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Old 01-06-2022, 09:26 PM   #15
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RCE Yellows on stock struts were pretty good for me.
I might go down this path yet. Do they drop the car much?

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Old 01-06-2022, 10:22 PM   #16
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RCE Yellows advertise a 20mm drop, so about .8 inches.
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Old 01-06-2022, 11:55 PM   #17
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Give RCE Yellows + Camber plates on stock strut's or Bilstein. Might need some small spacers but for the love of god don't do BC coils and 8K springs. Don't forget rear LCA's to dial out some of the rear camber.
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Old 01-07-2022, 01:40 AM   #18
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Originally Posted by NoHaveMSG View Post
We are saying get something like Yellows + B6/B8's for what you want. Maybe go with a different wheel spec to make sure you have enough clearance.

17X9 +38 57DR's will be tight with a 245 tire and I can't guarantee it would fit. With this same setup with H&R springs on stock struts I had around a 1/4 inch of clearance between the tire and spring perch. You could always run a 5mm spacer to get more clearance.

Here is a thread comparing Yellows + B6/B8's with Flex A's.

https://www.ft86club.com/forums/show....php?p=3412277
You’re sure 245/40 would be a tight fit it seems a lot of people run that exact tire size and don’t run into any problems …also would 225/45 be a better fit with the wheels?
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Old 01-07-2022, 01:41 AM   #19
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Give RCE Yellows + Camber plates on stock strut's or Bilstein. Might need some small spacers but for the love of god don't do BC coils and 8K springs. Don't forget rear LCA's to dial out some of the rear camber.
Why not BC coils and 8k springs? I have no knowledge in spring rate so please inform me
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Old 01-07-2022, 01:48 AM   #20
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Originally Posted by blakkoutdarko View Post
Why not BC coils and 8k springs? I have no knowledge in spring rate so please inform me
As others mentioned those spring rates are way to stiff. Honestly if your dead set on coils look at RCE's SS1s. I run these on my car. Soft for street and stiff for track and can handle 200tw tires np. Low+ those stiff springs are just asking for a terrible ride much worse than stock.

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Old 01-07-2022, 02:54 AM   #21
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Originally Posted by blakkoutdarko View Post
Why not BC coils and 8k springs? I have no knowledge in spring rate so please inform me
Here goes I don't mean to be patronising but I wasn't sure what you meant when you said you had no knowledge about spring rates) but here are the main points.

*When a car corners, the weight of the car shifts to the outside wheels, which causes body roll as the outside springs compress from the extra load.

*Racecars take corners a lot faster which results in more weight transfer so they need a higher spring rate so that the springs don't compress too much.

*But... stiff springs result in a bumpy ride because they don't compress easily, so they don't compress enough to absorb bumps, as a result the entire car (and you and your passenger) will move up and down with the bumps in the road.

* Racetracks are smooth, and racing drivers don't care about a bumpy ride, but you do.

* an 8K spring compresses 1mm with every extra 8 kg of weight. OEM Rate is something like 4.5K. (anyone?)

* A street/track compromise is around 6 or 7K and you will feel a noticeable increase in bumpiness.

Side point: you should find a stiffly sprung twin in your area and ask for a ride, your mind will be made up once and for all.










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Old 01-07-2022, 07:34 AM   #22
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Iím running stock suspension but plan to get BC Racing coils (Extreme Low) with the swift spring upgrade and Rays Gram Lights 57DR 17x9 38+ with 245/240 Falken Azenis FK510. For the coils is 8k spring rate good or should I go higher/lower? I already know I might need extended lugs and spacers for the rear. Would dropping the car 1.5-2Ē be overkill and cause rubbing?
Presumably you mean 245/40-17 tire size, yes?

That wheel size/offset will work fine with lowering springs. FWIW I've run 245/40-17 on 17x9 +35 and 17x9 +37 wheels, and also 235/40-17 on 17x9 +40 wheels, with ~1.25" lower Swift lowering springs and Bilstein B8s (B6s would be fine as well). Works great on street and at the track.

YOu don't need wheel spacers and you don't need rear lower control arms. You will want to get an alignment after lowering the car of course. You will probably also want to get some front front camber. I'm running Raceseng cascam plates. You might get by with offset upper front strut mounts (Pedders?).

Regarding spring rates, stock are in the neighborhood of 3kg/mm. Swift Sport and RCE Yellow springs are quite a bit stiffer, but nowhere near 8kg/mm. Either will work great with Bilstein B6 and give a firmer ride but nicer ride quality (less harsh) than stock.
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Old 01-07-2022, 11:46 AM   #23
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Originally Posted by blakkoutdarko View Post
You’re sure 245/40 would be a tight fit it seems a lot of people run that exact tire size and don’t run into any problems …also would 225/45 be a better fit with the wheels?
225 would be stretched on a 9" wheel. 245 did clear on my car but some "245's" are wider than others. That is why I said I can not guarantee it will fit. Chances are it will, but it is pretty tight.

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Why not BC coils and 8k springs? I have no knowledge in spring rate so please inform me
BC is trash, 8K is way too stiff. For a little more then what BC's cost you can get quality with a proper spring rate. A lot of people buy BC because they are comparatively cheap.

If you really want coils, ST which is made by KW. Or Flex A's, CSG spec or standard. Or RCE SS1's.
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Old 01-07-2022, 01:46 PM   #24
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Originally Posted by Purist View Post
I might go down this path yet. Do they drop the car much?

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I got about the 20mm advertised drop when I had them. I was also running 245/40R17s on 17X9et35 wheels.
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Old 01-07-2022, 04:25 PM   #25
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I run Bilstein B8s and RSR superdown springs. The springs were the previous owners choice, but the struts were my addition. If going with lowering springs, you will want aftermarket gas struts to accommodate a drop lower than 1". Our stock struts are not built for springs too aggressive. My wheels are staggered at 18x8.5 +38 up front and 18x9.5 +45 in the rear. Tires are 245/35 and 255/35 without rubbing. I'm mounting Gram Lights next week that are 18x8.5 +45 all around. I will be adding whiteline camber bolts to add some negative camber if needed, but the offset and width should make it flush.
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Old 01-07-2022, 05:45 PM   #26
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I run Bilstein B8s and RSR superdown springs. The springs were the previous owners choice, but the struts were my addition. If going with lowering springs, you will want aftermarket gas struts to accommodate a drop lower than 1"..
This^^^ x1000

With Swift BRZ Sport springs lowered my car about 36mm, and the stock front struts had no bump travel left, partly due to the camber plates I have which sacrifice an additional ~15mm bump travel. The ride on the street was horrendous, every little bump was an EVENT! With Bilstein B8s (B6s should be same) there's plenty of bump travel, really transformed the car.

Stock struts should be OK with more modest lowering (RCE springs = -20mm ish) and no camber plates. If you want to run lower than that and/or run camber plates, get the Bilsteins. If you have the coin get them anyway, they're a big improvement over stock!
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Old 01-08-2022, 03:31 PM   #27
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225 would be stretched on a 9" wheel. 245 did clear on my car but some "245's" are wider than others. That is why I said I can not guarantee it will fit. Chances are it will, but it is pretty tight.



BC is trash, 8K is way too stiff. For a little more then what BC's cost you can get quality with a proper spring rate. A lot of people buy BC because they are comparatively cheap.

If you really want coils, ST which is made by KW. Or Flex A's, CSG spec or standard. Or RCE SS1's.
Yeah Iíve came to the conclusion that Iím gonna buy RCE SS1s with the rear shock mounts. Would I need extended studs/open ended lugs?
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Old 01-08-2022, 04:44 PM   #28
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Yeah Iíve came to the conclusion that Iím gonna buy RCE SS1s with the rear shock mounts. Would I need extended studs/open ended lugs?
no should not.
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