AT Sedan Modification
#16
12-19-2003 | 01:55 AM
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Joined: Dec 2003
Posts: 133
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From: Scottsdale, Az
Re: AT Sedan Modification
This could be a VERY good mod for those of you in hotter climates (like myself in Arizona). Considering how inexpensive it is I wouldn't hesitate it at all. Looks like it's just the AT sedan that had the different P/N 21200-31U13. However, it also shows the other P/N 21200-4W010 to be a valid part option on the AT Sedan as well, go figure. But if you plug the other cars in (coupe or 6mt sedan) the 31U13 doesn't come up as an option.
Another great mod is to get either the NISMO radiator cap (1.3bar) or 300zx twin turbo radiator cap (1.2bar) to replace the factory cap (0.9 bar). The Z cap is much cheaper, and a better buy, IMHO. I have had one on my car for quite a while now.
Hope this helps!
I also have a real water temp gauge in my car though, so i can tell you the exact water temp, rather than "the needle looks normal" heh.
Justin McClanahan
Heavily Modified 95 Infiniti G20
www.InfinitiPartsUSA.com
Another great mod is to get either the NISMO radiator cap (1.3bar) or 300zx twin turbo radiator cap (1.2bar) to replace the factory cap (0.9 bar). The Z cap is much cheaper, and a better buy, IMHO. I have had one on my car for quite a while now.
Hope this helps!
I also have a real water temp gauge in my car though, so i can tell you the exact water temp, rather than "the needle looks normal" heh.
Justin McClanahan
Heavily Modified 95 Infiniti G20
www.InfinitiPartsUSA.com
#18
12-19-2003 | 02:07 AM
Registered User
Joined: Dec 2003
Posts: 133
Likes: 0
From: Scottsdale, Az
Re: AT Sedan Modification
Higher pressure = higher boiling point.
Justin McClanahan
Heavily Modified 95 Infiniti G20
www.InfinitiPartsUSA.com
Justin McClanahan
Heavily Modified 95 Infiniti G20
www.InfinitiPartsUSA.com
#19
12-20-2003 | 06:00 PM
Joined: Aug 2002
Posts: 1,129
Likes: 0
From: Hi Desert, Kalifornia
Re: AT Sedan Modification
There seems to be some confusion on cooling system theory, as I remember basic auto shop 101...
An internal combustion engine's cooling system has only one purpose... to remove excess heat.
A properly designed cooling system has a significant amount of overcapacity to allow for high load conditions on hot days. Therefore, it also has the capacity to severely overcool (<100F) the engine under light loads on cold days or under steady high speed driving conditions on cool days. Therefore, under all driving conditions, the engine's cooling capacity must change with engine load and ambient conditions. That's the function of the thermostat.
The thermostat is a heat sensitive regulating valve that allows coolant to flow through the radiator at temperatures above its set point and completely cuts off that flow at temperatures below its set point. One function that is often overlooked is that the thermostat also regulates coolant flow between its full closed and full open position.
The stock 350Z and G35 Coupe thermostat remains closed below 170 degrees Fahrenheit. It starts to open as the coolant temperature increases above its setpoint (170F) and continues to open further as the coolant temperature increases until fully open at 194F. As you can see, within the 24 degrees "range" between 170F and 194F, the engine's cooling capacity goes from zero to full capacity of the system. If the coolant temperature does not drop below 170F or go above 194F, then the thermostat will continue to regulate coolant flow.
The AT Sedan's thermostat starts to open at 180F and is fully open at 203F providing a 23F "range".
DaveO
2003 G35 Sedan - DP / Willow / AT / Premium / Sport
350Z Engine Cover, T-Stat & Air Duct / Stillen CAI
GG 7-Wire H-G Kit / TechnoSquare ECU
Street Edge TC / Stillen Exhaust System
An internal combustion engine's cooling system has only one purpose... to remove excess heat.
A properly designed cooling system has a significant amount of overcapacity to allow for high load conditions on hot days. Therefore, it also has the capacity to severely overcool (<100F) the engine under light loads on cold days or under steady high speed driving conditions on cool days. Therefore, under all driving conditions, the engine's cooling capacity must change with engine load and ambient conditions. That's the function of the thermostat.
The thermostat is a heat sensitive regulating valve that allows coolant to flow through the radiator at temperatures above its set point and completely cuts off that flow at temperatures below its set point. One function that is often overlooked is that the thermostat also regulates coolant flow between its full closed and full open position.
The stock 350Z and G35 Coupe thermostat remains closed below 170 degrees Fahrenheit. It starts to open as the coolant temperature increases above its setpoint (170F) and continues to open further as the coolant temperature increases until fully open at 194F. As you can see, within the 24 degrees "range" between 170F and 194F, the engine's cooling capacity goes from zero to full capacity of the system. If the coolant temperature does not drop below 170F or go above 194F, then the thermostat will continue to regulate coolant flow.
The AT Sedan's thermostat starts to open at 180F and is fully open at 203F providing a 23F "range".
DaveO
2003 G35 Sedan - DP / Willow / AT / Premium / Sport
350Z Engine Cover, T-Stat & Air Duct / Stillen CAI
GG 7-Wire H-G Kit / TechnoSquare ECU
Street Edge TC / Stillen Exhaust System
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