frpp zxm1 springs - Focaljet

**eddiebrock71** · 05-18-2008, 04:26 AM

does anyone know if the springs are progressive? The fronts look specific, but the rears look progressive. However, the rears could be specific once the weight of the car is on the springs.
Does anyone know for sure?
And how much stiffer are they over stock springs?

If the rear springs are progressive, do they ever get softer than the front spring rates?

Thanks

**hommie** · 05-18-2008, 01:24 PM

I am not sure if they are progressive or not. It is just a little stiffer then the stock setup. It is a great kit for a daily driven car. I like mine alot

**Johnny_P** · 05-22-2008, 12:01 AM

I think its a progressive spring, because it soaks up highway bumps easily, but when you push it you feel it firm up

I'll echo that its a great DD setup. I think its a good deal stiffer than stock, but that's just my opinion. I haven't driven other setups to know any difference.

**hommie** · 05-22-2008, 10:59 AM

It is probably not the best setup if you are going to do some track events. However for the street and a few back road corners it is great. I really like how well the kit was put together. You didn't have to reuse anything, it was all new stuff.

**Ted7rns** · 05-22-2008, 12:51 PM

I take you’re talking about the M-5560 *** Springs???

They are stiffer then the OEM and SVT Springs. They are also progressive. But, they work best with the Dynamic Dampers. (M-3000-ZXM or the M18000-ZXM). The springs rate are similar to the springs in the Dynamic Suspension kit (M-3000-ZXM) but are lower a true 1.5”. The Springs rates are F: 120~160 lb/in and R: 160~280 lb/in. Don’t worry that the progress springs because basically you only use the full stiff part of the springs, the lower end is mainly like a tender spring.

This springs/dampers can be used on the street and the track. This is the same setup we use on our Spec Focus Race cars and will handle much better then the SVT kit and will have a lot less understeer.

But these springs do work best with the Multimatic Dampers.

**eddiebrock71** · 05-22-2008, 04:04 PM

I was looking at this setup also.
2006-07 Performance Focus Springs (M-5560-ZXM1) for the 2006+ focus. I like the spring rates, pretty much the steeda sport springs, not the eibach springs sold by steeda. The higher rate rear springs, will help reduce understeer. however was not quite sure about the multimatic shocks/struts
2006-08 Focus Dynamic Damper Kit (M-18000-ZXM1). I have seen these parts together going for $678.

but I like the fact that the 2006-07 Focus Damper Kit (M-18000-ZX3B) is a complete kit, bump stops, and all the little stuff ford says is a one time use.

so i was thinking about the zx3b kit with the zxm1 springs?

How do you think the shocks/struts from the zx3b would hold up with those spring rates? I think they would work since they are set up for a 1.5 inch drop?

and if i did use the multimatic, do they now come with bushings installed in the rear shocks? and what about bump stops.

**Johnny_P** · 05-22-2008, 04:07 PM

The multimatic kit for the 06+ does come with the bushings installed from what I understand.

The shocks, at least in the kit that I got for the 00-05 focus, included inverted front struts. They're SUPER damn beefy, I don't expect ANY problems with them for a long time. Plus I'm pretty sure they should be able to handle a decent drop, just look at the max spring rates they have to deal with in the FRPP kit!

**eddiebrock71** · 05-22-2008, 04:23 PM

I know the multimatics are able to handle the zxm1 springs, they were designed for that. but what about the zx3b struts, they are set up for a 1.5 drop, but not really made for the spring rates of the zxm1 springs.

also, i am not sure on the bump stops, with the multimatic arent the front bumpstops internal, but what would I do for the rear bump stops.

**hommie** · 05-22-2008, 04:28 PM

I have the M-5560-zxm1 springs with the m-18000-zx3b dampers. It works great and you are right it is a complete kit. No need to reuse anything. If you planning on driving you car as a commuter I wouldn't go with the dynamic dampers. I had a set on my SVTF and they did great on the track. However on the street it was really rough and not very comfortable to ride in for long periods of time.

**eddiebrock71** · 05-22-2008, 04:48 PM

I was looking at this setup.
2006-07 Performance Focus Springs (M-5560-ZXM1) for the 2006+ focus. I like the spring rates, pretty much the steeda sport springs, not the eibach springs sold by steeda. The higher rate rear springs, will help reduce understeer. however was not quite sure about the multimatic shocks/struts (M-18000-ZXM1), I know they are good and specific to the ZXM1 springs, but do they come with the rear shock bushings installed or do you have to have some installed like the older multimatic kit. also, since the car will be lower, how is the bumpstop issues resolved. and the damping could be a litte rough for daily driving.
I have seen these parts together going for $678.

However, I like the fact that the 2006-07 Focus Damper Kit (M-18000-ZX3B) is a complete kit, bump stops, and all the little stuff ford says is a one time use.

so i was thinking about the zx3b kit with the zxm1 springs?

How do you think the shocks/struts from the zx3b would hold up with those spring rates? I think they would work since they are set up for a 1.5 inch drop? I have seen where people have used the stock shocks/struts with steeda springs on the 2005 and ealier without problems and the steeda spring rates, and almost identical to the ZXM1 rates. So since the zx3b struts/shocks are better than stock, I figure they would work.

Thanks for your responses.

**Ted7rns** · 05-22-2008, 05:10 PM

All the Dampers sold by FRPP including the older Dynamic Suspension now come with bushing, bumpstops and etc.

The M-18000-ZX3B are Similar to the SVT Dampers. It might not be able to handle the stiffer spring rates.

**Ted7rns** · 05-22-2008, 05:39 PM

I take it you have a 2006+ car. I would get the Dynamic Damper Kit M-18000-ZXM1 and get the M-5560-zxm1 and it will help the understeering.

Don't worry about the Dampers they come with everything you need to install them. By the way this car has the same setup.

This car has the same dampers but the older springs that comes with the M-3000-ZXM kit

**Ted7rns** · 05-22-2008, 05:48 PM

Quote:

Originally Posted by Johnny_P

The shocks, at least in the kit that I got for the 00-05 focus, included inverted front struts. They're SUPER damn beefy, I don't expect ANY problems with them for a long time. Plus I'm pretty sure they should be able to handle a decent drop, just look at the max spring rates they have to deal with in the FRPP kit!

The 2006+ Dampers are not Inverted. It's just a normally bi-tube Strut. But they are still good dampers.

**eddiebrock71** · 05-23-2008, 02:51 AM

anymore pics of the red focus with the dynamic kit, maybe a straight side on shot.

**brads03zx3** · 05-23-2008, 09:30 AM

Typically, the spec focus is lighter than a standard street car, so this kit usually sits slightly lower.

**BOWERSdaAZIAN** · 05-23-2008, 12:09 PM

A little off topic, but it may help those interested in FRPP products.

I have the M-3000-ZXM kit waiting to be installed. Anyone know how different the dampers are between the M-18000-ZX3B, M18000-ZXM1 and the kit i have? I know those are for the 06+ but in terms of "beefyness" or ability to handle shorter/harsher springs.

**eddiebrock71** · 05-23-2008, 01:07 PM

Struts and shocks should be set for the ride height of the springs. However, Ford needs to put out more information on their FRPP products. It is a pain, trying to get specs on their springs, struts and shocks. This is vital information for consumers. For example, the zxm1 states it is race oriented, but that is according to ford specs. a consumer may like the rate of the springs for daily driving, but if ford does not release that information you do not know what you are getting. if i already have a certain spring rate, i can determine if i need stiffer or softer springs. but if a manufacturer never releases specs, you would spend more money trying to find the right set up.

anyways, i believe the zxm1 are set to be more stiff. so the zx3b would be more like a koni adjustable on soft, while the zxm1 would be more like it set to hard.

the zx3b will probably give a softer ride as is soaks up bumps more, while the zxm1 will work to keep tire contact more, which in turn my make a harsher ride. But how harsh depends on your individual taste.

zx3b is about like the svt focus.
zxm1 is going to be more harsher.

**Ted7rns** · 05-23-2008, 01:22 PM

Quote:

Originally Posted by bowersdaazian

A little off topic, but it may help those interested in FRPP products.

I have the M-3000-ZXM kit waiting to be installed. Anyone know how different the dampers are between the M-18000-ZX3B, M18000-ZXM1 and the kit i have? I know those are for the 06+ but in terms of "beefyness" or ability to handle shorter/harsher springs.

The M-3000 are Inverted Mono-Tube Struts made by Multimatic with Tokico Rear Dampers.

The M18000-ZXM1 and ZXM have a regular twin tube strut made by Multimatic with the same Tokico Rears that comes with the M-3000 kit.

The M18000-ZX3B is a similar kit the the SVT Dampers made by Tokico.

I would say all kits will handle a maximum 1.5” drop. The M-3000 and ZXm1 kits can handle stiffer springs then the M18000-ZX3B. The best struts on all of these are the M-3000 because they are inverted Mono-Tube struts. The ZXM's are close to performance to the M-3000, but use a standard twin-tube strut design.

---------------------------------------------
Springs

Dynamic M-3000-ZXM Springs
Drop: 1.25” to 1.40”
F: 111~160 lb/in
R: 100~280 lb/in

M-5560-ZXM and ZXM1
Drop: 1.5””
F: 120~160 lb/in (est)
R: 110~280 lb/in (est)

M-5560-ZX3B (similar to the SVT springs)
Drop: 1.25”
F: 129 lb/in
R: 157 lb/in

**BOWERSdaAZIAN** · 05-23-2008, 01:32 PM

You're the man Ted, appreciate the information!

**eddiebrock71** · 05-23-2008, 03:05 PM

[quote=Ted7rns]I take you’re talking about the M-5560 *** Springs???

They are stiffer then the OEM and SVT Springs. They are also progressive. But, they work best with the Dynamic Dampers. (M-3000-ZXM or the M18000-ZXM). The springs rate are similar to the springs in the Dynamic Suspension kit (M-3000-ZXM) but are lower a true 1.5”. The Springs rates are F: 120~160 lb/in and R: 160~280 lb/in. Don’t worry that the progress springs because basically you only use the full stiff part of the springs, the lower end is mainly like a tender spring.

or

M-5560-ZXM and ZXM1
Drop: 1.5””
F: 120~160 lb/in (est)
R: 110~280 lb/in (est)

Which one is the correct spring rates?

thanks

**Ted7rns** · 05-23-2008, 05:09 PM

I don't know. but, we're only talking a difference of 50lbs of unsprung spring rate.

I would think it's close to 110lbs... but maybe an average of 135lbs is better. I think the important thing here is you're getting to hooked on the numbers. The new springs M-5560-ZXM and ZXM1 are similar to the Dynamic M-3000 springs except they are lower. By how much maybe a 1/4 of an Inch. Not much...but more so on our race cars.

The spring rates are so simular that there not much of a difference on our race cars. If it's not much of a difference on a race car, I'm sure people won't be able to tell the difference on the street.

Also, you can either ask me the question in the forum or you can PM me.. You don't need to do both.

**Ted7rns** · 05-23-2008, 05:55 PM

The reason for the progressive springs to get the proper seat so it wouldn't come out of it's seat and not seat properly when the suspension was let back down.

Also keep in mind that every spring behaves progressively, the more they're compressed the more force they exert, the difference is that a progressively wound spring has a changing rate over it's specific range as opposed to a linear spring which has a constant rate over it's full range. Over the relatively narrow range of motion for which a suspension is working the difference between a linear and progressive spring would be very difficult to tell from behind the wheel. Small changes in the dampers would be much easier to perceive.

The springs that come from FRPP have a very narrow progressive range, so most of the light spring rate is gone from just the weight of the car sitting on the springs it self.

So when looking at the spring rates on the FRPP go by the higher spring number not the softer, because that is what the true workable spring rate is on these springs. This one of the reason why spring companies do not like to list there progressive springs rate and some companies that have progressive springs only list the higher spring rate, like H&R does. It creates less confusion.

**eddiebrock71** · 05-24-2008, 02:14 AM

So basically on the progressive springs, the soft rate is just there to make a high rate spring seat properly?

**zts4u2nv** · 05-25-2008, 09:30 PM

Looking for any info as in what springs/ shocks/ tires this car is running??

I would love to get my 07 ses sitting like this car

**Ted7rns** · 05-26-2008, 12:38 PM

Quote:

Originally Posted by eddiebrock71

So basically on the progressive springs, the soft rate is just there to make a high rate spring seat properly?

Yes

05-18-2008, 04:26 AM	#1
eddiebrock71 Junior Member Join Date: May 2006 Posts: 82	frpp springs does anyone know if the springs are progressive? The fronts look specific, but the rears look progressive. However, the rears could be specific once the weight of the car is on the springs. Does anyone know for sure? And how much stiffer are they over stock springs? If the rear springs are progressive, do they ever get softer than the front spring rates? Thanks

05-18-2008, 01:24 PM	#2
hommie [FJ] Specialist Join Date: Jan 2004 Location: Lake Stevens, WA Posts: 5,627	Re: frpp springs I am not sure if they are progressive or not. It is just a little stiffer then the stock setup. It is a great kit for a daily driven car. I like mine alot __________________ 2006 CD Silver ZX3 FRPP Suspension, FS Cool-Flo Intake, FS Strut Tower Bar, 22mm Steeda Rear Sway Bar, 17" Konig Holes.

05-22-2008, 10:59 AM	#4
hommie [FJ] Specialist Join Date: Jan 2004 Location: Lake Stevens, WA Posts: 5,627	Re: frpp springs It is probably not the best setup if you are going to do some track events. However for the street and a few back road corners it is great. I really like how well the kit was put together. You didn't have to reuse anything, it was all new stuff. __________________ 2006 CD Silver ZX3 FRPP Suspension, FS Cool-Flo Intake, FS Strut Tower Bar, 22mm Steeda Rear Sway Bar, 17" Konig Holes.

05-22-2008, 12:51 PM	#5
Ted7rns Moderator Join Date: Nov 2002 Location: Thousand Oaks, California Posts: 4,168	Re: frpp springs I take you’re talking about the M-5560 *** Springs??? They are stiffer then the OEM and SVT Springs. They are also progressive. But, they work best with the Dynamic Dampers. (M-3000-ZXM or the M18000-ZXM). The springs rate are similar to the springs in the Dynamic Suspension kit (M-3000-ZXM) but are lower a true 1.5”. The Springs rates are F: 120~160 lb/in and R: 160~280 lb/in. Don’t worry that the progress springs because basically you only use the full stiff part of the springs, the lower end is mainly like a tender spring. This springs/dampers can be used on the street and the track. This is the same setup we use on our Spec Focus Race cars and will handle much better then the SVT kit and will have a lot less understeer. But these springs do work best with the Multimatic Dampers. __________________ NASA Spec Focus Series Director \| NASA HPDE Instructor 2002 Ford Focus ZX3 Malibu Blue <23> NASA is dedicated to aspiring or accomplished Focus racers and track enthusiast.

05-22-2008, 04:04 PM	#6
eddiebrock71 Junior Member Join Date: May 2006 Posts: 82	Re: frpp springs I was looking at this setup also. 2006-07 Performance Focus Springs (M-5560-ZXM1) for the 2006+ focus. I like the spring rates, pretty much the steeda sport springs, not the eibach springs sold by steeda. The higher rate rear springs, will help reduce understeer. however was not quite sure about the multimatic shocks/struts 2006-08 Focus Dynamic Damper Kit (M-18000-ZXM1). I have seen these parts together going for $678. but I like the fact that the 2006-07 Focus Damper Kit (M-18000-ZX3B) is a complete kit, bump stops, and all the little stuff ford says is a one time use. so i was thinking about the zx3b kit with the zxm1 springs? How do you think the shocks/struts from the zx3b would hold up with those spring rates? I think they would work since they are set up for a 1.5 inch drop? and if i did use the multimatic, do they now come with bushings installed in the rear shocks? and what about bump stops.

05-22-2008, 04:23 PM	#8
eddiebrock71 Junior Member Join Date: May 2006 Posts: 82	Re: frpp springs I know the multimatics are able to handle the zxm1 springs, they were designed for that. but what about the zx3b struts, they are set up for a 1.5 drop, but not really made for the spring rates of the zxm1 springs. also, i am not sure on the bump stops, with the multimatic arent the front bumpstops internal, but what would I do for the rear bump stops.

05-22-2008, 04:28 PM	#9
hommie [FJ] Specialist Join Date: Jan 2004 Location: Lake Stevens, WA Posts: 5,627	Re: frpp springs I have the M-5560-zxm1 springs with the m-18000-zx3b dampers. It works great and you are right it is a complete kit. No need to reuse anything. If you planning on driving you car as a commuter I wouldn't go with the dynamic dampers. I had a set on my SVTF and they did great on the track. However on the street it was really rough and not very comfortable to ride in for long periods of time. __________________ 2006 CD Silver ZX3 FRPP Suspension, FS Cool-Flo Intake, FS Strut Tower Bar, 22mm Steeda Rear Sway Bar, 17" Konig Holes.

05-22-2008, 04:48 PM	#10
eddiebrock71 Junior Member Join Date: May 2006 Posts: 82	frpp zxm1 springs I was looking at this setup. 2006-07 Performance Focus Springs (M-5560-ZXM1) for the 2006+ focus. I like the spring rates, pretty much the steeda sport springs, not the eibach springs sold by steeda. The higher rate rear springs, will help reduce understeer. however was not quite sure about the multimatic shocks/struts (M-18000-ZXM1), I know they are good and specific to the ZXM1 springs, but do they come with the rear shock bushings installed or do you have to have some installed like the older multimatic kit. also, since the car will be lower, how is the bumpstop issues resolved. and the damping could be a litte rough for daily driving. I have seen these parts together going for $678. However, I like the fact that the 2006-07 Focus Damper Kit (M-18000-ZX3B) is a complete kit, bump stops, and all the little stuff ford says is a one time use. so i was thinking about the zx3b kit with the zxm1 springs? How do you think the shocks/struts from the zx3b would hold up with those spring rates? I think they would work since they are set up for a 1.5 inch drop? I have seen where people have used the stock shocks/struts with steeda springs on the 2005 and ealier without problems and the steeda spring rates, and almost identical to the ZXM1 rates. So since the zx3b struts/shocks are better than stock, I figure they would work. Thanks for your responses.

05-22-2008, 05:10 PM	#11
Ted7rns Moderator Join Date: Nov 2002 Location: Thousand Oaks, California Posts: 4,168	Re: frpp zxm1 springs All the Dampers sold by FRPP including the older Dynamic Suspension now come with bushing, bumpstops and etc. The M-18000-ZX3B are Similar to the SVT Dampers. It might not be able to handle the stiffer spring rates. __________________ NASA Spec Focus Series Director \| NASA HPDE Instructor 2002 Ford Focus ZX3 Malibu Blue <23> NASA is dedicated to aspiring or accomplished Focus racers and track enthusiast.

05-22-2008, 05:39 PM	#12
Ted7rns Moderator Join Date: Nov 2002 Location: Thousand Oaks, California Posts: 4,168	Re: frpp zxm1 springs I take it you have a 2006+ car. I would get the Dynamic Damper Kit M-18000-ZXM1 and get the M-5560-zxm1 and it will help the understeering. Don't worry about the Dampers they come with everything you need to install them. By the way this car has the same setup. This car has the same dampers but the older springs that comes with the M-3000-ZXM kit __________________ NASA Spec Focus Series Director \| NASA HPDE Instructor 2002 Ford Focus ZX3 Malibu Blue <23> NASA is dedicated to aspiring or accomplished Focus racers and track enthusiast.

05-23-2008, 02:51 AM	#14
eddiebrock71 Junior Member Join Date: May 2006 Posts: 82	Re: frpp springs anymore pics of the red focus with the dynamic kit, maybe a straight side on shot.

05-23-2008, 09:30 AM	#15
brads03zx3 [FJ] Specialist Join Date: Sep 2004 Location: California Posts: 9,005	Re: frpp zxm1 springs Typically, the spec focus is lighter than a standard street car, so this kit usually sits slightly lower. __________________ Mountain Tested----'03 zetec DuraMonster---'03 duratec ZX3 vs MNTN - 9/0 & ZX3 vs TRACK - 4/1 *JCM Racing #88* Bouncing Back---Bigger, Faster, Stronger Vacuum Vulture Racing - We put the ARG in 'CHARGED

05-23-2008, 12:09 PM	#16
BOWERSdaAZIAN TEAM Member Join Date: Jun 2004 Location: NorCal/Clovis NM ; wherever the USAF takes me Posts: 757	Re: frpp zxm1 springs A little off topic, but it may help those interested in FRPP products. I have the M-3000-ZXM kit waiting to be installed. Anyone know how different the dampers are between the M-18000-ZX3B, M18000-ZXM1 and the kit i have? I know those are for the 06+ but in terms of "beefyness" or ability to handle shorter/harsher springs. __________________ EW motto(s): "Jam Harder, Penetrate Deeper, Dispense Longer" and "In God we Trust, All Others we Monitor, Jam or Deceive" Last edited by BOWERSdaAZIAN : 05-23-2008 at 12:40 PM.

05-23-2008, 01:07 PM	#17
eddiebrock71 Junior Member Join Date: May 2006 Posts: 82	Re: frpp zxm1 springs Struts and shocks should be set for the ride height of the springs. However, Ford needs to put out more information on their FRPP products. It is a pain, trying to get specs on their springs, struts and shocks. This is vital information for consumers. For example, the zxm1 states it is race oriented, but that is according to ford specs. a consumer may like the rate of the springs for daily driving, but if ford does not release that information you do not know what you are getting. if i already have a certain spring rate, i can determine if i need stiffer or softer springs. but if a manufacturer never releases specs, you would spend more money trying to find the right set up. anyways, i believe the zxm1 are set to be more stiff. so the zx3b would be more like a koni adjustable on soft, while the zxm1 would be more like it set to hard. the zx3b will probably give a softer ride as is soaks up bumps more, while the zxm1 will work to keep tire contact more, which in turn my make a harsher ride. But how harsh depends on your individual taste. zx3b is about like the svt focus. zxm1 is going to be more harsher.

05-23-2008, 01:32 PM	#19
BOWERSdaAZIAN TEAM Member Join Date: Jun 2004 Location: NorCal/Clovis NM ; wherever the USAF takes me Posts: 757	Re: frpp zxm1 springs You're the man Ted, appreciate the information! __________________ EW motto(s): "Jam Harder, Penetrate Deeper, Dispense Longer" and "In God we Trust, All Others we Monitor, Jam or Deceive"

05-23-2008, 03:05 PM	#20
eddiebrock71 Junior Member Join Date: May 2006 Posts: 82	Re: frpp springs [quote=Ted7rns]I take you’re talking about the M-5560 *** Springs??? They are stiffer then the OEM and SVT Springs. They are also progressive. But, they work best with the Dynamic Dampers. (M-3000-ZXM or the M18000-ZXM). The springs rate are similar to the springs in the Dynamic Suspension kit (M-3000-ZXM) but are lower a true 1.5”. The Springs rates are F: 120~160 lb/in and R: 160~280 lb/in. Don’t worry that the progress springs because basically you only use the full stiff part of the springs, the lower end is mainly like a tender spring. or M-5560-ZXM and ZXM1 Drop: 1.5”” F: 120~160 lb/in (est) R: 110~280 lb/in (est) Which one is the correct spring rates? thanks

05-23-2008, 05:09 PM	#21
Ted7rns Moderator Join Date: Nov 2002 Location: Thousand Oaks, California Posts: 4,168	Re: frpp zxm1 springs I don't know. but, we're only talking a difference of 50lbs of unsprung spring rate. I would think it's close to 110lbs... but maybe an average of 135lbs is better. I think the important thing here is you're getting to hooked on the numbers. The new springs M-5560-ZXM and ZXM1 are similar to the Dynamic M-3000 springs except they are lower. By how much maybe a 1/4 of an Inch. Not much...but more so on our race cars. The spring rates are so simular that there not much of a difference on our race cars. If it's not much of a difference on a race car, I'm sure people won't be able to tell the difference on the street. Also, you can either ask me the question in the forum or you can PM me.. You don't need to do both. __________________ NASA Spec Focus Series Director \| NASA HPDE Instructor 2002 Ford Focus ZX3 Malibu Blue <23> NASA is dedicated to aspiring or accomplished Focus racers and track enthusiast.

05-23-2008, 05:55 PM	#22
Ted7rns Moderator Join Date: Nov 2002 Location: Thousand Oaks, California Posts: 4,168	Re: frpp zxm1 springs The reason for the progressive springs to get the proper seat so it wouldn't come out of it's seat and not seat properly when the suspension was let back down. Also keep in mind that every spring behaves progressively, the more they're compressed the more force they exert, the difference is that a progressively wound spring has a changing rate over it's specific range as opposed to a linear spring which has a constant rate over it's full range. Over the relatively narrow range of motion for which a suspension is working the difference between a linear and progressive spring would be very difficult to tell from behind the wheel. Small changes in the dampers would be much easier to perceive. The springs that come from FRPP have a very narrow progressive range, so most of the light spring rate is gone from just the weight of the car sitting on the springs it self. So when looking at the spring rates on the FRPP go by the higher spring number not the softer, because that is what the true workable spring rate is on these springs. This one of the reason why spring companies do not like to list there progressive springs rate and some companies that have progressive springs only list the higher spring rate, like H&R does. It creates less confusion. __________________ NASA Spec Focus Series Director \| NASA HPDE Instructor 2002 Ford Focus ZX3 Malibu Blue <23> NASA is dedicated to aspiring or accomplished Focus racers and track enthusiast. Last edited by Ted7rns : 05-23-2008 at 06:06 PM.

05-24-2008, 02:14 AM	#23
eddiebrock71 Junior Member Join Date: May 2006 Posts: 82	Re: frpp zxm1 springs So basically on the progressive springs, the soft rate is just there to make a high rate spring seat properly?

05-25-2008, 09:30 PM	#24
zts4u2nv TEAM Member Join Date: Dec 2000 Location: LaSalle, MI Posts: 194	Re: frpp zxm1 springs Looking for any info as in what springs/ shocks/ tires this car is running?? I would love to get my 07 ses sitting like this car __________________ 2007 Black ZX4 SES -- 20% tint all around, ST grill, many more mods to come!!!