Anonymous

Rear Ride Height

The all purpose forum for any TR7/8 related topics.
Frank Thomas
Wedgling
Posts: 15
Joined: 17 Mar 2009 23:46
Location: USA
Contact:

Rear Ride Height

Postby Frank Thomas » 25 Feb 2010 02:10

Hello everyone - I have a question regarding the rear springs from Victoria British here in the states. Last year on my Spider, I replaced the shocks, struts and springs on my 7 with the "heavy duty" variant they sell. After doing this - I have noticed that my 7 has a lot of space between the top of the tire and the bottom lip of the fender (3" or so). Figuring that it would settle, I let it be. But, as I am getting ready to start driving it more regularly - I keep looking at it and thinking it isn't right.

none of the 7's or 8's that I have looked at appear to have that gap between the tire and the fender. Is it worth looking into a set of Ted's lowering springs or trying something else?

For the record, it has KYB Gas-A-Just in the back, and KYB struts in the front (which appears correct visually).

Thanks again for the help!
Frank

TR7 Spider

1980 TR7 Spider

PeterTR7V8
TRemendous
Posts: 2914
Joined: 10 Jun 2008 02:22
Location: New Zealand
Contact:

Postby PeterTR7V8 » 25 Feb 2010 09:38

That's great! Now you can get bigger rims. [:)]

The new springs don't sag as much as the old ones so it is probably will sit higher. What size rims/tyres do you have? FYI, on Rimmers "uprated" 200lb springs the rear arch of my car sits 12 4/5" (32.5cm) above the hub centre.

Image

Frank Thomas
Wedgling
Posts: 15
Joined: 17 Mar 2009 23:46
Location: USA
Contact:

Postby Frank Thomas » 25 Feb 2010 13:26

You are right! I could go with a larger tire (tyre)!

They are the standard 13" tires that are difficult to find. You might be right - it could be that these springs cause it to sit higher.

I will measure from the hub to the center arch and see what the meaurement is.

Thanks for the input!

1980 TR7 Spider

Frank Thomas
Wedgling
Posts: 15
Joined: 17 Mar 2009 23:46
Location: USA
Contact:

Postby Frank Thomas » 25 Feb 2010 22:44

So,here is the latest - did the measurements on the 7 this evening:

13" from the hub center to the top of the fender lip.
14 5/8" from the hub center to the top of the fender lip...I am wondering if I have bad springs!!!???

Time for bigger tyres....

Anyone else seen bad springs from VB?

Cheers,
Frank

1980 TR7 Spider

Hasbeen
TRemendous
Posts: 6474
Joined: 28 Apr 2005 12:32
Location: Australia
Contact:

Postby Hasbeen » 25 Feb 2010 23:33

Frank, I don't quite understand your 2 measurements.

When I first got my current car it sat far too high at the back,
compared to my other 2. It was about 14 1/2" to the arch, with
205 70 13 tyres & looked silly. It also had a large gap above the
rear tyre.

I pulled it all apart & could find no reasdon. The springs were the
correct length, but I fitted an old set of known stock springs,
which made no difference.

I had a set of springs reset down 13/16" lower free length, which is
about as low as you can go, without other modifications, if you
want the springs to not fall out.

This brought it down about an inch, to 13 3/8" [34cm] which is
almost the correct ride height.

The PO told me he had done nothing to cause the problem, & I could
not find anything there either.

I did find a statement somewhere, that the ride height was raised
about an inch, on US cars, some time late in production, but not
how it was done. Perhaps your car, & mine have some odd parts
fitted.

Don't forget, bigger diameter tyres will raise the ride height by
half the extra diameter.

Hasbeen

Frank Thomas
Wedgling
Posts: 15
Joined: 17 Mar 2009 23:46
Location: USA
Contact:

Postby Frank Thomas » 26 Feb 2010 00:21

Hasbeen - Sorry - let me see if I can clarify all this - as I was hurrying to put my daughter down for the night. But your experience sounds in line with mine and the rear wheels.

The factory spec says the ride height for front of the car should be 13" from the center of the hub to the highest part of the wheel arch. On the rear, it should be 13.6 from the center of the hub to the highest part of the wheel arch.

The ride height for my car is 13" at the front which is good...but at the back, it is 14 5/8" high (which is almost 1" higher than the factory spec). The gap between the tire and the top of the wheel arch looks really silly.

One other thing to note: the tires are the P185/70 R13 tires (Bridgestone Potenza), which are the correct size.

So, I am wondering if we have some similar parts in our cars? I know that last year there was a gap there and it didn't look right then. Now that I am looking at my list of things to do this year - and photos of other TR7's - none of them have that gap and wonder how I can fix it...

As for the DPO - he did nothing with the car - it had the original shocks and struts on it (not to mention undercoating on the springs), so I know they were original to the vehicle and from my summation there is nothing there that should have this thing "in the air."

Can a spring shop lower these springs or should I go for another set of lowering springs? Or just take the thing up to a spring shop and see if they can take 13/16" off of them?












1980 TR7 Spider

silverseven
TRemendous
Posts: 4451
Joined: 11 Dec 2003 23:44
Location: Canada
Contact:

Postby silverseven » 26 Feb 2010 01:24

Frank I felt the same as you a couple of years back when I figured I was doing a good thing by replacing my original shocks and springs with OE style replacements (county shocks & inserts with standard springs)
My car used to have a beautiful stance lower than anybody elses I knew at the time......untill I did the replacement and discovered the "h[:0]rr[:0]r" of how high these cars must have originally sat (it imho resembled a 4x4)

It did eventually settle a tad, but it's still to far up there.....fortunately I have since developed a rattle in the rf shock, (those county shocks are pure rubbish as they wallow like a fishing boat) I recently bought a set of KYB's to go with a previous ebay purchase of some lowering springs....so she should have a better look and drive by this summer.

Ron.

ImageImageImage

Frank Thomas
Wedgling
Posts: 15
Joined: 17 Mar 2009 23:46
Location: USA
Contact:

Postby Frank Thomas » 26 Feb 2010 01:58

Ron,

I have the KYB struts in the front and KYB Gas-A-Just in the rear and I have been very happy with them. That was to replace the OEM ones that were on the car, for which the front drivers side strut was completely shot.

I think I might get a set of lowering springs for the back and see if it helps. At least I know that when I am looking at my car there are others who have seen this!!


1980 TR7 Spider

PeterTR7V8
TRemendous
Posts: 2914
Joined: 10 Jun 2008 02:22
Location: New Zealand
Contact:

Postby PeterTR7V8 » 26 Feb 2010 03:40

In the suspension tuning article I posted a few weeks ago they noted that gas struts raised the rear of the test car also. They compensated by setting the front ride height to 13.5".

http://www.forum.triumphtr7.com/topic.a ... C_ID=11509 - see part 2.

Image

Hasbeen
TRemendous
Posts: 6474
Joined: 28 Apr 2005 12:32
Location: Australia
Contact:

Postby Hasbeen » 26 Feb 2010 03:43

Yes Frank, any good spring shop, [make sure you check their
reputation], will be able to lower those springs free length for
you. Doing this also retempers the spring, back to close to
original rate. With these springs, heavy duty shocks, & poly
bushes, this car is a dream on our country back roads.

As stated earlier, I had to do this, on this 7, just to bring it
down to the same height as the other 2 I had at that time. The rear
bumper was so high, it looked silly. With a good look, but not
hours under there with a tape, my son, & I could not find a reason.

I would not like to go lower than that, on stock suspension. I did
have a set lowered another 5/8" lower, but when I put them in, I
was sure they would fall out, sooner or later.

I did not want to muck with spring retaining gear on this car, which
is a daily driver.

I have an 8, which is 1.5" lower all round. As I didn't like the
other options of spring retention, I got a set of repairable gas
shocks. I tried to get some, of suitable performance, with a
shorter length, on full extension.

I could not find any, so I took these apart, & fitted 1.5" of
internal rebound rubber stop. This goes around shaft, internally
above the piston, reducing the shock's full extension. Effectly,
the lower trailing arm can not drop so low, & the spring can not
become loose.

This was the only way I felt happy with, to lower the car, & retain
the spring. Other systoms did not appeal to me.

There is a funy side to this. If I park the 8, all lowered, with
it's big exhaust system, on the lawn, beside the shed, after a run,
the heat from the exhaust will burn the grass in 2 strips, 2 inches
wide, & about 2Ft long. I have to give it half an hour to cool down
on the drive, before parking there, if I want to keep the lawn.

Hasbeen

FI Spyder
TRemendous
Posts: 8920
Joined: 03 Jul 2006 19:54
Location: Canada

Postby FI Spyder » 26 Feb 2010 17:46

My Spider sits low and I replaced the front springs with standard and the front is now a little higher but still lower than rear. 90,000 miles.

Yellow TCT although a year and a half older has only 30,000 miles and sits higher than the Spider both front and rear. (visually, haven't measured the actual height).

Interesting conflicting difference given varying ages and milage and given the mix of old and new parts. Seems some cars sit higher and some lower.


TR7 Spider - 1978 Spifire - 1976 Spitfire - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra
Image

Beans
TRemendous
Posts: 7823
Joined: 15 Mar 2006 19:29
Location: Netherlands
Contact:

Postby Beans » 26 Feb 2010 22:53

If the cars stance looks like this ....

Image

with springs that look like this ...

Image

You probably have the uprated springs as supplied by Rimmers to VB ...

I haven't got a clue what spring rate they are as they came with the car, I ditched them as soon as possible [:I]


<center>Image
<font color="blue"><i>1980 TR7 DHC (my first car, currently being restored)
1981 TR7 FHC Sprint (better known as 't Kreng)</font id="blue">
<b>[url="http://www.tr7beans.blogspot.com/"]<u><b><font size="2"><font color="red">My Weblog</font id="red"></font id="size2"></b></u>[/url]</b></i></center>

Frank Thomas
Wedgling
Posts: 15
Joined: 17 Mar 2009 23:46
Location: USA
Contact:

Postby Frank Thomas » 27 Feb 2010 01:03

Beans - Great looking car - thanks for posting those pictures. I am going to take some photos of the 7 and post them tomorrow for everyone to look at. It might be easier to show what is going on. For the record, my Heavy Duty springs aren't yellow - they are black.

The latest is this - I contacted my local spring shop (oldest here in Richmond, VA) and they wouldn't touch cutting the 13/16" out of my springs. So, I called TSI and I ordered a set of the lowering springs to see if that will help.

I also agree with FI Spider - (also greetings to another owner - mine is #704) as all of us seem to have differing heights for our cars, considering their age and mileage. You would just think that we would all be somewhat close in ride height...there is really nothing special between those arms and the body, except the spring...right??? [:0]

Thanks to all so far...more to come.


1980 TR7 Spider

Beans
TRemendous
Posts: 7823
Joined: 15 Mar 2006 19:29
Location: Netherlands
Contact:

Postby Beans » 27 Feb 2010 09:11

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Frank Thomas</i>

Beans - Great looking car ...<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
That car is no more, used it to re-shell my first car, very green now.

<center>Image
<font color="blue"><i>1980 TR7 DHC (my first car, currently being restored)
1981 TR7 FHC Sprint (better known as 't Kreng)</font id="blue">
<b>[url="http://www.tr7beans.blogspot.com/"]<u><b><font size="2"><font color="red">My Weblog</font id="red"></font id="size2"></b></u>[/url]</b></i></center>

Hasbeen
TRemendous
Posts: 6474
Joined: 28 Apr 2005 12:32
Location: Australia
Contact:

Postby Hasbeen » 27 Feb 2010 13:09

Frank, they sound like a good spring shop, I would never consider
cutting a spring, either.

What I suggested, & have done with mine, is have the spring reset to
a lower free length.

This involves bringing thr spring up to red hot, as in manufacturing
the thing, resetting the free length, then retempering the thing,
as it cools. This gives a new ride height, at the same spring rate
as stock.

This is done a lot in Oz. Our springs don't rust, or wear, [much],
but do loose their set, with age. This is common with old leaf
springs. I have 3 spring works within 50Km of me, who can do this.

Hope the new springs do the job for you.
Hasbeen

Post Reply

Who is online

Users browsing this forum: No registered users and 67 guests

cron