1989 5.3/t56 swap underway
Senior Member
iTrader: (5)
Joined: Dec 2008
Posts: 719
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From: Alabama
Car: 1986 camaro
Engine: ls2
Transmission: FLT stage 6 60e
Axle/Gears: 8.8 with 3.73's
Re: 1989 5.3/t56 swap underway
1nasty86: intake on yet dude?
dynodan: naw man ive been getting ready for the wedding...
1nasty86: dude! wedding can wait! intake takes 1-4 hours to put on.......
dynodan:.........................................................
dynodan: naw man ive been getting ready for the wedding...
1nasty86: dude! wedding can wait! intake takes 1-4 hours to put on.......
dynodan:.........................................................
Thread Starter
Joined: Sep 2007
Posts: 533
Likes: 0
From: Crestview, FL.
Car: 1989 IROC-Z, 1979 Malibu Classic
Engine: LSx 5.3
Transmission: MN12 6-speed, 4L60E
Axle/Gears: 4th gen 3.42
Re: 1989 5.3/t56 swap underway
LOL I'd love to put it on but I want to wait till I throw the cam in to get it all tuned at once. Plus I need to spend another $300 for a 90mm throttle body, good news though, I took a second job at Advance Auto Parts just for some extra play money!
Senior Member
iTrader: (8)
Joined: Mar 2008
Posts: 655
Likes: 2
From: NH
Car: 1967 Firebird P.T.
Engine: LS3 4" Strkr 422ci
Transmission: MN12 6 speed
Axle/Gears: 3.73 8.5" 10 Bolt Eaton
Re: 1989 5.3/t56 swap underway
Dan thanks for the help with the MN12, you said exactly what Jeremy@TDPtransmissions told me, so i guess im good to go just need to find an F-body Shifter cup.. i remember seeing a website that had it for $35, do you know where i can find one? (cant seem to find that site again lol)
On Probation
iTrader: (9)
Joined: Feb 2005
Posts: 2,042
Likes: 2
From: So Cal
Car: 87 IROC-Z
Engine: LsX
Transmission: MN12 6speed
Axle/Gears: 3:42
Re: 1989 5.3/t56 swap underway
Dan thanks for the help with the MN12, you said exactly what Jeremy@TDPtransmissions told me, so i guess im good to go just need to find an F-body Shifter cup.. i remember seeing a website that had it for $35, do you know where i can find one? (cant seem to find that site again lol)
Junior Member
Joined: Jul 2011
Posts: 1
Likes: 0
From: Missouri
Car: 1989 Firebird Formula
Engine: 5.3
Re: 1989 5.3/t56 swap underway
I am in the process of gathering everything up to do this very same swap. Can you use the throttle body and injectors off the 5.3 intake and swap it to the LS! intake?
Thread Starter
Joined: Sep 2007
Posts: 533
Likes: 0
From: Crestview, FL.
Car: 1989 IROC-Z, 1979 Malibu Classic
Engine: LSx 5.3
Transmission: MN12 6-speed, 4L60E
Axle/Gears: 4th gen 3.42
Re: 1989 5.3/t56 swap underway
Wow, been a while since've updated this thread. Finally got married, I'm under contract for buying a house that's currently under construction and should be complete in December, everything is moving so fast! Anyways, I've been collecting all my parts to do my cam/intake swap and i've finally found time to throw the cam in, i'm still waiting to get a 90mm throttle body so I can throw my intake on but no big deal. Here's a video of the cam, still need to get it tuned but sounds pretty good. Cam is a Comp Cams Thumpr part # 54-600-11
http://www.youtube.com/watch?v=ETDOG5XlsPY
http://www.youtube.com/watch?v=ETDOG5XlsPY
Senior Member
iTrader: (5)
Joined: Dec 2008
Posts: 719
Likes: 0
From: Alabama
Car: 1986 camaro
Engine: ls2
Transmission: FLT stage 6 60e
Axle/Gears: 8.8 with 3.73's
Re: 1989 5.3/t56 swap underway
bout time! i see nw 90's flloating around tech go get one asap! whos doing your tuning?
Thread Starter
Joined: Sep 2007
Posts: 533
Likes: 0
From: Crestview, FL.
Car: 1989 IROC-Z, 1979 Malibu Classic
Engine: LSx 5.3
Transmission: MN12 6-speed, 4L60E
Axle/Gears: 4th gen 3.42
Re: 1989 5.3/t56 swap underway
Yeah I definitely want a Nick Williams 90, Im not sure who is going to do the tuning. Know anyone!? lol
Senior Member
iTrader: (5)
Joined: Dec 2008
Posts: 719
Likes: 0
From: Alabama
Car: 1986 camaro
Engine: ls2
Transmission: FLT stage 6 60e
Axle/Gears: 8.8 with 3.73's
Re: 1989 5.3/t56 swap underway
weeks does very nice tuning, your options are mailorder tune, get someone else to tune the car, john does a street tne for 250(no wideband), 350(wideband) or a full dynotune for 450.
Thread Starter
Joined: Sep 2007
Posts: 533
Likes: 0
From: Crestview, FL.
Car: 1989 IROC-Z, 1979 Malibu Classic
Engine: LSx 5.3
Transmission: MN12 6-speed, 4L60E
Axle/Gears: 4th gen 3.42
Re: 1989 5.3/t56 swap underway
Wait.... John Weeks!? from Milton? My buddy here at work just told me about him. So is a tune with wideband better!?
Senior Member
iTrader: (5)
Joined: Dec 2008
Posts: 719
Likes: 0
From: Alabama
Car: 1986 camaro
Engine: ls2
Transmission: FLT stage 6 60e
Axle/Gears: 8.8 with 3.73's
Re: 1989 5.3/t56 swap underway
Thread Starter
Joined: Sep 2007
Posts: 533
Likes: 0
From: Crestview, FL.
Car: 1989 IROC-Z, 1979 Malibu Classic
Engine: LSx 5.3
Transmission: MN12 6-speed, 4L60E
Axle/Gears: 4th gen 3.42
Re: 1989 5.3/t56 swap underway
Awesome! I'll just have him do it, just gotta save up some money!
Thread Starter
Joined: Sep 2007
Posts: 533
Likes: 0
From: Crestview, FL.
Car: 1989 IROC-Z, 1979 Malibu Classic
Engine: LSx 5.3
Transmission: MN12 6-speed, 4L60E
Axle/Gears: 4th gen 3.42
Re: 1989 5.3/t56 swap underway
Well, I stuck a vacuum gauge on the car today and it reads 8"hg vacuum at idle, so it looks like i'll have to add a vacuum reserve canister no big deal!
Re: 1989 5.3/t56 swap underway
Yes sirrrrrr!!! Ok, I got my spohn a-arms sold and I pressed new ball joints and control arm bushings in the stock a-arms, I put the a-arms back on the car along withe the stock iroc springs and now I have alot more room underneath the car. Here's how it sits:

And here's the a-arms:

I also got the exhaust taken care of last week, I took it downtown and had a custom Y-pipe made and I originally was going to go with a magnaflow bullet but couldn't seem to find a place to fit it underneath my car. So I went with a single chamber flowmaster race muffler and it sounds AWESOME!!! Here are some pics and a video, it sounds 100 times better in person though!



http://www.youtube.com/watch?v=vm0l25mJjhU
Look forward in a couple weeks to doing a drive-by video and an in car video, i'll be ordering my shocks/struts this week along with a bunch of front end suspension parts and taking it to get the alignment done.

And here's the a-arms:

I also got the exhaust taken care of last week, I took it downtown and had a custom Y-pipe made and I originally was going to go with a magnaflow bullet but couldn't seem to find a place to fit it underneath my car. So I went with a single chamber flowmaster race muffler and it sounds AWESOME!!! Here are some pics and a video, it sounds 100 times better in person though!



http://www.youtube.com/watch?v=vm0l25mJjhU
Look forward in a couple weeks to doing a drive-by video and an in car video, i'll be ordering my shocks/struts this week along with a bunch of front end suspension parts and taking it to get the alignment done.

I go to the website of flowmaster and There are several models and .
Re: 1989 5.3/t56 swap underway
really nice project, and it seems to run very gppd. i´m thinking of doing the same swap. but it seems to be more job with this lm7 engine than the ls1 engine? did you use a lsx harness or did you do on yourself?do you have any wiring diagram if so you can email? Keep up the good work
Senior Member
iTrader: (4)
Joined: Oct 2008
Posts: 857
Likes: 5
From: Niles, IL
Car: '91 LS6/T56/9"
Engine: LS6
Transmission: T56
Axle/Gears: Currie 9"/4.11, detroit truetrac
Re: 1989 5.3/t56 swap underway
Anyone know exactly why it won't fit convertibles? What exactly is different?!
I LOVE the S&W stuff too. Even if you don't want the $300 subframe package, you can just get the $70 crossmember that welds to your SFC's. Awesome, especially for guys without a torque arm mount on their transmissions.
I LOVE the S&W stuff too. Even if you don't want the $300 subframe package, you can just get the $70 crossmember that welds to your SFC's. Awesome, especially for guys without a torque arm mount on their transmissions.
Senior Member
iTrader: (8)
Joined: Mar 2008
Posts: 655
Likes: 2
From: NH
Car: 1967 Firebird P.T.
Engine: LS3 4" Strkr 422ci
Transmission: MN12 6 speed
Axle/Gears: 3.73 8.5" 10 Bolt Eaton
Re: 1989 5.3/t56 swap underway
hey man, i dont know if i showed you yet....
http://www.necamaro-firebird.org/for...hp?f=34&t=7338
goin twin supercharged this time round'
http://www.necamaro-firebird.org/for...hp?f=34&t=7338
goin twin supercharged this time round'
Senior Member

Joined: Dec 2009
Posts: 702
Likes: 4
From: Texas
Car: 1989 IROC LSX
Engine: Swapped LS6 Forged by LME
Transmission: 4L65E
Axle/Gears: 3.73
Re: 1989 5.3/t56 swap underway
Very nice build! I see there have been no updates in a while but If you see this I would like to ask how the A/c Worked out. My swap is pretty much done but I need some A/C!! Did this circut work for you??
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