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FWD-3SGTE
11-03-2010, 05:38 AM
I'm looking for a favor. If someone with a stock height 5th gen celica, preferably coupe but hatch might be the same, could measure from a level surface to each of the 4 jack points under the rocker. The car needs to have 17's with a 40 series tire. I'm curious as to how low my car is from stock with the coilovers and need to get it back to it's correct rake stance.

Much appreciates, thanks :)

celica9303
11-03-2010, 05:41 AM
Ill see what I can do. Ill be working on it all day tommorrow(today now)

FWD-3SGTE
11-04-2010, 07:32 AM
Ill see what I can do. Ill be working on it all day tommorrow(today now)

Fantastic! Just remember a level surface is a must, concrete slab or similiar. Thanks!

Atticus
11-05-2010, 06:37 PM
I'll take the measurements when I get a chance today and post it up if anyone hasn't. I would have it for you now but I am parked on gravel.

KoreanJoey
11-06-2010, 09:26 AM
series is a ratio of the width. 40% of the width. So... really an arbitrary number without knowing the tire width.

FWD-3SGTE
11-08-2010, 08:40 AM
series is a ratio of the width. 40% of the width. So... really an arbitrary number without knowing the tire width.

I'm not sure what you mean Joey, you've caught me off guard :p

The 40 series I'm talking about is the tire's side wall height, I don't have a concern for width. But, to throw it out there, I am running a 215/40 tire, results with similiar tires would be even better :)

METDeath
11-08-2010, 10:35 AM
Yeah, what he's saying is that the 40 part of the tire size, in this case 215/40/17 is a percentage, so you have 215 (mm, I think is what it's supposed to be, however some manufacturer's tires of the same "size" are physically larger, however that's another thread altogether) wide tires where the sidewall is 40% of the width of the tire (86) and is designed for a 17 inch wheel. So just saying 40 series could apply a 185/40/17 (74) a 205/40/17 (82) or even a 225/40/17 (90), thus the 40 is equal to different amounts.

Galcobar
11-08-2010, 10:06 PM
That percentage relationship, which is why the middle number in a tire size is actually called the "aspect ratio," is why as your width goes up the aspect ratio should go down to maintain a stock overall diametre, which is what determines ride height.

215/40-17 will give you overall diametre of 23.77" or 604 mm. The stock overall diametre is 23.47" or 596 mm. A 205/40-17 is closer at 23.46."

However, there are caveats to that: each manufacturer's tire will produce slightly different overall diametres, even in the same technical sizes. Factors such as sidewall stiffness (a soft sidewall will bow, shortening the tire height) and tread design come into play, so it's best if you're really concerned about matching stock to check the manufacturer's website. On top of that, tire wear naturally reduces overall diametre, so take that into account.

Murgatroy
11-10-2010, 08:16 PM
The other thing you will run into, is outside of a few folks on the site, myself and METDeath come to mind, no one runs a 215/40/17. The most common size is a 205/40/17.

And Marshall or myself will do you no good measuring, as we both have modified suspensions.

KoreanJoey
11-11-2010, 01:27 AM
Pfft, 245/35R17

FWD-3SGTE
11-13-2010, 01:29 AM
Yeah, I know. 205 will be fine too, I just need it close.

bzdweezy
11-13-2010, 08:30 AM
Add me to the list Murg i'm runnin 215/40/17 on my 7th gen:cheesy:

Galcobar
11-14-2010, 09:46 AM
Something to keep in mind is that most people who are running +3-inch wheels will have modified their suspensions. If you want to know what stock ride height is, get someone with stock suspension and wheels to measure it. Any variances in tire/wheel combinations can be dealt with via a little math. For that matter, if you're running 205/40-17, there's probably no math needed.

FWD-3SGTE
11-20-2010, 06:16 AM
Something to keep in mind is that most people who are running +3-inch wheels will have modified their suspensions. If you want to know what stock ride height is, get someone with stock suspension and wheels to measure it. Any variances in tire/wheel combinations can be dealt with via a little math. For that matter, if you're running 205/40-17, there's probably no math needed.
Hmm, don't know why I didn't think of that. Thanks Galco :)

To anyone one with a stock ride height 5th gen coupe, measurements from rocker panel jack points to level ground would be greatfull!

METDeath
03-20-2011, 06:06 PM
Pfft, 245/35R17

I for some reason just saw this... Joey, are you running that on a 17x7 or 17x8? and what offset?

Yes, I know, zombie thread, deal with it.

Eric Barrera
03-21-2011, 12:57 AM
I just read that too? wtf?

KoreanJoey
03-21-2011, 05:21 PM
17x9

KoreanJoey
03-21-2011, 05:24 PM
http://www.rocketeerperformance.com/catalog/images/TeamDynamics/TD17x9_d.jpg

METDeath
03-21-2011, 11:08 PM
Ah shit son... 17x9? damn... don't suppose those fit on the coupe in the back do they? I've got GTS fenders for the front lined up, but the back I'm kind stuck with the narrow body.

KoreanJoey
03-21-2011, 11:24 PM
They don't really. They sit pretty flush I guess. Could probably roll them enough to get enough suspension travel. *shrug*

METDeath
03-22-2011, 01:27 AM
Do you have a spacer in the back?

KoreanJoey
03-22-2011, 04:09 AM
I do/did. 25mm.

METDeath
03-23-2011, 01:02 AM
What offset and where did you buy tires that were decent performing in that size, I've looked online and didn't see much. (I initially assumed you stuffed them onto a 17x8.)

KoreanJoey
03-24-2011, 05:37 AM
Not that many available for street tires.

Looks like 24540R17s are a lot easier to come by.

KoreanJoey
03-24-2011, 05:38 AM
Looks like just the Toyo R1Rs

85gtsblackman
03-24-2011, 05:39 AM
im going to go with a 235/40/17

darkness sports 245's