tr7triumph.com

Hi all.
I have an Australian delivered car that was fitted from new with twin Stromberg carbs. Now I'm much more used to SU carbs & never had a car fitted with these before.
A previous owner (I assume)has fitted a single choke cable that only works on the front carb, well it would do if it wasn't seized. So I have trouble starting it and it idles to fast, so I need to replace it.
SUs have right & left handed carbs & use a single cable on the connecting linkage. The Strombergs are both the same. so no connecting linkage.
Can anyone please advise if this is correct or has an incorrect one been fitted? If correct, then how are both chokes operated?
None of the books, manuals or pictures I can find show enough detail to help me.
Thanks guys & gals.


Scotty, South Australia.
1978 TR7 2.0 LT77
1981 XJS

I have that setup too; it was installed many years before I got the car. The choke only operates on the front carb. Apparently that is all you need, because it works well, once you get the feel for it. In the cover plate on the side of the carb there is a very small opening that allows extra fuel into the intake. You can pull that cover and clean it all up in there.


[/img]
1980 Pageant Blue DHC with removable hardtop.

I have one TR7 set up with just the front choke as well. It starts well but is a bit cold blooded in the winter even in California.

Edward Hamer
Petaluma CA

I have the dual cable choke mechanism on Yellow TCT so both are choked.



- - -TR7 Spider - - - 1978 Spitfire- - - - 1976 Spitfire - - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra - Yellow TCT

I have the twin cables on the usual choke knob set up on my 7 with SUs. One of my 7s that had Strombergs had twin cables & the other had a spindle link. I think it was identical to the throttle spindle link.

One of the original cables had stranded, & I got the full set up new from Greg Tunstall in Brisbane.

I would think your specialist in Adelaide would be able to get the replacements for you. If not try Tunstall, or the usual suspects in the UK.

Hasbeen

My 1980 TR7 had a manual choke installed when I bought it. It has a split cable to choke both Strombergs. I drove the car all winter without any starting problems, it was a little cold natured at times... I say winter but I live in southern Texas...

Troy
1980 TR7 DHC
1980 TR8 DHC

Thanks for the information guys.
So it sounds like the setup I have might be correct after all. So I'll start looking for a twin cable to set the chokes up properly.
Cheers, Scotty.


Scotty, South Australia.
1978 TR7 2.0 LT77
1981 XJS

My 76 TR7 had just the front carb choked but I took it back to the dealer and told them to fix it so they both worked that way. This was right at the switchover point between the 76 and 77 cars, and what the dealer installed was essentially the standard "later" linked choke hookup. Never caused any problems - wish I had it on my TR8...

- Steve Richardson
St Louis MO
80 TR8
76 TR7

It will probably need more than just the double cable. My rear carb doesn't have the cover or connection to just attach a choke cable to it.


[/img]
1980 Pageant Blue DHC with removable hardtop.

Scotty:

What year was your car?

79TR7 do not come equipped with chokes (exactly)…instead they’re equipped with an item (on the front carb) called a FASD (Fully Automatic Starting Device). I assume all TR7 are equipped with these items.

They are operate like mechanical carburetors that inject additional gasoline into the engine when its cold…increasing the fuel ratio like a choke (but dosen’t do it by cutting off air like a choke does...it add gasoline and holding air constant).

When the FASD work…they work very well. A lot like a modern car with fuel injection. The problem is they operate using a wax valve that goes bad and it stops working. The solution is to replace the wax valve with a mechanical lever (like a choke lever). British Victoria sells the FASD replacement lever.

The replacement lever works very well…although you need to do a little modification… I’ve installed it on my 79 TR7 and it works like a dream. On cold mornings…I pull the lever, pump the pedal twice and start the engine and take off. Just like a modern car with fuel injection. After the engine warms up I push in the lever and that’s it…pushing the lever in has no effect once the engine is war.

When the engine is cold, the lever increase idol...it stays that way until you push the lever back in.

You save a lot of gas (and time) not having to wait for the car to warm up…and works much better than a “traditional chokeâ€￾.

I should say, there are no replacement parts for FASDs…except the British Victoria cable. Many previous TR7 owners that had problems with starting remove the FASD…because they didn’t understand how it worked…there are no manuals except what’s on the internet. There is nothing in the Hanes manual on the FASD either.

There are a few sites…that explain very well how they work, how to fix them…do your homework.

Here’s the link…to show you what an FASD looks like…its long

http://www.google.com/url?sa=t&rct=j&q= ... ehBaYpdeuQ

or google "FASD SD1"…the rover SD1 is the only other car that was ever equipped with an FASD

if your problem is the FASD (or a missing one)...its worth fixing and or replacing...it makes your car run better than any choke equipped triumph you've ever driven.

good luck
-V
79TR7

here's a better link:
www.roversd1.nl/sd1web/fasd.htmlý

Scotty your car is OZ spec so thankfully it won't have That stupid FASD piece of rubbish, that only applies to US spec cars (I duuno but, maybe Canada too)
You might find a double choke cable on some other ZS equipped pommy cars from the 70s. I know some Jags had them


"Keep calm, relax, focus on the problem & PULL THE BLOODY TRIGGER"

80'Triumph TR7, 73'Land Rover (Ford 351. V8),
'89 Ford Fairlane
'98 MG-F, 69'Ford F250.

Hi Vino 79.
My car is an Aussie spec 1978. I have that in my signature. It doesn't have the FASD device thankfully.
<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 Vino79TR7</i>

here's a better link:
www.roversd1.nl/sd1web/fasd.htmlý

<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">


Scotty, South Australia.
1978 TR7 2.0 LT77
1981 XJS

Was there such a thing as an Aussie spec. TR7 or did they get whatever was coming off the end of the production line?


- - -TR7 Spider - - - 1978 Spitfire- - - - 1976 Spitfire - - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra - Yellow TCT

Yes, there was an Oz spec, as we have the ADRs ( Australian Design Rules )
Back in the day of the TR-7, these ADRs required unique to Oz emissions standards and a whole lot of other stuff such as side intrusion bars in the doors etc.

"Keep calm, relax, focus on the problem & PULL THE BLOODY TRIGGER"

80'Triumph TR7, 73'Land Rover (Ford 351. V8),
'89 Ford Fairlane
'98 MG-F, 69'Ford F250.