1970 Duster project in Sweden
Here is a little update. When I have had the time I have been working on crossing of things on my "to do list". I have been taking it for longer and longer test drives too. Recently I have been working on the cooling system because the temp crept up when idling. When driving the temp would stay around 180, but when stopping and idling it would creep up and I would shut it off at 215. Yesterday I did some tuning with a timing gun and a vacuum gauge. I had about 18* initial timing when starting. I increased the initial a little and it picked up rpm and vacuum. I backed the idle rpm's back down and did the process again until I had reached a peak vacuum on the gauge and the engine would no longer pick up rpm. I then backed the initial off just a touch and it is now at 25*. I have the distributor set so it can get a total of 37* total timing now. It was a very hot day yesterday, while idling and driving around very slow the temp now stay at 194 and when cruising it's at 179. I did nothing with the carburator yesterday. The AFR is at around 12.5 at idle and cruising at the moment. It's the Edelbrock AVS 650 out of the box. Would you call that a little rich?
So it seems to like this initial timing, I have no problems starting the car at all after shutting it off hot, and starting it again after 15 minutes.
I don't have a clutch fan, I have a 18" Derale flex fan at the moment, and a repro fan shroud that doesn't seal very well. So there is room for improvement. I have a stock 22" radiator that I have flushed 3 times with it out of the car with citric acid. I think I want to go with a stock replacement clutch and fan. Could anyone point me in a direction where I can get that and what would work on my car? Should I measure from the water pump to the radiator to know exactly what I need or is there a stock replacement fan and clutch?
Here is a little update. When I have had the time I have been working on crossing of things on my "to do list". I have been taking it for longer and longer test drives too. Recently I have been working on the cooling system because the temp crept up when idling. When driving the temp would stay around 180, but when stopping and idling it would creep up and I would shut it off at 215. Yesterday I did some tuning with a timing gun and a vacuum gauge. I had about 18* initial timing when starting. I increased the initial a little and it picked up rpm and vacuum. I backed the idle rpm's back down and did the process again until I had reached a peak vacuum on the gauge and the engine would no longer pick up rpm. I then backed the initial off just a touch and it is now at 25*. I have the distributor set so it can get a total of 37* total timing now. It was a very hot day yesterday, while idling and driving around very slow the temp now stay at 194 and when cruising it's at 179. I did nothing with the carburator yesterday. The AFR is at around 12.5 at idle and cruising at the moment. It's the Edelbrock AVS 650 out of the box. Would you call that a little rich?
So it seems to like this initial timing, I have no problems starting the car at all after shutting it off hot, and starting it again after 15 minutes.
I don't have a clutch fan, I have a 18" Derale flex fan at the moment, and a repro fan shroud that doesn't seal very well. So there is room for improvement. I have a stock 22" radiator that I have flushed 3 times with it out of the car with citric acid. I think I want to go with a stock replacement clutch and fan. Could anyone point me in a direction where I can get that and what would work on my car? Should I measure from the water pump to the radiator to know exactly what I need or is there a stock replacement fan and clutch?