Does anyone else like the sound of a frozen radiator fan? - Nissan : Datsun ZCar forum :Nissan Z Forum: 240Z to 370Z
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post #1 of 15 (permalink) Old 08-23-2019, 03:09 AM Thread Starter
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Does anyone else like the sound of a frozen radiator fan?

My first Z (indeed, my first car) was a '79 280ZX. The radiator fan clutch on that car was locked up, so the fan always turned at engine RPM. But I liked it, as it made the engine sound a lot more hyper and race-worthy than it really was. I blame the old Need for Speed games....those who played the original version might recall the Ferrari Testarossa had a rather high-pitched engine sound. My old Z sounded just like it!


Alright, onto the tech part of this post...my '83 had a normally functioning fan, but even when it was spinning pretty good, it didn't make much noise. Is it normal for the radiator fan to "sing" at high RPM? I've always wondered if it was perhaps the wrong fan.


I'm hunting for another Z now, probably a 280ZX. I've got half a mind to lock the radiator fan so the engine will sing like my '79.


Matt

'79 and '82 280ZXs: gone but not forgotten.
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post #2 of 15 (permalink) Old 08-23-2019, 02:12 PM
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Originally Posted by mattb View Post
My first Z (indeed, my first car) was a '79 280ZX. The radiator fan clutch on that car was locked up, so the fan always turned at engine RPM. But I liked it, as it made the engine sound a lot more hyper and race-worthy than it really was. I blame the old Need for Speed games....those who played the original version might recall the Ferrari Testarossa had a rather high-pitched engine sound. My old Z sounded just like it!


Alright, onto the tech part of this post...my '83 had a normally functioning fan, but even when it was spinning pretty good, it didn't make much noise. Is it normal for the radiator fan to "sing" at high RPM? I've always wondered if it was perhaps the wrong fan.


I'm hunting for another Z now, probably a 280ZX. I've got half a mind to lock the radiator fan so the engine will sing like my '79.


Matt
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1978 280z - stock L28 engine - Dallas, TX
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post #3 of 15 (permalink) Old 08-23-2019, 02:36 PM
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Originally Posted by mattb View Post
My first Z (indeed, my first car) was a '79 280ZX. The radiator fan clutch on that car was locked up, so the fan always turned at engine RPM. But I liked it, as it made the engine sound a lot more hyper and race-worthy than it really was. I blame the old Need for Speed games....those who played the original version might recall the Ferrari Testarossa had a rather high-pitched engine sound. My old Z sounded just like it!


Alright, onto the tech part of this post...my '83 had a normally functioning fan, but even when it was spinning pretty good, it didn't make much noise. Is it normal for the radiator fan to "sing" at high RPM? I've always wondered if it was perhaps the wrong fan.


I'm hunting for another Z now, probably a 280ZX. I've got half a mind to lock the radiator fan so the engine will sing like my '79.


Matt
i remember NFS3 for the PC. i couldn't get enough of that game. so much fun
as far as the fan, the noise shouldn't matter. what should matter is that the thing is functioning and keeping the radiator cool. the fan clutch should have a part number on it if its original

i don't recall the fan on my 80 having any high pitched sound. not on my 83 either.

Bon

All the Gods, all the Heavens, all the Hells, are within you. - Joseph Campbell -

Pooja II ~ 1984 300ZXT 50th AE ~ 2018 - 2019
Pooja ~ 1987 300ZX 2+2 NA2T ~ 2012 - 2018
Suzanna ~ 1983 280ZX Coupe ~ 2010 - 2019
Alana ~ 1976 280z Coupe NA2T ~ 2008 - 2019
Dianna ~ 1980 280ZX Slick Top ~ 2001 - 2007
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post #4 of 15 (permalink) Old 08-24-2019, 12:16 AM
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Mr.b:

Your old fan screamed at high rpm because it didn't like doing that. It's why they put a centrifugal clutch on it.

Maybe you could just run an mp3 of the "Grand Prix" soundtrack instead.



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post #5 of 15 (permalink) Old 08-24-2019, 07:43 PM
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i remember NFS3 for the PC. i couldn't get enough of that game. so much fun
as far as the fan, the noise shouldn't matter. what should matter is that the thing is functioning and keeping the radiator cool. the fan clutch should have a part number on it if its original

i don't recall the fan on my 80 having any high pitched sound. not on my 83 either.

Bon
Funny, I too liked the sound when my fan clutch froze. Sounded like a blower! It was more of a air flow humming noise verses a screeching. I kept it that way for about a year until I recently replaced the AC tensioner pulley bearing that started screeching. Don't know how long the frozen fan clutch would have lasted before causing some real damage.

kz79
79 280zx
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post #6 of 15 (permalink) Old 08-25-2019, 07:01 PM
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I hear the howl of the fan all the time. But remember, a locked up clutch is stealing power from the engine with every turn.

I've thought more than once about ditching the fan and installing an electric fan. Less HP loss and quieter.
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post #7 of 15 (permalink) Old 08-26-2019, 06:33 AM
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I hear the howl of the fan all the time. But remember, a locked up clutch is stealing power from the engine with every turn.

I've thought more than once about ditching the fan and installing an electric fan. Less HP loss and quieter.
i never really notice the noise of fan on my 280zx. but on my Z31 the fan is real loud. i guess because of that big giant duct maybe.
i had the maxima electric fans on my former Z31 and when they kicked on you could definately hear them, but the sound didn't go up and down during accelleration like the stock fans do.
personally i think the 280zx clutch fan does sufficient cooling on a stock car. i agree though, sometimes its good to go to electric fans. if you do it, make sure you upgrade your alternator so you got a few more amps to carry that extra load.

Bon

All the Gods, all the Heavens, all the Hells, are within you. - Joseph Campbell -

Pooja II ~ 1984 300ZXT 50th AE ~ 2018 - 2019
Pooja ~ 1987 300ZX 2+2 NA2T ~ 2012 - 2018
Suzanna ~ 1983 280ZX Coupe ~ 2010 - 2019
Alana ~ 1976 280z Coupe NA2T ~ 2008 - 2019
Dianna ~ 1980 280ZX Slick Top ~ 2001 - 2007
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post #8 of 15 (permalink) Old 08-26-2019, 12:14 PM
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I agree the stock ZX fan is perfectly adequate for the vehicle if the shroud is in place and the radiator is working well. For the last year or so my AC booster fan hasn't been working, but I can drive with the AC on during hot (90+) days and it's only if I get stuck in stop and go that the engine starts to heat up past what's desirable. Then I kick the AC off. I'm still looking for the problem...
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post #9 of 15 (permalink) Old 08-27-2019, 01:34 AM Thread Starter
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i remember NFS3 for the PC. i couldn't get enough of that game. so much fun
as far as the fan, the noise shouldn't matter. what should matter is that the thing is functioning and keeping the radiator cool. the fan clutch should have a part number on it if its original

i don't recall the fan on my 80 having any high pitched sound. not on my 83 either.

Bon

Yep, I had NFS "SE", NFS3, and NFS4. I still think NFS4 has the best game intro I've ever seen. Still makes me want to jump in a car and go fast.


I suppose for my next Z I'll do the "mature" thing and have a properly functioning fan, and a good exhaust system if I want pretty sounds.


Matt

'79 and '82 280ZXs: gone but not forgotten.
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post #10 of 15 (permalink) Old 08-27-2019, 03:09 AM
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Originally Posted by mattb View Post
Yep, I had NFS "SE", NFS3, and NFS4. I still think NFS4 has the best game intro I've ever seen. Still makes me want to jump in a car and go fast.


I suppose for my next Z I'll do the "mature" thing and have a properly functioning fan, and a good exhaust system if I want pretty sounds.


Matt
best thing you can do is get a new clutch fan, make sure you got a complete shroud, and a 2.5" cat-back exhaust from certified muffler. awesome sound and functional for the car.

cheers,

Bon

All the Gods, all the Heavens, all the Hells, are within you. - Joseph Campbell -

Pooja II ~ 1984 300ZXT 50th AE ~ 2018 - 2019
Pooja ~ 1987 300ZX 2+2 NA2T ~ 2012 - 2018
Suzanna ~ 1983 280ZX Coupe ~ 2010 - 2019
Alana ~ 1976 280z Coupe NA2T ~ 2008 - 2019
Dianna ~ 1980 280ZX Slick Top ~ 2001 - 2007
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