Nissan 370Z Forum  

Experimenting with Intake Air Temp. Request for comments.

Originally Posted by SouthArk370Z Wow! Lots of great input. Thanks. Now I need to get some insulation, find a thermocouple, and figure out the best place to locate the t/c.

Go Back   Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain > Intake/Exhaust


Like Tree4Likes

Reply
 
LinkBack Thread Tools Display Modes
Old 12-19-2012, 10:48 PM   #16 (permalink)
A True Z Fanatic
 
gomer_110's Avatar
 
Join Date: Aug 2011
Location: Perrysburg, OH
Posts: 17,992
Drives: '11 Nismo #528 GM
Rep Power: 36941
gomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond repute
Default

Quote:
Originally Posted by SouthArk370Z View Post
Wow! Lots of great input. Thanks. Now I need to get some insulation, find a thermocouple, and figure out the best place to locate the t/c. No rest for the wicked.
For the insulation, you might look into HVAC duct insulation since I think you could probably a foil backed insulation.

Not sure what thermocouple "type" (I'd recommend type J based on the temp range) you plan on using but just twisting the two leads tightly together to form the junction is more than sufficient.
__________________
'11 370Z Nismo #528 Fast Intentions | Stillen | Motordyne | Uprev | CSF | Zspeed | Z1 Motorsports | AST | Swift | SPC | SPL | Whiteline | Hotchkis | Bride | Schroth | Robispec | Cusco | Nismo | Volk | Forgestar | Hoosier | RJM
'17 Titan Bone Stock
gomer_110 is offline   Reply With Quote
Old 12-19-2012, 11:36 PM   #17 (permalink)
Premium Member
 
SouthArk370Z's Avatar
 
Join Date: Nov 2010
Location: South Arkansas
Posts: 8,435
Drives: 2014 Challenger
Rep Power: 324198
SouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond repute
Default

Quote:
Originally Posted by gomer_110 View Post
For the insulation, you might look into HVAC duct insulation since I think you could probably a foil backed insulation.
There is an industrial insulating company about three miles from me. I don't have high hopes that they will have what I need, but, if they do, I might be able to get some free scraps. Then I'll try the HVAC place about 5 blocks away. If neither of them can help, the only other place I can think of is auto parts stores and see if they have some kind of thin, foiled exhaust blanket or header wrap with foil.

Quote:
Originally Posted by gomer_110 View Post
Not sure what thermocouple "type" (I'd recommend type J based on the temp range) you plan on using but just twisting the two leads tightly together to form the junction is more than sufficient.
My panel meter will take J, K, & T; any of which should do the job (plus R and S, but those aren't a good choice). For what I'm doing, twisting some extension wire together would probably do the job; relative readings will be more important than absolute accuracy. I have a J or K that I use to measure temp in the garage, but it is in an industrial sheath and has a lot of lag. Will try to find a real t/c, but could strip the sheath if need be.
__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma
SouthArk370Z is offline   Reply With Quote
Old 12-20-2012, 09:59 AM   #18 (permalink)
A True Z Fanatic
 
Z eliminator's Avatar
 
Join Date: Jul 2009
Location: Ontario Canada
Posts: 1,659
Drives: 370 Z 7AT Sports
Rep Power: 19
Z eliminator will become famous soon enough
Default

difference is 5.5 to 6 degres higher than the out side air temp. I have data logged it.
when driving at 100 kms. (stillen G3>)
Z
__________________
12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.
Z eliminator is offline   Reply With Quote
Old 12-20-2012, 10:30 AM   #19 (permalink)
A True Z Fanatic
 
Sh0velMan's Avatar
 
Join Date: Jan 2012
Location: Dallas/Ft.Worth
Posts: 3,349
Drives: Noisily.
Rep Power: 20
Sh0velMan has a brilliant futureSh0velMan has a brilliant futureSh0velMan has a brilliant futureSh0velMan has a brilliant futureSh0velMan has a brilliant futureSh0velMan has a brilliant futureSh0velMan has a brilliant futureSh0velMan has a brilliant futureSh0velMan has a brilliant futureSh0velMan has a brilliant futureSh0velMan has a brilliant future
Default

Quote:
Originally Posted by Z eliminator View Post
difference is 5.5 to 6 degres higher than the out side air temp. I have data logged it.
when driving at 100 kms. (stillen G3>)
Z
Yeah, when moving it's easy to keep close to ambient.

Mine is usually exactly the same as ambient when moving.
__________________
Buy My Car! | Build Thread
Sh0velMan is offline   Reply With Quote
Old 12-21-2012, 07:16 PM   #20 (permalink)
Premium Member
 
SouthArk370Z's Avatar
 
Join Date: Nov 2010
Location: South Arkansas
Posts: 8,435
Drives: 2014 Challenger
Rep Power: 324198
SouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond repute
Default

Got the intake air spare parts today. Everything from the radiator support to the throttle bodies.

Bought some insulation yesterday.

Took some preliminary temperature measurements last night. Six degrees difference between the VID and IAT readings! First guess is that VID is wrong.
Code:
Time   T/C  VID  IAT  Water
00:00  74   71   76   x
02:00  67   64   71   85
03:00  67   63   69   80
04:00  65   61   67   78
11:00  62   58   64   62
Stock setup. No mods made.
Had several fans blowing on radiator, air intake opening (removed filler plate between radiator support and bumper cover), and MAF area.
Unmounted ambient temp sensor and placed it and T/C together.
Car had to be started to get IAT and water temps.
T/C display was calibrated about 10 years ago, so absolute value may be off, but relative readings should be good. Will calibrate when I can find a standard.
__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma
SouthArk370Z is offline   Reply With Quote
Old 12-21-2012, 10:47 PM   #21 (permalink)
A True Z Fanatic
 
gomer_110's Avatar
 
Join Date: Aug 2011
Location: Perrysburg, OH
Posts: 17,992
Drives: '11 Nismo #528 GM
Rep Power: 36941
gomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond repute
Default

Quote:
Originally Posted by SouthArk370Z View Post
Got the intake air spare parts today. Everything from the radiator support to the throttle bodies.

Bought some insulation yesterday.

( Click to show/hide )
Took some preliminary temperature measurements last night. Six degrees difference between the VID and IAT readings! First guess is that VID is wrong.
Code:
Time   T/C  VID  IAT  Water
00:00  74   71   76   x
02:00  67   64   71   85
03:00  67   63   69   80
04:00  65   61   67   78
11:00  62   58   64   62
Stock setup. No mods made.
Had several fans blowing on radiator, air intake opening (removed filler plate between radiator support and bumper cover), and MAF area.
Unmounted ambient temp sensor and placed it and T/C together.
Car had to be started to get IAT and water temps.
T/C display was calibrated about 10 years ago, so absolute value may be off, but relative readings should be good. Will calibrate when I can find a standard.
Just curious, but what kind of insulation did you end up going with?
__________________
'11 370Z Nismo #528 Fast Intentions | Stillen | Motordyne | Uprev | CSF | Zspeed | Z1 Motorsports | AST | Swift | SPC | SPL | Whiteline | Hotchkis | Bride | Schroth | Robispec | Cusco | Nismo | Volk | Forgestar | Hoosier | RJM
'17 Titan Bone Stock
gomer_110 is offline   Reply With Quote
Old 12-21-2012, 11:29 PM   #22 (permalink)
Premium Member
 
SouthArk370Z's Avatar
 
Join Date: Nov 2010
Location: South Arkansas
Posts: 8,435
Drives: 2014 Challenger
Rep Power: 324198
SouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond repute
Default

Quote:
Originally Posted by gomer_110 View Post
Just curious, but what kind of insulation did you end up going with?
I checked with 3 HVAC shops and they didn't have anything. The industrial insulator didn't have time to talk. So off to the auto parts stores. All I could find was Thermo-Tech Thermo-Shield Tape and DEI Reflect-A-Cool. I have no idea how well they may insulate, but didn't have any choice. Neither seems to be particularly rugged, but should hold up long enough for my tests.

If you are looking for a recommendation, I don't know enough about either product, other than a perception of feeling "cheap" to the touch, to have an opinion. I'll post my findings as I go along.
__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma
SouthArk370Z is offline   Reply With Quote
Old 12-21-2012, 11:52 PM   #23 (permalink)
A True Z Fanatic
 
gomer_110's Avatar
 
Join Date: Aug 2011
Location: Perrysburg, OH
Posts: 17,992
Drives: '11 Nismo #528 GM
Rep Power: 36941
gomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond reputegomer_110 has a reputation beyond repute
Default

Quote:
Originally Posted by SouthArk370Z View Post
I checked with 3 HVAC shops and they didn't have anything. The industrial insulator didn't have time to talk. So off to the auto parts stores. All I could find was Thermo-Tech Thermo-Shield Tape and DEI Reflect-A-Cool. I have no idea how well they may insulate, but didn't have any choice. Neither seems to be particularly rugged, but should hold up long enough for my tests.

If you are looking for a recommendation, I don't know enough about either product, other than a perception of feeling "cheap" to the touch, to have an opinion. I'll post my findings as I go along.
Probably going to wrap my G3's with a material called refrasil. It's a ceramic fiber based cloth used in heat treat applications. Just hoping I have a enough scraps from work to fully wrap the intakes.
__________________
'11 370Z Nismo #528 Fast Intentions | Stillen | Motordyne | Uprev | CSF | Zspeed | Z1 Motorsports | AST | Swift | SPC | SPL | Whiteline | Hotchkis | Bride | Schroth | Robispec | Cusco | Nismo | Volk | Forgestar | Hoosier | RJM
'17 Titan Bone Stock
gomer_110 is offline   Reply With Quote
Old 01-21-2013, 01:54 AM   #24 (permalink)
A True Z Fanatic
 
roy'sz's Avatar
 
Join Date: Aug 2011
Location: palmdale, ca
Posts: 1,299
Drives: 2010 nissan 370z
Rep Power: 16
roy'sz will become famous soon enough
Default

so what is the conlclusion to this test? I read a little bit when it first came out but ignored afterwards until I got my dongle in the mail for the obdII system and read it through my android. Im averaging 5-8* difference at night and about 10-15 during the day. I commute 50 miles one way and during the day time i noticed when it was 78 or so that Inlet Air Temp was up. I also noticed here that there is one owner who has g3's and has the same temp fluxuation as most of us do. So how or why is it benificial for the g3's in comparison to short ram air intakes? Please no character assasination, I might be missing out on a very valuable point but just want some clarification before I pull the trigger on modifying my intake systems. One is sucking from outside the engine bay and one from inside, but we all have collant lines running through the throttle body so that does warm up the air before going into the plenum. So clarification would be greatly appreciated.
__________________
https://www.youtube.com/watch?v=RtvG...data_playerARK HFC'S-ARK Grip-Stillen G3-M370-UPREV-Kinetix upper control arm-WC Latheworks-Stage2 Bad@$$ Driver(318whp/268tq)-
roy'sz is offline   Reply With Quote
Old 01-21-2013, 10:07 AM   #25 (permalink)
Premium Member
 
SouthArk370Z's Avatar
 
Join Date: Nov 2010
Location: South Arkansas
Posts: 8,435
Drives: 2014 Challenger
Rep Power: 324198
SouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond repute
Default

Quote:
Originally Posted by roy'sz View Post
so what is the conlclusion to this test? I read a little bit when it first came out but ignored afterwards until I got my dongle in the mail for the obdII system and read it through my android. Im averaging 5-8* difference at night and about 10-15 during the day. I commute 50 miles one way and during the day time i noticed when it was 78 or so that Inlet Air Temp was up. I also noticed here that there is one owner who has g3's and has the same temp fluxuation as most of us do. So how or why is it benificial for the g3's in comparison to short ram air intakes? Please no character assasination, I might be missing out on a very valuable point but just want some clarification before I pull the trigger on modifying my intake systems. One is sucking from outside the engine bay and one from inside, but we all have collant lines running through the throttle body so that does warm up the air before going into the plenum. So clarification would be greatly appreciated.
No conclusions, yet. I'm waiting for a friend's daughter to insulate the spare air ducts I bought, but school and boys are slowing her down.

I would think that pulling cooler air from outside the engine compartment would be better.

From what I have read, yes, the TB coolant lines will warm up the air. If I can figure out a good way to measure the air temperature after the TB, I will collect that data also.
__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma
SouthArk370Z is offline   Reply With Quote
Old 01-21-2013, 01:13 PM   #26 (permalink)
A True Z Fanatic
 
roy'sz's Avatar
 
Join Date: Aug 2011
Location: palmdale, ca
Posts: 1,299
Drives: 2010 nissan 370z
Rep Power: 16
roy'sz will become famous soon enough
Default

you could drill a hole in the top of the intake and use a expoxy to seal up the whole if you use a thermocouple. Which brings the question of where is the intake air temp being read at? I thought it was the maf but I may be wrong. I don't disagree when it comes to pulling air outside, but here is my stumbling block. We as a customer are spending 150bucks on 3 degrees of air for 3 or 4 hp (gen3, aem, injen, etc) compared to a k&n or takeda? Most of the times cruising down the hwy the difference would be an avg of 5 or 6* right? if you are stuck in traffic then they both seem to have the same heat soak.

Also some useful information, the other night I took the wife out on date night in the z. When we left the resturante from dinner my intake air temp was around 130 from being parked for dinner. After some city driving (ambient temp was 44) it dropped down to about 95. When I got on the hwy it plummeted in a matter of 20-45 seconds to 46.
__________________
https://www.youtube.com/watch?v=RtvG...data_playerARK HFC'S-ARK Grip-Stillen G3-M370-UPREV-Kinetix upper control arm-WC Latheworks-Stage2 Bad@$$ Driver(318whp/268tq)-
roy'sz is offline   Reply With Quote
Old 01-21-2013, 01:39 PM   #27 (permalink)
Premium Member
 
SouthArk370Z's Avatar
 
Join Date: Nov 2010
Location: South Arkansas
Posts: 8,435
Drives: 2014 Challenger
Rep Power: 324198
SouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond repute
Default

Quote:
Originally Posted by roy'sz View Post
you could drill a hole in the top of the intake and use a expoxy to seal up the whole if you use a thermocouple.
I'd like to find a less permanent/destructive way to do it. There are several vacuum lines that I may be able to tee into (t/c through the run and current hose on the branch).
I still haven't found a good (ie, cheap) solution for taking 4-5 temperature readings at the same time. I have found a dual-channel t/c meter that I will be ordering this week or next, but at $9 I'm afraid that it will not be very be accurate. If it does turn out to be reasonably accurate, I'll order more.

Quote:
Originally Posted by roy'sz View Post
Which brings the question of where is the intake air temp being read at? I thought it was the maf but I may be wrong.
The ECU uses the MAF temperature on bank 1 for IAT.

Quote:
Originally Posted by roy'sz View Post
I don't disagree when it comes to pulling air outside, but here is my stumbling block. We as a customer are spending 150bucks on 3 degrees of air for 3 or 4 hp (gen3, aem, injen, etc) compared to a k&n or takeda? Most of the times cruising down the hwy the difference would be an avg of 5 or 6* right? if you are stuck in traffic then they both seem to have the same heat soak.
I'm trying to see what can be done to the stock setup. I'm not worried so much about an increase in HP, but rather keeping IAT below where the ECU starts pulling timing (which I suppose is, in effect, a boost in HP).
If the insulation works well enough, I won't need to spend money on a CAI.

Quote:
Originally Posted by roy'sz View Post
Also some useful information, the other night I took the wife out on date night in the z. When we left the resturante from dinner my intake air temp was around 130 from being parked for dinner. After some city driving (ambient temp was 44) it dropped down to about 95. When I got on the hwy it plummeted in a matter of 20-45 seconds to 46.
I've noticed much the same. Takes forever to get temps back to normal at city speeds after a long stop.
Did coolant temp go way up, also? Was the big drop at the same time that coolant temp dropped? The TB coolant loop may be having a larger effect on IAT than I suspect.
__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma
SouthArk370Z is offline   Reply With Quote
Old 01-21-2013, 01:58 PM   #28 (permalink)
A True Z Fanatic
 
roy'sz's Avatar
 
Join Date: Aug 2011
Location: palmdale, ca
Posts: 1,299
Drives: 2010 nissan 370z
Rep Power: 16
roy'sz will become famous soon enough
Default

I am not suggesting the hp gain merely the effect of the three degrees of differing temp. I suspect the same with the tb coolant lines but nissan tech stated it was for cooling the air prior to entering the plenum. My radiator does cool rather fast but ambient temp was 44 and had almost no traffic at night.. During warmer weather it is true for temps to take longer to drop, havent had my reader during summer or warm weather but am anxious for the results. However when it was 80* out on my way to work heat soak was apparent in a matter of 2 mins.

Also if it is reading from maf then thats not a accuate readi g due to the fact that there is a heat source at the tb. In my opinion this is a faulty design.
__________________
https://www.youtube.com/watch?v=RtvG...data_playerARK HFC'S-ARK Grip-Stillen G3-M370-UPREV-Kinetix upper control arm-WC Latheworks-Stage2 Bad@$$ Driver(318whp/268tq)-
roy'sz is offline   Reply With Quote
Old 01-30-2013, 01:32 PM   #29 (permalink)
Premium Member
 
SouthArk370Z's Avatar
 
Join Date: Nov 2010
Location: South Arkansas
Posts: 8,435
Drives: 2014 Challenger
Rep Power: 324198
SouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond reputeSouthArk370Z has a reputation beyond repute
Default

I gave up on getting my friend's daughter to insulate the intake ducts and started doing it myself. It's slow work and it ain't pretty. The insulation is not very thick, but the silvered cover should reflect a lot of heat. Will post some pics later this week.
__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma
SouthArk370Z is offline   Reply With Quote
Old 01-30-2013, 03:33 PM   #30 (permalink)
A True Z Fanatic
 
roy'sz's Avatar
 
Join Date: Aug 2011
Location: palmdale, ca
Posts: 1,299
Drives: 2010 nissan 370z
Rep Power: 16
roy'sz will become famous soon enough
Default

getting a woman to do a mans job most of the time is a fail lol. I was able to purchase some gen3's. But still in it for the results. I think the most common problem is air flow. But we shall see. Good luck with the results!
__________________
https://www.youtube.com/watch?v=RtvG...data_playerARK HFC'S-ARK Grip-Stillen G3-M370-UPREV-Kinetix upper control arm-WC Latheworks-Stage2 Bad@$$ Driver(318whp/268tq)-
roy'sz is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Intake air temp data (Stillen Gen 3, need stock) wstar Intake/Exhaust 13 02-06-2013 04:52 PM
Picture Comments SgtGoldy The370Z.com Feedback, Suggestions & Questions 13 07-29-2010 12:22 PM
fs: Megan Racing Oil Temp/Water Temp/Oil Psi Gauge cossie1600 Parts for sale (Private Classifieds) 0 04-13-2010 10:17 PM
Ahh youtube comments vash_241987 The Lounge (Off Topic) 12 04-10-2010 03:35 PM
Are you getting any comments or looks from strangers? Diesel370 Nissan 370Z General Discussions 3 01-15-2009 10:18 PM


All times are GMT -5. The time now is 11:29 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2