-
Hey Guest!
British Car Forum has been supporting enthusiasts for over 25 years by providing a great place to share our love for British cars. You can support our efforts by upgrading your membership for less than the dues of most car clubs. There are some perks with a member upgrade!**Upgrade Now**
(PS: Upgraded members don't see this banner, nor will you see the Google ads that appear on the site.)
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
TR6 Anyone use TR6 rear springs in their TR4a IRS?
- Thread starter tdskip
- Start date
Share this page
HerronScott
Darth Vader
Offline
Tom,
I used TRF's SAH1081 "competition rear springs" in my TR4A back in 1982. You can check out a picture of my car just after the restoration in the thread below.
TR4A/TR6 rear springs
I was pretty happy with the ride height front/rear and how they handled at the time, but then again I didn't have much to compare them to since it was my first car and prior to restoring it, I was driving on 26 year old springs!
Scott
I used TRF's SAH1081 "competition rear springs" in my TR4A back in 1982. You can check out a picture of my car just after the restoration in the thread below.
TR4A/TR6 rear springs
I was pretty happy with the ride height front/rear and how they handled at the time, but then again I didn't have much to compare them to since it was my first car and prior to restoring it, I was driving on 26 year old springs!
Scott
RJS
Jedi Warrior
Offline
I'm still running original stock springs in my TR4A but, new springs, HD rebuilt lever shocks and poly trailing arm bushings are on my ToDo list for next year.
I've compiled quite a list of spring rates by supplier. The stock TR4A springs are rated at 280 lbs. A standard upgrade are the TR6 springs at 354 lbs. And uprated TR6 spring comes in a 390 lbs. Race springs are ~510 lbs.
What I haven't studied yet are how spring rate and spring length impact ride height. I suspect a higher rate spring will either need to be shorter or use smaller packing pieces to maintain the same ride height.
Bob
PS: does any one know if springs "wear out" over time or can one say so long as they are not physically broken, performance will be "as new"? Essentially, if I replace my 44 year old original stock springs with new stock replacements, would I see any difference?
I've compiled quite a list of spring rates by supplier. The stock TR4A springs are rated at 280 lbs. A standard upgrade are the TR6 springs at 354 lbs. And uprated TR6 spring comes in a 390 lbs. Race springs are ~510 lbs.
What I haven't studied yet are how spring rate and spring length impact ride height. I suspect a higher rate spring will either need to be shorter or use smaller packing pieces to maintain the same ride height.
Bob
PS: does any one know if springs "wear out" over time or can one say so long as they are not physically broken, performance will be "as new"? Essentially, if I replace my 44 year old original stock springs with new stock replacements, would I see any difference?
In my experience with sprint car springs where we'd check them after ever race, springs tend to lose a small chunk of spring rate and static height after a race or two then become stable for a couple of years and then start to slowly degrade. I would suspect that road springs follow a similar path.
R
RonMacPherson
Guest
Guest
Offline
My desire for speed, and money and physical gratification(family forum, so you can figger the last Ken) 