheap and dirty adjustments first. That way you won't have to re-invent your setup, only to switch it all back the following week.
12-10-2007, 08:00 AM
#6043
Thanks for the suggestions.
The car's current setup (low-med grip) is really well balanced and planted in the corners (you'll hear tires squeel on the carpet in many of the corners). Adding a sway bar front and back might work, but one in just the rear would be awful (I think it would swap ends in a corner really fast).
I'll play around with track width first (widen front/narrow rear). It makes sense.... try riding a tricycle into a hard corner on a grippy surface
Hopefully, when I find the track width sweet spot (that keeps me right side up) it won't of given up too much steering or to much of that firmly planted feeling.
ps- How many of my LOSI brotheren are attending snowbirds in FL or Nats in Omaha? I'm looking to make Omaha my first big race (bummer, sounds like no rubber!) and maybe go to watch at snowbirds.. Would love to race at Snowbirds, but timing is awful for my work.
Cheers,
Markf3x
The car's current setup (low-med grip) is really well balanced and planted in the corners (you'll hear tires squeel on the carpet in many of the corners). Adding a sway bar front and back might work, but one in just the rear would be awful (I think it would swap ends in a corner really fast).
I'll play around with track width first (widen front/narrow rear). It makes sense.... try riding a tricycle into a hard corner on a grippy surface
Hopefully, when I find the track width sweet spot (that keeps me right side up) it won't of given up too much steering or to much of that firmly planted feeling.
ps- How many of my LOSI brotheren are attending snowbirds in FL or Nats in Omaha? I'm looking to make Omaha my first big race (bummer, sounds like no rubber!) and maybe go to watch at snowbirds.. Would love to race at Snowbirds, but timing is awful for my work.
Cheers,
Markf3x
12-10-2007, 09:13 AM
#6045
Thanks for the suggestions.
The car's current setup (low-med grip) is really well balanced and planted in the corners (you'll hear tires squeel on the carpet in many of the corners). Adding a sway bar front and back might work, but one in just the rear would be awful (I think it would swap ends in a corner really fast).
The car's current setup (low-med grip) is really well balanced and planted in the corners (you'll hear tires squeel on the carpet in many of the corners). Adding a sway bar front and back might work, but one in just the rear would be awful (I think it would swap ends in a corner really fast).