Joined: Aug 2017 Posts: 923 Threads: 52
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Location: The delightful town of Knaresborough, North Yorkshire
Difficult to explain for certain Ruairidh, but probably the air under the bonnet today was cool and damp, with light rain and short distances. Last time it was out the temperature was around 20 degrees, and on a longer journey with stop-start traffic the underbonnet temp would be high.
There are so many factors. Today I filled up with petrol half a mile from home, so the petrol would be colder. Who knows, lots of things to make a difference.
Whatever, I'm happy if it sometimes goes that well. After the last trip I was seriously thinking of squeezing an A-series into it!
Joined: Mar 2015 Posts: 5,188 Threads: 223
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Location: Scotchland
Your top speed, as quoted above, is low Andrew.
The car should sit comfortably at 40-45 mph, even in your neck of the woods.
Joined: Aug 2017 Posts: 2,927 Threads: 160
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Location: Sherwood Forest
Car type: 1938 Talbot Ten Airline
Maybe it's the difference between side-draft and up-draft Zeniths; my experience with the RM is the same as Dave's - faster and more economical the hotter it is - although I'm talking English hot, not Continental hot!
Joined: Mar 2015 Posts: 5,188 Threads: 223
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Location: Scotchland
The only real difference between my cars and the ones you and Dave have, Mike, is that all mine have the smaller radiators, with the exception of the Pearl...
Joined: Aug 2017 Posts: 2,927 Threads: 160
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Location: Sherwood Forest
Car type: 1938 Talbot Ten Airline
I thought you'd got an SU on the chummy?
Joined: Aug 2017 Posts: 923 Threads: 52
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Location: The delightful town of Knaresborough, North Yorkshire
Seem to remember yours have a slightly lower-geared diff too Ruaridh?
Joined: Mar 2015 Posts: 5,188 Threads: 223
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Location: Scotchland
The Chummy runs a 5.25:1, as fitted to most RMs and RNs Andrew.
Joined: May 2018 Posts: 2,797 Threads: 533
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Location: Peak District, Derbyshire
Car type: 1929 Chummy, 1930 Chummy, 1930 Ulster Replica, 1934 Ruby
Water injection works - but only I believe on turbocharged engines. I had a Fiat Uno Turno once and fitted it with the water injection and an adjustable, higher boost. The water certainly made a significant improvement. I sold it before it blew up.
Joined: Aug 2017 Posts: 1,449 Threads: 21
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Location: The village of Evenley
Car type: 1934 Austin Seven RP Deluxe
03-07-2021, 08:36 PM
(This post was last modified: 04-07-2021, 09:07 AM by Ivor Hawkins.)
Andrew, I would have said the performance of your Ruby is far from normal, it should go a whole lot better than that.
I think a day looking over all the basics like compressions, timing (cam as well as ignition) mixture or as they say these days, air/fuel ratio and things such as dragging brakes.
No standard Seven can be described as a road burner, but it should toodle along a better bit than you describe.
