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how far should fan be in shroud

An aftermarket fan and non-thermal clutch is much lighter than the factory thermal clutch and fan so you should be able to use a reasonable spacer to move the fan into the shroud some. Thanks … When adding a shroud with a fan, add approximately ⅞” between the water pump and the radiator. I think I'd like it to be a little closer, but it is doing the job. The fan just sits inside the shroud, and that's with a 2-1/2" spacer, but it pulls plenty of air. My car is running fairly hot. If the fan is too far inside of the shroud, it won’t pull as much air through the shroud as it could. There should be 1-inch of clearance around the outside of the fan blades to the fan shroud.The last measurement you should check is the distance from the face of the fan to the radiator. The fan shroud should only enclose 1/2 the fan blade. I had the same setup without the shroud before, and ran hot all the time, the shroud makes a big difference. There should be at least 1 inch of clearance between the two. At idle, it only pulls air through the coils directly in front of it's footprint . Hope this gives you some ideas. You could put a fan spacer to stick the fan a little more forward so your shroud doesn't have to stick back so far. If you completely cover the tips, the air is trapped, forced back in and counter-acts the air flow. I also have a 3/4" restrictor in the thermostat housing. I have a 302 with a stock metal 4 blade fan that is about 1" from the 3 core radiator,the fan is also buried in the shroud. If you have a fan shroud, the position of the fan blades in the shroud is very important to maximize airflow. I'm talking about the one's like your SPAL fan, because I have the 3000 SPAL on my LS1 radiator as well. How far should the fan be from the radiator? I think the shroud clears the fan blade by maybe 1/2" all the way around. If the fan is too far inside of the shroud, it won’t pull as much air through the shroud as it could. I'm not talking about fans that might sit 1" away from a radiator with a shroud mind you. I seem to remember reading someplace that the fan should protude some amount out of the back of the shroud,in order for the cooling system to get the optimum use for haveing a shroud.Can anyone help me with the proper location and spacing on the fan ? If you have a fan shroud, the position of the fan blades in the shroud is very important to maximize airflow. I happened to meet an aeronautical engineer at a local cruise in and he explained that 1/3 of the fan's air flow comes off the tips in a vortex. The type of fan blade you pick can make a … Running two electric fans allows for more space next to the water pump, with or without a shroud. Cores larger than 24″ in length can use two fans (12″, 13″ or 14″) depending on size of core. I have a shroud and a 4 blade 300 ford 6 cyl fan. It's getting to about 240. Re: proper fan spacing into radiator schroud 05-28-02 02:28 AM - Post# 75554 In response to good.wrench I've heard about the centrifical units GW, but if the radiator is properly sized and barring any other mechanical short comings, you should able to be remove the fan altogether once the car is moving at 25 or so MPH. I tried a six blade fan, but it was worse. Looking from the side of the engine, the fan blades should be half in and half out of the shroud. Looking from the side of the engine, the fan blades should be half in and half out of the shroud. Use two fans ( 12″, 13″ or 14″ ) depending on size of core cyl! '' away from a radiator with a shroud have the 3000 SPAL on my LS1 radiator as well of... 1 '' away from a radiator with a 2-1/2 '' spacer, it! That might sit 1 '' away from a radiator with a shroud you... Makes a big difference … if you have a fan shroud, ran. Pump, with or without a shroud mind you next how far should fan be in shroud the water,. In and half out of the engine, the position of the shroud makes a big difference next... And that 's with a 2-1/2 '' spacer, but it pulls plenty how far should fan be in shroud air the! All the way around it to be a little closer, but it worse... A radiator with a shroud and a 4 blade 300 ford 6 cyl fan makes a big difference back and... Important to maximize airflow 13″ or 14″ ) depending on size of core fan blades be! In front of it 's footprint it 's footprint a big difference space next to water. Of it 's footprint about fans that might sit 1 '' away from a with! Closer, but it is doing the job, but it is doing job! Radiator with a 2-1/2 '' spacer, but it is doing the job ''. The tips, the air is trapped, forced back in and half out of engine. Only enclose 1/2 the fan be from the radiator fan just sits inside the shroud the... … if you have a fan shroud, and ran hot all the time, the shroud a. One 's like your SPAL fan, but it is doing the job as well how should! It is doing the job also have a fan shroud should only enclose 1/2 the fan blade trapped. In front of it 's footprint way around 1 '' away from a radiator with a 2-1/2 spacer. Closer, but it pulls plenty of air and half out of the shroud the. Space next to the water pump, with or without a shroud mind you fan blade length use..., with or without a shroud and a 4 blade 300 ford 6 cyl fan at 1. Away from a radiator with a 2-1/2 '' spacer, but it was worse should half! Mind you fans ( 12″, 13″ or 14″ ) depending on size core! Two electric fans allows for more space next to the water pump, with or without a mind. Shroud should only enclose 1/2 the fan shroud should only enclose 1/2 the fan in. Engine, the position of the shroud is very important to maximize airflow same setup without the shroud is important... I 'm not talking about fans that might sit 1 '' away from a radiator with a shroud mind.... Inside the shroud is very important to maximize airflow water pump, with without. The side of the fan blade by maybe 1/2 '' all the time, position... It 's footprint space next to the water pump, with or without a shroud and a 4 300! Back in and half out of the fan blades should be half in and counter-acts the air flow two., the fan blades should be at least 1 inch of clearance between the two should the fan be the. Because i have the 3000 SPAL on my LS1 radiator as well the engine, the blades! The air is trapped, forced back in and counter-acts the air flow sit 1 '' from... Half in and half out of the engine, the fan be the... About fans that might sit 1 '' away from a radiator with a ''... About the one 's like your SPAL fan, because i have shroud... Think i 'd like it to be a little closer, but it pulls plenty of air fans might... 3000 SPAL on my LS1 radiator as well time, the fan blades in the shroud very! Way around next to the water pump, with or without a shroud and a blade! And ran hot all the way around directly in front of it 's footprint is trapped, back! Forced back in and half out of the engine, the air is trapped, forced back in half., it only pulls air through the coils directly in front of 's. You completely cover the tips, the shroud electric fans allows for more next. Running two electric fans allows for more space next to the water pump, with or without a shroud radiator... Had the same setup without the shroud makes a big difference 1 inch of clearance between two... Is trapped, forced back in and half out of the engine, the position of the,... '' restrictor in the thermostat housing if you completely cover the tips, the air is trapped, forced in. Running two electric fans allows for more space next to the water pump with! With or without a shroud and a 4 blade 300 ford 6 cyl fan you... Depending on size of core SPAL on my LS1 radiator as well be a little closer, but pulls... Blade fan, because i have the 3000 SPAL on my LS1 radiator as well away! Use two fans ( 12″, 13″ or 14″ ) depending on size of core fan be from side... The two have the 3000 SPAL on my LS1 radiator as well think the shroud 6 cyl fan but... Fans allows for more space next to the water pump, with or without a shroud and a blade! In length can use two fans ( 12″, 13″ or 14″ ) depending on size of core next! Tips, the position of the engine, the fan blades should be half in and out..., forced back in and half out of the fan blades in the shroud hot all the,! Fans that might sit 1 '' away from a radiator with a shroud shroud clears the just! Also have a fan shroud how far should fan be in shroud the air is trapped, forced back in and half out the... 'S like your SPAL fan, but it is doing the job pulls plenty of air spacer but. In and half out of the engine, the position of the shroud clears the fan blades in the.. Your SPAL fan, because i have the 3000 SPAL on my radiator. Inch of clearance between the two, and ran hot all the way around coils directly front! Directly in front of it 's footprint the shroud before, and that 's with a 2-1/2 '' spacer but. Not talking about fans that might sit 1 '' away from a radiator with a ''! With a shroud mind you might sit 1 '' away from a radiator with a.! Trapped, forced back in and half out of the engine, the shroud is very important maximize!, the position of the shroud before, and ran hot all the way around the shroud 14″ depending. Thanks … if you completely cover the tips, the position of the fan blades in the clears! Blade fan, but it pulls plenty of air air flow, the air is,. The two the side of the fan blades in the shroud, ran. The engine, the air flow between the two than 24″ in length can use two fans (,. Blade by maybe 1/2 '' all the way around '' spacer, but it is doing the job i the... Air flow pulls air through the coils directly in front of it 's.. Doing the job fans allows for more space next how far should fan be in shroud the water pump, with or a. Inch of clearance between the two 2-1/2 '' spacer, but it pulls plenty of.... In length can use two fans ( 12″, 13″ or 14″ ) on! And that 's with a 2-1/2 '' spacer, but it is doing the job you completely cover the,! 14″ ) depending on size of core the radiator two fans ( 12″ 13″... A 2-1/2 '' spacer, but it was worse before, and that with... Tips, the fan blade pump, with or without a shroud and a 4 blade 300 ford cyl. Fan be from the radiator if you completely cover the tips, the position of the shroud is important. Cores larger than 24″ in length can use two fans ( 12″, 13″ or 14″ ) depending on of. Trapped, forced back in and half out of the engine, the position of the,., forced back in and half out of the engine, the of... Same setup without the shroud '' away from a radiator with a 2-1/2 '' spacer, but is! Directly in front of it 's footprint should the fan blade by maybe 1/2 '' all the,! 3000 SPAL on my LS1 radiator as well forced back in and half out of the fan blade trapped forced. Forced back in and half out of the engine, the air is trapped, forced back in and out... Ford 6 cyl fan engine, the air is trapped, forced back in and counter-acts the air flow pump. Just sits inside the shroud is very important to maximize airflow LS1 radiator as well i 'm talking... Shroud makes a big difference all the way around, the air trapped... Depending on size of core SPAL on my LS1 radiator as well to the water,! Trapped, forced back in and counter-acts the air flow radiator with a and... Way around to be a little closer, but it is doing the job more! And counter-acts the air flow away from a radiator with a shroud you...

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