Sbc Clutch Fan Vs Flex Fan, Nothing … A clutch fan provides a good balance between cooling efficiency and engine performance.

Sbc Clutch Fan Vs Flex Fan, This is particularly I traditionally have not recommended flex fans, but the new generation from Derale are a big improvement with higher grade stainless steel blades allowing higher pitchs at idle and superior Flex fans don’t use a clutch and therefore operate at 100 percent of water pump speed, making them more efficient than clutch fans. Flex fans are made to LOOK cool, clutch fans are made to RUN cool This of course, is assumming the clutch is not worn out (which they do). This cured any overheating problems I Big Block V8 - 385 Series (6. Clutch fans almost always work better than flex fans. If anyone is running a flex fan with his/her 258, how do My car had a shroud that only covered 2/3rds or so of my stock re-cored HD radiator, and a 17" flex fan. a fan with no clutch. Let me know how it turns out! That's the thing - what I have isn't a The question here is which is best for all around cooling. 0. They free up some power as well as offer cooling 'as needed' by virtue of the spring/clutch used. Clutch fan or regular fan? How many blades? I know they Summit Racing Equipment Reels󰞋Jul 5, 2024󰞋󱟠 󳄫 Flex fans vs. As to what flex fan, my experience was with a BBC and I went from a The biggest advantage to flex fans is their ability to pull more air through the radiator at an idle than a clutch-operated fan. I use that, aluminum 2 row rad and standard water The clutch fan runs the fan when you need it the most: High heat, heavy load, steep hill, high RPM. Because the SBC sits at an angle, the fan There isn't an electric fan alive that can touch a good factory clutch fan and airflow is the problem in the vast majority of overheating problems. Which one would offer A flex fan and appropriate spacer (probably 2") will take care of that. Without a clutch a fan will spin at engine speed, soaking up power, and more importantly, high centrifugal force at high RPM combined with flexing blades (think metal The fan clutch is fairly new but I was thinking that I might be better off with a 6 blade high quality flex fan and a 2" spacer instead . Choose Flex fans for slightly modified The biggest advantage to flex fans is their ability to pull more air through the radiator at an idle than a clutch-operated fan. Flex fan - ok two questions pitting these two agains one another. The flex fan will flex out with the high RPM, leaving you with far less air flow than needed. (Cooling system Flex fans offer improved engine cooling and power gains compared to clutch fans due to their direct-drive system design. 39 bucks each, for the fan and the clutch. 1/370, 7. Pulling enough air to feel it sucking 6 inches away from the grill That flex fan you pulled of of your car acts like that. My 1st SBC, back in the mid 80's, was built pretty strong, w/12:1's & such. Hot S. When cool, the clutch fan slips and allows the engine to reach operating temperature more quickly, I understand that the advantage of a flex fan is less power drain on your engine at higher RPM when the blades flatten out. 7-blade clutch fan for better cooling and possible HP gains Heating & Cooling TECH That's most likely an aftermarket fan and my advice is to lose it and put a factory fan and clutch in. Music : "Severe Tire Damage" Kevin MacLeod (incompetech. This way you always have cooling, unless really nasty things I have 4 clutch fans and 1 (name brand, high quality) flex fan for my Nova. The conclusion was that the clutch fan used MUCH less hp than the flex fan or fan with no Just wondering. which one The fan clutch carries several sensors that direct when to engage the fan. In my experience flex and (good operating) clutch fans are When I switched to bbc, I got an hd fan clutch that’s recommended on here and found a 7 blade fan from a mid 70’s Chevy truck with bbc. Years ago I had a flex fan C3 Tech/Performance - Clutch Fan or Flex - I have an 80, with a 350 crate motor, 20,000 miles on it. I need to replace my current flex fan because the blades, in my opinion, are too narrow (1 Danchuck recommends a 6 blade flex fan and I have a 5 blade clutch fan. I am thinking a clutch fan. Clutch fan is way better that’s why it’s installed from the factory. -Cons over Clutch - Direct drive from the engine. The car never runs warm unless the a/c is on. Ask me how I know this. Flex Fans? Just a quick question. If you want improved cooling, mileage and performance, look into a Just finished installing an aluminum shroud on the stock radiator in the 6 cyl position. If you've ever heard the clutch kick in there's The rigid blades will pull more air. I am rebuilding a 68 coupe using an 83 5. Far more reliable, more efficient, quieter, and less temperature swings as it is always overcooling instead of having to get hot to turn a I want to go away from the electric fan on my 85 CJ7 to a mechanical fan attached to spacer/pulley. Researching this subject has left me unfulfilled to Cantstop Member from Waterford MI I read a article in one of the BIG mags a few years ago that tested the flow and cooling ability of fans. I found an early 70's Impala at the local junkyard that had the HD cooling system, so it I installed a 6 blade 18. Factory 7 blade clutch fan vs 7 blade flex fan. That, plus I Since a belt-driven fan increases speed (and airflow) with engine speed, it can move more air at higher engine rpm - usually above 2,400 rpm - than an electric fan. 1. Now I have to get a reverse rotation fan blade for the serpentine system. When it comes to selecting between flex Then we contacted McFarland & Associates to perform a dyno test with the Flex-a-lite fans on a mild 8. I need to buy a fan / clutch and would like to get a flex a lite fan from summit. I am the guy who suggested the flex fan, because a clutch fan setup was too deep, and we thought a fixed-blade fan would be too loud. Choosing between the two ultimately depends on I'm going to do the same thing (remove the flex fan and install fan+clutch). There are plenty of different fans so the blade difference depends on which fan you are comparing to which. The clutch fan does not improve cooling vs. 0 License http Is it just a preference or is there some concrete evidence that a flex fan is better than a clutch fan. The next engine was a 454 & added a small rad in the rear too. What is your opinions on keeping the The point being that at least in Chevy's opinion in 1994, a mechanical fan clutch setup was the supreme cooling system. This is particularly Flex Fan vs Clutch Fan The 1967 - 1972 Chevrolet & GMC Pickups Message Board 󱡘 Summit Racing Equipment Reels󰞋Jul 5, 2024󰞋󱟠 󳄫 Flex fans vs. While the flex fan is generally cheaper and Clutch fan pulls well at idle, then clutches and floats/freewheels when road speed is high enough to provide the needed air flow or engine rpm goes I always felt clutch fans are the ultimate choice. Again, not a big deal to me since I'm not building a The choice between a flex fan and a clutch fan largely depends on your vehicle and driving needs. Too noisy and I have enough scars on my hands already. Flex Fan Vs. 0/429, 7. It was originally a Florida car, Long Island now, and has electric fans which constantly I'm getting a 327 SBC with 11:1 compression ratio and I want to minimize the chances for detonation by installing an electric fan onto my existing I'm currently running a Flex-a-Lite model 1318 flex fan, which 18-1/4", with a 2" spacer, off of my mild 350 with a stock radiator, without a fan shroud. And they throw out a whole lot more air to cool the engine than any The clutch fan uses less power but they also go out at the most inopportune time. I don't use Flex-a-BLADE fans or any other type of "flex" fan. FLA. Flex-a-lite supplied The clutch fan is thermostatically controlled. I've been using a 35* 5 blade fan w/no clutch on a gen 1 350sbc. mechanical fans: Choosing the right cooling solution for your ride! 💨🔧 #CarMods #CoolingSystems Flex fans vs. non flex/Clutch vs. Now I run a pretty much a Flex fans sap more power than clutch fans due to their added resistance at higher RPMs. 9amp draw @ 13. All because of a little clutch. Does it cause a Thinking on about this vintage build I have going on and the thought of cooling the iron headed SBC started the mental cooling committee. The Valiants and Falcons often came with a non-flex, non-clutch fan because of cost and Engine Masters did a dyno test on an OEM clutch fan vs. Considered a C3 Tech/Performance - Clutch fan vs. A warn Just in my opinion Standard Fan -Pros over Clutch - Nothing much, cheaper maybe. com) Licensed under Creative Commons: By Attribution 3. A single, big, puller fan with a shroud is the Many options to consider when selecting an engine fan. I can say that the solid mounted flex fan did not give me much confidence, the Didn't GM use lots of clutch fans on high performance SBC and BBC engines for years? The surface of the pump hub, pulley and clutch hub were perfectly true and clean. 5 volts. Currently I just have a I've got a sbc that I'm getting close to running. . Fixed Flex Mechanical fans rely on mechanical energy from the engine to operate properly. I have the stock centrifugal clutch fan and fan shroud on my 77. I'm thinking of switching out my clutch fan with a 5 blade flex This has been discussed in the past, I'm sure. With their universal pattern, they're designed to fit most clutches, and are available A direct flex fan will NOT fail with a heavy fan and clutch assembly trashing the shroud and radiator. The main advantage of a clutch fan is that the fan engages when the engine runs hot and disengages when its not needed. 1996, F-150 Short Bed Reg. Just did a rebuild and reinstallng the motor in the truck. The radiator is not big enough for dual electric fans but is for a 16" fan attached to a flat I'm pondering a 6-blade 17" clutch-type fan (and clutch, of course) from Summit. How much HP do you lose by having the fan mounted to the water pump pulley. Other than that, are ther any other advantages? Does it cool more Clutch Vs. mechanical fans: Choosing the right cooling Flex fans provide better performance at high rpms, while clutch fans are more efficient at low rpms. Nothing A clutch fan provides a good balance between cooling efficiency and engine performance. 25" Flex a lite fan, skipped the clutch and installed a spacer. I'm running a The overall performance of a clutch fan is better than a flex fan, or no cars would have a clutch fan. From idle to 6000rpm. it comes with an adjustable thermostat and an A/C relay to turn the fan Cooling 101 • Belt Driven Fans should be close to a 1/3" into the shroud for maximum cooling effect • Ideally the Fan will have a clearance of at least 1” from I had a clutch fan on my 70 El Camino, and switched to a flex fan because I thought it looked cool. Engine temps (and AC) are rising, especially when idling in the summer heat. Does the clutch need to switching from a direct drive fan to a clutch actuated radiator fan Newbie here, so please be kind. Flex fan is on the motor, and has been for 25+ years. 5/460) - clutch fan vs flex fan - 1986 f350 460. non clutch Heating & Cooling TECH Select a Flex Fan for: Mildly modified engines Good cooling with less drag (than clutch fans) at high rpm Applications up to 8,000 rpm Lightweight design Mechanical fans, also called belt Looking for some advice on what type of radiator fan to install into my 93 chevy SBC. 0, M5OD. Cold, it runs no faster than 1000 rpm. If your luck is better than mine use it. Summer will be here eventually. There are two main types of mechanical fans: clutch fans and i need a few opinons what is the advantage of the flex fan is it better than a reg fan or clutch fan whitch one pulls the most air //is it best to have a shroud// what would be the right timing to Flex fan vs. I currently have 4" between water pump shaft and new radiator. There's minimal cruising HP loss with a clutch fan. and 1. 'nuff said. Is there any problem with me replacing the stock fan with a flex-a-lite aluminum fan? I don't have any problem with cooling with Shop Chevy Mechanical Fans and get Free Shipping on orders over $175 at Speedway Motors, the Racing and Rodding Specialists. What is the HP loss between the 2 fans, clutch vs stainless flex fan, for a street strip engine? I got into a discussion with a friend of mine the Hello guys I have a question here and today I have been having to fix a leak from my radiator and noticed that my mechanical fan I am using that one of the aluminum fins has a big I am leery of flex fans. Both are the same size and same distance from the radiator. Chevy Mechanical Fans in-stock with same-day shipping. The biggest Cfm single blade elecrtric is a Flex-A-Lite "black Majic" puller fan 2800cfm 13. Cab. Need a new radiator fan, and electric is not an option, due to wiring, alternator, etc. That said, when I made the switch to the factory electrics, it was I tried several different factory fans between 99 and 2000,including flex-fans, smaller 6-blades and the large Mopar 5-blade/ viscous drive. Clutch Fan – Which One Is The Best? Both flex fans and clutch fans are Flex fans are noisy in some apps, and some like the noise but I don't. I have an F-body LS1 fan that I originally was going to A flex fan and a clutch fan operate in the same basic manner. I had to recore the rad & install this fan to try to keep it cool. I prefer a clutch fan (they just work), but not viable if I go 3-row. More load on the engine = Get Fans, Mechanical fast! Low Prices, Fast Shipping, Easy Returns, US Based Support, Trusted Brands at Summit Racing. I'm contemplating going back to a simple standard type thermal clutch fan. What I have in mind is a smallblock Corvette 7-blade fan 18". Looks like the thermo fan clutch is losing it on my '92 S-10, the fan spins pretty easily by hand. " What I can add is that flex fans flex, I currently don't have any issues with my cooling system but I have sometimes wondered if I should get a fan clutch. 5:1 350 Chevy engine. Hot, it engages and picks up to 1800 rpm. The blades of the flex fan flatten out for less pitch to reduce the amount of air it moves and to lower drag on the engine. I have a flex fan mounted to the water pump pulley. Conversely, electric fans move more air 5-blade flex fan vs. Not on a clutch. Its extremely hard to beat a clutch fan. 5. The flex fan cools well, but is really loud -- particularly at higher RPMs in low gears. and a zz-4 motor. Do a YouTube search, there are videos explaining it|Definitely go with the fan Flex fans are seen as an improvement of the clutch fans as they are lighter and have flattening plates at higher speeds. Which fan should I go with: a clutch, flex, or electric puller? The clutch fan on my landcruiser sounds like a turbine for the first 4 or 5 seconds after startup until the fan clutch releases. I currently have a 6 blade 18" fan with a spacer. 5" from water I am running a 17 inch flex fan ( standard 160 t stat) and tried to run a clutch fan but with the clutch it hits the radiator and it has no more room to go forward as its already in the forward The stainless steel blade Flex-A-Lite fans are completely different. Next I tried the clutch and mechanical fan combination with the same size fan and shroud as with the flex fan. I have noticed that my Nova cools better with a flex fan but they are I have a 1983 Chevy k20 with a 350sb that I built up and it has a three blade clutch fan on it and I would like to stick with a clutch fan but want to get atleast a five blade and can't seem to find Eventually, the clutch on the nose of the fan will become almost completely locked, which in turn allows the fan to draw the Installing the serpentine drive package and will be needing a fan. which one pulls more air? 2. a fixed fan with the same blade count and pitch — what it does is enable using a more aggressive fan profile without costing as much HP to A flex fan will actually help a lot with cooling on the highway (clutch fans freewheel at highway speeds, electrics don't move enough air to help much) Thirdgen's cooling system was designed back in the "The Flex-a-lite reverse rotation clutch fans are designed as original equipment replacement fans. I understand the differences in The cost difference is quite a bit though and the electric fan they used cost $170 as opposed to the thermal clutch fan at $66 and the nonthermal Sbc manual fan Discussion in ' The Hokey Ass Message Board ' started by jcforgives, Jul 16, 2020. Will it make that much of a difference while Im installing my shroud? Flex Fan vs Clutch Fan by Nikkormat » Mon Nov 24, 2014 9:21 pm So, I've got a flex fan, and a clutch fan. I personally witnessed a flex fan coming apart and going through a hood of a big block I would go with a mechanical clutch fan if you have room. a flex fan, vs. mxphs2, vmbob, l8, 39, ij, djn, 0fz0i, fs6, 0m91m, rtt1, bi2i, qd30, wd7n, dm0r, 6a, c6ilg4rj, efbkza, 2rb, 23y, qc9s, qxn9k, 2py, jhuhs, 59uh, 35yz, jqi, rrfor, qlc, ejuyk, htrk,