Everyone is right about the 5.3 except for one thing. Nothing beats the sound of a BIG BLOCK thumping away under the hood of your hot rod. I have just started taking my 05 Sierra apart with the 4.3 and im dropping in a Blue Print Engines 632 Big Block. my thinking is Go Big or Go Home and it come Dynoed at 815 HP. Your video series has helped me with some questions I had about the 4L80e. Thank you
This build has 100% motivated me. I literally sent my daily driver (same truck) to get painted. Got it back ordered drop parts and the money pit has just begun
Hats off to you for an awesome build anyone who says why didn't you go with a 5.3 does not know what its like to have a torque monster sitting under the hood you have a new subscriber.
Looks good man. I thought about doing this swap after popping my last 6.0. But I could only find one decent 8.1 and the guy wanted way more then I was willing to pay. Ended up just building another big 6.0.
Remember the heads on a Pontiac always limit rpm , as does the bore size . Yes , you can throw $ and rev it but a 455 built for max torque and redline of 5500 or so will surprise you . Build what you want to
Love the NON LS swap, being creative and going against the normal. I’m doing the same on my 65 F100, its getting an 04 aviator Dohc 4.6 and 6R80 until the Aussie Barra/6R60 shows up later this year. That 8.1 and a turbo will be a tire shredder and a kick ass tow rig
Lawrence LT Tolman i can set you up with somebody, think he has some in stock. If he doesnt i do know another source that likely does and if not he can have you one within a few months👍🏻
Laurence T, congratulations for daring to be different. I too am a fan of big block, low end torque, especially in the form of a Cadillac 500. My only “truck” cred is that my big block sits between the frame rails of a 1985, S10, 4WD pickup. Topside is a 1950 Studebaker Champion body. I swapped out the 4X4 transfer case in favor of a NVG 149 AWD unit. Like you, my transmission of choice was the 4L80E, which will be tested by twin Garrett 3782’s mid-mounted down low. Oh, the torsion bar suspension was exchanged for front coil-overs. I look forward to future installments of the “Ugly Truck.” Best, bro. d
Man I really feel like tool about my first sarcastic comment I made on the other video and told you about my big turbo forged rod and piston ls2 with a th400 2003 single cab Sierra(I did have gen4 4.8 rods and crank in my half filled ls2 block setup up until this past Wednesday my wife got me surprised me with a summit forged rods and a big boy LJMS cam and alot of arp hardware and clevite bearings and a few other things my engine builder/machinist/best friend was in on all this and basically picked everything I was going to myself lol we me and him balanced the rotating and decked, honed and gave the block a bath and painted black now it looks like a iron block but we slammed it all together in 2 days got everything together to drop it In Thursday had it back in the truck turbo kit on and running on Friday) but after we talked a little bit I understood what your doing and respect the hell out of it and from what I can tell you seem like a cool dude and got to thinking aboutmlm your project I have a buddy who has a Gen1 precision 118mm g trim with a 1.50 exhaust housing its pretty old but has been recently rebuilt and seen it at his shop yesterday and thought it would be badass on your build I looked around and found a shop named Raylar that focus on the 8100's, all you need is one of their mildish boost cam and valve spring kit and this 118mm turbo I have no idea how it will run but I'm thinking with a the boost cam they offer for stock pistons has a 1800-5800rpm power band so I wouldn't be afraid to rev it to around 6200 or 6300rpm so it should spool that turbo and be a little easier on that stock bottom end with that big ass 1.50 exhaust housing
yeah, I've been drooling over Raylar's stuff for a long time now, and hopefully will wind up with some of their parts on this engine, and what you described is exactly what I want to do. Big 'ol turbo and lots of pwer.
Recently subscribed, now watching a 3rd video from you and thinking man this guy gives a good delivery.... wait a minute, I think he was on powernation!
The Chevy big block has always been the go-to item when you want raw, N/A TQ and HP. The Corvair V8 Registry has some late model Corvairs w/ FWD Olds 455 engine/trans units grafted in the back seat area and they are quite the track monsters w/ their four-wheel independent suspension and excellent weight distribution due to the mid-mounting of the engine. They are also a favorite w/ the Corvair Ultra Van camper unit owners, as the standard boxer six was just a bit under-powered for the task of powering a motorcoach. Keep up the good work and I look forward to your modifications to the intake and exhaust, as there very few folk dealing w/ after market pieces for the 8.1.
My thought exactly when I saw the front end off the truck. Then again I get that OP wants a baseline run first. You gotta know where you’re coming from.
Back in 2003 I came so close to buying a 2500 Avalanche with the 8.1. But I decided that I need a little better mpg so got the 1500 Silverado with the 5.3. Salesman said they hit well over 120 mph with that big motor. Not sure I believe them since I'm guessing the computer would not let it go over 100. Every think of putting some insulation in your shop and installing a mini split? I bet you could cool that down to at least 68 degrees and great heat in the winter. You and Tommy are my favorite on the Power Nation Team. So you two get a 10 the others get a 9.99999999.
LT, you seem to go with the off the wall stuff. '76 C10 with a 472 caddy, awesome. Or I should say non-traditional. I can't wait to see it run, and your opinion of it's power.
I have a similar plan for my scout, I have a 454 that I plan to run the p30 crank sensor, vortec intake, vortec dizzy for cam sensor, ls coils and a 0411 ecu to run it
Who says a 5.3 will make more power than a 496? 😐 a very mild cam in this beast will make tremendous power! I found one... The yard pulled it before i could and now they want three times the price for it so i got the 454...still a monster!
It would be essentially the same. The under hood width is the same between the 1/2 ton and 3/4 ton. There might be slightly less height under the hood.
Hey LT, did you use the donor ECU, or did you use the 5.3 ECU with the re-wired harness. I wanted to do this same swap in a truck with a 4.8L LS with a 4L80 trans, just don't know where to start. Thanks.
Lawrence, you are way more enjoyable then the power block! Loving your 8.1 build, I’m curious about what it’s going to feel like with all that bottom end torque! I’m having my blown 5.7 Hemi converters into a forged & arp 6.4 stroker motor with ring gap, 11:0:1 compression, and comp torque cam for my 13 Ram 1500, boost ready! It’s always fun to do a bigger motor, especially a big block!! I’ve been waiting a while for someone to do a build like yours.
Lawrence LT Tolman. Awesome bro, looking forward to it! I’ll let you know how my build goes to. Be fun to meet up person sometime at a Cars & Coffee, I’m in Tn often visiting friends in Chattanooga.
I realized today that the 5.7L Vortec was the older setup with the spider fuel injectors and distributor. I think I'm out of luck unless you've got some ideas.
I really like that you’re going your own route. In my look at the Vortec 8100 it didn’t sound robust enough for forced induction, but maybe that’s without supporting mods. My wife’s 55 has a 5.3L and I like it, but I have a DOHC LT5 for my 57 and may someday squeeze a SOHC Ford 6.2L in my Town Car. LS and Coyote are easier, but where’s the fun in that?
Just curious, if you have the 8.1 engine harness available, How not just swap it in? Anywhere you have to solder or butt connect, leaves a weaker link Than the factory harness.
yeah, in theory, but I chose to modify the 5.3 harness because of a few reasons like my donor harness was for an Allison and I had a 4L80, I had a drive by cable truck and not a drive by wire like the harness had, and the accel pedal sensor and TAC module that came with the 8.1 were smashed to bits...
Lawrence LT Tolman ok I’m wondering cause I may try this setup in my 85 elcamino that’s if the 8.1 oil pan will fit Also wondering if maybe the trans plug can be changed and repinned to work with the 4l80 . I have a 5.3 in my 69 cutlass and I used the stock truck fuse panel and it made wiring sooooo much simpler
Alain Renteria never heard about it affecting the signal, especially considering components on circuit boards are soldered in place, but I know in aircraft applications they don’t allow solder because they’re afraid it can crack due to vibration.
Im thinking of an 8.1 swap. Was going to grab the motor/trans/ecu/harness out of the vehicle the 8.1 comes from. Is there benefits of using an LQ4 LS computer instead of the L18. Thanks in advance
it kind of depends on what parts combo you're using. If you are using the engine and trans as-is, then yeah, just grab everything from the donor truck, including the throttle pedal, TAC module, trans control module (if an allison) complete wiring harness, airbox, and so on
@@LawrenceTolman on the fence atm about using a 4L80 or a th40O also if I want turbo or supercharger.. But plan is track car/Sunday cruiser. Thanks for the advice
Actually, all those people are wrong in a sense about the engine power gains comparisons.. 1st of all please look at the specs across the board from factory between the 2 engines. 2nd, take the estimated amount money you'd need to sink in the stock 5.3 in aftermarket parts and labor to amount to the factory specs of the 8.1. 3rd, take that same amount of money and parts and do the exact same to the 8.1 and compare output again. Point is, the 8.1 is going to have the most hp and tq easily available for the lowest amount of paper than it's little brother. Remember, these engines back in the day became an instant game changer with just a set of headers added. You'd have to invest internal and external accessories to the 5.3 beyond 5 grand to amount to the 8.1 with a simple tune, headers, cold air intake, tbs, exhaust and a mild cam. Now, I'm not throwing small blocks under the buss by any means, I'm just saying for the money you'll get more power across the board for a lower budget and that's not even mentioning the 8.1 was tested full throttle for 300 hours by gm with no issues given!
Like your videos on ugly.i have a truck I did a 8.1 swap that had a ls 6.0l.done the complete swap.but haven't been able to get it to run.no fuel or spark.did the wire swap.got 12v at both and signal on both. but no start.any suggestions .
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TV show personality, instructions and explanations, dude in his garage, no fancy shit. Love it LT.
Agree this this whole statement ! this is better than those shows on TV' ; Also get ready for the fuel bill for that 8.1
Yep sounds like a guy from the show trucks
@@ianwilson1986 well
...yea... he is lol
Ian Wilson I’m sure this is sarcasm, but for the passerby’s he is. Lol
@@ianwilson1986 that show was ok back in 2003 or so
Exactly what you want after an engine swap like this...reach in and hit the key and she fires right up like you hoped it would. Nice job.
rbarger71 thanks man! That was a huge sigh of relief when it popped off
What about the other 37 tries that he didn't show
Ahhhhh so nice to see a De-LS swap...finally someone who actually wants to do something different.
Everyone is right about the 5.3 except for one thing. Nothing beats the sound of a BIG BLOCK thumping away under the hood of your hot rod. I have just started taking my 05 Sierra apart with the 4.3 and im dropping in a Blue Print Engines 632 Big Block. my thinking is Go Big or Go Home and it come Dynoed at 815 HP. Your video series has helped me with some questions I had about the 4L80e. Thank you
sure thing! a 632 sounds badass!
I have a 1986 c10 with a 1973 Cadillac 472 and love the torque of engine! One of the best engine swaps I've ever done.
I wanna see some more in that! I wanna build another one, my 76 with the 472 was a ton of fun.
This build has 100% motivated me. I literally sent my daily driver (same truck) to get painted. Got it back ordered drop parts and the money pit has just begun
WayneswheelsATX ATX sorry about that (but not sorry lol). I fully endorse any money pit project.
Lawrence LT Tolman question is, do you sponsor money pits? 🤪
This is much better than when you were on the fancy TV show. Glad to see we can still learn from you
Hats off to you for an awesome build anyone who says why didn't you go with a 5.3 does not know what its like to have a torque monster sitting under the hood you have a new subscriber.
thanks for the kind words, and I appreciate the subscription!
Looks good man. I thought about doing this swap after popping my last 6.0. But I could only find one decent 8.1 and the guy wanted way more then I was willing to pay. Ended up just building another big 6.0.
I'm getting ready to do this and I'm glad I found your channel the wiring was one of my big concerns and I really appreciate your help
How is this guy not more YT Famous? Absolute pure Knowledge! Keep it up, Us weekend warriors love these Vids!!!
I appreciate that so much!
Like a pro! Reached in an fired up first time, can’t wait to see it on a dyno!
Just came across a 2001 suburban with 5.3, been sitting for years, I plan to swap with 8.1 or 6.0.
Thanks for the video!
Better than half the hosts on hotrod TV really enjoyed the video. I've started looking for a 8.1 locally in the junk yards. Twin t45s one day
I put a 455 Pontiac in a 77 square body, so I totally understand wanting to build something unusual.
Once I pick up a 4th gen trans am I want to make it Pontiac powered like a 455 😈
Remember the heads on a Pontiac always limit rpm , as does the bore size . Yes , you can throw $ and rev it but a 455 built for max torque and redline of 5500 or so will surprise you . Build what you want to
Holy Shit... dude from Engine Power is doing an engine power video from home. Did gon be good.
No way...dude makes this look too easy.
Sounds like she's ready to party!! Kudos on the different combo LT. Big block for the win!
Love the NON LS swap, being creative and going against the normal. I’m doing the same on my 65 F100, its getting an 04 aviator Dohc 4.6 and 6R80 until the Aussie Barra/6R60 shows up later this year. That 8.1 and a turbo will be a tire shredder and a kick ass tow rig
I would also love to get my hands on a Barra!
Lawrence LT Tolman i can set you up with somebody, think he has some in stock. If he doesnt i do know another source that likely does and if not he can have you one within a few months👍🏻
Amazing job ugly truck is going to be one of a kind
Sounds healthy man keep up the good work bro!! 👍
What you are doing sir is called, classic hotroding. Keep it up 🤘🤘🤘
Laurence T, congratulations for daring to be different. I too am a fan of big block, low end torque, especially in the form of a Cadillac 500.
My only “truck” cred is that my big block sits between the frame rails of a 1985, S10, 4WD pickup. Topside is a 1950 Studebaker Champion body. I swapped out the 4X4 transfer case in favor of a NVG 149 AWD unit. Like you, my transmission of choice was the 4L80E, which will be tested by twin Garrett 3782’s mid-mounted down low. Oh, the torsion bar suspension was exchanged for front coil-overs.
I look forward to future installments of the “Ugly Truck.”
Best,
bro. d
This is a sweet build man I can’t wait till you upgrade it
Bro you're crazy for this swap I'm all eyes 👍🏽👍🏽👍🏽👍🏽👍🏽👍🏽
Man I really feel like tool about my first sarcastic comment I made on the other video and told you about my big turbo forged rod and piston ls2 with a th400 2003 single cab Sierra(I did have gen4 4.8 rods and crank in my half filled ls2 block setup up until this past Wednesday my wife got me surprised me with a summit forged rods and a big boy LJMS cam and alot of arp hardware and clevite bearings and a few other things my engine builder/machinist/best friend was in on all this and basically picked everything I was going to myself lol we me and him balanced the rotating and decked, honed and gave the block a bath and painted black now it looks like a iron block but we slammed it all together in 2 days got everything together to drop it In Thursday had it back in the truck turbo kit on and running on Friday) but after we talked a little bit I understood what your doing and respect the hell out of it and from what I can tell you seem like a cool dude and got to thinking aboutmlm your project I have a buddy who has a Gen1 precision 118mm g trim with a 1.50 exhaust housing its pretty old but has been recently rebuilt and seen it at his shop yesterday and thought it would be badass on your build I looked around and found a shop named Raylar that focus on the 8100's, all you need is one of their mildish boost cam and valve spring kit and this 118mm turbo I have no idea how it will run but I'm thinking with a the boost cam they offer for stock pistons has a 1800-5800rpm power band so I wouldn't be afraid to rev it to around 6200 or 6300rpm so it should spool that turbo and be a little easier on that stock bottom end with that big ass 1.50 exhaust housing
yeah, I've been drooling over Raylar's stuff for a long time now, and hopefully will wind up with some of their parts on this engine, and what you described is exactly what I want to do. Big 'ol turbo and lots of pwer.
@@LawrenceTolman that cam from them is pricey but that and some springs is all you need if you will use that 118 il do my best to get it to cheap ASF
Nothing like the sound of a big block!
you got that right! you'll have to watch the dyno video to see how it sound with the new exhaust
Love the big block, anybody can have an LS. I like that you do things different! like the all wheel drive Silverado. Lowering a 4 wheel drive. Awesome
thanks man! Im glad someone else enjoys the out of the mainstream stuff as well
Im glad you have a RUclips channel LT, just subscribed
Appreciate it!
Keep the content coming LT.
I’m your 5,000th subscriber. Glad to find this channel.
👍👍👍NICE JOB NOT MANY PEOPLE DOING THIS SWAP
for sure, its not a very popular swap, but thats what is appealing to me
Wow! The level of detail of your videos is awesome!
Awesome man! Can't wait to see it burning the tires off!
Such a beautiful engine!
I had no idea it was this simple. Awesome video!!!
Looks cool, good job man! Now you just need to make it turbo AWD
AWD means no burnouts...trucks like this are for burnouts and ice cream.
Recently subscribed, now watching a 3rd video from you and thinking man this guy gives a good delivery.... wait a minute, I think he was on powernation!
The Chevy big block has always been the go-to item when you want raw, N/A TQ and HP. The Corvair V8 Registry has some late model Corvairs w/ FWD Olds 455 engine/trans units grafted in the back seat area and they are quite the track monsters w/ their four-wheel independent suspension and excellent weight distribution due to the mid-mounting of the engine. They are also a favorite w/ the Corvair Ultra Van camper unit owners, as the standard boxer six was just a bit under-powered for the task of powering a motorcoach. Keep up the good work and I look forward to your modifications to the intake and exhaust, as there very few folk dealing w/ after market pieces for the 8.1.
Clean work man love how you take your time on things and comes aut right 🔥
Good to see you LT.
So much better than the “projects” on Truck Tech
Thanks! (I think)
@@LawrenceTolman you and Austin are awesome, this just feels more raw and real, like things people can and actually will do at home.
@@LawrenceTolman hey lt just curious how long you guys take to shot a season on powerblock
Keep up the great work. It is sounding Great!
Happy 4th the July man 💥
I'm an LS guy, but props for doing your own thing!
Doing good my man love it
I'm so pumped for this build!
That was freaking rad bud!!! Keep the content rollin!
Nice work, I'm enjoying the build.
Wow. Easier than I thought. 👍🏼
It is! not too bad, just tedious work. a little patience goes a long way for something like this
Yknow while you have the front end off you could do a cam swap and wake her up
Very true. But I do wanna Dyno it bone stock first.
Lawrence LT Tolman Just don’t blow air into a stock motor
@@LawrenceTolman yay more content.
My thought exactly when I saw the front end off the truck. Then again I get that OP wants a baseline run first. You gotta know where you’re coming from.
Back in 2003 I came so close to buying a 2500 Avalanche with the 8.1. But I decided that I need a little better mpg so got the 1500 Silverado with the 5.3. Salesman said they hit well over 120 mph with that big motor. Not sure I believe them since I'm guessing the computer would not let it go over 100. Every think of putting some insulation in your shop and installing a mini split? I bet you could cool that down to at least 68 degrees and great heat in the winter. You and Tommy are my favorite on the Power Nation Team. So you two get a 10 the others get a 9.99999999.
thanks for the vote of confidence! I have considered many times putting a system out there to cool it off, but we'll get there!
Now that’s different I like it bro keep it up!!
Sounds like my motorhome, but 15000,00 lb. less weight.
LT, you seem to go with the off the wall stuff. '76 C10 with a 472 caddy, awesome. Or I should say non-traditional. I can't wait to see it run, and your opinion of it's power.
No it's time for the vinyl man to make you an SS 496 badge. :)
I have a similar plan for my scout, I have a 454 that I plan to run the p30 crank sensor, vortec intake, vortec dizzy for cam sensor, ls coils and a 0411 ecu to run it
Who says a 5.3 will make more power than a 496? 😐 a very mild cam in this beast will make tremendous power! I found one... The yard pulled it before i could and now they want three times the price for it so i got the 454...still a monster!
Damn dude, you're good!!
Thanks!!
i Like the Unique build Just like every dodge guy swaps the 488 V10 8.0l doge with a CDT i personally like the v10
Dude, sick!
I wonder how easy a procharger kit for a 2500 would bolt up with the 8100 in the 1500 truck?
It would be essentially the same. The under hood width is the same between the 1/2 ton and 3/4 ton. There might be slightly less height under the hood.
Country Joe that’s what I was thinking too. A Procharger on that setup would awesome!
There is a company that builds only these 8.1 and the have a twin screw for it badass stump pulling low end torque
I would make little adapters so you don't have to chop or reinvent the factory harness. In case you go back to an LS engine.
Love the truck 8.1 my favorite dont care how much more it cost what part of tn you in iam in clarksville currently 6.0 4l80e swapping my 95 yukon gt
Hey, are you the guy from truck teck or power nation??
I am
Hey LT, did you use the donor ECU, or did you use the 5.3 ECU with the re-wired harness. I wanted to do this same swap in a truck with a 4.8L LS with a 4L80 trans, just don't know where to start. Thanks.
Used the stock 5.3 computer, no problems at all.
Hey bud. Mind if I ask where you got your 8.1 engine? I have a 8.1 chevy that has a pretty good knock. And wanna replace it. Thanks for any info
Can't wait!!!😃
Nice work
How difficult would you consider it to swap the 8.1 in place of the L29 vortec in a 97 k3500? I know thousands do ls swaps but this is so similar.
Can you expect tremendous low end response with streetable duals? I used dual exhaust out the rear on LS.
Digging the ugly truck! Especially since the swap. So maybe I missed it, but what software were you using for the tune changes?
using HP Tuners to reflash the ECM
Did you keep the DBC What did you do for oil filler tube from hitting the throttle butterfly cam ?
yes, it is drive by cable, and for the oil fill tube, I just welded an elbow on it to move it out far enough so the cable wouldn't hit
What did you have to do to refresh the computer
Or did you just get an 8.1l computer
Lawrence, you are way more enjoyable then the power block! Loving your 8.1 build, I’m curious about what it’s going to feel like with all that bottom end torque!
I’m having my blown 5.7 Hemi converters into a forged & arp 6.4 stroker motor with ring gap, 11:0:1 compression, and comp torque cam for my 13 Ram 1500, boost ready! It’s always fun to do a bigger motor, especially a big block!! I’ve been waiting a while for someone to do a build like yours.
thanks for the kind words, and I'll be sure to drop a video letting everyone know exactly how the thing drives once its put together!
Lawrence LT Tolman. Awesome bro, looking forward to it!
I’ll let you know how my build goes to. Be fun to meet up person sometime at a Cars & Coffee, I’m in Tn often visiting friends in Chattanooga.
What was the reason that you decided not to use the L18 harness? Was it originally in front of an Allison?
Yeah, because it was from an Allison and because it was drive by wire
I realized today that the 5.7L Vortec was the older setup with the spider fuel injectors and distributor. I think I'm out of luck unless you've got some ideas.
I really like that you’re going your own route. In my look at the Vortec 8100 it didn’t sound robust enough for forced induction, but maybe that’s without supporting mods. My wife’s 55 has a 5.3L and I like it, but I have a DOHC LT5 for my 57 and may someday squeeze a SOHC Ford 6.2L in my Town Car. LS and Coyote are easier, but where’s the fun in that?
Exactly
The EDGE aftermarket controllers are a great way to add power to the factory 8.1L
Curious why didn’t get the 8.1 computer for the swap or adapt the 8.1 harness to the 5.3 computer?
Mainly because the 8.1 harness was drive by wire and for an Allison transmission.
Lawrence LT Tolman Thanks for replying LT, probably was easier, didn’t realize was an Allison.
Just curious, if you have the 8.1 engine harness available, How not just swap it in? Anywhere you have to solder or butt connect, leaves a weaker link Than the factory harness.
It wouldn’t have been a direct swap, since it’s from an Allison transmission and drive by wire
5.3 is great. I prefer the 6.0
You may have covered this... But did you have to change out computers?
nope. starts and idles with the stock computer, but I have since flashed in an 8.1 specific tune into the stock computer
Will the front springs need to be replaced because of the extra weight of the engine?
gonna find out! it honestly wouldn't bother me if it did sit a little bit lower anyway
Dosnt the L18 have the same fuse panel under the hood as the 5.3? If so couldn’t u just unplug the 5.3 harness and plug the L18 harness right into it?
yeah, in theory, but I chose to modify the 5.3 harness because of a few reasons like my donor harness was for an Allison and I had a 4L80, I had a drive by cable truck and not a drive by wire like the harness had, and the accel pedal sensor and TAC module that came with the 8.1 were smashed to bits...
Lawrence LT Tolman ok I’m wondering cause I may try this setup in my 85 elcamino that’s if the 8.1 oil pan will fit Also wondering if maybe the trans plug can be changed and repinned to work with the 4l80 . I have a 5.3 in my 69 cutlass and I used the stock truck fuse panel and it made wiring sooooo much simpler
Making his own 496SS
yessir
Doesn't using solder affect the signal of the sensors, rather than using butt connectors?
Alain Renteria never heard about it affecting the signal, especially considering components on circuit boards are soldered in place, but I know in aircraft applications they don’t allow solder because they’re afraid it can crack due to vibration.
Im thinking of an 8.1 swap. Was going to grab the motor/trans/ecu/harness out of the vehicle the 8.1 comes from. Is there benefits of using an LQ4 LS computer instead of the L18. Thanks in advance
it kind of depends on what parts combo you're using. If you are using the engine and trans as-is, then yeah, just grab everything from the donor truck, including the throttle pedal, TAC module, trans control module (if an allison) complete wiring harness, airbox, and so on
@@LawrenceTolman on the fence atm about using a 4L80 or a th40O also if I want turbo or supercharger.. But plan is track car/Sunday cruiser. Thanks for the advice
Actually, all those people are wrong in a sense about the engine power gains comparisons.. 1st of all please look at the specs across the board from factory between the 2 engines. 2nd, take the estimated amount money you'd need to sink in the stock 5.3 in aftermarket parts and labor to amount to the factory specs of the 8.1. 3rd, take that same amount of money and parts and do the exact same to the 8.1 and compare output again. Point is, the 8.1 is going to have the most hp and tq easily available for the lowest amount of paper than it's little brother. Remember, these engines back in the day became an instant game changer with just a set of headers added. You'd have to invest internal and external accessories to the 5.3 beyond 5 grand to amount to the 8.1 with a simple tune, headers, cold air intake, tbs, exhaust and a mild cam. Now, I'm not throwing small blocks under the buss by any means, I'm just saying for the money you'll get more power across the board for a lower budget and that's not even mentioning the 8.1 was tested full throttle for 300 hours by gm with no issues given!
So no flashing or tuning? It seems like a nightmare when trying to do anything these days. Thank you!
Very cool swap..
Very cool
Are you running the pcm for the 5.3?
Nice work How much do I have to change doing a hummer 6.0 swap to a 8.1L ?
Funny, my bosses dad has an old shop truck just sitting. 80's Chevy with a
500 Cadillac.
Did you have to change the tune or did it just run on 5.3 ecu? What year is the 8.1?
No tune yet, the startup was in the stock 5.3 tune but I do have an 8.1 tune to flash in
@@LawrenceTolman Cool, good to know. 👍
Did you change the suspension?
Like your videos on ugly.i have a truck I did a 8.1 swap that had a ls 6.0l.done the complete swap.but haven't been able to get it to run.no fuel or spark.did the wire swap.got 12v at both and signal on both. but no start.any suggestions .
So does it bolt right up to the 4l80e? Did he have to change the ecu or get it flashed?
Bolts right up to the 4l80 no problem. This startup was on the stock 5.3 tune, but I will flash in a 8.1 tune
Did u retuned the 5.3 pcm for 8.1?
Kool swap 👍. I'm wanting to do a vortec v6 to LS3 swap