STD Tuning Suspension how much to cut: springs

how much to cut: springs

how much to cut: springs

 
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Purplecomputer
Slowness 220D

897
05-01-2012, 06:22 PM #1
So im thinking about lowering my car

my plan is to replace the kyb shocks I have in the back and use some HD bilsteins and cut the springs

ive already replaced the subframe mounts and rear differential mount. Would i be wise to just buy brand new springs or do you think my 30+ year old springs are still good?

if so how much should I cut?

I plan to keep the kyb shocks in the front and cut the springs to match the back
Purplecomputer
05-01-2012, 06:22 PM #1

So im thinking about lowering my car

my plan is to replace the kyb shocks I have in the back and use some HD bilsteins and cut the springs

ive already replaced the subframe mounts and rear differential mount. Would i be wise to just buy brand new springs or do you think my 30+ year old springs are still good?

if so how much should I cut?

I plan to keep the kyb shocks in the front and cut the springs to match the back

larsalan
Superturbo

1,272
05-01-2012, 07:05 PM #2
There's a "cut your springs" thread or 2 here but...
I cut like 3/4 coil from my rear and have planned to cut 1 and 1/2 coil off the front. I've just never had time to mess with it since the front is so much more involved.
My rear tires are a touch taller than stock. Anyway, I'm sure new springs are nicer but I'm all for reusing older stuff as long as it's still working.
The word on the street is that the front get more cut than the rear if you want to match. Just because they are like way longer and I guess more soft?

Rusted out beat down 300d turbo 82' -- RIP
Nice body, tons of ridiculous mechanical issues - 300d turbo 82' /motor 85'
larsalan
05-01-2012, 07:05 PM #2

There's a "cut your springs" thread or 2 here but...
I cut like 3/4 coil from my rear and have planned to cut 1 and 1/2 coil off the front. I've just never had time to mess with it since the front is so much more involved.
My rear tires are a touch taller than stock. Anyway, I'm sure new springs are nicer but I'm all for reusing older stuff as long as it's still working.
The word on the street is that the front get more cut than the rear if you want to match. Just because they are like way longer and I guess more soft?


Rusted out beat down 300d turbo 82' -- RIP
Nice body, tons of ridiculous mechanical issues - 300d turbo 82' /motor 85'

Kozuka
I'm_Badass

334
05-01-2012, 07:48 PM #3
It's really about how low you want to go. Wouldn't suggest anything more then 2 coils without shortening the shocks/struts (and your going to eat tires). It probably wont be and even cut from front to back since the weight difference (that heavy engine). Start small until you get the desired effect.

1983 300TD : 4 Speed : SLS Delete : More. Daily Deathcab
1987 190E/16v/OM603 : 5 Speed : SLS Delete : Lots More..W201 Project
Kozuka
05-01-2012, 07:48 PM #3

It's really about how low you want to go. Wouldn't suggest anything more then 2 coils without shortening the shocks/struts (and your going to eat tires). It probably wont be and even cut from front to back since the weight difference (that heavy engine). Start small until you get the desired effect.


1983 300TD : 4 Speed : SLS Delete : More. Daily Deathcab
1987 190E/16v/OM603 : 5 Speed : SLS Delete : Lots More..W201 Project

w123love
Stockish

354
05-01-2012, 08:03 PM #4
I put 240 coils in the front of my wagon...instant 1.5 inch drop!

if it don’t blow black...take it back.

1982 300TDT 4 Speed 196K Standard Beige “VEGEWGN”. 300GD FW. Walbro FRC-8 Fuel Pump. ZadaTech LCD Boost, EGT, & Fuel Pressure gauge. Non-EGR Exhaust and Intake Manifold. 3/2 Valves gone. Soon to have Elsbett WVO conversion
1981 300D 314K Midnight Blue “The Blue Car”, Lovecrap system, owned 25 years+
1985 300TD White 198K “Betty White” Pure beauty

The VEGEWGN
w123love
05-01-2012, 08:03 PM #4

I put 240 coils in the front of my wagon...instant 1.5 inch drop!


if it don’t blow black...take it back.

1982 300TDT 4 Speed 196K Standard Beige “VEGEWGN”. 300GD FW. Walbro FRC-8 Fuel Pump. ZadaTech LCD Boost, EGT, & Fuel Pressure gauge. Non-EGR Exhaust and Intake Manifold. 3/2 Valves gone. Soon to have Elsbett WVO conversion
1981 300D 314K Midnight Blue “The Blue Car”, Lovecrap system, owned 25 years+
1985 300TD White 198K “Betty White” Pure beauty

The VEGEWGN

sassparilla_kid
diesel > all other fuels

1,618
05-02-2012, 02:50 AM #5
If I ever cut my springs I'd get spacers or something so I can keep the ride height but have the benefit of stiffer springs

-1982 300D Turbo, 280k miles, ALDA apparently maxxed, fram 8038, 12 lbs boost, non-egr manifolds, W/M injection, 4 brake light mod, Gen II w126 front rotors/calipers, 4-speed swap
In the works: A/W IC, adjust pump, turbo rebuild (w/60 trim comp wheel)
-1980 300SD, 110k, project car. Goal is to get it lookin' like it did on the showroom floor (body and interior wise, not necessarily under the hood )
-1974 240D, FRESH PAINT!!!!!!
sassparilla_kid
05-02-2012, 02:50 AM #5

If I ever cut my springs I'd get spacers or something so I can keep the ride height but have the benefit of stiffer springs


-1982 300D Turbo, 280k miles, ALDA apparently maxxed, fram 8038, 12 lbs boost, non-egr manifolds, W/M injection, 4 brake light mod, Gen II w126 front rotors/calipers, 4-speed swap
In the works: A/W IC, adjust pump, turbo rebuild (w/60 trim comp wheel)
-1980 300SD, 110k, project car. Goal is to get it lookin' like it did on the showroom floor (body and interior wise, not necessarily under the hood )
-1974 240D, FRESH PAINT!!!!!!

w123love
Stockish

354
05-02-2012, 11:43 AM #6
(05-02-2012, 02:50 AM)sassparilla_kid If I ever cut my springs I'd get spacers or something so I can keep the ride height but have the benefit of stiffer springs

The whole reason for cutting springs is lowering the car....

if it don’t blow black...take it back.

1982 300TDT 4 Speed 196K Standard Beige “VEGEWGN”. 300GD FW. Walbro FRC-8 Fuel Pump. ZadaTech LCD Boost, EGT, & Fuel Pressure gauge. Non-EGR Exhaust and Intake Manifold. 3/2 Valves gone. Soon to have Elsbett WVO conversion
1981 300D 314K Midnight Blue “The Blue Car”, Lovecrap system, owned 25 years+
1985 300TD White 198K “Betty White” Pure beauty

The VEGEWGN
w123love
05-02-2012, 11:43 AM #6

(05-02-2012, 02:50 AM)sassparilla_kid If I ever cut my springs I'd get spacers or something so I can keep the ride height but have the benefit of stiffer springs

The whole reason for cutting springs is lowering the car....


if it don’t blow black...take it back.

1982 300TDT 4 Speed 196K Standard Beige “VEGEWGN”. 300GD FW. Walbro FRC-8 Fuel Pump. ZadaTech LCD Boost, EGT, & Fuel Pressure gauge. Non-EGR Exhaust and Intake Manifold. 3/2 Valves gone. Soon to have Elsbett WVO conversion
1981 300D 314K Midnight Blue “The Blue Car”, Lovecrap system, owned 25 years+
1985 300TD White 198K “Betty White” Pure beauty

The VEGEWGN

sassparilla_kid
diesel > all other fuels

1,618
05-02-2012, 05:06 PM #7
Cutting the springs also makes them stiffer, and since I'm sort of tall-ish I just want stiffer springs but the same height car because getting in and out of low cars gets annoying after a while. I would compromise on height however if these cars didn't have a bus/semi sized steering wheel lol

-1982 300D Turbo, 280k miles, ALDA apparently maxxed, fram 8038, 12 lbs boost, non-egr manifolds, W/M injection, 4 brake light mod, Gen II w126 front rotors/calipers, 4-speed swap
In the works: A/W IC, adjust pump, turbo rebuild (w/60 trim comp wheel)
-1980 300SD, 110k, project car. Goal is to get it lookin' like it did on the showroom floor (body and interior wise, not necessarily under the hood )
-1974 240D, FRESH PAINT!!!!!!
sassparilla_kid
05-02-2012, 05:06 PM #7

Cutting the springs also makes them stiffer, and since I'm sort of tall-ish I just want stiffer springs but the same height car because getting in and out of low cars gets annoying after a while. I would compromise on height however if these cars didn't have a bus/semi sized steering wheel lol


-1982 300D Turbo, 280k miles, ALDA apparently maxxed, fram 8038, 12 lbs boost, non-egr manifolds, W/M injection, 4 brake light mod, Gen II w126 front rotors/calipers, 4-speed swap
In the works: A/W IC, adjust pump, turbo rebuild (w/60 trim comp wheel)
-1980 300SD, 110k, project car. Goal is to get it lookin' like it did on the showroom floor (body and interior wise, not necessarily under the hood )
-1974 240D, FRESH PAINT!!!!!!

Kozuka
I'm_Badass

334
05-02-2012, 05:43 PM #8
(05-02-2012, 05:06 PM)sassparilla_kid Cutting the springs also makes them stiffer, and since I'm sort of tall-ish I just want stiffer springs but the same height car because getting in and out of low cars gets annoying after a while. I would compromise on height however if these cars didn't have a bus/semi sized steering wheel lol

There are steering wheel hub adapters Big Grin

I would recommend a oil pan guard from the dealer before experimenting with a lowered car. Why can't you just use w126 springs in a w123 for a stiffer ride with stock ride height if they are too tall just cut them make them stiffer.

1983 300TD : 4 Speed : SLS Delete : More. Daily Deathcab
1987 190E/16v/OM603 : 5 Speed : SLS Delete : Lots More..W201 Project
Kozuka
05-02-2012, 05:43 PM #8

(05-02-2012, 05:06 PM)sassparilla_kid Cutting the springs also makes them stiffer, and since I'm sort of tall-ish I just want stiffer springs but the same height car because getting in and out of low cars gets annoying after a while. I would compromise on height however if these cars didn't have a bus/semi sized steering wheel lol

There are steering wheel hub adapters Big Grin

I would recommend a oil pan guard from the dealer before experimenting with a lowered car. Why can't you just use w126 springs in a w123 for a stiffer ride with stock ride height if they are too tall just cut them make them stiffer.


1983 300TD : 4 Speed : SLS Delete : More. Daily Deathcab
1987 190E/16v/OM603 : 5 Speed : SLS Delete : Lots More..W201 Project

DeliveryValve
Superturbo

1,338
05-03-2012, 01:07 AM #9
(05-02-2012, 05:43 PM)Kozuka
(05-02-2012, 05:06 PM)sassparilla_kid Cutting the springs also makes them stiffer, and since I'm sort of tall-ish I just want stiffer springs but the same height car because getting in and out of low cars gets annoying after a while. I would compromise on height however if these cars didn't have a bus/semi sized steering wheel lol

There are steering wheel hub adapters Big Grin

I would recommend a oil pan guard from the dealer before experimenting with a lowered car. Why can't you just use w126 springs in a w123 for a stiffer ride with stock ride height if they are too tall just cut them make them stiffer.

126 front springs will not fit the w123. Rears will. The only other "readily available" other option is w116 front springs with w116/w126 rear spring combo.


.


.

Gota love Mercedes Diesels!



.
DeliveryValve
05-03-2012, 01:07 AM #9

(05-02-2012, 05:43 PM)Kozuka
(05-02-2012, 05:06 PM)sassparilla_kid Cutting the springs also makes them stiffer, and since I'm sort of tall-ish I just want stiffer springs but the same height car because getting in and out of low cars gets annoying after a while. I would compromise on height however if these cars didn't have a bus/semi sized steering wheel lol

There are steering wheel hub adapters Big Grin

I would recommend a oil pan guard from the dealer before experimenting with a lowered car. Why can't you just use w126 springs in a w123 for a stiffer ride with stock ride height if they are too tall just cut them make them stiffer.

126 front springs will not fit the w123. Rears will. The only other "readily available" other option is w116 front springs with w116/w126 rear spring combo.


.


.


Gota love Mercedes Diesels!



.

JustPassinThru
W123 and W124

491
05-03-2012, 07:48 AM #10
@DV: if you have an opinion on this, ...would the W116/W126 front/rear spring combination, uncut, *raise* a W123? Would the car need to be wheel-aligned after doing this?

Gone but not forgotten: two W123 sedans and two W124 wagons.
W124 1987 300TD wagon, for sale, $1000 (some assembly required).
JustPassinThru
05-03-2012, 07:48 AM #10

@DV: if you have an opinion on this, ...would the W116/W126 front/rear spring combination, uncut, *raise* a W123? Would the car need to be wheel-aligned after doing this?


Gone but not forgotten: two W123 sedans and two W124 wagons.
W124 1987 300TD wagon, for sale, $1000 (some assembly required).

Kozuka
I'm_Badass

334
05-03-2012, 12:13 PM #11
300SD W116 4,000lbs
300D W123 3,582lbs
300SD W126 3,616lbs

If front and rear W116 springs fit it will defiantly give you a lift.

1983 300TD : 4 Speed : SLS Delete : More. Daily Deathcab
1987 190E/16v/OM603 : 5 Speed : SLS Delete : Lots More..W201 Project
Kozuka
05-03-2012, 12:13 PM #11

300SD W116 4,000lbs
300D W123 3,582lbs
300SD W126 3,616lbs

If front and rear W116 springs fit it will defiantly give you a lift.


1983 300TD : 4 Speed : SLS Delete : More. Daily Deathcab
1987 190E/16v/OM603 : 5 Speed : SLS Delete : Lots More..W201 Project

JustPassinThru
W123 and W124

491
05-03-2012, 02:00 PM #12
Hm. Reason I'm curious is, the previous owner did *something* to the suspension of mine; front is one inch higher and rear is 1-1/2" lower than my other 300D which is definitely stock. It sure does ride and handle well. Maybe it has W116 springs in front.

I bought it from a young man from Kentucky, who had bought it from the estate of its local new purchaser just a few months previously. Said his dad and uncles were all moonshiners and he had just put new rear springs and shocks on it. All springs and shocks are black, no identification. I wish he hadn't told me that, because...if you are my age, what instantly comes to mind, thinking about a kid from Kentucky and suspension sweetening, is the 1958 Robert Mitchum movie "Thunder Road" and especially its theme song, which received a lot of airplay in 1962 when I was about 7, see

Movie:
http://en.wikipedia.org/wiki/Thunder_Road
Theme song:
http://en.wikipedia.org/wiki/The_Ballad_of_Thunder_Road
Lyrics:
http://sniff.numachi.com/pages/tiTHUNDRD.html

Every time I have to floor it or pull some swift swerve maneuver, I then have to turn Best of the Doors up loud for a few minutes to clear that song out of my mind.

Recording:
http://djallyn.org/archives/1223

Dangit, now I'm gonna have that song going through my head all day. Misery loves company ;-}




This post was last modified: 05-03-2012, 07:59 PM by JustPassinThru.

Gone but not forgotten: two W123 sedans and two W124 wagons.
W124 1987 300TD wagon, for sale, $1000 (some assembly required).
JustPassinThru
05-03-2012, 02:00 PM #12

Hm. Reason I'm curious is, the previous owner did *something* to the suspension of mine; front is one inch higher and rear is 1-1/2" lower than my other 300D which is definitely stock. It sure does ride and handle well. Maybe it has W116 springs in front.

I bought it from a young man from Kentucky, who had bought it from the estate of its local new purchaser just a few months previously. Said his dad and uncles were all moonshiners and he had just put new rear springs and shocks on it. All springs and shocks are black, no identification. I wish he hadn't told me that, because...if you are my age, what instantly comes to mind, thinking about a kid from Kentucky and suspension sweetening, is the 1958 Robert Mitchum movie "Thunder Road" and especially its theme song, which received a lot of airplay in 1962 when I was about 7, see

Movie:
http://en.wikipedia.org/wiki/Thunder_Road
Theme song:
http://en.wikipedia.org/wiki/The_Ballad_of_Thunder_Road
Lyrics:
http://sniff.numachi.com/pages/tiTHUNDRD.html

Every time I have to floor it or pull some swift swerve maneuver, I then have to turn Best of the Doors up loud for a few minutes to clear that song out of my mind.

Recording:
http://djallyn.org/archives/1223

Dangit, now I'm gonna have that song going through my head all day. Misery loves company ;-}





Gone but not forgotten: two W123 sedans and two W124 wagons.
W124 1987 300TD wagon, for sale, $1000 (some assembly required).

DeliveryValve
Superturbo

1,338
05-03-2012, 05:43 PM #13
W123 suspensions are sometimes tricky. Often times if there is supension work and the alignment is slightly off the car can sit higher up front. Another issue in which you alluded to is when the rear supension is also worked on. If the rear supension is lower than the front, due to spring changes and different shocks, it will certainly have an effect on the height of the front by raising it. For starters, I would try changing out the rear spring pad to lower the front some.

In regards to installing w116 spring. Yes it will definitely raise the car. You possibly tell if you have w116 front springs by measuring the wire diameter. W116 springs will 16mm thick. While the typical 300d turbo front spring is 15.8mm thick. The rear 116 spring would be around 17mm while the 300d spring would be around 16mm. W116 springs are taller also, so if you want a stiffer spring and keep the same height on your w123, you'll need to cut them.


.

Gota love Mercedes Diesels!



.
DeliveryValve
05-03-2012, 05:43 PM #13

W123 suspensions are sometimes tricky. Often times if there is supension work and the alignment is slightly off the car can sit higher up front. Another issue in which you alluded to is when the rear supension is also worked on. If the rear supension is lower than the front, due to spring changes and different shocks, it will certainly have an effect on the height of the front by raising it. For starters, I would try changing out the rear spring pad to lower the front some.

In regards to installing w116 spring. Yes it will definitely raise the car. You possibly tell if you have w116 front springs by measuring the wire diameter. W116 springs will 16mm thick. While the typical 300d turbo front spring is 15.8mm thick. The rear 116 spring would be around 17mm while the 300d spring would be around 16mm. W116 springs are taller also, so if you want a stiffer spring and keep the same height on your w123, you'll need to cut them.


.


Gota love Mercedes Diesels!



.

JustPassinThru
W123 and W124

491
05-03-2012, 06:39 PM #14
Thanks muchly. As soon as we get a day when it isn't raining, after I finish getting some things packed and mailed, I'll go out and put the Vernier calipers to them.

Gone but not forgotten: two W123 sedans and two W124 wagons.
W124 1987 300TD wagon, for sale, $1000 (some assembly required).
JustPassinThru
05-03-2012, 06:39 PM #14

Thanks muchly. As soon as we get a day when it isn't raining, after I finish getting some things packed and mailed, I'll go out and put the Vernier calipers to them.


Gone but not forgotten: two W123 sedans and two W124 wagons.
W124 1987 300TD wagon, for sale, $1000 (some assembly required).

Purplecomputer
Slowness 220D

897
05-06-2012, 10:55 PM #15
Yeah........I forgot to tell you guys,

Im not going to lower the car.
Purplecomputer
05-06-2012, 10:55 PM #15

Yeah........I forgot to tell you guys,

Im not going to lower the car.

 
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