09-11-2017, 07:58 PM
(This post was last modified: 09-11-2017, 08:01 PM by Hugh Barnes.)
Yes Erich. I think that's how SUs developed - early versions had heavy pistons and no spring (my pistons both weigh exactly 251gr) - later versions were light pistons and a spring. I think that probably indicates a cost saving rationale.
The ignition on this model of Riley Ian, is a magneto and has a hand advance/retard like earlier Austin 7s. I run the car fully advanced but thats where it develops maximum power, as established when setting it up on a rolling road.
I have tracked down another twin carb inlet manifold and will collect that tomorrow and fit it to see it that makes any difference. I've got to start eliminating things, even if I think its unlikely to be the culprit. I'm also going to try and prove there hasn't been any failure of the gaskets between the carbs and manifold...
Oh, and the pump is ok - it clicks away quite happily and, as you suggest Dave, you can see it register on the ammeter...
I'll try some new fuel as well, but the fact that when it does run, it runs perfectly, I think that less likely, but it's another thing to try and eliminate...
thanks all...
The ignition on this model of Riley Ian, is a magneto and has a hand advance/retard like earlier Austin 7s. I run the car fully advanced but thats where it develops maximum power, as established when setting it up on a rolling road.
I have tracked down another twin carb inlet manifold and will collect that tomorrow and fit it to see it that makes any difference. I've got to start eliminating things, even if I think its unlikely to be the culprit. I'm also going to try and prove there hasn't been any failure of the gaskets between the carbs and manifold...
Oh, and the pump is ok - it clicks away quite happily and, as you suggest Dave, you can see it register on the ammeter...
I'll try some new fuel as well, but the fact that when it does run, it runs perfectly, I think that less likely, but it's another thing to try and eliminate...
thanks all...