Modme

iTrader: (17)

Great stuff. Finally, someone that can analyze the value of a mod scientifically instead of a butt dyno.

JonnyOzero3

This is epic. We absolutely need more folks putting brains behind their mods.

Nicely done.

G37Sam

I can't believe I missed this thread!

I will definitely be giving this a read later on tonight

betterdayz

iTrader: (2)

Wow this was very interesting!! Thanks!!!!

slartibartfast

iTrader: (7)

Dredged from the dead for clarity.

Brake mods made to reduce rotating inertia are usually contraindicated for "better" braking performance. Rotors are heat sinks; more mass = more heat capacity for a given metallurgy. More mass = more hard braking before reaching thermal limit and experiencing fade.

I had direct experience with this during my Sentra SE-R days. Stock brakes faded at track days rather quickly no matter what pads and brake fluid I used. Upgrading to NX2000 brakes (slightly larger diameter, significantly thicker) was the cat's meow. No fade. Ever. We did the same upgrade to our SE-R LeMons racer and couldn't fade them under enduro racing conditions.

The quantification of energy changes is pretty neat thing to see. Good work, OP.

bos3ayd

thanks for the work, interesting anf helpful info

slartibartfast

iTrader: (7)

Oh, and the engine pulleys may not reduce rotating inertia but they're usually larger in diameter to slow their rotational velocity which is supposed to reduce engine load, thus allowing more power to go to the drive wheels. Also, they slightly reduce weight at the front of the car (except Porsches, Corvairs, old VW's and Trabants) which almost always improves weight balance for improve cornering performance.