More Eaton Swap Questions... blarg...

[Commodore Crap]

Ok, so.
1. I have the stock Cobra throttle cable and bracket. Can I just use that, or is it just easier to mod the existing bracket?

2. I have the stock Cobra MAP (IAT2) Sensor. Now, can someone help me make sense of this?

From MM > To Cobra
MAF P1 Gy/Rd > MAP/BAP/IAT2 P4 Gy/Rd Signal Return
MAF P6 Gy > MAP/BAP/IAT2 P3 DB/LG MAF Signal
EGR P2 Bn/Wh > MAP/BAP/IAT2 P2 Bn/Wh Reference Voltage
EGR P3 LB/Rd > MAP/BAP/IAT2 P1 Rd/Ye MAP Sensor Signal

This is on page #20, post #294 of the Eaton Swap part list thread. They recommend using the MAF P6 to P3 and the EGR P3 to P1. Has anyone tried this yet and is it correct? Thanks.

-ryan s.

[ImpalaSlayer]

1. you do not use the cobra cable you use mm cable. you do use the bracket for it though.

2, as i said, me no helpy

[RacerX]

The two outside wies get cut and extended to the IAT sensor. Doesn't matter which outside wire goes to which side of IAT input. Here's the pinout for the connector:
http://www.mercurymarauder.net/gallery/data/579/Diablo_connectorpin_204.jpg

[ImpalaSlayer]

The two outside wies get cut and extended to the IAT sensor. Doesn't matter which outside wire goes to which side of IAT input. Here's the pinout for the connector:
http://www.mercurymarauder.net/gallery/data/579/Diablo_connectorpin_204.jpg


he needs to know the other end, to the cobra iat2 sensor. this end is easy.

[RacerX]

How can the "outside 2 gray wires" be hard? :P

[ImpalaSlayer]

How can the "outside 2 gray wires" be hard? :P

i dont think you are following, he wants the pin out for the cobra iat2 sensor which i think has 3 or 4 wires, not sure....

one second thought i might be the one confused and thinking of something else. now im lost lol

[RacerX]

Maybe I'm thinking wrong... This is what he's wiring then:
http://img245.imageshack.us/img245/6803/dsc06026.jpg
http://img27.imageshack.us/img27/2939/dsc06027o.jpg

[ImpalaSlayer]

thats the one. does it have 2 or 3 wires? i dont remember. i think im thinking of something to do with the egr

[RacerX]

I'm running it with a 90mm LMAF so it gets relocated to the back of the Eaton with the drill and tap as you posted somewhere. Sensor isn't in there like the 80mm maf. Hmmmm... I thought if you kept the 80mm, you cut the wires to the IAT built into the 80mm and install to the sc anyway... (IAT not IAT2 on mine)
http://www.autopartstomorrow.com/images/thumbs_v2/MTR/DY754.jpg

[RacerX]

(Credit goes to 01_Venom) http://www.extremehp.com/modules.php?name=Forums&file=viewtopic&t=1390

Sure, here is the pinout on the 03 Cobra TMAP:

http://www.allhardwood.net/images/03_cobra_iat2.jpg

Use IAT2 and SIG Return and wire them to your original sensor leads.

http://www.allhardwood.net/images/old_style_iat.jpg

If you need a TMAP pigtail, part no: 3U2Z-14S411-SSA

[ImpalaSlayer]

I'm running it with a 90mm LMAF so it gets relocated to the back of the Eaton with the drill and tap as you posted somewhere. Sensor isn't in there like the 80mm maf. Hmmmm... I thought if you kept the 80mm, you cut the wires to the IAT built into the 80mm and install to the sc anyway... (IAT not IAT2 on mine)
http://www.autopartstomorrow.com/images/thumbs_v2/MTR/DY754.jpg

you would if you were dumb enough to keep the 80mm. your gona def need a mafia if you do that.

if you dont relocate the IAT to a post boost location you fail.

[RacerX]

you would if you were dumb enough to keep the 80mm. your gona def need a mafia if you do that.

if you dont relocate the IAT to a post boost location you fail.
Well duh! :rolleyes: So really, you can use either IAT or IAT2. Nothing like advancing the timing telling the pcm you have 80 deg air coming in when it's really 160!!! ;) BOOOOOM!!! That was a nice "Duh!" btw!
Here: this is what I remember! http://www.mercurymarauder.net/forums/showthread.php?t=32655&highlight=scared
Courtesy of Zack:
Im scared to post this: IAT Relocation Pics
Start with a drill bit this size:
http://www.mercurymarauder.net/showcase/files/4/0/4/ToBeFiled003.jpg
This bit cost me about $35 bucks, the most expensive component of the project.

Drill hole here:
http://www.mercurymarauder.net/showcase/files/4/0/4/ToBeFiled002.jpg

Use a 3/8-18 NPT Tap:
http://www.mercurymarauder.net/showcase/files/4/0/4/ToBeFiled004.jpg

Install sensor part # DY-754 and corresponding pigtail part # WPT-322, both Motorcraft #'s. Note: install the sensor AFTER the lower manifold is in place on the engine, because the sensor will not clear the relocated coolant tube.
http://www.mercurymarauder.net/showcase/files/4/0/4/ToBeFiled005.jpg

Inside view:
http://www.mercurymarauder.net/showcase/files/4/0/4/ToBeFiled006.jpg

Installed in the car:
http://www.mercurymarauder.net/showcase/files/4/0/4/ToBeFiled010.jpg

To hook up the sensor, simply cut the 2 outermost wires on the MAF harness and hook them up to the 2 wires in the pigtail. Orientation of the wires does not matter.

[ImpalaSlayer]

Well duh! :rolleyes: So really, you can use either IAT or IAT2. Nothing like advancing the timing telling the pcm you have 80 deg air coming in when it's really 160!!! ;) BOOOOOM!!!

the "IAT2" is just the cobras second sensor it would be "IAT1" on an eaton swap in an mm as the pcm has no provisions for a second iat reading

[RacerX]

Edzachary! :D Just curious why one would choose IAT2 and that pigtail over IAT1 and that one. I must be missing something here. (If going to 90mm maf). Is one easier to install over the other? No drilling for IAT2?

[ImpalaSlayer]

Edzachary! :D Just curious why one would choose IAT2 and that pigtail over IAT1 and that one. I must be missing something here. (If going to 90mm maf). Is one easier to install over the other? No drilling for IAT2?
now you lost me but this is what i think your asking

with the cobra sensor there is no drilling or tapping.i only did it the way i did because i already had the stuff. Zack also did it this way back in the day when the trilogys read pre boost iat (:shake: ). if i were to do it again id probably use the cobra iat. i did it my way on Rexs car as well.

[RacerX]

Ahhhhh!!! Thank you for clearing that up! I thought there were two ways listed! I have a 90mm LMAF and already have an extended IAT1 installed (waiting for the Eaton). So obviously for me, I'm doing it your way. This part is more clear now (That it's two ways: IAT1 or IAT2):
IAT sensor; DY-754 /pigtail; WPT-322 or use the Cobra sensor, just get the pigtail #3u2z-14s411-ssa (note, if the blower didn't come with the Cobra sensor you need to get one to plug off the hole anyway.

[ImpalaSlayer]

Ahhhhh!!! Thank you for clearing that up! I thought there were two ways listed! I have a 90mm LMAF and already have an extended IAT1 installed (waiting for the Eaton). So obviously for me, I'm doing it your way. This part is more clear now (That it's two ways: IAT1 or IAT2):
IAT sensor; DY-754 /pigtail; WPT-322 or use the Cobra sensor, just get the pigtail #3u2z-14s411-ssa (note, if the blower didn't come with the Cobra sensor you need to get one to plug off the hole anyway.


just make a little plate to cover the hole, thats what i do, looks cleaner then an empty pigtail and if you have a cobra sensor use it anyway lol

be sure to seal the plate though

[RacerX]

Sooooo... Absolutely nothing I posted helped the op? :D BLAAAARRRGGG!!!!! Someone will find the pretty pics useful some day! :beer:

[Commodore Crap]

Everything helped. The stock Cobra IAT2 has 4 pins. I just wanted to use the original mounting point for the IAT2. Plus I have one sitting right here. I have an SCT BA2400 MAF which is definitely enough for this application (for now). Thats all the info/pics I needed.
The stock IAT2 location is adequate for the PCM, correct? Or will I get a better reading mounting it where you (or the pic) did?
Thanks for the clarification guys. I believe beers are in order at MMIX.

-ryan s.

[RacerX]

It appears the IAT2 sensor does have polarity and needs to be wired correctly or the reading will be backwards:
http://www.mercurymarauder.net/forums/showthread.php?t=65077
As far as location, as long as either are on the pressure side, you'll get more accurate readings than any temp reading pre blower compression.

[Commodore Crap]

So according to that, MM P6 goes to Cobra P3, and MM P3 goes to Cobra P1?
Or am I just tarded?

-ryan s.

[ImpalaSlayer]

i knew there was something about the cobra sensor that made it a little more difficult to install

[burt ragio]

So what is the square root of IAT 1 over IAT 2 ?

[SC Cheesehead]

Over 9,000

[ImpalaSlayer]

Over 9,000

yes........