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Old 08-19-2010, 02:37 PM   #1
6SpeedBlazer
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2003 ZR2 project thread

so i have done a few things so far but nothing to spectacular.

i upgraded the headlights with HIR bulbs
added a drop in air filter
added an AD244 alternator with smaller pulley
i put in a larger radiator due to it getting hot.

now im swapping in a dodge intrepid fan assembly because my clutch fan is damn annoying, and does not keep the truck cool at idle.

so i had some free time today so i got the majority of the worked knocked out.

i have to give HenryJ credit for most of this because i based my install after his. the only difference is that im using different fans.

here is the engine bay with some stuff removed. (ac compressor is moved, fan, shrouds, and skid plate)


after i got all that done i took some measurements and built the lower mounts. i just cut up some aluminum angle stock and pop rivited it to the bottom of the shroud.





here you can see the tabs in the slot below the radiator. my center tab is gone (along with part of the lower shroud. so i decided to just use two tabs.




here is the fan attached to the cut up extra upper shroud i got from rockauto.com





here is the fan/shroud assembly all mounted up. look at that room







here is the fan in place with the compressor loosely back in place.



i decided to mount the fans like this for a few reasons. one i don't like the radiator zip ties. and two i wanted to be able to return to stock in a short am amount of time with little issues.

the fans are not in permanently yet, i sent my tuned pcm back for some updates so i don't currently have any controls for the fans.

since my truck is an 03 with the 6106 red/green pcm it has some awesome fan controls.

low speed comes on a 209*F, high at 219*F and when AC is on and the system pressure reaches 210psi the computer will cycle the high fan speed until pressure drops. this allows the fans to cycle when needed and makes sure they are off once proper airflow across the radiator/condenser is achieved.

if anyone has any questions or comments let me know.
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Old 08-19-2010, 02:56 PM   #2
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Im digging the pop riveted aluminum to mount it. Ive been trying to find a good way to mount my dual fans that looked nice and worked better than some zip ties
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Old 08-19-2010, 03:08 PM   #3
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Originally Posted by v8blaze View Post
Im digging the pop riveted aluminum to mount it. Ive been trying to find a good way to mount my dual fans that looked nice and worked better than some zip ties
it loos like it will work great, plus i can go back to stock super easy.
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Old 08-20-2010, 12:59 AM   #4
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very nice!
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Old 08-20-2010, 06:54 AM   #5
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very nice!
THANKS!

my pcm should be back next week so i will try and get a final install next weekend!
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Old 08-29-2010, 08:42 PM   #6
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Well how did it go?
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Old 08-30-2010, 07:47 AM   #7
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Well how did it go?
everything is installed and working good.
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Old 08-30-2010, 02:19 PM   #8
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so im pretty happy with this mod.

with the pcm tune and e-fans i picked up a noticeable amount of off the line torque.

The best part is starting the truck and not hearing the annoying fan roar for the first few minutes.

i still need to install my pulleys. hopefully that will add a bit more to what i already gained.
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Old 08-30-2010, 07:41 PM   #9
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That's cool! I'm just about to do the same with some LS1 fans. I have the older PCM though. So I only have setting for one speed.

Is the PCM controlling when it comes on with A/C too? I was looking at stock tune for the 01+ PCM and never seen setting where you could set the fan to come on with a/c.

I'm going to mount my fan the same way you did yours. I still need to make the lower tabs and get an extra upper shroud. When I first check rockauto I couldn't find one. Then I seen this thread and looked harder. Now I got one one the way.
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Old 08-30-2010, 07:49 PM   #10
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Originally Posted by 12sws27 View Post
That's cool! I'm just about to do the same with some LS1 fans. I have the older PCM though. So I only have setting for one speed.

Is the PCM controlling when it comes on with A/C too? I was looking at stock tune for the 01+ PCM and never seen setting where you could set the fan to come on with a/c.

I'm going to mount my fan the same way you did yours. I still need to make the lower tabs and get an extra upper shroud. When I first check rockauto I couldn't find one. Then I seen this thread and looked harder. Now I got one one the way.
i should have updated this part.

i molded my wiring off a full size silverado with a 4.3L and e-fans.

all fine an dandy. same motor same pcm i thought it would all work out. well when gm switched the s10's over to the blue/green pcm they didn't rewire the AC. so the pcm does not "see" ac head pressure. so the fans do NOT cycle with AC pressure. BIG bummer.

i had to run a single wire from high speed control to the AC circuit. so now the fans are on high whenever the AC comes one.

i am trying to find a way to add a second high pressure switch to the high pressure port then running that back to the pcm. its only 3 wires and only 2 go to the pcm. 5v reference, ground and signal.

if i can get the pcm to "see" ac head pressure then the computer can cycle the fans on low or high depending on the pressure that is seen.
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