crvtectim

Are any of you Chads running these before your throttle body? I'm looking to relocate my IAT from the intake runner to the cold side piping so just looking for some feedback from you guys. Discuss.

BoostedEgHatchFl

iTrader: (2)

Thats what Im going to do when I build my new cold side pipe. Tampa Mike just told me it needs to be tuned that way.

Turbo-LS

iTrader: (4)

Mine is in the charge pipe 6 inches from the throttlebody. It gives an accurate intake air temp reading instead of a heatsoak reading LOL

tron_

Yes, I am running my IAT on the cold side piping just before the throttle body. If you want to run the Civic oem IAT sensor you can get this flange from Xenocron. I just had it welded to my piping:

http://www.xenocron.com/iat-flange-x...nge-p-462.html

IIRC you can also run a CRV IAT sensor. Some people do this because the CRV sensor is threaded so you do not have to buy the adapter flange above. Not sure if the connector is the same as the one on the Civic harness so you might need the pigtail if you go this route.

crvtectim

That xenocron flange is nice. So did you guys bother with peeling the plastic away from the sensor? From what I've read so far, the OEM sensor's response time is pretty sluggish. Cutting the plastic casing around it with a razor was shown to dramatically improve its response time to better the GM/Delco and T1 sensor's time.

EsotericImage

iTrader: (8)

I keep mine in the intake runner which shows the actual temp of the air entering the cylinder.

crvtectim

But haven't you wondered about all the heat transfer from the head? Or why Honda started placing them in the intake tubes on the S2K and RSX instead of runner 3 or 4?

BoostedEgHatchFl

iTrader: (2)

Dont forget all the OBD2 civics had then in the intake pipe too

Turbo-LS

iTrader: (4)

It doesnt tell you the temp of the actual air entering the head. the sensor it self heatsoaks and gives false readings. just because the material of the manifold is 180degrees doesnt mean the air is. it doesnt spend much time in the intake manifold to heat that quickly from the less than 100 degrees it is when in the charge pipes.

crvtectim

Right, and I'm also seeing that it carries a hefty influence on your tune between the ambient temps in summer and winter. I'm going for it!

Did you guys have to tune your cars all over again after transplanting the IAT to your charge piping? Or did your tuning software do a good job extrapolating the differences?

tron_

I put mine before the throttle body initially so I can't say 100% if you need a retune or not. I think that is a judgement call you'd have to make based on the difference in IAT temps you see from having the sensor in the intake manifold runner versus in the new location on the charge piping.

silverstreek81

so what are you all doing to block off the hole on the IM? just making a custom block off plate? didn't see a block off included with the xenocron kit.

tron_

^Yup, just need to make a block off plate and screw it on

4cylfiend

iTrader: (1)

I should have done the with my build this year. Definitely something I overlooked.

LightningTeg

Your fine .

4cylfiend

iTrader: (1)

Hi Chris!

crvtectim

I'll def keep a close eye on my A/F gauge after the mod.

0xenocron

This was a mistake on Honda's part...it is documented.

The engineers who did this part should have been fired.

The engineers would did the ECU and tuning had to create THREE tables for IAT compensation to account for the ability of the ECU to cope with a heat soaked IAT sensor.

crvtectim

Wow, good info. I'm surprised we don't see more IAT sensor failures in the IM. I've owned a lot of Hondas and have never seen one go bad.

xenocron, does this mean that since my neptune is ecu based, it also has 3 tables for compensation? If so, do you think I'll need another tune after moving the IAT?

BoostedEgHatchFl

iTrader: (2)

I just pick my car up from Tampa Mike. Tune is by far not done. Ran into other issues with the car. But it seems to run great just cruising around. Ill report back after I swap mine over and yall do the same.

SwappedTURBOegg

why would you move it especially on a turbo car? if anything youre hurting your self. the honda sensor is slow anyways,even for data collection this is pointless.leave it in the intake its always worked and will continue to do so.

crvtectim

Nice, man! Was this with the new housing?

Yes, the sensor is slow. That's why I was asking if anybody was running a modified sensor. (faster response time and more accurate)

And if you notice on the newer Hondas, the sensor has been moved to the intake plumbing.

The point is to get as close to true ambient temp readings year round for the best tune year round. Here on the panhandle, it gets hot as ***** in the Summer months and dips down to below freezing quite a few times in the Winter months.

I doubt I'd sweat it if my car were N/A, but with the added heat soak of a turbo system stuffed in the bay of a CRX with a B20VTEC swap and temp changes happening so fast during pulls, I'd like to give neptune an edge on my IAT readings.

So is everybody just stuffing their OEM sensors in the charge pipe or is anyone bothering to modify them beforehand?

wantboost

iTrader: (2)

you can't really modify a honda sensor... you'd need an exposed temp element like the gm iat sensor... you could maybe cut a stock iat sensor open and take a look to see if you could make it exposed junction

Dynasty21

Has anyone done a before (stock location) and after (relocated to intake) comparison and has proof the intake location is better for FI?

wantboost

iTrader: (2)

grab the intake manifold after a drive... then grab the cold pipe... tell me which one is colder, the intake manifold heat soaks, which means the sensor bolted to it will heatsoak as well considering its housed completely in abs plastic