S2000 weight reduction guide

[Todxxx]

Ive been collecting weights for a while now and stockpiled them into the following table to help others with their weight reduction endeavours.
Don't believe the weights you read on the internet haha


1. removed stock ignition cover
= -310g

2. removed bonnet prop
= -390g

3. removed under hood insulation mat
= -650g

4. replaced stock intake with js racing intake
stock intake = 3.3kg
js racing intake = 2 .3kg

= -1kg

5. modified stock header
stock with heat shields = 11.3kg
stock with heat shields removed = 9.3kg
stock with tabs removed = 8.4
stock heat wrapped = 9kg

= -2.3kg

6. replaced stock cat with TP
stock cat = 5.3kg
stock cat with heat shields removed = 3.9kg
invidia 70mm TP = 1.7kg

= -3.6kg

7. replaced stock exhaust with titanium single
stock exhaust (catback) = 23kg
byp 70mm single titanium exhaust (catback) = 4.2kg

= -18.8kg

8. removed air pump assembly
= -3.8kg

9. removed A/C system
= -12.5kg

10. removed horn assembly
= -185g

11. removed window/headlight washer system
washer bottle and motors = 1.51kg
washer bottle capacity = 5L/5kg
associated tubing = 390g
headlight washer pieces = 200g

= -7.1kg

12. removed stock sized battery and replaced with lightweight battery
stock battery = 12.1kg
lightweight battery = 7.1kg

= -5kg

13. replaced stock steering wheel with momo/quick release and hub
stock steering wheel = 2.8kg
momo+QR+hub = 1.8kg

= -1kg

14. replaced driver side seat with bride zeta 3 type L fixed back
stock seat + rail = 15.3kg
bride zeta 3 typle L + rail = 11.3kg

= -4kg

15. remove passenger side seat (track day only)
= -15.3kg

17. removed sun visors
= -480g

18. removed wind stopper
= -480g

19. removed padding/insulation/sound deadening under carpet
= -4.3kg

20. removed passenger airbag + bracket
= -3.5kg

21. removed stereo system
alpine headunit = 1.5kg
stock AP1 speakers = 1.2kg
ipod + cords = 200g

= -2.9kg

22. replaced soft top strikers with RSG race brackets
Stock soft top strikers/catchers = 1.3kg
RSG race brackets = 225g

= -1.1kg

23. stripped boot area
spare tyre = 11kg
tool kit and log book = 3kg
rear trim pieces = 2.7kg
sound deadening = 1kg

= -17.7kg

24. fitted hardtop and removed soft top
stock AP1 soft top + motors = 30.6kg
forbidden frp hard top w/ 2 piece rear brackets = 13.8kg

= -16.8kg

25. replaced stock bonnet with carbon vented bonnet
stock bonnet = 7.6kg
carbon vented bonnet w/ aerocatch latches = 7.5kg
removed factory latch system = 495g

= -610g

26. replaced stock side mirrors with APR GT mirrors
stock mirrors = 2.5kg
APR GT mirrors = 770g

= -1.8kg

28. replaced stock AP1 wheels with 17x9 ce28 and added tpms sensors
stock AP1 rims and RE002 tyres = total 72.2kg
ce28 with 245 RS3 tyres + tpms = total 69.6kg

= -2.6kg

29. replaced stock lower ball joint with camber offset ball joint
stock ball joint = 1.5kg
hardrace camber joints = 1.2kg

= -300g

total
=113.2kg (everyday driving)
=128.5kg (track days)

[Todxxx]

updated the OP.
another 8.6kg taken form the car. total weight reduction is now up to 97.1kg :D

[Todxxx]

Recently stripped out AP1 soft top assembly with a few interior trim pieces and insulation etc
30.6kg
Forbidden frp hardtop with rsg race brackets is 13.8kg

So 16.8kg saved

Also replaced standard sized battery with a pc680 and saved another 5kg

Brings my total weight savings up to 98.5kg (street trim) and 113.8kg (race trim)

[CRXONE]

This is the best thread ever.

Mate well done on sharing what you've done. These things take time and cuts out a lot of time for us.
You know how much weight contributes to acceleration so losing 100kg is massive.
Did you take out the stereo? You can swap the glass in our door windows to perspex, it looks very similar but obviously another 5kg or so lighter.

[Todxxx]

This is the best thread ever.

Mate well done on sharing what you've done. These things take time and cuts out a lot of time for us.
You know how much weight contributes to acceleration so losing 100kg is massive.
Did you take out the stereo? You can swap the glass in our door windows to perspex, it looks very similar but obviously another 5kg or so lighter.
thanks man
i just did it cause there's a few threads on it on s2ki on this topic and so many discrepancies and estimations of weights etc
i dont personally know how much difference it makes but im sure i could find the formula and do the calculations

i still have stereo and glass man. im building the car to clubsprint specs so the glass wont be replaced but definitely a lot of weight to be saved there

[curtis265]

Assuming you are changing from mass 1300 kg to 1200kg

you will get an 8.3% increase in acceleration

the real benefit is when you don't heat your brakes and wear your tyres as much

[Stabo]

How much do you weigh mate? If you're a big unit like 120kgs, you could go on a diet and drop another 60kgs! :)

[Todxxx]

Haha I'm 6ft 4 and 82kgs. I'm lanky as ****.

I race the car so any weight loss is good. I could lose a lot more from the car but Im not going crazy/want a full interior still etc

[Todxxx]

Assuming you are changing from mass 1300 kg to 1200kg

you will get an 8.3% increase in acceleration

the real benefit is when you don't heat your brakes and wear your tyres as much
True!
The s2k being NA isn't going to benefit from the acceleration as much but the braking difference helps massively.

[Todxxx]

Just to be clear, I'm not going for the lightest race car here. What I'd like is once I've added stuff like a roll bar, aero, oil cooler etc is to be at the same weight as stock.
Should be fairly achievable with my goals.

[Jaaaykx]

You are my inspiration Todd.

[Todxxx]

updated the OP
a lot more weight reduction has taken place
i guess you would call this stage 2 with the reductions getting a bit more serious now.

stereo system removed (headunit, speakers and ipod) = 2.9kg
passenger airbag and bracket = 3.5kg

Also couple more things coming up so stay tuned for them too