EK9 factory weight reduction


nfspeedy

nfspeedy

EK9 addicted
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Jul 11, 2013
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356
Car(s)
1996 Civic VTI EK4, 1998 Civic Type R EK9, 2020 Honda e
I wondered what parts on the EK9 are lightweight compared to a EK4 SiR.
Something I found out on the list below. Maybe you can tell me more of your knowledge :)

- No sound deadending tar (I didnt have any on my EK9 so correct me if Im wrong!)
- No tailgate breake light (-192g + wiring)
- No rear wiper and washer incl. pump, motor, hoses, pipes and clips (-1280g)
- No cargo bay light (-24g + wiring)
- No parcel shelf (-3400g)
- No 3d "Civic" and "SiR" badge on the tail gate (-2g)
- No rear head rests (-1250g)
- Lightweight starter battery (no longer available)
- Lightweight shift linkage (-240g)
- Lightweight exhaust valve springs (2 EK9/DC2-R ex. valve springs are 17g, 1 single EK4 ex. valve spring is 40g) (-184g)
- Lightweight exhaust manifold (-1100g)
- Lightweight exhaust pipe A (-950g)
- Lightweight catalytic converter (-900g)
- Lightweight rims (-400g each)
- Lightweight rear disc break rotor (-80g each)
 
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NON-ABS Option, As far as I'm aware all SiR's came standard with ABS, maybe someone can prove otherwise?
No-sunroof option

Did they come with a piece of wood/cardboard cover the spare wheel? And does the carpet have less sound deadening attached I wonder?

I wonder for the EK9's did they remove the baffles from the fuel tank, I know in the JDM DC2's they did, I confirmed this with the excessive sound of 'fuel splash' in my DC2 compared to previous my SiR. Pretty hardcore lol.
 
The fuel tank is exact the same part number and the carpet weight is also the same weight (3150g)
Thanks for your advise :nice:
 
IIRC EK9 have thinner windscreen, light weight crash bars (optional?). My EK9 did have parcel shelf, but it's different from other EKs, it doesn't have the strings that lift it up when you open boot.
 
No windscreen is the exact same part number. I have heared about that too. Maybe the parcel shelf was an option on the EK9. EK4 SiR have a parcel shelf as standard for sure.
 
Pistons are likely to be heavier.
Same with the rods
Manifold will be the same or at least it's not lightweight lol
They also come with speakers and a radio aswell.
 
You are right. Pistons and rods are heavier! "Lightweight" was meant to be lighter than the equal EK4 SiR part ;-)
Both came with no radio and speakers as standard.
 
You sure? Or you talking about the "race base" version? Pretty sure they had gathers speakers in them? Atleast both of my ek9s have done.
 
I'd imagine the crank is heavier aswell? Although slightly. Same with the block being alittle taller.
Spoiler would obviously be heavier
Brakes will be heavier being bigger aswell.
 
sure. I compare them with vin numbers and if you can not click at it it is not equipped from factory. Options are another thing. I want to figure out what Honda did lighten from factory compared to the standard EK4 SiR.
 
There's a thread on this somewhere, lists most of it.
 
I couldnt find. sorry!
 
I have both a ek9 and a 96 spec siR so I can visually compare things if needed,
Kipper said:
NON-ABS Option, As far as I'm aware all SiR's came standard with ABS, maybe someone can prove otherwise?
No-sunroof option

Did they come with a piece of wood/cardboard cover the spare wheel? And does the carpet have less sound deadening attached I wonder?

I wonder for the EK9's did they remove the baffles from the fuel tank, I know in the JDM DC2's they did, I confirmed this with the excessive sound of 'fuel splash' in my DC2 compared to previous my SiR. Pretty hardcore lol.
Click to expand...

Some siR's are non abs. Mine is and always has been since factory.
The boot board is the same in both iirc

oifovo said:
IIRC EK9 have thinner windscreen, light weight crash bars (optional?). My EK9 did have parcel shelf, but it's different from other EKs, it doesn't have the strings that lift it up when you open boot.
Click to expand...

The front crash bar on my siR is kind of non existent from factory. It's essentially like a light weight ek9 crash bar with out the bar connecting the two ends.

So that's another thing that's lighter on the siR

Also the sir parcel shelf is the same as the option ek9 one instead of the string lift type
 
Also the ek9 rear arb is thicker as is the metal that makes up the "subframe" area so that's more heavier stuff on the ek9.

A average spec ek9 has to beAbout the same or heavier than a average ek4
 
nfspeedy said:
No windscreen is the exact same part number. I have heared about that too. Maybe the parcel shelf was an option on the EK9. EK4 SiR have a parcel shelf as standard for sure.
Click to expand...

Pretty sure the ek9 one is thinner. There is a thread on here somewhere I believe where someone weighed one.
 
Lol rumours are bulldog. again I compared the part numbers! Trust me its the same ;-)
 
Is it true that the front brake rotor's (Discs) are lighter weight on facelift? OEM of course, Heard it in a best motoring/EK9 review video I'm sure
 
same part number (45251-SZ3-000) and same weight (6060g each rotor) on every model year EK9 bro
Mr. Ichishima from Spoon Sports said that the front break rotors had about 10% weight difference from the production rotors. Honda improved this crudeness. Thats the kind of precision work Honda has been doing.
 
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Ah nice one! Makes sense now, Balancing rather than lightening. Also, Flywheel weight difference is one to consider for your list.
 
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