johnnymv1
Forum Newbie
Posts: 66
Age: 28
Loc: Phoenix, AZ
Reg: 04-15-11
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05-23-12 06:39 AM - Post#2228906
Hey fellas, so I spent crazy dough getting stuff chromed out in the engine bay and one of the nicest thing in my opinion was the rad fan. But a couple weeks ago while I was shifting my engine shifted a lil forward and it hit the radiator and at 450 to recore the darn thing it can get pricey so I decided to ditch the mechanical and go electric, the one I put on was too small and over heats when idling for a while. So my question is what size will work and is it better to have it pushing or pulling. I'll try to post sum pics up soon. Thanks guys.
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 Bob_Hayden
"12th Year" Gold Supporting Member
Posts: 5742
Age: 66
Loc: Indianapolis, In. USA
Reg: 07-17-01
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 05-23-12 07:45 AM - Post#2228922
In response to johnnymv1
Not remembering what set up you have, I have a 350 with a Superior aluminum radiator. I am useing a 16 inch puller. I used a puller because I didn't want anything in front to block off the radiatopr any more than the AC unit does. I think my fan is 1600 RPM's.
| Bob Hayden's 54 Chevy, 350 Engine with TH400 Tranny and 94 4X4 Blazer Rear End with 3:23 gears.(FINISHED PICS) </a> My 54 Albums |
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Bob_Hayden
"12th Year" Gold Supporting Member
Posts: 5742
Age: 66
Loc: Indianapolis, In. USA
Reg: 07-17-01
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05-23-12 07:47 AM - Post#2228925
In response to Bob_Hayden
You can see mine in my picture Albums.
| Bob Hayden's 54 Chevy, 350 Engine with TH400 Tranny and 94 4X4 Blazer Rear End with 3:23 gears.(FINISHED PICS) </a> My 54 Albums |
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johnnymv1
Forum Newbie
Posts: 66
Age: 28
Loc: Phoenix, AZ
Reg: 04-15-11
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05-23-12 08:04 AM - Post#2228937
In response to Bob_Hayden
On yeah it's the original setup it has a 235 and has the original radiator just been recored.
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cederholm
Frequent Contributor
Posts: 1310
Age: 46
Loc: Brooklyn NY
Reg: 09-28-10
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05-23-12 08:30 AM - Post#2228943
In response to johnnymv1
What are your plans for that chrome fan?? 
A stock motor/fan/radiator should NOT be shifting around causing damage. I would take a serious look at your motor mounts/trans mounts and radiator support. Find out why things are moving and fix it. 
~ Carl
Carl E. Cederholm
Brooklyn NYC
'53 Deluxe MoreDoor, triPPPle Rochesters, Fenton exhaust, dual Porter mufflers, 3" drop, 12v, and Offenhauser shinny bits! |
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 53belair
"2nd Year" Silver Supporting Member
Posts: 827
Age: 57
Loc: Ellerslie, Georgia
Reg: 03-25-07
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05-23-12 06:23 PM - Post#2229110
In response to johnnymv1
I know a lot of folks that have used the stock radiator to cool a mild small block V8. That leads me to think that it takes about the same airflow to cool the stock six. Most 'sperts seem to recommend 2,000 rpm and up. I used a flex a lite black magic with about 2,200 rpm and around 3,000 CFM of air flow. The link below gives some info about fans from flex a lite that might help even if you use somebody else's fan. A shroud makes a ton of difference.
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Jim McCall McShop
"4th Year" Platinum Supporting Member
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05-23-12 06:56 PM - Post#2229116
In response to johnnymv1
Here are a few basics for using electric fans to cool your engine.
Pusher fans are about 20% less effective that puller fans.
Without a shroud the only portion of your radiator that is cooling is the surface area of the fan.
Most manufacturers other than Spal over rate their CFM's
The average small block needs 2700 CFM with a shroud, average big block needs 3500 CFM with a shroud, for high HP add more CFM's
Finally can't over stress the need for a shroud, as it spreads the airflow over the entire radiator, using the entire surface rather than the area of the fan.
I have many cars, most with air-conditioning and all will cool with no problem on a hot day in traffic running the air.
Jim
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