8.1 or 6.0???

[xeqshnr]

In the search for a LQ4 for my 94 Yukon 2dr I ran across an 8.1 a GM tech friend of mine aquired. Has minimal damage but needs rebuilt. I can snag it for $1000. I realize theres not a ton of aftermarket support for these but it sounds like fun motor to have in a street/mud toy with a lift a big tires, with a few mods. Of course a 14 bolt sf rear and a built 4l80e would be in order, but I need a new trans anyway. And LQ4's are pretty scarce locally. Thoughts???

 

[livingez_123]

you can get all the go fast goodies you need for the 8.1. The big block has mud toy written all over it!

 

[ezdaar]

6.0 is FAR more reliable and can make just as much if not more power for less.
Get the 6.0, drop some decent heads and a good torque cam, you wont regret it.
Bonus is its easy to replace vs finding another big block if you blow it.

 

[xeqshnr]

I do like the 6.0... just having trouble finding one locally. Raylar Engineering is about the only place Ive found good stuff for the 8.1. That being said Im not in a huge hurry on this project. Probably wont touch it till spring or summer. If they werent so cashy Id drop a 6.0 out of a G8 in it. All aluminum and they already have L92 heads.

 

[makindust2]

8.1 swap

I am doing this swap also .I am installing a 2000 8.1 into a 1997 tahoe. I have a never used crate engine and the ass parts and a arazona speed and marine harness. I have the ecm also and that is were I am stumped.
Do I use the stock tahoe computer and piggy back the 8.1 computer.
Meaning when controls anything passed the engine (gauges etc)
I also have to get a 4l80e .
Any Help would be appreciated.
Thanks Skip

 

[livingez_123]

You don't want the all-aluminum engine, the cast iron block is a better choice for hp. Besides, the extra 80lbs won't be noticed in your rig.

 

[SunlitComet]

This is true.

---------- Post added at 02:31 PM ---------- Previous post was at 02:29 PM ----------

I am doing this swap also .I am installing a 2000 8.1 into a 1997 tahoe. I have a never used crate engine and the ass parts and a arazona speed and marine harness. I have the ecm also and that is were I am stumped.
Do I use the stock tahoe computer and piggy back the 8.1 computer.
Meaning when controls anything passed the engine (gauges etc)
I also have to get a 4l80e .
Any Help would be appreciated.
Thanks Skip

Use both pcms. the 8.1l for the drivetrain. And the old one to accommodate continued used of abs, cruise, speedo among other things.

 

[makindust2]

8.1

Thanks Sunlit ,I will have to figure out how to do that double computer thing but it does make sense. I am going to start the swap next week

 

[SunlitComet]

It gets complicated but it is possible.