tr7triumph.com

Anybody done? Worth-it? Thanks, roverman.[?]

Art Gertz

<font size="2"><font face="Comic Sans MS"> TRS (Triumph Rover Spares)http://www.triumphroverspares.com.au/page.asp?parentid=40&productid=34 in Adelaide Australia will sell you a lovely Independent Rear Suspension set up, the only catch is that the cost is measured in cubic dollars!
<center><font size="6">$$$³</font id="size6"></center>[:D] </font id="Comic Sans MS"></font id="size2">

80'Triumph TR7, , 73'Land Rover (Ford 351. V8),
'89 Ford Fairlane
85'Alfa 90, 69'Ford F250.
76' Ford F100

It's only Aussie $$ tho so take the square root. [:D]

The price is actually pretty reasonable for what you get. A Quaife LSD alone would be a fair proportion of that once fitted. I'd guess it would be more useful for rallying than circuit racing but would it pass scrutineering for a classic entry?

You might think that Triumph put a lot of time & thought into going back to a live axle for the TR7. Truth is, having spent all the money developing IRS for Spitfires, Heralds, GT6s etc & getting zero appreciation for it they gave up and used the pretext that the Americans preferred a simpler design. [:)]




Never say die. At least not while you're still breathing.

I don't think the TR6 did much to help the concept of a IRS. Squating and severe camber change seem to be the bigest problem. Fella here in the states has a modification to correct the camber and uprated springs help the squat. But in stock form they were arguably worse than a straight axle TR4.

Jim Underwood
72 MGB BRG
80 TR8 Persian Aqua
If women don't find you handsome, they should at least find you handy.

its better to use a good live axle setup than a bad IRS.

i don't know on what is this IRS based on , but if i had to build a rear suspension i would cost a lot more than 2500 euro.

count in that the quaife diff is 600 euro.

-halfshafts are 99.9% from a some stock car because machining and heat treatment to produce custom made is very high

bushes, bolts,washers,nuts , wheelbearings (around 50 euro per piece , 2 per wheel) , disc brakes, calipers


i dont know if the shocks and springs are in the price as well.

so considering the ammount of "stuff you get" this is cheap.

if you calculate it by the weight of material per dollar , thats still cheap.


on the other hand , considering the ammount of work ( design, knowledge) needed to build a suspension.

and in "build a suspension" i mean.

analysis of the front suspension and its characteristics as in:

-roll centar location
-camber,castor,toe curves trough roll, pitch and steer.
-suspension and bush stiffnes
-spring stiffness and natual frequencies
-shock absorber bump and rebound, their curves.

and then use that data and cornerweights of the car,

to build all that data again for the rear.

and design and fabricate the strong enough and stiff enough suspension that could pass MOT or scruteneering for a racetrack or a race.

if i saw 1 rod end stressed in bending on that as a scruteneer i wouldn't let you on the track ,no matter how thick it was.

I bought a 94 Miata rear end to put in my TR7. It is a decent rear end, but I am afraid that it will not be able to handle the power from the mighty 4g63 Mitsu engine. So I think that I will instead go with a Mustang solid axle rear end.

However, I still think that Miata IRS is a good option with many upgrades. Check out my photos if you want to see what it is like.

Leon
'94 Eagle Talon AWD Turbo 613whp <powered by Mitsu 4G63T
'80 TR7 Spyder GS-T <undergoing Mitsu 4G63T transplant
http://www.cardomain.com/ride/2472999