Name all the methods of cooling down your RX-7
11-22-01, 08:05 PM
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Name all the methods of cooling down your RX-7
My ways of overcoming over heating.
1. Decrease restriction of exiting exhaust gases > downpipe, midpipe, catback
2. 2nd oil cooler (R1 equiped)
3. Fan mod http://rx7.voodoobox.net/howto/fanswitch/fanswitch.html
4. Larger aluminum radiator (will not work well with front mount intercooler-FMIC)
5. Vented hood (works well with aluminum radiator, even with a FMIC)
6. Ratio of coolant to dH20 > 30%:70% respectively or Evans waterless coolant https://www.rx7club.com/vforums/show...ght=Thermostat
7. A 190 degree coolant thermostat.
8. A water thermostat switch that has 0.5 ohms maximum resistance at less than 214 degrees
1-6 I've done.
I have questions on 7 and 8. What 190 degree thermostat would be capatable with the FD, part number? What if you ran without a thermostat? Is number 8 too excessive?
1. Decrease restriction of exiting exhaust gases > downpipe, midpipe, catback
2. 2nd oil cooler (R1 equiped)
3. Fan mod http://rx7.voodoobox.net/howto/fanswitch/fanswitch.html
4. Larger aluminum radiator (will not work well with front mount intercooler-FMIC)
5. Vented hood (works well with aluminum radiator, even with a FMIC)
6. Ratio of coolant to dH20 > 30%:70% respectively or Evans waterless coolant https://www.rx7club.com/vforums/show...ght=Thermostat
7. A 190 degree coolant thermostat.
From Firas Arabo
"I would agree with Kyle on going with the stock t-stat next time around. According to Peter, for optimal performance the ECU wants to see a water temp reading of no less than 180. Below that point, the computer is still is warm up/protective mode. Solenoids, secondary butterflies and injectors all work as if the car was still cold. This is especially a problem on the highway since temps will drop below the 180 mark and get pretty close to 170. The difference in the minimum running temperature on the highway at around 70 mph is only about 10 degrees, and as it turns out, that's 10 degrees too cold."
"I would agree with Kyle on going with the stock t-stat next time around. According to Peter, for optimal performance the ECU wants to see a water temp reading of no less than 180. Below that point, the computer is still is warm up/protective mode. Solenoids, secondary butterflies and injectors all work as if the car was still cold. This is especially a problem on the highway since temps will drop below the 180 mark and get pretty close to 170. The difference in the minimum running temperature on the highway at around 70 mph is only about 10 degrees, and as it turns out, that's 10 degrees too cold."
1-6 I've done.
I have questions on 7 and 8. What 190 degree thermostat would be capatable with the FD, part number? What if you ran without a thermostat? Is number 8 too excessive?
11-22-01, 08:14 PM
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9. I forgot you can also tape, or block with aluminum sheets the gaps in your undercover (radiator duct) to increase air flow to the radiator. I have yet to do this.
http://www.iluvmyrx7.com/How-To_s/En...nderbelly2.jpg
http://www.iluvmyrx7.com/How-To_s/En...nderbelly2.jpg
11-23-01, 02:22 AM
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Pull your A/C relay out. Them turn the A/C on and turn the fan to 3, this will kick the radiator fans on high.
I saw close to a 10 C, drop in temps while driving around town by doing this.
I saw close to a 10 C, drop in temps while driving around town by doing this.
11-23-01, 05:43 PM
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My dailey temp here in sunny California is 210 and creeping at idle and speeds lower than 40 mph. At highway speeds of 60+ mph it drops down to 190. Hope some info here helps others out.
11-26-01, 09:43 AM
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You can add "Water Wetter" to your coolant. It is made by Redline and I got it at Pep Boys. It supposed to help your coolant do a better job by changing the surface tension of the water. Also, you can wrap the downpipe with a special material. This insulation helps the heat exit the exhaust instead getting under the hood.
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11-26-01, 02:16 PM
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You can also open up the air intake to the radiator by breaking the supports that hold the bottom lip of the opening on the body and doing something to pull it down.
A better and cheaper alternative to adding an extra oil cooler is to add an extra radiator in the same place. Yes, cooling the oil does help cool the engine, but most of the cooling is done by the radiator. Adding more area to the raditor is more effective than adding an extra oil cooler.
I have done this and it works great. I used an oil cooler as the extra radiator and connected it in parallel with the stock radiator.
A better and cheaper alternative to adding an extra oil cooler is to add an extra radiator in the same place. Yes, cooling the oil does help cool the engine, but most of the cooling is done by the radiator. Adding more area to the raditor is more effective than adding an extra oil cooler.
I have done this and it works great. I used an oil cooler as the extra radiator and connected it in parallel with the stock radiator.
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