SPRING RATES & DROPS: ALL IN ONE THREAD!!

wildcatgoal

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Can add Steeda Dual Rate comp springs...

Rates at curb:
Front 350lbs
Rear 1200lbs

Lowers ride height .75 at all four corners
 

wildcatgoal

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Had the steeda progressive springs yesterday and very happy with the drop and stance of the car. I didn't see much difference in ride quality over my stock pp springs. I thought it was about as stiff as the stock ones or may be tad bit little less stiff.. Handling defintely improved

[MENTION=7748]tj@steeda[/MENTION] [MENTION=25806]SteedaTech[/MENTION]
 

BmacIL

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Can add Steeda Dual Rate comp springs...

Rates at curb:
Front 350lbs
Rear 1200lbs

Lowers ride height .75 at all four corners
I will add to the ride frequency chart.
 

dsp4848

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Can add Steeda Dual Rate comp springs...

Rates at curb:
Front 350lbs
Rear 1200lbs

Lowers ride height .75 at all four corners
Added to spring spreadsheet!
 

Bobsp12

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Does anybody know the stock total suspension travel distance for the front and rear of a GTPP?
Our legal requirement for lowered cars is to retain two thirds of original travel and to have 100mm clearance to the ground from any part of the car.
 

THE_AHJ

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Peeps, there were a couple of users mentioning that Eibach Pro-Kit is Linear and the spreadsheet shows them as Progressive, but I just got off the phone with Eibach and part# 35145.140, which is their Pro-Kit is indeed Linear and not Progressive. The info on the site is incorrect, he mentioned they went back to Linear so I'm assuming they might have been Progressive before :shrug: . The rates are correct as shown on the spreadsheet though :thumbsup:
 

wildcatgoal

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I just installed a set of the Eibach Pro-Kits for a forum member last weekend and they looked linear to me.
 

dsp4848

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Peeps, there were a couple of users mentioning that Eibach Pro-Kit is Linear and the spreadsheet shows them as Progressive, but I just got off the phone with Eibach and part# 35145.140, which is their Pro-Kit is indeed Linear and not Progressive. The info on the site is incorrect, he mentioned they went back to Linear so I'm assuming they might have been Progressive before :shrug: . The rates are correct as shown on the spreadsheet though :thumbsup:
Yeah you're the second person I can recall that called Eibach and had them say that the Pro's were linear - even though just about everything else says they're progressive. That's really odd.

I just installed a set of the Eibach Pro-Kits for a forum member last weekend and they looked linear to me.
They definitely do look linear - nothing like a progressive spring (think Sportlines). I noticed this when I installed mine last year, but just took everyone's (including Eibach) word for it that they were progressive. Oh well, they're good springs and aren't coming out of my car.
 

BmacIL

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So whats the most minimal drop with the best ride quality?
BMR SP089 & SP082. 7/8" front and 1/2" rear drop. The GT350 (non R) springs drop 3/8" all around but are firmer than stock by quite a bit.
 

Teezlr

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BMR SP089 & SP082. 7/8" front and 1/2" rear drop. The GT350 (non R) springs drop 3/8" all around but are firmer than stock by quite a bit.
Great, I look into them. Thanks
 

GTP

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I wish the vendors would publish the spring rates at their product pages, and I wish the spreadsheet included all the vendor part numbers!

At least the OP could fix the latter ... :shrug:
 

markmurfie

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Yeah you're the second person I can recall that called Eibach and had them say that the Pro's were linear - even though just about everything else says they're progressive. That's really odd.



They definitely do look linear - nothing like a progressive spring (think Sportlines). I noticed this when I installed mine last year, but just took everyone's (including Eibach) word for it that they were progressive. Oh well, they're good springs and aren't coming out of my car.
http://eibach.com/america/en/eibach-news/ford-mustang-2015-plus-pro-kit

Note: PRO-KIT spring rates are measured as a system of the front or rear suspension. 10mm of bump-stop deflection is included in the final rate of the system.

Its a proprietary design progressive setup. The bump stops included with the springs are not just so you won't bottom out on the stock ones.

If you cut the bumpstops then the springs are probably linear at 200 front 800 rear. Basically the same as the steeda linear springs.

The sportlines are progressive springs and use 10mm of the bumpstops.
Why the eibach rep didn't explain this over the phone I don't know.
 

BmacIL

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