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R

rossb

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I see that most guys run about 2 degrees of toe-in towards the car in the rear and about 1.5 degrees of toe-out away from the car in the front. What about Camber? Are you running negative camber (tires tilting in towards car) or positive camber (tires tilting out)?

Also, how do suspension settings differ when running foams vs rubber?
 
Negative camber is used. It helps with the tires footprint when in a turn and it's stability.

Suspension settings are very different when comparing between foam and rubber. Rubber tires are softer and will experience more tire flex and will roll over itself on the bead. There is a flex with foams as well but it's a more agressive stance and will not flex as much.

For foams, the settings are set more agressively than with rubber tires. Racers using foams will experience a "coning" effect after running. On rubber tires, extensive wear will result in blow out or bead seperation.
 
Hey there... new to the forum, but love it so far :)

I was talking to a guy at the hobby shop about this very subject. He told me that the rears should be set to 0 camber and the fronts should be set to NEG 1.

I tried that with a very minor toe-in and my ability to control the car (and the ease on the wear of the tires) made for a HUGE difference.

Before I did this, the car steered very eratically, and now it's like it's on rails (well... as long as I don't overly push the speed in turns).

Hope that helps...
 
UC, was he giving you the adjustments for foam or rubber tires? Foam and Rubbers have different adjustments.
 
I am going with:

-2 Front Camber
0 Front Toe
-2 Rear Camber
-2 Rear Toe

40 Shore Jaco Foams for the track, 26mm Front, 30mm Rear

One thing I just noticed is that it is very hard to get my rims and hexes to sit totally straight on the axle. When spinning some of my tires I can see that the camber or toe varies a bit through the rotation. My car came with cheap plastic hexes. I think I need to upgrade to better hexes.
 
I run

-1.5-2 Front camber
-2 Rear camber
-2 Rear toe
+.5-1 Front toe
+2 to 4 droop all around depending on track conditions
5 mm front ride height
6 to 6.5 rear ride height

37sh front 26mm/35sh rear 30mm or 40sh/37sh. At most I'll go 42/40 on a very hot day summer day.

For shocks (oil weight and hole settings)... it all depends on the track. The same thing goes for roll bar settings if you run with roll bars.

There's so many variables but those general settings I use is for a slightly dusty, loose track. High grip tracks will need a little bit more tweaking but the settings won't mean squat if your suspenion isn't tweaked correctly and that can only be done on a teak board.
 
Rubber.... worked great for me... the toe in is critical though... you go to far with that and it spells disaster!

:cheers:
Alex
 
AAAAh, I used to use rubber tires till I saw the performance gains of using foams. Also was more cost effective using foams.
 
Really? I'm new to all of this... what foams are the best? What's the performance gain? how much do they cost? What rims do I need?

See... I'm a noob :(
 
Brand of foams is all about preferrence. The main thing that foams have over rubber is traction. Basically point and shoot type of deal. Foams can go for $10 a pair and up. If you wish to glue your own foams, it can be done but you'll need a tire truer to get it to the proper diameter.

Foams come in a front or rear compound. Also Shore ratings will let you know what hardness the compound is. What car are you using and what type of surface? (dusty, aphalt, greasy asphalt, etc). I'll try to at lest give you a good starting point.
 
I have a duratrax GP Street force 2. I just upgraded the engine to a .18 OS Max.

I run mostly on relatively clean asphalt (low grease)... I'm in florida so the surface can get pretty hot.

Any pointers you can give would be great. What type of tire truer should I get? etc.

:cheers:
Alex
 
UCPLAYS said:
I have a duratrax GP Street force 2. I just upgraded the engine to a .18 OS Max.

I run mostly on relatively clean asphalt (low grease)... I'm in florida so the surface can get pretty hot.

Any pointers you can give would be great. What type of tire truer should I get? etc.

:cheers:
Alex
Click to expand...
On a hot day of 85+ degree weateher, 42/40 or 40/37. If it 's a little chilly in the morning, 37 all around or 37/35. I use the HUDY tire truer, manual version. The automatic is almost double the cost of just cranking the arbor back and forth yourself.

When you true your tires, don't do it in one pass. Do it with at least 3 passes to the desired diameter.
 
sweet thanks :) Just ran my new foams... wow... that's all I can say... it's not even close, they blow rubber tires away in performance!
 

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