IAT range

[ImpalaSlayer]

for those of you with boost and that monitor you IATs, i was wonder what you guys normally see on the hotter days. the other day it was about 75* out and my iat under normal driving conditions was about 115-125. does that seem about right? what do you feel is the higher side of the safe margin?

[-Matt-]

over9000!!

[ImpalaSlayer]

over9000!!

lol my engine would definitely splode

[-Matt-]

lol my engine would definitely splode

http://www.alphasnail.com/thegoat/iSplode.png

[ImpalaSlayer]

http://www.alphasnail.com/thegoat/iSplode.png


:laugh: wtf?

[FordNut]

125 should be ok.

[ImpalaSlayer]

125 should be ok.

wouldnt the IAT be much higher on hotter days>?

[FordNut]

Yes, it will be higher. As long as you relocated the IAT the tune should pull timing and keep the engine safe.

A few options to lower it... Bigger, more efficient heat exchanger; fans on heat exchanger (some claim this actually makes it worse); POSSIBLY the VTS insulation & gaskets (jury is still out on whether it works); POSSIBLY the VTS upgraded intercooler (ditto); twin screw blower that produces less heat; Killer Chiller system which uses freon cooling, taps off of cabin AC system.

[LANDY]

on 80 degree weather i run about 87 to 94 degrees, but then again i have a different set up.

[Spectragod]

Yes, it will be higher. As long as you relocated the IAT the tune should pull timing and keep the engine safe.

A few options to lower it... Bigger, more efficient heat exchanger; fans on heat exchanger (some claim this actually makes it worse); POSSIBLY the VTS insulation & gaskets (jury is still out on whether it works); POSSIBLY the VTS upgraded intercooler (ditto); twin screw blower that produces less heat; Killer Chiller system which uses freon cooling, taps off of cabin AC system.


I looked into the killer chiller system a bit, not 100% sure it would be the ticket to lower the temp, my understanding is that it was only good for short bursts. I have considered a bigger heat exchanger as an alternative.
Don't know, any suggestions?:help:

[ntd]

What size heat exchanger comes with the Trilogy kits? What size are you using on yours Dave? I am using a 26x7x3.5 from frozen boost it's snug but it fits;).

[merc]

for those of you with boost and that monitor you IATs, i was wonder what you guys normally see on the hotter days. the other day it was about 75* out and my iat under normal driving conditions was about 115-125. does that seem about right? what do you feel is the higher side of the safe margin?

That seems a little high to me. I didn't get over 100* all weekend long at normal speed. I got into full boost a couple of times and heat spiked a 120*. At 140* I start taking timing out by 3 degrees on the street tune.

[blazen71]

on 80 degree weather i run about 87 to 94 degrees, but then again i have a different set up.


^^^^^^^^^^^+1^^^^^^^^^^^^^^

[Zack]

My IAT's are always about 40 above ambient.

[ImpalaSlayer]

What size heat exchanger comes with the Trilogy kits? What size are you using on yours Dave? I am using a 26x7x3.5 from frozen boost it's snug but it fits;).

trilogys come wit factory cobra H/e's. that is also what i am running for now

im lookin at the big ass one from FB, both Zacks run it


That seems a little high to me. I didn't get over 100* all weekend long at normal speed. I got into full boost a couple of times and heat spiked a 120*. At 140* I start taking timing out by 3 degrees on the street tune.

got into the boost a few times but took these readings after cruzing a few miles. this is also off my scan gauge so i duno how accurate it really is.


My IAT's are always about 40 above ambient.

ill keep that in mind

[Zack]

IAT's are quite dependent on driving style.
If you drive like an old man they wont go up that much.

Get on it once or twice and they shoot up. (<------Thats what she said :D)

[juno]

Apples to oranges, but.......
Do you still have an exposed air filter like in the pic?
My kit did not have an enclosure so I worked on some designs. I started by putting a plastic piece that blocked it from the engine compartment. (just to avoid sucking air).
Just that piece dropped my temps 25-30 deg F cruising!!!!! (from 110 or so to about ambient)
Kenne Bell 101, don't suck any engine air into your filter. Any exposed filters are a huge no-no!!!

[FordNut]

Apples to oranges, but.......
Do you still have an exposed air filter like in the pic?
My kit did not have an enclosure so I worked on some designs. I started by putting a plastic piece that blocked it from the engine compartment. (just to avoid sucking air).
Just that piece dropped my temps 25-30 deg F cruising!!!!! (from 110 or so to about ambient)
Kenne Bell 101, don't suck any engine air into your filter. Any exposed filters are a huge no-no!!!

CAI vs HAI

[-Matt-]

You could always run some meth?

[ImpalaSlayer]

Apples to oranges, but.......
Do you still have an exposed air filter like in the pic?
My kit did not have an enclosure so I worked on some designs. I started by putting a plastic piece that blocked it from the engine compartment. (just to avoid sucking air).
Just that piece dropped my temps 25-30 deg F cruising!!!!! (from 110 or so to about ambient)
Kenne Bell 101, don't suck any engine air into your filter. Any exposed filters are a huge no-no!!!

never really thought bout that. ill have to work on a heat shield

[Zack]

never really thought bout that. ill have to work on a heat shield

Have fun wasting your money...and time

[ImpalaSlayer]

Have fun wasting your money...and time

no money, i have a ton of aluminum sheet laying around from .028 all the way to .125. and i have tons of time so why the hell not

[Zack]

no money, i have a ton of aluminum sheet laying around from .028 all the way to .125. and i have tons of time so why the hell not

Make sure you cut out the bottom of the original battery tray to make it worthwile.

[ImpalaSlayer]

Make sure you cut out the bottom of the original battery tray to make it worthwile.

there is no tray there, i used my original the first time around when i used the factory battery

[juno]

Have fun wasting your money...and time

If he is sucking hot air it is definitely not a waste of time or money.

[juno]

Here is a Kenne Bell link about Hot Air intake.

http://kennebell.net/techinfo/general-info/HotAirWARNING.pdf

[Zack]

You only suck in hot air when you are at a stop idling for extended lengths of time. As soon as the car starts moving, the underhood temps drop to at or near ambient.

I wont comment anymore until Dave give us some real world data.

[Zack]

If he is sucking hot air it is definitely not a waste of time or money.

We dont have the automotive Heat equivalent of the SUN under our hood like you do. :D

[FordNut]

It would be interesting to see IAT1 readings. Maybe Dave could fix up an extension cable that would plug into the IAT2 cable on one end and the MAF on the other (assuming the MAF is the type with IAT). Then do some comparisons of IAT at the MAF to outside air temperature.

[Joe Walsh]

You only suck in hot air when you are at a stop idling for extended lengths of time.
As soon as the car starts moving, the underhood temps drop to at or near ambient.

I'm not convinced that's true.

The radiator, A/C condenser and transmission cooler all dump hot air directly into the front of the engine compartment.

[FordNut]

And the so-called heat shields some manufacturers sell are ineffective. If radiant heat was the issue, maybe they would help. The issue is heated air from the engine compartment being pulled through the air filter, so the K&N approach of virtually sealing the air filter from the engine compartment makes sense. Notice the contour along the top of the metal shielding is contoured to match the lines of the hood, so even though the top is open with the hood open, it is essentially closed when the hood is closed. The DR box also accomplishes this, just in a different way.

[sailsmen]

10*-25* above ambient depending on traffic/air temp/acceleration. I don't see above 115* on the street or 125* at the track. These IATs are w/o Meth.

Removing the front license plate holder reduced my peak IAT 7*-8* at low speeds.

Removing the front grill reduced summer time coolant temps 20* at low speeds and 10* at high speeds.

Some are putting an additional trans cooler in front of the radiator and a heat exchanger or IC in front of the radiator while increasing HP w/o monitoring the increased coolant temps. The idiot guage does not move until ~240* mark.

Others put driving lights and sirens behind the grill blocking the radiator. some forget why there is a grill there, and it is not to put stuff behind it.;)

They increase the HP while blocking off the radiator and then wonder why they have engine failure.:rolleyes:

[juno]

I'm not convinced that's true.

The radiator, A/C condenser and transmission cooler all dump hot air directly into the front of the engine compartment.

You are correct. All the shrouding around our radiator and fan channel all the hot air drawn through them into the engine compartment.

Like Zack said I happen to have an additonal few feet of exhaust piping in the engine compartment and it adds to my load but every manufacturer shields their air intakes from hot air straight from the factory.

[ImpalaSlayer]

It would be interesting to see IAT1 readings. Maybe Dave could fix up an extension cable that would plug into the IAT2 cable on one end and the MAF on the other (assuming the MAF is the type with IAT). Then do some comparisons of IAT at the MAF to outside air temperature.


sorry, i have a cobra MAF. the best data i can give you is after i add a heatshield is from the IAT2

[Zack]

You can install a push in IAT sensor in the cobra inlet tube, if it isnt already there.

[ImpalaSlayer]

You can install a push in IAT sensor in the cobra inlet tube, if it isnt already there.

i have en extra. how would i go about hooking it up?

[MM_BKK]

i have en extra. how would i go about hooking it up?

You'll need a stand alone gauge for it as the ECM does not have an input for IAT2.

[ImpalaSlayer]

You'll need a stand alone gauge for it as the ECM does not have an input for IAT2.
hmmm ill have to look into this. i wouldnt mind doing some testing.

[ImpalaSlayer]

anyone know if an IAT gauge exists?

[Joe Walsh]

Autometer makes an intake air temperature gauge - #4372;

http://www.summitracing.com/parts/ATM-4372?part=ATM-4372

[ImpalaSlayer]

Autometer makes an intake air temperature gauge - #4372;

http://www.summitracing.com/parts/ATM-4372?part=ATM-4372

holy crap, its like 250 bucks. yeah i think ill just read what IAT2 says

[Joe Walsh]

holy crap, its like 250 bucks. yeah i think ill just read what IAT2 says

You didn't specify that you wanted to check your intake air temps "in an inexpensive fashion"....:P

[ImpalaSlayer]

You didn't specify that you wanted to check your intake air temps "in an inexpensive fashion"....:P

i cant see spending 250 bucks for testing. i wouldnt keep it in the car. plus that one isnt scaled very accurately

[Joe Walsh]

i cant see spending 250 bucks for testing. i wouldnt keep it in the car. plus that one isnt scaled very accurately

It reads all the way up to 400 degrees!...:eek:

It is a 2 channel gauge, so if you had a centrifugal or turbo it would be neat to read the intake air temperatures before and after the intercooler.

[FordNut]

Just disconnect the one at the lower intake manifold and hook it up there for temporary testing use. You can't do simultaneous testing of IAT1 and IAT2, but you can repeat the test with similar environmental and driving conditions after switching the connection.

[ImpalaSlayer]

It reads all the way up to 400 degrees!...:eek:

It is a 2 channel gauge, so if you had a centrifugal or turbo it would be neat to read the intake air temperatures before and after the intercooler.

essentially, thats exactly what im trying to do.

[ImpalaSlayer]

Just disconnect the one at the lower intake manifold and hook it up there for temporary testing use. You can't do simultaneous testing of IAT1 and IAT2, but you can repeat the test with similar environmental and driving conditions after switching the connection.

id have to drive pretty easy wouldnt i? as in no boost?

[Joe Walsh]

essentially, thats exactly what im trying to do.

I forgot that the IAT2 location is below the Eaton's intercooler.

[RR|Suki]

We dont have the automotive Heat equivalent of the SUN under our hood like you do. :D


It would be interesting to see IAT1 readings. Maybe Dave could fix up an extension cable that would plug into the IAT2 cable on one end and the MAF on the other (assuming the MAF is the type with IAT). Then do some comparisons of IAT at the MAF to outside air temperature.

I have a MAF with IAT and the temps are actually usually under the external temp sensor when at speed. When stopped it's certainly hot, but once you move it cools right down

[ImpalaSlayer]

I forgot that the IAT2 location is below the Eaton's intercooler.

yes sir!



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