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Old 11-08-2011
Skye's Avatar
Skye Skye is offline
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Join Date: Jun 2011
Location: Northants
Posts: 626
Default Grip Roll

Can anyone offer any additional advice on how to reduce grip roll on high traction surfaces? I am currently driving a B44.1 and am suffering from a lot of grip roll.....

As a newcomer to the game I have raced three times outdoors, once at Stotfold, once at Hinckley and once at Silverstone. So twice on astro and once on grass.

The first time was at Stotfold and simply cutting off the two outside rows of spikes on the fronts pretty much cured the problem there so the grip must be a bit lower than the other two.

Then I went to Hinckley and found that it was still grip rolling every time. I then proceded to cut of a row of spikes off of the outside and inside of the rears as well as the inside row on the fronts. I was then advised to change the springs to blues (front) and silvers (rear) to stiffen it up a bit, and also to add some weight. I added 60g of stick on weights to the central battery stay beneath the driveshaft and this again seemed to help. It didnt eliminate it but it raised the breaking point so I could go a little faster before it rolled.

I then raced at Silverstone on Tuesday and the problem was there in abundance again. Everybody was saying how much grip there was so I wasnt alone, but when I observed the other 4wd cars they seemed a lot more planted.

I know that I am not as good as the more experienced guys, so that will make a difference. But even allowing for that, I was still grip rolling on less technical areas such as the sweeping bends into and out of the straight where the other cars were hammering it through these bends significantly quicker than I could before I was losing it and grip rolling.

So Im scratching my head a little now. There has been massive improvement from where I started, of that there is no doubt. But its still not quite there in terms of keeping it planted and reducing the grip roll as much as is physically possible.

So my set up is :
FRONT
20mm ride height
Blue Springs
40wt oil
Worn yellow minispikes (2 outer rows cut off, 1 inner row cut off)
2 x 5g weight added (one either side of servo)

REAR
20mm ride height
Silver Springs
30wt oil
Worn yellow minispikes (1 inner and 1 outer row cut off)
60g weight added under rear driveshaft

All of the other settings are untouched since I built the car to the kit manual instructions.

I know this is something that cant be eliminated completely but having watched the other 4wd cars closely on Tuesday night I did observe that they were able to carry much much more speed into a bend without it rolling. At the moment I feel like I am driving on the edge as several times tuesday night I had it on two wheels round a bend, and many more times it broke free and ended up on its roof.

If anyone has had similar experiences and managed to cure it, or if you drive the same car and manage to keep it glued to the track then any advice would be much appreciated!

Many Thanks!
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