First of all.
Big congratulations to
SweepUSA racer
Mike Haynes for winning the Expert Touring Car (17.5 open ESC) class at the recent Snowbirds. Mike got better and faster each of the four qualifying rounds to eventually take the TQ position in the 4th round from some very, very, very fast and consistent racers. Although the spec tire was the Jaco Blue, this race shows how Mike can methodically adapt his setup to increase performance.
Originally Posted by
Lees52
Team B&B
When you say you use stiff oil and springs with a soft insert how stiff do you go?
Can you give us an example?
E.g. Tamiya 2 hole 50 weight with blue spring?
It is impossible to use someone else's setup for your driving style, track conditions, etc. Both of our XRAY T3 have 2 hole in front and 3 hole in rear. We vary from XRAY 500cst to 700cst. For example, Paul Lemieux XRAY uses 3 hole all the way around. He varies the oil front to rear.
Also, different manufactures holes in the piston are different sizes. The disc to shock body clearing causing blow by is different.
We use zero rebound in our shocks with a flat bladder up top. We use to use the Tamiya black bladders, but now XRAY has the similar.
Also, the Sweep tire/insert combination also acts as a shock/spring. Therefore, all the different combinations come into play. Lots of testing, luck, and more testing.
Originally Posted by
Green Machine!
Thank you!!! This must be the most thorough answere to any question here on RC Tech. (and probabally the most drawn out question for that matter
) I do have one more though
The EXP inserts. They offer soft, medium, and light weight. Is the light weight like a "super soft" or something or ? Does the light weight give "the lowest air pressure possible" tire response?
The light blue inserts are actually a firm sponge type material. It is light weight and is not affected by temperature and humidity. It is wide to give sidewall support and thin to give more air gap. We like it because it gives the tire the first few millimeters of compression a soft ride, then stiffens when pressed hard under braking. The wide insert gives the cornering support.
... and all this changes between 1st run tires (where there is lot of rubber to add more stiffening) to 6 run tires which are thin.