8.1 496 fuel injected in 66 suburbun

[c.brown]

just trowing around the idea of puting one of these engines a 496 8.1 liter fuel injected in my 66 suburban just wondured if anyone done this and if so whats the pros and cons thanks

[Captainfab]

It shouldn't be much different that converting to a 5.3 a 6.0 or any other LSX engine. I believe that the 8.1 are a drive by wire though. There are a few guys on this forum that have done the 5.3 or 6.0 swap. I'm sure one of them will chime in.

I would say there would be more pros than cons.

[jgh64pkup]

i think the 8.1 is like a bbc

[Captainfab]

That is true, and a big block will fit without a lot of work as well.

Originally Posted by jgh64pkup

i think the 8.1 is like a bbc

[jgh64pkup]

i just looked this up and it has both ls and regular motor mounts

[Captainfab]

Do you have a link where you found the info?

Originally Posted by jgh64pkup

i just looked this up and it has both ls and regular motor mounts

[TheDark1]

I have one in my '04 Truck. It's like an old school block with the modern LS style heads. Mine is a drive by wire. Conventional looking gas pedal with a potentiometer with wires instead of a cable. I didn't look at the motor mounts though. The torque is awesome. Let me know if you need any info on it.

[c.brown]

thanks for the info sofar but what im really trying to find out how to do the computer so it will run thanks guys

[Captainfab]

First you will need to have the engine wiring harness reworked (unless you can do it yourself) to accomodate your specific installation. Then once that is done, you will need to have the PCM reflashed to eliminate unused system components (EGR, extra O2's,VATS, etc), and be 'tuned' to work in your vehicle. Most guys send them off to companies that specialize in that sort of thing. Although if you're savy enough you can do it yourself with a program such as EFILive.

There are many companies that can reflash your PCM, but here are a few. Most of these can rework your harness as well.

http://www.fastchip.com/
http://www.lt1swap.com/
http://www.currentperformance.com/
http://www.wait4meperformance.com/
http://www.nelsonperformance.com/

And if you want to give it a try yourself.....

http://www.efilive.com/
http://www.tunercat.com/

Let us know if you to go forward with this project, I'm sure we'd all like to see your Suburban. Some of us may be able to help you out some too. Are you planning on running the overdrive trans that is behind the 8.1?

Originally Posted by c.brown

thanks for the info sofar but what im really trying to find out how to do the computer so it will run thanks guys

[Scot_Douglas]

Originally Posted by c.brown

thanks for the info sofar but what im really trying to find out how to do the computer so it will run thanks guys

I might be able to help out a little bit in that department.

[c.brown]

thanks more info not sure what trans is best to run with the motor havent got that far yet anybody know how much an 8.1 is worth i can get one for 3000 with harness no computer

[Clyde65]

You will have to trim the frame a smidge too. The 63-66 trucks all need that to install an LS motor in them. I would suggest motor mounts from CPP ( $129.00) this will greatly help your headers/manifolds depending on what you use. You can go with the stock mounts for a small block, but I think the 8.1 is a big block isnt it? Big blocks were not available until like 68 I think. I put in an ls in my 65 truck and use Wait4me performance, so far so good. I alo would suggest you get the 4L80E trans to handle all that torque, a 4l60/700 wont handle it especially if you have performance mods done to it.

[Scot_Douglas]

Originally Posted by c.brown

thanks more info not sure what trans is best to run with the motor havent got that far yet anybody know how much an 8.1 is worth i can get one for 3000 with harness no computer realy need to sell my 468 first if anyones interested about 600 plus horse dart 320 heads 12/1 compression heres some pics of suburban and motor im trying to get rid of thanks again

$3000 sounds steep - I know it isn't the same engine, but a friend just bought a low mileage 2007 L33 (all-aluminum) 5.3L with the the whole engine harness and the accelerator pedal for $1200 shipped to his door.

I'd expect to see a 8.1/allison combo sell for that.

[thirdstreettito]

Here is a cheap one for ya.

http://allentown.craigslist.org/pts/1416390796.html

[Hottrucks]

ok lets say I wanted to do the same thing to my C10 my plan was to pull everything out of the truck from fan to tailshaft..the uPull it yard here sell all there engine/trans combos for the same $$ ( STUPID CHEAP) 20 buck for the harness and 20 for the cpu....what are you guys deleteing to need to have the cpu retuned??

and the BIG??? is what do these engines come in ....I'm looking at all options for a heart trans plant to up grade my 327 auto truck...saw this post and thought I would ask about these motors

[msgross]

cbrown,

good luck with your search but please read the site rules in regards to selling parts though, you must be a paid subscriber to offer items. Thanks...

[Jebenubin]

I know you can find a lot of 8.1/4L80E combos in the 01-05 3/4 ton suburbans. I found an 8.1/Allison 1000 complete chassis from an 05 HD crew cab with only 70,000miles for 3K in Salt Lake.