SWB Posted April 3, 2017 Share Posted April 3, 2017 Been given a military 8 bladed fan and all the pulleys. Will 8 blades give more cooling than the standard 4?. Quote Link to comment Share on other sites More sharing options...
steve b Posted April 3, 2017 Share Posted April 3, 2017 Yes , but spec'd for the FFR I think , where they would be run on the hand throttle in high ambient temps . For ordinary use it should not be necessary and will suck up HP . A std. set up with all the rad cowling should work very well Steve b Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 3, 2017 Share Posted April 3, 2017 Standard will be fine! More than fine... Quote Link to comment Share on other sites More sharing options...
SWB Posted April 6, 2017 Author Share Posted April 6, 2017 Many thanks for your replies, Steve, what's HP?, excuse my ignorance. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 6, 2017 Share Posted April 6, 2017 HP = horsepower Quote Link to comment Share on other sites More sharing options...
neil110 Posted April 7, 2017 Share Posted April 7, 2017 From my days "in" and sepia tinted memory. All Green fleet Land Rovers had 8 blade fans. You could hear them coming from a distance because of the roar from the fan Quote Link to comment Share on other sites More sharing options...
Romahomepete Posted April 10, 2017 Share Posted April 10, 2017 Unless you have the radiator cowl on I would remove the fan altogether and fit an electric fan in front of the rad. The unprotected belt driven fan has a habit of attacking peoples fingers. Quote Link to comment Share on other sites More sharing options...
Snagger Posted April 13, 2017 Share Posted April 13, 2017 On 10/04/2017 at 2:15 PM, Romahomepete said: Unless you have the radiator cowl on I would remove the fan altogether and fit an electric fan in front of the rad. The unprotected belt driven fan has a habit of attacking peoples fingers. Engine driven fans are superior to electric, but they do depend on the cowl being fitted, otherwise you just stir a torus of air behind the rad instead of drawing air through it. Quote Link to comment Share on other sites More sharing options...
SWB Posted April 21, 2017 Author Share Posted April 21, 2017 Thanks for the info, was hoping that fitting an eight bladed set up would alleviate fuel evaporation. Quote Link to comment Share on other sites More sharing options...
simonr Posted April 22, 2017 Share Posted April 22, 2017 On 4/13/2017 at 3:18 PM, Snagger said: Engine driven fans are superior to electric, Despite being a previous seller of electric fan kits - I completely agree with this! A direct driven or viscose (preferred) fan can draw the equivalent of 10Hp (7.5kW) from the engine. Compare that to even the most powerful electric fans at 2/3Hp / 500W and you see why an engine driven fan will provide way more cooling. There is an argument that in cooler places like the UK you don't need that much cooling - until you do! Si Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 22, 2017 Share Posted April 22, 2017 8 hours ago, SWB said: Thanks for the info, was hoping that fitting an eight bladed set up would alleviate fuel evaporation. It may well help with this, but you should try be getting fuel evaporation on a standard 2.25... What's your fuel pump, carb and exhaust set up? Quote Link to comment Share on other sites More sharing options...
Snagger Posted April 22, 2017 Share Posted April 22, 2017 1 hour ago, simonr said: Despite being a previous seller of electric fan kits - I completely agree with this! A direct driven or viscose (preferred) fan can draw the equivalent of 10Hp (7.5kW) from the engine. Compare that to even the most powerful electric fans at 2/3Hp / 500W and you see why an engine driven fan will provide way more cooling. There is an argument that in cooler places like the UK you don't need that much cooling - until you do! Si I remember Pete telling me on an Atlas Overland tour about a 90 that kept overheating on a Moroccan trip. It turned out that the owner had remove the fan, with no electric replacement, on internet advice, and was insistent that "Tdis don't need fans"! Quote Link to comment Share on other sites More sharing options...
Snagger Posted April 22, 2017 Share Posted April 22, 2017 9 hours ago, SWB said: Thanks for the info, was hoping that fitting an eight bladed set up would alleviate fuel evaporation. The four bladed fan should be ample. The eight bladed fan was for prolonged idling, where low engine rpm didn't draw enough airflow. That is why it was generally only used on vehicles that powered electrical equipment, like MoD FFRs, or farm machinery. However, many Series vehicles are missing the cowl that attaches to the rad because of owners and bad garages botching a rad replacement (too lazy to fit the screws, or too lazy to replace lost or damaged screws). Without the cowl, the fan just stirs the air behind the rad, in a torus (doughnut) around the ends of the blades instead of drawing cool air in through the rad and passing out the back of the fan over the engine and manifolds. So, if your cowl is missing, that's the problem. Quote Link to comment Share on other sites More sharing options...
Davo Posted April 22, 2017 Share Posted April 22, 2017 Been there, done all that, and an 8-blade fan is too much. I've got one and it doesn't help with the power from that poor little motor. A good quality electric fan would be far better. I've had plenty of trouble with fuel vapourising. It shouldn't happen in a mild climate. In a hot climate like where I live, I would be inclined to put in a return system like the V8 has with an electric pump, but that's extreme for anywhere else. (Of course I haven't actually managed to get around to doing it yet!) Quote Link to comment Share on other sites More sharing options...
SWB Posted April 23, 2017 Author Share Posted April 23, 2017 On 22/04/2017 at 8:10 AM, Bowie69 said: What's your fuel pump, carb and exhaust set up? 2.25 petrol engine, mechanical fuel pump, Weber carb with a stainless steel exhaust system. Fan cowl bought early last year and fitted. Fuel evaporation occurs when been out for a run and parked up, will start and drive for 100 yards, then it's bonnet up and manually pump fuel pump, (new unit fitted, still the same as the old one). Quote Link to comment Share on other sites More sharing options...
steve b Posted April 23, 2017 Share Posted April 23, 2017 Is there any form of insulator block between the carb and manifold ? Also , when it stops as you describe how many pumps on the prime lever to get it going ? What happens if you leave it ticking over upon re-start after a run ? cheers Steve b Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 23, 2017 Share Posted April 23, 2017 I'm unsure why there would be enough heat to vaporise fuel at the pump or before, does the fuel line follow a normal route? Is there potentially damage to the line (pinhole) before the pump meaning it has a hard time when hot pumping fuel? Quote Link to comment Share on other sites More sharing options...
Snagger Posted April 24, 2017 Share Posted April 24, 2017 Are you sure you don't have a pin hole leak like Bowie describes, or failed check-valves allowing the fuel to drain back to the tank when the engine is off and making the lift pump weak when running? I'd take a close look at the fuel filter for leaks. The symptoms are very similar to those I and others have experienced with diesels when an air leak allows air into the system. Quote Link to comment Share on other sites More sharing options...
SWB Posted May 1, 2017 Author Share Posted May 1, 2017 Been away for a good few days, now able to catch up. Carb has insulation block, fuel pump and all fuel lines renewed. Fuel disappears in the see through fuel filter near to the carb. Quote Link to comment Share on other sites More sharing options...
Cornish Rattler Posted May 3, 2017 Share Posted May 3, 2017 I used to run my 2a when it was still a 2.25p engine without a fan but kept it in the back helped save fuel and it allowed it to clime hills easier and I did the same when I converted it to a tdi and I will be doing with this one when it on the road Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted May 3, 2017 Share Posted May 3, 2017 Just fit a thermostatic electric fan and then you don't have to carry anything in the back or a set of tools, or have to do anything when you start working hard in warm weather! Quote Link to comment Share on other sites More sharing options...
Snagger Posted May 3, 2017 Share Posted May 3, 2017 4 hours ago, Cornish Rattler said: I used to run my 2a when it was still a 2.25p engine without a fan but kept it in the back helped save fuel and it allowed it to clime hills easier and I did the same when I converted it to a tdi and I will be doing with this one when it on the road Your car, your choice, but it'll likely bite you one day. Fans are fitted for good reason. Quote Link to comment Share on other sites More sharing options...
kkwb01 Posted September 12, 2018 Share Posted September 12, 2018 On 5/1/2017 at 9:50 PM, SWB said: Been away for a good few days, now able to catch up. Carb has insulation block, fuel pump and all fuel lines renewed. Fuel disappears in the see through fuel filter near to the carb. My 2a runs beautifully. In fact daily for 4 years. I once added an in-line fuel filter and suffered fuel starvation so threw it away. They were never intended to have a fuel filter. They have the sediment bowl and mesh filter instead and a mesh on the stand pipe in the tank. The filter is the culprit 100%...... Quote Link to comment Share on other sites More sharing options...
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