Questions:

1) For DRAG racing is it better (more efficent & good enough) to go with the lightest rotor/pad combo and spend money highend pads (carbotech, cobalt)?


2) The difference between ITR calipers, 11.1" rotors & HF calipers/9" rotors is 28 LBS
How much does that matter on the track in terms of performance?


To keep it simple for arugment sate...lets ssuming the car:
traps at under 130mph
2300-2600 lbs
under 400 whp


I know that the caliper is no considered to be "rotoating mass" but still mass non the less.


FACTS:


Weight for PAIR "Loaded Calipers" :
ITR = 28 lbs
GSR/EX = 18 lbs
DX/LX = 15 lbs
HF = 13 lbs
*note all are different in pad suraface area & piston size



Weight for PAIR of front rotors:
Prelude 11.1" rotors = 27 lbs
GSR/EX 10.3" rotors = 22 lbs
DX/LX 9.4" rotors = 20 lbs
HF 9" rotors = 14 lbs



Weight of front calipers & rotors:
ITR calipers + 11.1" = 55 lbs
GSR calipers + 10.3" = 40 lbs
DX/LX calipers + 9.4" = 35 lbs
HF calipers + 9" = 27 lbs
ITR calipers + 10.3" =50lbs *hybrid combo



..... Thoughts?

 

ttt

 

I've seen people change the rear disc brakes to drums.

 

Either way, wouldnt you want more weight up front exactly around Tire Area?..

 

It's always in your best interest to take weight off a drag car when you can. If you are lucky enough to get below a minimum weight, you can put it back exactly where you can use it to your advantage. If you don't run in a class where there is a minimum weight, then that's badass. The lighter you make it, the faster it'll go.

If there was something I could do to lose 28 lbs out of a car, I'd do it.

 

on top of the drive tires, not part of the suspension/wheel assembly

 

I've always thought of smaller/lighter rotors like getting lighter rims or lighter flywheel.

 

imo less rotational mass would be more beneficial

 

I think its always wise to build the car as light as possible, so if you need to add weight to be legal for certain classes, you can add it in places that would benifit you, i.e. corner weighting etc.

If its not going to take much effoert sourcing the smaller brakes, then i'd say go with them