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Thread: What thermostat does Ford Racing use in their 302 Boss crate engines?

  1. 08-26-2010, 10:16 PM #1
    marunos
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    What thermostat does Ford Racing use in their 302 Boss crate engines?

    Hello,
    I installed crate engine M-6007-X302B(302 CID BOSS BLOCK with GT-40 HEADS AND B CAM from ford racing) on my 1990 Mustang. Does anyone know what Thermostat does this engine have? 180 ?


    I am asking this because I find my gauge (Autometer Gauge hooked into thermostat neck) is reading temperature at about 200-210 F. Also, my stock gauge would read at this range. The temperature where I live is about 42-45 C and the humidity is very high. So am I in the right range of the engine operating temperature? Note that I do not have any coolant leak.
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    Last edited by marunos; 03-07-2011 at 04:35 PM.
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  2. 08-26-2010, 10:51 PM #2
    12second5.0
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    Factory thermostat was a 192.
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  3. 08-27-2010, 04:53 AM #3
    marunos
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    Quote Originally Posted by 12second5.0 View Post
    Factory thermostat was a 192.
    I was just told that this engine does not come with thermo.. so I would check the one it has right now. Some people say 200-210 does not sound high. I was just wondering because my brother's stock 5.0 would read about 175-185 and he is living in a place where temp is about 35-38 C right now. So I am not really sure is it the place, engine or something is wrong with my cooling system!
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    Last edited by marunos; 03-07-2011 at 04:35 PM.
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  4. 08-27-2010, 07:34 AM #4
    2k4mk1
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    I have a 180 and a 100% new cooling sys (rad pump etc..) with elec fan set to come on at 200. Car runs 200-210 even in 100+ temps. The motor needs some heat to perform best 210-220 is not hot at all.

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  5. 08-27-2010, 09:50 AM #5
    Sonic Blue 85
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    I don't like running engines at anywhere over 190, GM likes to run their engine on the verge of be cooked, but not me. With the amount of timing Fords like, I would never run one hard, if the temps were any higher than 190. If the temps get any higher than 190, I would just baby it around until you can get it cooled off. I would stick with the 180 degree thermostat, that is probably the best choice for a Ford. Sounds like you may need more fan or radiator or both.
    Also since I don't have a thermomitter to look at right now, so I don't know what those air temps you are giving in celcius equate to in farenheight. So I have no clue how hot it is where you are, speak American.
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  6. 08-27-2010, 11:36 AM #6
    2k4mk1
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    place where temp is about 35-38 C right now.

    that is 98-100.4F

    Ron mine seems to do fine at 200-210.....Never gets any hotter than that even idleing in traffic. Usually it runs about 190-200 on the mech temp gauge.

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  7. 08-27-2010, 11:43 AM #7
    marunos
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    Quote Originally Posted by Sonic Blue 85 View Post
    I don't like running engines at anywhere over 190, GM likes to run their engine on the verge of be cooked, but not me. With the amount of timing Fords like, I would never run one hard, if the temps were any higher than 190. If the temps get any higher than 190, I would just baby it around until you can get it cooled off. I would stick with the 180 degree thermostat, that is probably the best choice for a Ford. Sounds like you may need more fan or radiator or both.
    Also since I don't have a thermomitter to look at right now, so I don't know what those air temps you are giving in celcius equate to in farenheight. So I have no clue how hot it is where you are, speak American.
    You always can use online units converter
    Convert Temperature - Unit Converter

    42-45 C = 108-113 F
    35-38 C = 95-100 F

    You might be right, it is not recommended to run it at higher than 190. How about Power Stat 180 Hypertech thermostat? Any idea?
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    Last edited by marunos; 03-07-2011 at 04:36 PM.
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  8. 08-27-2010, 11:49 AM #8
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    Quote Originally Posted by 2k4mk1 View Post
    place where temp is about 35-38 C right now.

    that is 98-100.4F

    Ron mine seems to do fine at 200-210.....Never gets any hotter than that even idleing in traffic. Usually it runs about 190-200 on the mech temp gauge.
    It is the same with me, SOMETIMES it gets 210-215 in traffic, but it will run like 200 most of the time. My worries are that I am running my engine too hot, and this might have an impact on the engine's life.
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    Last edited by marunos; 03-07-2011 at 04:36 PM.
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