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Ribenapigeon |
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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Ribenapigeon |
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Ribenapigeon Super Spammer
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Polarbear |
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Polarbear Super Spammer
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weasley |
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weasley World Chat Champion
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Pete. |
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Pete. Super Spammer
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Posted: 14:09 - 30 Oct 2019 Post subject: |
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Fuel injection normal behaviour.
The air intake temperature sensor tells the ECU what the air temperature is and the ECU derives air density from that and adds or removes fuel accordingly. Lower temperature = more dense air = more oxygen molecules = more fuel required. ____________________ a.k.a 'Geri'
132.9mph off and walked away. Gear is good, gear is good, gear is very very good |
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weasley |
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weasley World Chat Champion
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Ribenapigeon |
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Ribenapigeon Super Spammer
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ThunderGuts |
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ThunderGuts World Chat Champion
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steve the grease |
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steve the grease Crazy Courier
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The Shaggy D.A. |
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The Shaggy D.A. Super Spammer
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Posted: 18:43 - 30 Oct 2019 Post subject: |
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Try a tinfoil wrap on the radiator for a tankful, and let us know ____________________ Chances are quite high you are not in my Monkeysphere, and I don't care about you. Don't take it personally.
Currently : Royal Enfield 350 Meteor
Previously : CB100N > CB250RS > XJ900F > GT550 > GPZ750R/1000RX > AJS M16 > R100RT > Bullet 500 > CB500 > LS650P > Bullet Electra X & YBR125 > Bullet 350 "Superstar" & YBR125 Custom > Royal Enfield Classic 500 Despatch Limited Edition (28 of 200) & CB Two-Fifty Nighthawk > ER5 |
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Sister Sledge |
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Sister Sledge World Chat Champion
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Ribenapigeon |
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Ribenapigeon Super Spammer
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MattJ |
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MattJ World Chat Champion
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Ribenapigeon |
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Ribenapigeon Super Spammer
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Fizzer Thou |
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Fizzer Thou World Chat Champion
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Ribenapigeon |
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Ribenapigeon Super Spammer
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Polarbear |
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Pete. |
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Pete. Super Spammer
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Phoenix |
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Phoenix Twisted Firestarter
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Teflon-Mike |
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Teflon-Mike tl;dr
Joined: 01 Jun 2010 Karma :
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Posted: 08:30 - 02 Nov 2019 Post subject: |
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Sister Sledge wrote: | The radiator wrapping thing was for when engines didn't have thermostats. Engines could never get to temperature in cold air and wrapping the radiator a little would help the engine get hotter and therefore run better.
People doing it to modern engines with thermostats will be the same people who beat carpets on a washing line each springtime. It's pointless with modern stuff. |
Morris Minor's have a thermostat. Mini's with the same A-Series engine have a thermostat. folk blanked off the rad still.... On Minor there was a tendency to remove thermostats, especially in summer and or if towing, to raise the temp they boiled over at, hence blanking off the rad in winter to manually regulate engine temps, a bit. On Mini's with the engine mounted across the engine bay and the radiator up against the wheel arch, the cooling was a little overly good, for a 40bhp engine, so they would take heck of a long time to warm up in winter, hence rad-blanking, but mope often they got tin fol over the grill, NOT to stop air-flow through the rad, but to shield rain water from the Distributor shorting the HT leads and causing miscellaneous mis-fire.
On Land-Rovers and for a lot of North-American cars, you used to actually be able to buy 'Rad-Muffs' that hung over the radiator grill, and had flaps you could roll up or drop down to help regulate air-flow, hence cooling. On the Landy, it was mostly rather like the mini, and the cooling was set up; for tropical climates so as to not over heat, so in typical UK summer, sorry, winter, they never got up to temperature, and the muffs were sold as an economy aid to reduce time on choke. On North American cars and trucks, the range of climates they could be expected to work in was from the burning desert of Arizona to the frozen waste lands of Alaska... or Canada.... so again, the cooling tended to be arranged on the conservative side and, especially with a big, as in 5litre engine, not thrashed very hard or very often to get it warm, they never would. Hence muffs used to aid warm-up.
These days... most cars are front-=wheel drive and have transverse mounted engine like the old Mini, BUT the cooling radiators have usually been portioned conventionally 'in-line' behind the grill, with an electric fan, that doesn't depend on the engine and a belt to drive it.
B-U-T, probably the most significant 'thing' is cheap plastic mouldings.
The old mini or Landy, had a bit of bent tin bolted to a pulley that drove the water-pump. It was neither very effective, or particularly efficient. With the advent of electric fans came injection-moulded fan blades that could easily and cheaply have an aerofoil section and shift an awful lot of air for their diameter and speed. The same cheap plastic mouldings also allowed radiators to be shrouded and engine bays ducted for much more efficient air-flow.
Curiously, the technology in the trusty car thermostat has NOT significantly changes much. Essentially a spring loaded pin expands with temperature to open the port to let more water flow. It has never been particularly elaborate or sophisticated, or even accurate.
Fuel injection, is another matter. In the fuelling 'map', there is basically a set of instructions to =over ride or lift the base map, and enrich the fuel/air ratio when the engine jacket, and/or air temperature is cooler, to replicate what an old fasioned 'Choke' did.
This then begs a couple of conundrums.
In days of yore, in the UK, in moderately 'usual' weather, there shouldn't have been any need for rad masking. It was most often a bodge to get around a silted up rad and or dodgy thermostat. On a more modern, carburated car, it still shouldn't be particularly needed, and the cooling system should be a lot more efficient and not need any help, if in good order.
While on anything with EFI, the electric brain should effectively automatically compensate, and rad masking REALLY shouldn't be needed.
On a bike engine, with a typically small rad to start with, and these days optimised most often for warmer climes, and summer only use, there REALLY should be no need, and blanking the rad is a good way to risk overheating when you do open the taps.
Yup. With the colder weather you will spend more time on choke, or with the EFI enriching the mixture, and you will likely be gingering the throttle a bit more in reduced grip. Which could account for the better summer MPG recorded. BUT if you have more serious issues, it suggests that there is something 'wrong' with the bike, and like the old Morris Minors, rad-blanking is NOT a fix for that, its a bodge. ____________________ My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
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weasley |
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weasley World Chat Champion
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Polarbear |
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Polarbear Super Spammer
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Phoenix |
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Phoenix Twisted Firestarter
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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Old Thread Alert!
The last post was made 4 years, 227 days ago. Instead of replying here, would creating a new thread be more useful? |
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