Iso 5-7 blade mechanical fan blade - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BCOWANWHEELS · 09-21-2015, 11:39 PM

I need a 5 to 7 blade fan for my 250 i-6 that is mechanical. Anybody know where to get one of these critters. I,ve looked everywhere around here at home.
Thanks
bob in tn.

lowrollin70gmc · 09-22-2015, 12:02 AM

I've ran a 6 blade fan off an 80s small block (I think, it was a loose fan after my stock one shot off a blade 600 miles from home)

I've switched to electric fans on my 63 Nova, if you can't find one locally you can have mine for the cost of shipping.

BCOWANWHEELS · 09-22-2015, 12:12 AM

Is it a mechanical fan or does it have a clutch ? I dont care for the clutch type. Thanks

lowrollin70gmc · 09-22-2015, 12:46 AM

Mechanical, I only had 1" of space between the radiator and water pump. Reduced to 5/8" with aluminum radiator plus it would have hit my new A/C compressor so I had to switch to electrics. Under the hood is really tight in the little Nova with a hopped up 250.

Kept the six cool for the couple years I ran it.

**Stocker** · 09-22-2015, 12:46 AM

Quote:

Originally Posted by BCOWANWHEELS

Is it a mechanical fan or does it have a clutch ? I dont care for the clutch type. Thanks

No clue what turned you against them, but clutch fans are the only thing I'll consider using, unless it's a vehicle with electric fans already on it. Not that there's anything wrong with a good electric fan conversion.... just that I would never use a fixed-blade fan (and certainly not a flex fan).

MARKDTN · 09-22-2015, 07:35 AM

A 6-blade rigid fan is a HP robber. Look at this dyno test from Car Craft.

http://www.network54.com/Forum/21565...+Fan+Dyno+Test

A clutch fan was closest to electric fan or no fan at all.

09-21-2015, 11:39 PM	#1
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Iso 5-7 blade mechanical fan blade I need a 5 to 7 blade fan for my 250 i-6 that is mechanical. Anybody know where to get one of these critters. I,ve looked everywhere around here at home. Thanks bob in tn. __________________ I BELIEVE IN JOHN 3:16

09-22-2015, 12:02 AM	#2
lowrollin70gmc Too many projects Join Date: Mar 2004 Location: Fargo, ND land of the flat hills Posts: 1,147	Re: Iso 5-7 blade mechanical fan blade I've ran a 6 blade fan off an 80s small block (I think, it was a loose fan after my stock one shot off a blade 600 miles from home) I've switched to electric fans on my 63 Nova, if you can't find one locally you can have mine for the cost of shipping. __________________ Andrew 84 GMC C1500 SWB 6.2 Diesel/700R4/3.42 "Grandpa's odd duck" 70 GMC C1500 LWB My first truck: shaved, bagged, and more: the lowrollin70gmc 68 K20 Suburban 12V Cummins/NV5600/NP205/D60/11.5AAM 3.73s "Dakota Cadillac" 63 Chevy II Nova Coupe 250 I6/T56/4.56s "Economy car" 53 Willys Wagon 350/NV4500/BW4401/HP D44/9inch “Winter Wagon” 30 Model A 16 Focus ST

09-22-2015, 12:12 AM	#3
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: Iso 5-7 blade mechanical fan blade Is it a mechanical fan or does it have a clutch ? I dont care for the clutch type. Thanks __________________ I BELIEVE IN JOHN 3:16

09-22-2015, 12:46 AM	#4
lowrollin70gmc Too many projects Join Date: Mar 2004 Location: Fargo, ND land of the flat hills Posts: 1,147	Re: Iso 5-7 blade mechanical fan blade Mechanical, I only had 1" of space between the radiator and water pump. Reduced to 5/8" with aluminum radiator plus it would have hit my new A/C compressor so I had to switch to electrics. Under the hood is really tight in the little Nova with a hopped up 250. Kept the six cool for the couple years I ran it. __________________ Andrew 84 GMC C1500 SWB 6.2 Diesel/700R4/3.42 "Grandpa's odd duck" 70 GMC C1500 LWB My first truck: shaved, bagged, and more: the lowrollin70gmc 68 K20 Suburban 12V Cummins/NV5600/NP205/D60/11.5AAM 3.73s "Dakota Cadillac" 63 Chevy II Nova Coupe 250 I6/T56/4.56s "Economy car" 53 Willys Wagon 350/NV4500/BW4401/HP D44/9inch “Winter Wagon” 30 Model A 16 Focus ST

09-22-2015, 07:35 AM	#6
MARKDTN Registered User Join Date: Jan 2011 Location: Chattanooga, TN Posts: 2,167	Re: Iso 5-7 blade mechanical fan blade A 6-blade rigid fan is a HP robber. Look at this dyno test from Car Craft. http://www.network54.com/Forum/21565...+Fan+Dyno+Test A clutch fan was closest to electric fan or no fan at all. __________________ '83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project



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