swap question - Great Lakes 4x4. The largest offroad forum in the Midwest

biggs-cj · June 19th, 2006, 04:17 PM

just picked up a 91 suburben.....5.7 l tbi,700r4 trans 208 tk
i,m going to put the drive tran an axles in another rig.......how much of the harness do i need? and were s the computer on the sub at?also it has a bent flywheel......will a older 350 flywheel work ?or is the 91 motor flywheel weighted different?

Yetti · June 19th, 2006, 07:23 PM

how the hell do you bend a fly wheel?
are you sure your not talking about the harmonic balencer on the front of the engine?
if its the balencer then you can use any 5.7 parts from `86 t0 `94 without problems. the lower ends are all the same.
as for wiring harness you will need everything including the colume. be gentle of you will end up butchering the darn thing.

biggs-cj · June 19th, 2006, 07:43 PM

nope the flywheel has a mayger wobel......the guy i got the sub from paid some dum ass to put a motor in and never tightend the torqconverter bolts......he thought it had a rod going,,and didnt want to fix it.

....i tightend them up and the noise stoped but it looks like the flywheel has a wobel/thanks for the info,,,i dont want to change the colems out ,so i,m going to put a carb on it

CHVYPWR · June 19th, 2006, 09:42 PM

Quote:

Originally Posted by biggs-cj

i dont want to change the colems out ,so i,m going to put a carb on it

I didn't swap columns onthe silver XJ when I added the multi-port inj. TBI is an easier system to swap than MPFI from what I hear. Allyou'd need to do is add the subs wiring harness to the proper power point on the recieving vehicle. Thats all I did with the XJ.

Stone · June 19th, 2006, 10:09 PM

This has most of the diagrams you need for the tbi. I'm doing a 91 4.3l TBI and it is pretty easy
http://www.ih8mud.com/tech/tbi350.php

IIRC the ECM are behind the glove box.

biggs-cj · June 20th, 2006, 05:54 AM

thanks for the help

KILLER"B"468 · June 27th, 2006, 05:32 PM

Quote:

Originally Posted by biggs-cj

thanks for the help

If you are going to run a carb on it I have a TBI to carb edlebrock intake. That is if you need one.

Haggar · June 27th, 2006, 07:47 PM

Not a flywheel.. that there would be a flex plate.

June 19th, 2006, 04:17 PM	#1
biggs-cj Senior Member Join Date: 02-08-06 Location: perry,mi Posts: 732 iTrader: (0)	swap question just picked up a 91 suburben.....5.7 l tbi,700r4 trans 208 tk i,m going to put the drive tran an axles in another rig.......how much of the harness do i need? and were s the computer on the sub at?also it has a bent flywheel......will a older 350 flywheel work ?or is the 91 motor flywheel weighted different? Last edited by biggs-cj; June 19th, 2006 at 04:20 PM.

June 19th, 2006, 07:43 PM	#3
biggs-cj Senior Member Join Date: 02-08-06 Location: perry,mi Posts: 732 iTrader: (0)	nope the flywheel has a mayger wobel......the guy i got the sub from paid some dum ass to put a motor in and never tightend the torqconverter bolts......he thought it had a rod going,,and didnt want to fix it. ....i tightend them up and the noise stoped but it looks like the flywheel has a wobel/thanks for the info,,,i dont want to change the colems out ,so i,m going to put a carb on it Last edited by biggs-cj; June 19th, 2006 at 07:46 PM.

June 19th, 2006, 10:09 PM	#5
Stone Ultimate Mall Wheeler Join Date: 11-06-05 Location: Bay City, Rochester Posts: 838 iTrader: (5)	This has most of the diagrams you need for the tbi. I'm doing a 91 4.3l TBI and it is pretty easy http://www.ih8mud.com/tech/tbi350.php IIRC the ECM are behind the glove box.

June 20th, 2006, 05:54 AM	#6
biggs-cj Senior Member Join Date: 02-08-06 Location: perry,mi Posts: 732 iTrader: (0)	thanks for the help

June 27th, 2006, 07:47 PM	#8
Haggar Covered in mud... Join Date: 11-06-05 Location: Oxford, MI Posts: 16,816 iTrader: (48)	Not a flywheel.. that there would be a flex plate.