BB Fan Measurements - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1-PU70 · 09-05-2010, 11:31 AM

I am looking for the measurements of a BB fan. One from a 3/4 ton or 1 ton with AC maybe. Looking for the most cooling. I would need to know how many blades, the diameter and the blade pitch. A picture wouldn't hurt. I have a 6 blade that is about 18 3/4" with a pitch of about 2 1/4" and one that is 7 blades, about 18" and a 2 1/2 pitch (looks small in the BB fan shroud). Its going in my 70 with a 402 from a 72. It has AC, auto, PS.
Thanks for any help. Gary

**Stocker** · 09-05-2010, 11:56 AM

Quote:

Originally Posted by 1-PU70

I have..... one that is 7 blades, about 18" and a 2 1/2 pitch (looks small in the BB fan shroud).

That one matches the measurements of my OEM fan -- 350 w/ factory A/C.

1-PU70 · 09-07-2010, 09:26 AM

ttt

1-PU70 · 09-08-2010, 12:35 PM

Someone must have a BB fan they can take some measurements of.

GOPAPA · 09-08-2010, 01:51 PM

Quote:

Originally Posted by 1-PU70

Someone must have a BB fan they can take some measurements of.

Mine is 19 inches and 6 blades ,not sure of the pitch ,,but I would guess 2 1/4 pitch, it takes up almost the whole shroud ..I think it came out of a 3/4 ton truck .

1-PU70 · 09-09-2010, 10:32 AM

Thanks guys.

09-05-2010, 11:31 AM	#1
1-PU70 Registered User Join Date: Apr 2000 Location: Bradenton, FL Posts: 1,036	BB Fan Measurements I am looking for the measurements of a BB fan. One from a 3/4 ton or 1 ton with AC maybe. Looking for the most cooling. I would need to know how many blades, the diameter and the blade pitch. A picture wouldn't hurt. I have a 6 blade that is about 18 3/4" with a pitch of about 2 1/4" and one that is 7 blades, about 18" and a 2 1/2 pitch (looks small in the BB fan shroud). Its going in my 70 with a 402 from a 72. It has AC, auto, PS. Thanks for any help. Gary __________________ 1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters

09-07-2010, 09:26 AM	#3
1-PU70 Registered User Join Date: Apr 2000 Location: Bradenton, FL Posts: 1,036	Re: BB Fan Measurements ttt __________________ 1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters

09-08-2010, 12:35 PM	#4
1-PU70 Registered User Join Date: Apr 2000 Location: Bradenton, FL Posts: 1,036	Re: BB Fan Measurements Someone must have a BB fan they can take some measurements of. __________________ 1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters

09-09-2010, 10:32 AM	#6
1-PU70 Registered User Join Date: Apr 2000 Location: Bradenton, FL Posts: 1,036	Re: BB Fan Measurements Thanks guys. __________________ 1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters



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