The trials and tribulations of Xer0's Civic Si ownership

Started by Xer0, May 01, 2014, 12:11:04 PM

Xer0

I'll probably do 225/45 on 17x7.5 this go around.  I just need to make sure the rims are light enough; my current ones are at 17 pounds so need the replacements to be in the same range.


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Cookie Monster

RWD > FWD
President of the "I survived the Volvo S80 Thread" Club
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Quote from: 68_427 on November 27, 2016, 07:43:14 AM
Or order from fortune auto and when lyft rider asks why your car feels bumpy you can show them the dyno curve
1 3 5
├┼┤
2 4 R

Xer0

How much do they go for? 


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68_427

Between 150-200.  Too bad they're pretty bland.
Quotewhere were you when automotive dream died
i was sat at home drinking brake fluid when wife ring
'racecar is die'
no


12,000 RPM

Protecctor of the Atmospheric Engine #TheyLiedToUs

Xer0

I was looking around and Tirerack only has them available in 16'  :frown:

Xer0

Looking around some more, here is a what my current cart is leaning towards


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Rich

2003 Mazda Miata 5MT; 2024 Tesla Model 3

68_427

Did you call them to make sure those come in 5 lug?  I've only ever seen 4 lug ones.
Quotewhere were you when automotive dream died
i was sat at home drinking brake fluid when wife ring
'racecar is die'
no


SJ_GTI

Quote from: Xer0 on May 14, 2016, 10:57:37 AM




Yikes, that looks painful.

I have either been really lucky or the wheels I bought are really strong, because so far I have not damaged any wheels since I have owned my car despite the tire being in rubber band territory (255/35R19).

Raza

Quote from: Xer0 on May 14, 2016, 10:57:37 AM
Well, another year, another tire issue.  I was driving home last night and hit a pothole that didn't seem too deep, but was filled up by the rain.  It fucked my rim up.



So now the car is on a donut and looks like shit.  I won't be going aurocrossing tomorrow either but will instead try and pick out some new rims.  Currently running 215/45 on 17x7 rims.  I'll probably move to a slightly wider rim/tire since the skinny look was bothering me, but keep it at 17 inches.



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That happened to me in my Passat. Same deal, filled with rainwater, had no idea how deep it was.
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Quote from: the Teuton on October 05, 2009, 03:53:18 PMIt's impossible to argue with Raza. He wins. Period. End of discussion.

Xer0

Yup, it all sucks.  I'll need to file a claim with the city and see if they will help me recoup anything.

Anyway, new rims/tires ordered.  I got the Kosei K8Rs instead, which I think look better and are slightly lighter at just 16lbs.  Hankook Ventus V2 summer rubber @225/45 on them, so should be a decent improvement over the all seasons I had on now.



After all this, I'm going to invest in a thicker rear sway bar.  The 13 Si has a 21mm front and 18mm rear.  With the 14 and up Si, Honda upgraded it to a 20mm and that is an easy, and cheap, upgrade at just $100.  That'll be my next purchase.  Brake pads after that and possibly full exhaust if I'm feeling up to it.


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12,000 RPM

Are u gonna really feel a difference with 2mm though...

Im def doing the '14 but my rear sway is like 7mm. It's a long paper clip. I'm prob gonna do the 8th gen Si front too
Protecctor of the Atmospheric Engine #TheyLiedToUs

MrH

Quote from: 12,000 RPM on May 17, 2016, 02:09:09 PM
Are u gonna really feel a difference with 2mm though...

Im def doing the '14 but my rear sway is like 7mm. It's a long paper clip. I'm prob gonna do the 8th gen Si front too

Really man?  Torsional stiffness of a solid shaft is directly correlated to the diameter^4.

18^4 = 104k
20^4 = 160k

160/104 = 1.53

All else being equal, it's 53% stiffer...

I'm gonna need some transcript on this Mech E degree :lol:  I need to contact some of your profs
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MX793

Quote from: 12,000 RPM on May 17, 2016, 02:09:09 PM
Are u gonna really feel a difference with 2mm though...

Im def doing the '14 but my rear sway is like 7mm. It's a long paper clip. I'm prob gonna do the 8th gen Si front too

Torsional stiffness is a function of diameter ^4.  11% increase in diameter is a 50% increase in rigidity.
Needs more Jiggawatts

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CaminoRacer

Hey 12k, torsion stiffness of a sway bar is equal to the diameter^4, so it's actually a 50% increase in stiffness.
1969 El Camino, 2017 Bolt EV, 2021 Tesla Model 3 Performance

MrH

2023 Ford Lightning Lariat ER
2019 Acura RDX SH-AWD
2023 BRZ Limited

Previous: '02 Mazda Protege5, '08 Mazda Miata, '05 Toyota Tacoma, '09 Honda Element, '13 Subaru BRZ, '14 Hyundai Genesis R-Spec 5.0, '15 Toyota 4Runner SR5, '18 Honda Accord EX-L 2.0t, '01 Honda S2000, '20 Subaru Outback XT, '23 Chevy Bolt EUV

SJ_GTI

Man, you enginerds are tough on each other. No wonder CarSPIN is so brutal.  :lol:

CaminoRacer

#138
Percent increase in stiffness is just a number - what really matters is what change is necessary to actually notice it.
1969 El Camino, 2017 Bolt EV, 2021 Tesla Model 3 Performance

BimmerM3


FlatBlackCaddy

I remember the torsional stiffness being something something to the powers of 4, so that 2mm increase is like a 16 mm increase. Proportionate to the inverse of the differnetial of course.

Xer0

Tires are here!  Unfortunately, I won't have any time to put them on until this weekend.  I'll give the car a wash and take some pictures then.


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Char

Quote from: 565 on December 26, 2012, 09:13:44 AM
... Nissan needs to use these shocks on the GT-R.  It would be like the Incredible Hulk wielding Thor's hammer.... unstoppable.

GoCougs

Quote from: CaminoRacer on May 17, 2016, 03:07:34 PM
Percent increase in stiffness is just a number - what really matters is what change is necessary to actually notice it.

I would agree - just as twice as much horsepower doesn't necessarily double a car's top speed.

MX793

Quote from: GoCougs on May 18, 2016, 12:44:55 AM
I would agree - just as twice as much horsepower doesn't necessarily double a car's top speed.

Considering that power to overcome drag is a function of speed^3, doubling the power of a drag limited car will never double your theoretical drag limited top speed.
Needs more Jiggawatts

2016 Ford Mustang GTPP / 2011 Toyota Rav4 Base AWD / 2014 Kawasaki Ninja 1000 ABS
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SJ_GTI

Quote from: Xer0 on May 17, 2016, 09:33:20 PM
Tires are here!  Unfortunately, I won't have any time to put them on until this weekend.  I'll give the car a wash and take some pictures then.


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Do you mount the tires yourself? Or take them to a mechanic?

Honestly I don't even know how to mount tires by hand. Have only seen it done at the shop my dad works at with on of those machines that pops off and on.

Xer0


Quote from: SJ_GTI on May 18, 2016, 06:22:35 AM
Do you mount the tires yourself? Or take them to a mechanic?

Honestly I don't even know how to mount tires by hand. Have only seen it done at the shop my dad works at with on of those machines that pops off and on.

Do you mean mounting the tire to the rim or putting the finished product on the car?  If it's the former, I have no clue but thankfully tire rack takes care of the mounting and balancing for you. 


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SJ_GTI

Quote from: Xer0 on May 18, 2016, 07:40:43 AM
Do you mean mounting the tire to the rim or putting the finished product on the car?  If it's the former, I have no clue but thankfully tire rack takes care of the mounting and balancing for you. 

I meant the former, I misunderstood your first post (ie: thought you got the tires only, not the tires/wheels combo).  :lol:

Soup DeVille

Quote from: SJ_GTI on May 18, 2016, 06:22:35 AM
Do you mount the tires yourself? Or take them to a mechanic?

Honestly I don't even know how to mount tires by hand. Have only seen it done at the shop my dad works at with on of those machines that pops off and on.

I've only seen it done with truck tires, and the technique used would be hell on any sort of aluminum car wheel.
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Xer0

Oh sorry, got the wheels/tires together.  My dad is going to help me do it and has the power tools on hand to make the process a breeze.  It'll be a fun little weekend thing for us.


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