My 1989 IROC LS1/4L60E swap

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Feb 13, 2013 | 03:22 PM
  #151  
Re: My 1989 IROC LS1/4L60E swap
Nice project. keep it up.
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Feb 13, 2013 | 03:51 PM
  #152  
Re: My 1989 IROC LS1/4L60E swap
Quote: I cheated - put truck coils on the passenger side. They mount up higher (closer to the middle of the engine) than f-body coils.

Oh, on the transmission dipstick - when I started my install, I couldn't find the dipstick, either. It was lost in the bowels of the storage unit. Further foraging located it, but not until after I had stabbed the engine/trans. Getting it in with them already installed was a challenge.

(Now if I could find those LS3 rockers and rocker stands in the storage unit...)

LOL! Wish you luck finding those in the bowels of your storage unit! LOL!

I stole my bosses truck coils off his 5.3 and it would not fit either??? With or with out truck braket still no room? Will post a pic.
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Feb 13, 2013 | 03:56 PM
  #153  
Re: My 1989 IROC LS1/4L60E swap
This is with the truck coils and braket.

NO BUENO!

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Feb 13, 2013 | 03:57 PM
  #154  
Re: My 1989 IROC LS1/4L60E swap
Quote: Nice project. keep it up.
THANKS! Yours turned out SWEET!
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Feb 13, 2013 | 08:52 PM
  #155  
Re: My 1989 IROC LS1/4L60E swap
Can you somehow flip the coil or turn it on its side and use a longer wire? Just a thought.Or If you have a drill press fab a bracket that would relocate the coil using recessed screws from the bottom.
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Feb 13, 2013 | 09:25 PM
  #156  
Re: My 1989 IROC LS1/4L60E swap
Quote: Can you somehow flip the coil or turn it on its side and use a longer wire? Just a thought.Or If you have a drill press fab a bracket that would relocate the coil using recessed screws from the bottom.
I could glue it to the windsheild if I really wanted to! LOL! If I can have them uniform I would rather have it done that way.
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Feb 13, 2013 | 10:33 PM
  #157  
Re: My 1989 IROC LS1/4L60E swap
Yours will too.
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Feb 14, 2013 | 12:03 AM
  #158  
Okay, there is more than one kind of truck coil.

I probably have a better pic somewhere, but this is the best I could find right now.

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What mounts are you using?


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Feb 14, 2013 | 08:38 AM
  #159  
Re: My 1989 IROC LS1/4L60E swap
There must be cause those coils sit much higher than the ones I have seen. I am using the stock mounts with poly inserts and the brakets are from Hawks.

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Feb 14, 2013 | 11:13 AM
  #160  
Re: My 1989 IROC LS1/4L60E swap
Quote: This is with the truck coils and braket.

NO BUENO!

I tried to grind down my AC box to fit the F-body coils and couldn't get them to fit no matter what. I ground the box down as far as I thought possible and still no luck. In your picture I ground the whole tab off until it was flush with the AC box. I ended up buying a set of the D585 truck coils with the heat sink on them. On the passenger side in the back, even with the AC box ground off and with the truck coils my wire still rubs. Not enough to cause an issue but it does touch. Maybe try the D585 coils, grind the box down or if it like mine I had to do both.
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Feb 16, 2013 | 08:39 AM
  #161  
Re: My 1989 IROC LS1/4L60E swap
Any Idea what the D585 coils came on?
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Feb 16, 2013 | 09:57 AM
  #162  
Re: My 1989 IROC LS1/4L60E swap
In order to get that coil to fit using the stock truck bracket you'll need to grind the bracket a bit in order to tilt the coil (essentially enlarging the hole the coil sits in). Re-drill and tap new bolt holes.

This is what I did for a short term fix while I made custom brackets. I'll see if I can dig up some pictures and post a bit later.
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Feb 17, 2013 | 09:14 AM
  #163  
Re: My 1989 IROC LS1/4L60E swap
Cool, please do. The more I thought about it the more I thought I just needed to modify the bracket for #8 coil. Keep costs down as I still need to pay for exhaust and such. Spent 10 hours yesterday soldering wires and still have more than half still left to do. UGH! I think I have solder smoke poisoning! Lol!
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Feb 27, 2013 | 03:25 PM
  #164  
Re: My 1989 IROC LS1/4L60E swap
OK, will get back to the coil thing later. For now, How in the heck did yall mount the PCM under the dash? It is OOBER BIGGER! Are we lust Zip-tiying it to the factory bracket and cramming it in there??

Almost done!
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Feb 27, 2013 | 03:50 PM
  #165  
Re: My 1989 IROC LS1/4L60E swap
Quote: OK, will get back to the coil thing later. For now, How in the heck did yall mount the PCM under the dash? It is OOBER BIGGER! Are we lust Zip-tiying it to the factory bracket and cramming it in there??

Almost done!
I cut up my stock PCM mount. Or you can easily fab one up.
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Feb 27, 2013 | 04:28 PM
  #166  
Re: My 1989 IROC LS1/4L60E swap
I cut up a older TPI PCM mount, flipped it backwards and used a roll of Velcro to he the PCM to the TPI computer bracket. Fabbed a small bracket that bolted to the bottom of the TPI bracket, and screwed to the bottom of the dash using existing holes to keep it held up.
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Feb 27, 2013 | 05:30 PM
  #167  
Re: My 1989 IROC LS1/4L60E swap
Mine's in the passenger footwell. Would not fit anywhere else when attached.
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Feb 27, 2013 | 05:59 PM
  #168  
Re: My 1989 IROC LS1/4L60E swap
Quote: I cut up a older TPI PCM mount, flipped it backwards and used a roll of Velcro to he the PCM to the TPI computer bracket. Fabbed a small bracket that bolted to the bottom of the TPI bracket, and screwed to the bottom of the dash using existing holes to keep it held up.
Just so I have a better idea. Whitch way are your wires pointing? Up, Down, to the driver, to the passenger?
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Feb 27, 2013 | 06:03 PM
  #169  
Re: My 1989 IROC LS1/4L60E swap
Plugs on PCM face passenger side. Can take pics....
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Feb 27, 2013 | 08:54 PM
  #170  
Re: My 1989 IROC LS1/4L60E swap
jazzdadss -

What cold air intake system did you use or did you fabricate it?
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Feb 28, 2013 | 08:40 AM
  #171  
Re: My 1989 IROC LS1/4L60E swap
Quote: Plugs on PCM face passenger side. Can take pics....
If you still have my # you can send them to my phone Thanks!
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Feb 28, 2013 | 08:43 AM
  #172  
Re: My 1989 IROC LS1/4L60E swap
Quote: jazzdadss -

What cold air intake system did you use or did you fabricate it?
I purchased the 4" conversion system from hawks but found it needed to be modded and I needed more pieces to complete it to my liking. Still wish I would have done a 3.5" system. Would have been more room and I figure it doesnt need to be bigger than the MAF anyway....
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Feb 28, 2013 | 11:58 AM
  #173  
Re: My 1989 IROC LS1/4L60E swap
Will post pics tonight on here, or send them to your phone.
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Feb 28, 2013 | 03:22 PM
  #174  
Re: My 1989 IROC LS1/4L60E swap
jazzdadss-
Thanks for the reply. I really like the clean look your system had in the pictures and my MAF measures 4" at the mouth where the intake tube attaches. As a note, I am running a 5 pin MAF from a truck 6 liter Vortec and would like to end up with something very close to what I see in your pictures.
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Mar 15, 2013 | 05:11 PM
  #175  
Re: My 1989 IROC LS1/4L60E swap
Got my wiring straightened out and loomed up. got to move it today down the street and up on our drive on rack so i could adjust the pan-hard bar. This is for sure a different Animal!! Loud as hell! Exhaust next and then the tune.............
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Mar 15, 2013 | 08:34 PM
  #176  
Re: My 1989 IROC LS1/4L60E swap
What are your plans for exhaust?
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Mar 16, 2013 | 04:40 PM
  #177  
Re: My 1989 IROC LS1/4L60E swap
For now it's just best to keep it simple, Stockish. 2.5 to 3 then back to 2.5. Later when I step up the intake, Throttle body and MAF I think it will be worth it to do a dual 2.5 or may be a single 3.5???
I'm sure it will be choking it a bit but must get this thing running and legal!
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Mar 19, 2013 | 07:52 PM
  #178  
Re: Harness Progress??
hey if u dont mind me asking how much was the whole build
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Mar 20, 2013 | 10:19 AM
  #179  
Re: Harness Progress??
Quote: hey if u dont mind me asking how much was the whole build
Good question. I lost track a while back!!
Doner car - 1500
Motor rebuild - 5500
Trans rebuild - 2000
drive shaft - 430
rear control arms and panhard and relocate - 275
torque arm - 250
rear end - 500
hoses, coolant, oils, filters - 150
CAI - 240
Tune - 375
I'm sure I am forgetting stuff.

I sold my truck to fund this project and it seems I should have sold my wife's vehicle also

It's all good, Like I told my wife, when I am done, even if I have 20K wrapped up in it I would pay double for this kind of performance with anything I could just go buy. Plus, I love Third gens!
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Mar 21, 2013 | 10:38 AM
  #180  
Re: My 1989 IROC LS1/4L60E swap
I do have a question about one more wire. the MIL check engine light wire. anyone know what wire on the 89 to hook it to?
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Mar 23, 2013 | 08:09 AM
  #181  
Re: My 1989 IROC LS1/4L60E swap
Has anyone hooked up their check engine light?
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Mar 23, 2013 | 10:07 AM
  #182  
Re: My 1989 IROC LS1/4L60E swap
R37 from the 98 ls1 PCM to "C" on the C207(brown/white) for the 89.
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Mar 23, 2013 | 01:44 PM
  #183  
Re: My 1989 IROC LS1/4L60E swap
Quote: R37 from the 98 ls1 PCM to "C" on the C207(brown/white) for the 89.

Thanks a million!!
Exhaust coming next week.
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Mar 25, 2013 | 09:30 PM
  #184  
Re: My 1989 IROC LS1/4L60E swap
Looking good!!!
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Mar 31, 2013 | 08:42 AM
  #185  
Re: My 1989 IROC LS1/4L60E swap
Exhaust









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Mar 31, 2013 | 08:55 AM
  #186  
Re: My 1989 IROC LS1/4L60E swap
Tune-time!
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Mar 31, 2013 | 05:55 PM
  #187  
Re: My 1989 IROC LS1/4L60E swap
Looking good
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Apr 1, 2013 | 11:13 AM
  #188  
Re: My 1989 IROC LS1/4L60E swap
Well I wish I could say it's tune time!! I have to replace the three "Lap Banding Clamps" I guess with standard band clamps. Bought the Summit brand clamps and all three are leaking. So as soon as I can stop it from leaking We will go set up a time for tune. Right now just waiting for an open rack to get those clamps swapped out......................................
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Apr 2, 2013 | 04:20 PM
  #189  
Re: My 1989 IROC LS1/4L60E swap
Damn.... wish i would've gone with the double hump crossmember.... Exhaust looks good!!
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Apr 5, 2013 | 11:01 AM
  #190  
Re: My 1989 IROC LS1/4L60E swap
Well, word to the wise. Do not find a cheap place to do your exhaust. Wish I had the stuff to do it myself. The whole exhaust is trash! They said it was my clamps but after getting it on a rack and taking it apart it is screwed to say the least. Starting over with a different shop.... At least this shop is giving me a refund.
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Apr 5, 2013 | 01:35 PM
  #191  
Re: My 1989 IROC LS1/4L60E swap
Buy DIY pieces from jegs or summit. It's not cheap or easy or fast even, but you'll get EXACTLY what you want
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Apr 5, 2013 | 03:18 PM
  #192  
Re: My 1989 IROC LS1/4L60E swap
Quote: Buy DIY pieces from jegs or summit. It's not cheap or easy or fast even, but you'll get EXACTLY what you want

If I already had a chop saw and a welder you can bet I would do it myself!
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Apr 14, 2013 | 08:51 AM
  #193  
Re: My 1989 IROC LS1/4L60E swap
Patiently waiting, Should have the Iroc back in the morning. I hope I am happy with it and there are no leaks! My tuner is gonna squeeze me in as long as there are no leaks....... Saying a prayer!
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Apr 16, 2013 | 01:11 PM
  #194  
Re: My 1989 IROC LS1/4L60E swap
Small update, Got the car back and man what a difference!!! Looks great, sounds great!!! One small problem. put it in park and watched the car start to roll away!!!! Was able to catch it and stop it! Found out that the clip that holds the shifter cable in place at the shifter is missing. Funny, I never messed with it??? Any way, anyone know where to source one of these clips?? again , it holds the shifter cable in place at the shifter bracket inside the car. Thanks!!
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Apr 17, 2013 | 01:46 PM
  #195  
Re: My 1989 IROC LS1/4L60E swap

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Apr 17, 2013 | 02:23 PM
  #196  
Re: My 1989 IROC LS1/4L60E swap
Have to, have to love the LS... the motor our cars were waiting for.... sounds great... ENJOY!
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Apr 17, 2013 | 02:41 PM
  #197  
Re: My 1989 IROC LS1/4L60E swap
Thank you Sir! Now, If I can only find this shifter cable retainer...................................................................................................................
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Apr 17, 2013 | 02:47 PM
  #198  
Re: My 1989 IROC LS1/4L60E swap
Try Florida Auto Fasteners on Ebay or Altha Fasteners on the net, same place. They have all sorts of odd car bits. Maybe what you need. Also, Hawks has gotten into stocking odd parts... maybe them.
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Apr 17, 2013 | 03:59 PM
  #199  
Re: My 1989 IROC LS1/4L60E swap
Exhaust - Round 2












I like this set up much better! Mainly cause it dont leak! YAY!
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Apr 17, 2013 | 08:56 PM
  #200  
Re: My 1989 IROC LS1/4L60E swap
Bout time to start ripping the streets apart
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