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post #21 of 108 (permalink) Old 04-16-2015, 09:01 PM
Mikef5000
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I went ahead and purchased the Progress bar. Hopefully there isn't too much of a delay before shipping, since it's still not listed as in stock.
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post #22 of 108 (permalink) Old 04-16-2015, 11:05 PM
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Quote:
Originally Posted by Kennykid2002 View Post
Yeah, I just checked. Its like $21 shipped to me.
Just curious, after seeing the price and specs, why still choose the CorkSport over the progress?
Not that there's anything wrong with that choice, they're both great brands, but just wondering your reasoning behind your choice.
Two reasons: 1) I like the Billet brackets of the CorkSport bar better...and they also have Zerk fittings so you can more easily re-grease. I've had cars with aftermarket sway bars installed before, and having to remove the brackets to re-grease is a pain. The Progess brackets have no fittings to re-grease - if there are they are not shown in the photo's. And 2) I thought that by looking at the numbers (% stiffer than stock), the Progress was stiffer at the softest setting than the CorkSport at it's stiffest? So I thought it might be too stiff for the street. Now looking at what parkinskin posted, looks like I understood the numbers wrong? Confusing.
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post #23 of 108 (permalink) Old 04-17-2015, 01:34 AM Thread Starter
Kennykid2002
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Quote:
Originally Posted by parkinskin View Post
Based on my understanding, Progress measures its numbers differently than JB and CS.

Progress has measured its stiffness as X% as stiff as stock.
JB and CS has measured their stiffness as X% stiffer than stock.

So for Progress, 231% as stiff as stock actually means 131% stiffer than stock and 303% as stiff as stock actually means 203% stiffer than stock.

For James Barone, 155% stiffer than stock actually means 255% as stiff as stock and for Corksport, 130% stiffer than stock actually means 230% as stiff as stock.

Therefore for both JB and CS, respectively, JB is stock multiplied by 2.55 and 3.65, and CS is stock multiplied by 2.3 and 3.2.

Progress's numbers are good, and I can't speak to Racing beat because it's not listed on its website.

But for JB, my understanding is that the numbers should be:

867 lb./in. for less stiff
1241 lb./in. for more stiff

And CS should be:

794 lb./in. for less stiff
1104 lb./in. for more stiff

These numbers make sense to me based on Progress's listing of:

772 lb./in.
1015 lb./in.

The numbers do not vary as wildly among the different brands now.
Yeah, this was what I initially thought, and it does make a lot more sense.
I've changed the first post to reflect these numbers, and changed the wording a bit to make sense of it.
However, I'm still not entirely sure if this is the proper way it's calculated.
Maybe one of the venders like JBR or Corksport forum guys could chime in on it.

Quote:
Originally Posted by Mikef5000 View Post
I went ahead and purchased the Progress bar. Hopefully there isn't too much of a delay before shipping, since it's still not listed as in stock.
Please update us when you receive it!

Quote:
Originally Posted by KennyT View Post
Two reasons: 1) I like the Billet brackets of the CorkSport bar better...and they also have Zerk fittings so you can more easily re-grease. I've had cars with aftermarket sway bars installed before, and having to remove the brackets to re-grease is a pain. The Progess brackets have no fittings to re-grease - if there are they are not shown in the photo's. And 2) I thought that by looking at the numbers (% stiffer than stock), the Progress was stiffer at the softest setting than the CorkSport at it's stiffest? So I thought it might be too stiff for the street. Now looking at what parkinskin posted, looks like I understood the numbers wrong? Confusing.
Makes sense.
The brackets are a good selling point.
And yes, the numbers are quite confusing, due to the wording.

2015 Mazda 3 sGT 6sp // Jet Black Mica
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OEM Aero Kit
CorkSport Plate Relocation Kit
CorkSport Hood Struts
3M Tint 50% Front/5% Rear
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JBR Short Ram Intake
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post #24 of 108 (permalink) Old 04-17-2015, 08:27 AM
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Quote:
Originally Posted by Kennykid2002 View Post
Yeah, this was what I initially thought, and it does make a lot more sense.
I've changed the first post to reflect these numbers, and changed the wording a bit to make sense of it.
However, I'm still not entirely sure if this is the proper way it's calculated.
Maybe one of the venders like JBR or Corksport forum guys could chime in on it.
My reasoning is based on the Corksport sway bar offered for the previous gen.

It is 94% stiffer than stock. In other words, it's almost twice as stiff as stock (1.94 times as stiff.)
It would make no sense to offer an aftermarket sway bar that is less stiff than stock (0.94 times as stiff.)

Progress is good and clear, showing both the relative percentage and the actual stiffness, which mathmatically, is displayed as "as stiff as stock" as opposed to "stiffer than stock." I would suggest other companies to be just as clear, and Racing Beat simply needs to add specs to its website, period.
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post #25 of 108 (permalink) Old 04-17-2015, 03:57 PM
Mikef5000
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Just recieved this email regarding my progressive bar:
"Comments: Thank you for your recent order with us. The item listed below is in-stock and will ship out directly from Progress ASAP. They generally ship within 1 business day. You will be updated with tracking information once it is available from them which usually takes a day or two. This means your item will most likely have shipped before we update your order with tracking."

Sounds good to me! Hopefully that means by next weekend I'll have it, and I can install my road magnet springs and this RSB.
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post #26 of 108 (permalink) Old 04-22-2015, 12:47 AM
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Got my Progress RSB yesterday.
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post #27 of 108 (permalink) Old 04-25-2015, 07:08 PM
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I also recieved my Progress bar. It's comically tiny... At least compared to what I was expecting. Haven't seen the stock one, so what just thinking from past experiences. No complaints at all about it, or the brackets.
I might get it (and my springs) thrown in tomorrow.
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post #28 of 108 (permalink) Old 04-25-2015, 09:12 PM
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I started the process tonight... Installed the rear springs and RSB. Fronts tomorrow morning.
The process was straight forward, but the bolts for the sway bar brackets are baried pretty good. Taking my time, it took an hour and a half.

Anyway, this is the RSB thread, so comparison pictures are attached. The brackets, while not billet, are heavier duty than stock, and aren't a peticularly high stress part, so I'm happy with them. I had grease fittings on my last cars sway bars, and never once in 9 years needed to add grease, so I'm not worried at all.

Assuming the stiffness is as advertised, the Progress bar seems like a very solid unit for the price.
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post #29 of 108 (permalink) Old 05-03-2015, 03:35 PM
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Installed my JBR rsb yesterday. Took 4 grueling hours of trying to fit sockets into small spaces. There is barely any space to do any work without dropping the subframe. The thickness of the new bar didn't help haha.

But all in all, there is a significant difference in body roll, I have it at the softer setting and it handles really well. 9/10

PS: on the passenger's side, above the higher bracket on the sway bar, there was a line with a white top that popped into a small hole. To give myself more space, I pulled it out and set it aside, but may have broken a tab. So now I just ziptied it onto the sway bar instead of popping it back into the hole. Does anyone know what this part it? no pics for reference.
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post #30 of 108 (permalink) Old 06-13-2015, 07:42 PM
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Had my Progress RSB & Tanabe STB mounted today. Just driven it for a few miles, but the steering feels more precise, with no delay. When you turn the wheel, it goes NOW, with none of the delayed understeer of the stock setup. Impressed so far.

Not much to see, but here are a couple pics from the installation:





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