Part review: JUN 4.6kg Lightweight Flywheel B6
JUN AUTO - Lightweight Flywheel for B6-ZE
Part#: 2001M-Z001
Weight: 4.6 kg / 10.14 lbs (std: 8.0 kg / 17.63 lbs)
Material: forged chrome-molybdenum steel
Website: http://www.junauto.co.jp/products/fl.../index.en.html
Driving impression after 8k kms / 5k miles
This review will cover the Jun flywheel but most of it would apply to any lightweight flywheel regardless of brand.
- Acceleration response is slightly increased, accentuating the revvy nature of the B6 engine.
- The more noticeable difference can be felt in the deceleration as the flywheel makes great use of engine braking.
- On the street this results in sometimes finding yourself in the correct gear but losing speed down a hill.
- Rev matching/heel-n-toe become noticeably easier to execute.
- Taking your foot completely off the gas suddenly will cause the car to jerk rather violently as it decelerates rapidly. You will learn to drive smoother with finer inputs to avoid this.
- When all conditions outside and inside are quiet you can hear the engine sing a new song as the flywheel rotates. You may or may not like it
- The lighter the flywheel the less street friendly it will be (consider the factors above).
- Maruha recommend a 5.0kg one. I would also recommend anything between 5.0kg - 5.5kg (11lbs - 12lbs), and not less than 4.5kg (10lbs) unless it is a race car.
Recommendation:
Only if you love revving, and you love NA, and you are taking out your gearbox/clutch anyway. If you have a B6 and 4.3 gear ratio, this should tempt you even more (buy any reputable brand).
Reference video: Revving in neutral std 8.0kg flywheel vs 5.0kg one
https://www.youtube.com/watch?v=eaJNx7yWmk4
Reply With Quote