How can you keep engine temps down?
06-25-2007, 05:24 AM
#1
Registered User
Thread Starter
iTrader: (7)
Join Date: Dec 2003
Location: THE MIA
Posts: 3,030
Likes: 0
Received 0 Likes
on
0 Posts
How can you keep engine temps down?
I was hanging out with Chris (CT350Z) last night, and even though we both drove short distances to the local starbux, when we popped our hoods, it was crazy hot. Even after about 40 mins. I can only imagine the amounts of heat radiated by a turbo. Is there any kinda of solution to making the engine bay cooler? Just curious and I've never seen stuff for that.
We are in Miami, which at 11:00pm it's still 84 degrees outside.
The only thing I can think of is like a large cooling fan. I'm a huge fan of the Shelby Cobra. I've noticed on some of the kit cars, people have installed Large fans in order to cool the radiator and engine bay. Cobra's tend to run high temps in bumper to bumper traffic.
We are in Miami, which at 11:00pm it's still 84 degrees outside.
The only thing I can think of is like a large cooling fan. I'm a huge fan of the Shelby Cobra. I've noticed on some of the kit cars, people have installed Large fans in order to cool the radiator and engine bay. Cobra's tend to run high temps in bumper to bumper traffic.
06-25-2007, 06:28 AM
#3
1) Better Radiator would help.
2) The addition of an Oil Cooler would help.
3) Wrapping your headers would help.
4) Vented hood would help.
5) Wiring up a relay to your oem fan would give you the ability to run the fan when you wanted, as opposed to the temp sensor tripping it.
2) The addition of an Oil Cooler would help.
3) Wrapping your headers would help.
4) Vented hood would help.
5) Wiring up a relay to your oem fan would give you the ability to run the fan when you wanted, as opposed to the temp sensor tripping it.
06-25-2007, 07:07 AM
#4
Here is a short-list of suggestions:
1) Upgraded large core radiator
2) Oil Cooler
3) Upgraded Spal Fans 2400cfm (GTM has a kit that we use on the strokers, and track engines)
4) Switch to Evans NPG+ waterless coolant
5) Vented Hood
6) For track events, remove the windshield diffusers, and weather stripping near the firewall.
1) Upgraded large core radiator
2) Oil Cooler
3) Upgraded Spal Fans 2400cfm (GTM has a kit that we use on the strokers, and track engines)
4) Switch to Evans NPG+ waterless coolant
5) Vented Hood
6) For track events, remove the windshield diffusers, and weather stripping near the firewall.
06-25-2007, 05:57 PM
#5
Originally Posted by Sharif@Forged
Here is a short-list of suggestions:
1) Upgraded large core radiator
2) Oil Cooler
3) Upgraded Spal Fans 2400cfm (GTM has a kit that we use on the strokers, and track engines)
4) Switch to Evans NPG+ waterless coolant
5) Vented Hood
6) For track events, remove the windshield diffusers, and weather stripping near the firewall.
1) Upgraded large core radiator
2) Oil Cooler
3) Upgraded Spal Fans 2400cfm (GTM has a kit that we use on the strokers, and track engines)
4) Switch to Evans NPG+ waterless coolant
5) Vented Hood
6) For track events, remove the windshield diffusers, and weather stripping near the firewall.
Are the Spal fans g35/350z specific?
06-26-2007, 05:49 AM
#7
Originally Posted by meatbag
Are the Spal fans g35/350z specific?
Trending Topics
06-26-2007, 05:50 AM
#8
Originally Posted by Q45tech
Remember the cylinder head temperature is what's important. The inexpensive coolant temp sensors are used as a low cost surrogate.
06-26-2007, 12:19 PM
#10
Registered User
Thread Starter
iTrader: (7)
Join Date: Dec 2003
Location: THE MIA
Posts: 3,030
Likes: 0
Received 0 Likes
on
0 Posts
Great info guys. I appreciate the input. I will be going FI sometime this year and I'm looking at ways to keep temps down, since it's about 85 almost year round.
06-26-2007, 12:19 PM
#11
Registered User
Join Date: Oct 2003
Location: Marietta, Georgia
Posts: 984
Likes: 0
Received 0 Likes
on
0 Posts
Any coolant temp above 199.9F signals ecu to begin to reduce ignition advance usually 1.0 degree per 5F increment . 226F would be a ~~ 5.0 degree reduction.
Built in Summer overheat protection software.
Built in Summer overheat protection software.
06-26-2007, 12:29 PM
#12
Registered User
iTrader: (11)
Join Date: Oct 2006
Location: Burbank, CA
Posts: 631
Likes: 0
Received 0 Likes
on
0 Posts
as far as engine radiant heat, after i put in my iso thermal plenum spacer with the coolant control valve i felt a huge difference in temp. i can pop my hood after a 30 minute drive and have very lil heat
06-26-2007, 06:59 PM
#13
Registered User
Join Date: Sep 2005
Location: NJ
Posts: 183
Likes: 0
Received 0 Likes
on
0 Posts
Normally on the streets, in NJ, with AC on, I rarely see my coolant temp above 200 F, but couple weeks ago I had a ~10 seconds spike of 226F coolant temp on the road course with ~215F being average for the session.
Q45tech, I remember reading your posts in water wetter or royal purple ice? thread so I will be buying distilled water soon.
However, looking at the Cipher logs I didn’t notice much, if any, ignition timing being pulled down (with ~29 degrees being average while at WOT) as the coolant temp raised from 195 to 221 F.
Sharif, I will try removing windshield diffusers but wonder if that would have any negative effect on the front down-force?
Jes-Z, I apologize if this is thread highjack.
Btw, I already have MD’s 1/2" Thermo Spacer + Copper Thermal Kit
Q45tech, I remember reading your posts in water wetter or royal purple ice? thread so I will be buying distilled water soon.
However, looking at the Cipher logs I didn’t notice much, if any, ignition timing being pulled down (with ~29 degrees being average while at WOT) as the coolant temp raised from 195 to 221 F.
Sharif, I will try removing windshield diffusers but wonder if that would have any negative effect on the front down-force?
Jes-Z, I apologize if this is thread highjack.
Btw, I already have MD’s 1/2" Thermo Spacer + Copper Thermal Kit
06-27-2007, 06:43 AM
#15
Registered User
Join Date: Oct 2003
Location: Marietta, Georgia
Posts: 984
Likes: 0
Received 0 Likes
on
0 Posts
These high coolant ignition advance reductions occur at idle and low- mid rpms/load conditions. At some upper rpm [WOT] the KS system is disregarded along with summer protection..............assumming that an emergency acceleration is required thus reliability and longevity is less important than avoiding a head on collision from reduced power in a pass.
The fact that the coolant temp is a surrogate for cylinder head temperature means it can be trimmed with variable resistor [10-50 ohms in series] to make ecu see a lower temperature...................don't get carried away 5F colder would be considered max.
Distilled water, 20% AF for corrosion, Wetter Water or other, and -5F correction...........might be good for Summer.
Years ago BMW had toggle switches in a sealed box under hood to trim coolant sensor, fuel enrichment, and ignition advance to allow cars to be sold across Europe where fuel quality and temperature varied ---------Sweden to Sicily. poor mans tune
The fact that the coolant temp is a surrogate for cylinder head temperature means it can be trimmed with variable resistor [10-50 ohms in series] to make ecu see a lower temperature...................don't get carried away 5F colder would be considered max.
Distilled water, 20% AF for corrosion, Wetter Water or other, and -5F correction...........might be good for Summer.
Years ago BMW had toggle switches in a sealed box under hood to trim coolant sensor, fuel enrichment, and ignition advance to allow cars to be sold across Europe where fuel quality and temperature varied ---------Sweden to Sicily. poor mans tune
Last edited by Q45tech; 06-27-2007 at 06:46 AM.
06-27-2007, 09:29 AM
#17
Registered User
Thread Starter
iTrader: (7)
Join Date: Dec 2003
Location: THE MIA
Posts: 3,030
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by dovla
Normally on the streets, in NJ, with AC on, I rarely see my coolant temp above 200 F, but couple weeks ago I had a ~10 seconds spike of 226F coolant temp on the road course with ~215F being average for the session.
Q45tech, I remember reading your posts in water wetter or royal purple ice? thread so I will be buying distilled water soon.
However, looking at the Cipher logs I didn’t notice much, if any, ignition timing being pulled down (with ~29 degrees being average while at WOT) as the coolant temp raised from 195 to 221 F.
Sharif, I will try removing windshield diffusers but wonder if that would have any negative effect on the front down-force?
Jes-Z, I apologize if this is thread highjack.
Btw, I already have MD’s 1/2" Thermo Spacer + Copper Thermal Kit
Q45tech, I remember reading your posts in water wetter or royal purple ice? thread so I will be buying distilled water soon.
However, looking at the Cipher logs I didn’t notice much, if any, ignition timing being pulled down (with ~29 degrees being average while at WOT) as the coolant temp raised from 195 to 221 F.
Sharif, I will try removing windshield diffusers but wonder if that would have any negative effect on the front down-force?
Jes-Z, I apologize if this is thread highjack.
Btw, I already have MD’s 1/2" Thermo Spacer + Copper Thermal Kit
Thread
Thread Starter
Forum
Replies
Last Post
liqalu04
Engine & Drivetrain
31
01-02-2022 12:58 PM
ars88
Zs & Gs For Sale
18
04-04-2016 07:52 AM
