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  #1 (permalink)  
Old 10-24-2020, 12:54 PM
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Default what radiator?

I have a 427 stroker motor that runs warm. It will overheat on hot days if pushed. I have a backdraft with a 16" fan the radiator has plastic tanks with aluminum coils. Car is a 2013 model and that is all I know . What would a good replacement radiator be also should I change out the fan? My motor I am told is close to 600 hp .
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  #2 (permalink)  
Old 10-24-2020, 03:55 PM
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Get BDR's expanded cooing radiator, have ad it for years on my Roush 427 and works great. That o Mishimoto makes one as well.
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  #3 (permalink)  
Old 10-24-2020, 05:21 PM
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Quote:
Originally Posted by hauss View Post
I have a 427 stroker motor that runs warm. It will overheat on hot days if pushed. I have a backdraft with a 16" fan the radiator has plastic tanks with aluminum coils. Car is a 2013 model and that is all I know . What would a good replacement radiator be also should I change out the fan? My motor I am told is close to 600 hp .
Questions:
  1. What do you mean by "runs warm"?
  2. "Overheat"?
  3. What temperatures are you seeing?
  4. In traffic or at speed?
  5. Does it boil over or dump coolant?
  6. Mechanical or electric gauge?
  7. Where is the sending unit or tube measuring the temperature?
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  #4 (permalink)  
Old 10-24-2020, 05:27 PM
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Get the Fluidyne (I had a leak and got the same as Shelby uses from Jegs).
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  #5 (permalink)  
Old 10-24-2020, 05:32 PM
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Quote:
Originally Posted by twobjshelbys View Post
Get the Fluidyne (I had a leak and got the same as Shelby uses from Jegs).
which one? will it bolt right up?
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  #6 (permalink)  
Old 10-24-2020, 05:37 PM
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Quote:
Originally Posted by cycleguy55 View Post
Questions:
  1. What do you mean by "runs warm"?
  2. "Overheat"?
  3. What temperatures are you seeing?
  4. In traffic or at speed?
  5. Does it boil over or dump coolant?
  6. Mechanical or electric gauge?
  7. Where is the sending unit or tube measuring the temperature?
mtn driving under 40 mph 80o f boil over pushing it cruising 230o f
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  #7 (permalink)  
Old 10-24-2020, 05:52 PM
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Quote:
Originally Posted by hauss View Post
which one? will it bolt right up?
Well, now that I think about it I'm not really sure, but it will fit in the Shelby CSX, Superformance and Kirkham. But I'm not sure about Backdraft.

The Fluidyne is an aluminum radiator and I considered it oversized for the SBF 427. This is the Fluidyne link

https://www.fluidyne.com/products/fh...cobra-radiator
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  #8 (permalink)  
Old 10-25-2020, 06:43 AM
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I am not radiator expert, but the leading theory on radiator cooling these days is the more rows you add beyond what you need actually causes the radiator to cool less because air cannot pass through the radiator efficiently. If you go on many sites, you will see 2 and 3 row aluminum radiators now rated at 800 and 1000 hp levels. The 2 row radiators are about 2.25" thick and the coolant passageways are 1" wide allowing more surface area for cooling.

Instead of a 5 row radiator, look at a double or triple pass radiator. A triple pass will drop the temperature close to 20 degrees with only 2 rows.
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  #9 (permalink)  
Old 10-25-2020, 08:58 AM
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You can use any BMW E36 (manual trans) radiator for a bolt-in.

The are several to choose from.
Mishimoto
https://www.mishimoto.com/bmw-e36-al...tor-92-99.html ($237 amazon)
Mishimoto X-Line
https://www.mishimoto.com/bmw-e30-e3...tor-92-99.html ($466 amazon)
Fluidyne
https://www.turnermotorsport.com/p-1...6-323325328m3/
C&R
https://www.crracing.com/product/bmw...88-99-radiator
Iconicparts
https://www.iconicparts.com/products...iator-and-fans

Fans
Mishimoto
https://www.mishimoto.com/race-line-...ow-fan-16.html
https://www.mishimoto.com/bmw-e36-pe....html#features
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  #10 (permalink)  
Old 10-25-2020, 09:37 AM
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When my car shipped from BackDraft after Speed Fanatix installed the engine, there was no thermostat installed. It overheated very easily. I think without the thermostat installed, the water was flowing through radiator too fast to have a chance to cool down. Did you check to see what thermostat you have and make sure its working correctly?

Cooling fan wired with correct polarity on the wiring?

What temp is Fan turning on at? Can you adjust what temp fan kicks on at?

The aluminum radiator you get from backdraft can be purchased with the mounting brackets installed as the aftermarket ones will mount a little different. I think the backdraft one also has option for the aluminum fan plenum and such….
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  #11 (permalink)  
Old 10-25-2020, 09:46 AM
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Backdraft has an upgraded aluminum radiator. I ordered a car 2 weeks ago and added that upgrade.
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Old 10-25-2020, 11:01 AM
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Afco racing radiators.
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  #13 (permalink)  
Old 10-25-2020, 11:02 AM
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As far as heat transfer goes, you want the hottest water hitting the coldest air first, for the greatest efficiency. More rows helps along with greater capacity. A weak fan due to interior motor windings breaking down could also be part of the problem. Old owner used to keep fans running at all times.Not sure what omhs should be on motor for fan . It is my belief more hp creating more heat is my problem Original builder spent money on bling not knowing he needed to spend it on a upgraded cooling system for the motor he chose.
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  #14 (permalink)  
Old 10-25-2020, 11:06 AM
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Thank spdbrake for the info very helpful. Also would like to thank others too this is how we learn.
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  #15 (permalink)  
Old 10-25-2020, 12:34 PM
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Fan is not a huge issue at 40 MPH and above.
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  #16 (permalink)  
Old 10-25-2020, 12:39 PM
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Do you have a underdriven crank pulley? Retarded or over advanced timing can affect engine heat generated along with over concentrated antifreeze.
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  #17 (permalink)  
Old 10-25-2020, 03:17 PM
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Quote:
Originally Posted by Mark Brye View Post
When my car shipped from BackDraft after Speed Fanatix installed the engine, there was no thermostat installed. It overheated very easily. I think without the thermostat installed, the water was flowing through radiator too fast to have a chance to cool down. Did you check to see what thermostat you have and make sure its working correctly?

Cooling fan wired with correct polarity on the wiring?

What temp is Fan turning on at? Can you adjust what temp fan kicks on at?

The aluminum radiator you get from backdraft can be purchased with the mounting brackets installed as the aftermarket ones will mount a little different. I think the backdraft one also has option for the aluminum fan plenum and such….
One should always use a thermostat to keep proper operating temperature.
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  #18 (permalink)  
Old 10-25-2020, 04:10 PM
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Quote:
Originally Posted by 6TNCRZY View Post
Fan is not a huge issue at 40 MPH and above.
Unless it's not wired correctly and running in reverse...
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  #19 (permalink)  
Old 10-25-2020, 04:12 PM
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Good article here on radiators: https://www.stewartcomponents.com/in...ormation_id=13
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  #20 (permalink)  
Old 10-25-2020, 05:40 PM
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Quote:
Originally Posted by cycleguy55 View Post
Now you got my head spinning I thought aluminum heads cooled better than cast what am I missing?
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