DaveR

Hello MichaelH, I agree it's the torque that generally is the problem with the Standard 8 based diffs. No matter if it works for you then no problems. Dave

Hello MichaelH, I would guess it had some serious up grade work done on it. Dave

Hello Dave, Yes the 4.875 was also used in the Atlas van along with the 948cc Standard 10 and Herald engine in low compression form! Dave

The standard 3.89 is the light duty axle used on the small chassis cars. e.g. GT6, Vitesse 2 Litre, Spitfire Mk4, Dolomite 1500. Ok for normal road use in those cars, but not competition. The standard 3.9 is a heaver duty axle and was used on the 5 speed TR7. The standard 4.875 axle was used in Herald 948 Saloon and Standard Eight. Again light duty. Other rations were- The standard 4.55 axle was used in the Herald 948 Convertible/Coupe and Standard 10. Again light duty. The standard 4.11 (Different from 4.1 axle) axle was used in Herald 1200, Herald 13/60, Spitfire up to M

Rob +1

I agree with Rob's approach. However, if you are having difficulty locating the source of the problem can a suggest the following. One of the known problems with the TR7 electrical system is the multi-way connectors. They can corrode and create a resistance which prevents the relevant device operating correctly. It's a good idea to clean the plugs/sockets and apply some silicon grease. Firstly look at the ones that feed the indicators/lights. Dave

I have had one for many years and agree with Bob you can't balance carbs with it and as Rob says it is very sensitive to changes. It does take some patience to get meaningful results. Over the years I found it useful getting a car that is subject to an emissions test through the MOT. It's the final check. Most of the 1950/60's Triumphs weren't designed to run a mixture much less than 4.5% so keep a modern carb tuner away from your car. It is does give a useful final check but you still need the time honored methods of setup twin carbs. The smell may well be the float chambers

I don't use it in any of my Triumphs as it's qualities and benefits are unknown to me. If the problem is over heating then find out why. Dave

First, a Happy New Year to all. In more recent years I have become used too just working on a Vitesse or GT6 where you can sit on the front tyre and get at the distributor, I had forgotten just how difficult it was to get at the one on 7. So the thoughts have turned to fitting an electronic ignition. But like most things in life there is the catch. Most electronic ignition's are designed for Lucas 22/25/45 or the earlier Delco type of distributor where the parts fit over the cam. But with the 7's distributor the advance weights are above the cam and therefore prevent this. So is ther