Let's be clear:  Racers sets are not
 Technic sets.  Racers is a line of sets that began in 2001 and 
continued forward from there.  These sets, not surprisingly, have a
 racing theme and tend to be play oriented sets targeted toward younger 
builders.  The sets tend to build with studded LEGO
® 
System parts but some of the models, especially in the early years 
(2002-2007), were made entirely of Technic parts.  The very first 
of these, the 
8461 Williams F1 Racer, is nearly identical to the 
8458
 Silver Champion of 2 years before and therefore can be pretty safely 
categorized as a Technic set even though it said Racers on the 
box.  The 
8674 Ferrari F1 Racer is 
similarly full featured, but the other models shown are much less 
so.  I chose the 8 Racers models shown here because I thought they 
fit in well with the Technic theme and are made of Technic parts, but 
they generally have much less functionality than a bespoke Technic 
set.  Some have nothing more than steering.  If one were to 
look through the entire Racers line one would find many other sets which 
use partially or mostly Technic parts, but I chose these 8 as a 
representative list of those that blur the line between Technic and 
Racers.
Most of these sets make heavy use of stickers for their final look, but 
unfortunately the quality of these stickers degrades heavily over time 
leaving only a sticky mess.  These sets all use a combination of 
curved panels and flexible axles to achieve their streamlined 
look.  Many of these part exist in unusual colors in these sets and
 are available nowhere else.