Nismo Thermostat.....
12-20-2003, 10:34 AM
#4
Registered User
Join Date: Dec 2002
Location: Maryland
Posts: 2,700
Likes: 0
Received 0 Likes
on
0 Posts
What do you want to know dude? It is thermostat. It opens up at a lower temperature to allow the coolant to flow earlier. So what? The engine will still eventually arrive at the same operating temperature anyways. It just takes longer. A waste of money especially in the frozen tundra land that you live in that has obviously frozen your sense of logic. And for 140 dollars it is a giant rip off. Not against Performance but against NISMO. It comes with a new housing so it costs way more than a thermostat should (5 bucks).
Last edited by FLY BY Z; 12-20-2003 at 12:05 PM.
12-20-2003, 12:07 PM
#7
Registered User
Join Date: Dec 2002
Location: Maryland
Posts: 2,700
Likes: 0
Received 0 Likes
on
0 Posts
Sorry, I thought the filters would catch how I really felt. I changed it. I am taking online def. driv. and didn't check my post. i do deserve a strike for that appearing. my bad. i edited it.
Trending Topics
12-20-2003, 01:55 PM
#8
Sponsor
Join Date: Jun 2003
Location: SoKal Desert
Posts: 268
Likes: 0
Received 0 Likes
on
0 Posts
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.
My G35 AT Sedan came with a 180F thermostat with a 23F range (fully open at 203F). I replaced it with a high dollar (<$15.00) 170F 350Z Thermostat Assembly and Gasket. I passed on the 160F Nismo t-stat for obvious reasons.
DaveO
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.
My G35 AT Sedan came with a 180F thermostat with a 23F range (fully open at 203F). I replaced it with a high dollar (<$15.00) 170F 350Z Thermostat Assembly and Gasket. I passed on the 160F Nismo t-stat for obvious reasons.
DaveO
Last edited by DaveO; 12-21-2003 at 08:05 AM.
12-21-2003, 12:10 AM
#9
I was not 100% sure of the temp raiting of the nismo thermostat. I just wanted to get it on the site since we have had such demand for these and we got the only ones in the states (that we know of)...
I need to speak with NISMO about the temp raiting for this specific thermostat. I took the spec's off the other nismo thermo's we have.
the unit also comes with new gaskets..
I need to speak with NISMO about the temp raiting for this specific thermostat. I took the spec's off the other nismo thermo's we have.
the unit also comes with new gaskets..
12-21-2003, 05:15 AM
#10
Registered User
Join Date: Jul 2003
Location: Allen, TX
Posts: 3,407
Likes: 0
Received 0 Likes
on
0 Posts
Yes please get the specs. 150 bucks for 10 degres is too much. Also buying a t-stat is good only if you have fans to keep the car running cool. Since we have no way on controlling the fans its pointless to purchase a t-stat.
On my LS1 we were able to run a 160 t-stat, b/c we set the fans to go on and off at certain temps.
On my LS1 we were able to run a 160 t-stat, b/c we set the fans to go on and off at certain temps.
Last edited by FairladyZ; 12-21-2003 at 05:22 AM.
12-21-2003, 07:20 AM
#11
Registered User
Join Date: Sep 2003
Location: Land of Ice & Snow
Posts: 106
Likes: 0
Received 0 Likes
on
0 Posts
There is a certain temp range that a car is designed to run, and they are designed that way to give you the best fuel milage, and to control pollution. Now we all know that sipping less fuel and keeping the air cleaner is not the best for performance. As your engine heats up, ECU is reading the temps, adjusting fuel and adjusting the timing.
A cooler running t-stat would be nice, but not for $150!!!
A cooler running t-stat would be nice, but not for $150!!!
12-21-2003, 08:46 AM
#12
Sponsor
Join Date: Jun 2003
Location: SoKal Desert
Posts: 268
Likes: 0
Received 0 Likes
on
0 Posts
FairladyZ,
Beg to differ with your statement... "Also buying a t-stat is good only if you have fans to keep the car running cool. Since we have no way on controlling the fans its pointless to purchase a t-stat."
IMO, a properly designed cooling system like those on the 350Zs and G35s the fans stay out of the picture until the thermostat is fully open or the AC compressor is energized (under certain conditions.)
We need to remember that the fans don't run when the car's at speed due to the high volume of air flowing through the radiator. Electric fans are designed to operate at idle and low speed conditions.
I estimate that the 350Z electric fans come on around 205F coolant temperature. A 10 degree differential is not uncommon to prevent the fans and thermostat from working against each other.
I've spent considerable time in the 350Z service manual looking for the exact number but have yet to find it. Can anyone help?
DaveO
Beg to differ with your statement... "Also buying a t-stat is good only if you have fans to keep the car running cool. Since we have no way on controlling the fans its pointless to purchase a t-stat."
IMO, a properly designed cooling system like those on the 350Zs and G35s the fans stay out of the picture until the thermostat is fully open or the AC compressor is energized (under certain conditions.)
We need to remember that the fans don't run when the car's at speed due to the high volume of air flowing through the radiator. Electric fans are designed to operate at idle and low speed conditions.
I estimate that the 350Z electric fans come on around 205F coolant temperature. A 10 degree differential is not uncommon to prevent the fans and thermostat from working against each other.
I've spent considerable time in the 350Z service manual looking for the exact number but have yet to find it. Can anyone help?
DaveO
Last edited by DaveO; 12-21-2003 at 05:04 PM.
12-21-2003, 04:22 PM
#13
Registered User
Join Date: Jul 2003
Location: Allen, TX
Posts: 3,407
Likes: 0
Received 0 Likes
on
0 Posts
Dave
The way the fans work is by engine temp set by Nissan. I cant remember off hand what temps the fan came on on the Ls1, but I am assuming it is the same for the 350Z's. When we installed the t-stat we set the temps lower, so the fans came on sooner and truned off sooner. Thus causing the car to run alot cooler around 160, for more performance (ran more timing etc.).
That is exactly right. B4 we changed the fan settings I was still running at stock normal operating temp even though I had the 160 t-stat in.
The way the fans work is by engine temp set by Nissan. I cant remember off hand what temps the fan came on on the Ls1, but I am assuming it is the same for the 350Z's. When we installed the t-stat we set the temps lower, so the fans came on sooner and truned off sooner. Thus causing the car to run alot cooler around 160, for more performance (ran more timing etc.).
It is thermostat. It opens up at a lower temperature to allow the coolant to flow earlier. So what? The engine will still eventually arrive at the same operating temperature anyways.
12-21-2003, 04:32 PM
#14
Registered User
iTrader: (1)
Join Date: Dec 2003
Location: Port Orchard, WA
Posts: 1,648
Likes: 0
Received 0 Likes
on
0 Posts
unless were running FI or nitrous why should it matter to keep the engine a little cooler ????
also why buy the thermo??? why just not make a switch attached to the fans to turn them on extra when ur cooling off at the track...??? this is assuming that ur running NA
also why buy the thermo??? why just not make a switch attached to the fans to turn them on extra when ur cooling off at the track...??? this is assuming that ur running NA
Last edited by redline350ZZ; 12-21-2003 at 04:37 PM.
12-21-2003, 07:11 PM
#16
Registered User
Join Date: Dec 2002
Location: Maryland
Posts: 2,700
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Jumbosock
If you don't want to pay for a new thermostat, a ghetto setup would be to drill a couple small holes in your thermostat.
If you don't want to pay for a new thermostat, a ghetto setup would be to drill a couple small holes in your thermostat.
12-22-2003, 10:20 AM
#17
Former Sponsor
iTrader: (564)
Join Date: Feb 2003
Location: Long Island, New York
Posts: 19,266
Likes: 0
Received 5 Likes
on
5 Posts
while expensive, a colder t stat does serve a purpose for guys who do lots of track days in hot weather - it will open more frequently, thus cycling the coolant through the engine more frequently
Thread
Thread Starter
Forum
Replies
Last Post
ars88
Zs & Gs For Sale
18
04-04-2016 07:52 AM
350z, at, control, fan, fcon, find, nismo, nissan, open, procharger, reason, replacement, temp, thermastat, thermostat
