LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

L98 to 6.0l LQ9 Swap 89 Iroc

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Old 11-24-2013, 06:44 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

Well I ordered 1 5/8 headers and ended up with this.



these headers fit perfect.... http://www.racinginnovationandsupply...der_p_189.html




And this is slowing any progress down.

Old 11-24-2013, 07:59 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

I bet the inside dia. is 1 5/8. Dont worry about them not being big enough for n/a. Im still using factory fbody manifolds on my 6.0 cammed with ls6 intake and got 370hp/380tq at the wheels.When I put the longtubes on and a 3 inch y pip with cutouts should be me over 400whp with a retune.
Old 12-19-2013, 01:29 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

Well I got some work done on the car.


Dropped the tank and swapped in a Walbro 255 pump, holy crap is that tank not fun to remove or install.

Working on swapping in the PAC valve springs with my homemade spring compressor.


And Finally went to the local pick and pull and snagged a tail shaft with accommodations for the torque arm.

Old 12-19-2013, 02:50 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

Why did you have to swap out the tail shaft?
Old 12-19-2013, 02:57 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

Originally Posted by Chevy86 IROC-Z
Why did you have to swap out the tail shaft?
Transmission was out of a truck with no provisions for torque arm. I am using the factory tq arm.
Old 12-19-2013, 04:19 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

Originally Posted by jtaliaferro
Transmission was out of a truck with no provisions for torque arm. I am using the factory tq arm.
Old 12-22-2013, 12:23 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

Well all valve springs have been installed along with rocker arms and valve covers.



TQ arm and drive shaft have been installed.

Old 12-22-2013, 12:29 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

Now I have to figure out why the shifting linkage from the 700r4 is not fitting onto the 4l60e. Seems the stud on the 4l60e transmission is to larger to accommodate the linkage from the 700r4.


Never mind I just needed a bigger hammer.

Last edited by jtaliaferro; 12-22-2013 at 02:08 PM.
Old 12-23-2013, 10:30 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

I decided to use Vbands on my exhaust collectors.


Used some 304 filler and my scratch start tig.

Old 12-29-2013, 02:05 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

First start, I still have to finish wiring and ETC.

Last edited by jtaliaferro; 12-29-2013 at 02:09 PM.
Old 01-05-2014, 09:23 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

Check here for that linkage: http://www.shiftworks.com/4lx.htm
Do you have the longer stud?
Old 03-09-2014, 03:02 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

Idel clip of the TSP 224r


Last edited by jtaliaferro; 03-09-2014 at 03:06 PM.
Old 03-09-2014, 05:24 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

Very nice.. Thats my winter project next year
Old 03-09-2014, 05:47 PM
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Car: 1989 IROC-Z28
Engine: L98 - 350 TPI
Transmission: MD8 - 700R4
Axle/Gears: GH3/G80 - 2.77 POSI
Originally Posted by LastGTA
Nice work. When life happened I sold my 2007 C6 last Spring and picked up my 92 T/A that I'm swapping. From: To:
Hey Dan!
Old 03-09-2014, 11:18 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

That 224r sounds more aggressive than my 228r lol
Old 03-26-2015, 09:19 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

It's been awhile I thought I would update a few things.

Due to ground clearance issues I had to cut up the hawks trans cross member, I am in the process of completing this

once its complete I will snap a few pics if someone is interested.

Car is running pretty well even though I have not drove it all that much. I know after my 1986 lsx turbo z28 this thing is a major dog... LOL
Old 03-27-2015, 08:21 AM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

Originally Posted by jtaliaferro
Idel clip of the TSP 224r

http://youtu.be/_ZjcTUHF9Ck
Sounds healthy
Old 03-27-2015, 11:09 AM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

Originally Posted by IROCgiraffe
Sounds healthy
Thanks....


Here is a short clip of the turbo ls swapped z28.

Old 03-28-2015, 08:56 AM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

You must be using 2.5" intermediaries, right? 3" is tough to get around the 4L65e - I know.
From your trans cross-member, it looks like you're going to attach through the side of the rail, correct? I used cylinder collars that go all the way through, then welded on both external sides with the bolts going through them. I also had to scallop the rail a little, but it gave me the clearance needed.
The transbracket pic looks like the one bolt is not tightened flush (it is), the collar protrudes and has weld underneath. The bracket is snug.
Attached Thumbnails L98 to 6.0l LQ9 Swap 89 Iroc-transbracket.jpg   L98 to 6.0l LQ9 Swap 89 Iroc-scallop.jpg   L98 to 6.0l LQ9 Swap 89 Iroc-exfitment.jpg  
Old 03-28-2015, 02:57 PM
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Re: L98 to 6.0l LQ9 Swap 89 Iroc

I made 3" fit, but d*** if its not tight. Burnt 2 shifter cables before putting heat sleeve over the cable.
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