home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Reply
 
Thread Tools Display Modes
Old 09-28-2016, 12:28 PM   #1
mikep
The MP
 
mikep's Avatar
 
Join Date: May 2003
Location: 38° 27' N 75° 29' W
Default Spring Rate Data

Starting the spring thread that was requested.
I will edit it as we go, adding numbers and deleting extraneous comments.
Please comment, and please offer to loan sets of springs if you remove KNOWN OE springs to change anything. I would also test any lowering or overload springs you can loan me.
I'm at the south end of Delaware, and can meet somewhere else if we can work it out.

Quotes from another thread:

Quote:
Originally Posted by mikep View Post
I did all the springs a long time ago and found varying results. The first numbers posted above were probably from measuring the wire plus paint. I do remember a wagon rear spring being around that number. Then I lost that notebook.

Since I couldn't find any numbers, I started over.
I just measured the springs from a mid-80s CT 244 that went to the crusher.

Front Springs 80 lb/inch.
Rear Springs 91 lb/inch.

Scraped off the paint and undercoating, measured, did the math. Pretty close.
Maybe that wagon with 117# had overloads, but 117 and 107 aren't that far apart. Plus the 117 might have been measuring and using a calculator.
And maybe the 120# fronts that were mentioned were GT or Diesel springs. I really wish I had the diesel springs I got rid of.



Quote:
Originally Posted by mikep View Post
*edit
I measured how much pressure it took to compress each spring, and retested each run. Then I increased the pre-load, so I got numbers starting at 40, 50, 60, 70, 80lbs. That's TEN tests per spring.


I will have turbo wagon (US) from the junkyard as soon as I have the money to pay for the front suspension. Until then, nobody has offered to let me test any springs at all. I do what I can.
I'll test another mid-80s sedan soon, and also a non-turbo 940 wagon.
(I paid for the suspension, haven't seen it yet in the several months, even when I told him to drag it here and let me remove it.


Quote:
Originally Posted by John V, outside agitator View Post
Mike, sticky somewhere?
Done. At least, it's a start.


Yesterday I tested 1992 wagon rears. They were a little off side to side.
One was 97 pound/inch, one was 107. Looking for another set.

I have another 240 sedan that I will test soon, and I will try to get these fronts tested. Had some issues with a brake line, and it's changeover day for the exploratory class.
__________________
Quote:
Originally Posted by SlowRide View Post
Ass is bending space time
mikep is offline   Reply With Quote
Old 09-28-2016, 12:34 PM   #2
mikep
The MP
 
mikep's Avatar
 
Join Date: May 2003
Location: 38° 27' N 75° 29' W
Default so, just measured numbers:

1988 Hartford CT 244
Front springs 80 lb/in
449mm (17-5/8") free length
166mm overall Diameter
13.2mm (.520") wire diameter
5.5 free coils
11.5" installed height hanging
8.5" installed height sitting

Rear 91 lb/in
415mm (16-3/8") free length
129mm overall Diameter
11.85mm (.466") wire diameter
7.5 free coils
15.25" installed height hanging
12.25" installed height sitting

Last edited by mikep; 11-16-2016 at 11:18 AM..
mikep is offline   Reply With Quote
Old 09-29-2016, 09:30 PM   #3
mikep
The MP
 
mikep's Avatar
 
Join Date: May 2003
Location: 38° 27' N 75° 29' W
Default

92 245
Front springs 79 and 80 lb/in
445mm (17-1/2") free length
167mm overall Diameter
13.6mm (.540") wire diameter
5.5 free coils
___ installed height

Rear 97/107#
449mm (16-5/8") free length (will recheck)
129mm overall Diameter
13mm (.510") wire diameter
8 free coils
___ installed height

Last edited by mikep; 10-05-2016 at 04:43 PM..
mikep is offline   Reply With Quote
Old 10-05-2016, 04:43 PM   #4
mikep
The MP
 
mikep's Avatar
 
Join Date: May 2003
Location: 38° 27' N 75° 29' W
Default

added numbers, separated into posts.
If there's an inch with fractions, it was a tape measure. If a decimal, it was a dial caliper.
I scraped off the paint with a knife for the wire dia.

I did not use math to get the rates. I used a scale and a dial indicator on a compressing fixture.
When I have time, I will go to NASCAR-land with some springs to see how close my rig was.

Last edited by mikep; 11-16-2016 at 11:19 AM..
mikep is offline   Reply With Quote
Old 11-16-2016, 11:21 AM   #5
mikep
The MP
 
mikep's Avatar
 
Join Date: May 2003
Location: 38° 27' N 75° 29' W
Default

Added installed data for the sedan. The guinea pig was a 1983 Canadian 244 with no carpet.
mikep is offline   Reply With Quote
Old 08-29-2017, 09:12 PM   #6
lummert
Board Member
 
lummert's Avatar
 
Join Date: Jan 2008
Location: Portland IN
Default

http://www.kilensprings.com/springs-...ecatalogue.asp
__________________
Trying to understand stupid people is like trying to pick up a turd by the clean end.
lummert is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 04:37 PM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.