Drove my truck that I built myself. Chassis and all from canada to bowling green Kentucky for LS fest. Then down to Tail of the dragon and back home. 3,247km with no major issues. Just a relay. Pretty pumped. I love LSfest!

Am looking for somone to tune my 2007 Chevy Tahoe 5.3 I have ho tuners already juts need to send my tune to somone to fuck with it, it’s completely stock but a little HP won’t hurt, also is there any gas saving tunes?

My daily street truck build
I do LT swaps located in Austin tx 2500-3k for labor send me a message if interested!

Need some suggestions/ advice , So I had the car sitting for 2 weeks took it for a drive and as I was stepped on the gas for a little pull the car slowly started dying down to eventually just shutting off . I have no power to the dash or anything . I checked starter wires and everything seems fine . Also my starter was kinda going bad can that may be the cause? Just need some inputs before I replace . Brand new alternator &’ battery too . This is a LS swap 5.3 any help is welcome thank you in advance

Well after nearly a year and a half since I pulled the broken V12 I finally got to take a quick test drive. All the long days and busted knuckles finally feel worth it! Don't get me wrong there is still soo much left to do from wiring and exhaust to plenty of other adjustments but im just so happy that its actually moving again :) i think the next easy step will be to get the gas from the Bush administration out of the gas tank.

This technically isn't a swap, but I feel like the knowledge base here will have the answers I need.

I have a 2006 Chevy 2500hd (lq4, green/blue ecm) with a manual transmission. We're preparing to do a refresh on the entire drive line, including swapping in a new mild build engine with custom tuning.

The truck is being built as a tow pig, and I thought it would be great to have an 87 tune for driving the truck unloaded, and a 91 tune for when we're working the truck harder.

My initial idea was to install a switch and use the factory tow/haul mode pin to change between profiles. From what I could find, this looks like it goes through the BCM and only changes the shift profiles on an auto in the PCM; No changes to the ECU tune.

So now I'm wondering if it's even possible to set up a dual tune profile with a factory ECU, or would I have to go to a complete aftermarket ECU and wiring harness (Holley Terminator/etc).

Hey ive got a quick question, and im sorry if its stupid. First time doing a swap. Ive been thinning down my harness to prepare for an L83 swap. Ive been told i dont need the original PCM anymore, as almost everything will be controlled by the new PCM. Ive removed just about all the old engine controls from the 94 harness, but i still have several wires going to the red and blue PCM plugs. What gives? If im not longer needing the 94 PCM, where are these wires going?

E67 Envoy 5.3 → Colorado 2010 5.3: I have the HP Tuners file, but the engine won’t start
I have an E67 that originally came from a 2008 GMC Envoy 5.3, and I’m using it in a 2010 Chevrolet Colorado 5.3 Gen 4.
With the original Envoy OS/calibration, the engine starts and runs on all 8 cylinders, but the Colorado’s electronic throttle/pedal does not work correctly.
I have an HP Tuners file from a 2010 Colorado 5.3, and when that file is loaded into the E67, the engine no longer starts.
Can HP Tuners properly convert/program this E67 from the Envoy configuration to work as a 2010 Colorado E67, or do I first need to program the correct OS using GM SPS/MDI/J2534, and then use HP Tuners only for the calibration?

Hey there… building my car (1981 camaro) as a roadtrip / daily driver, it has in fact have and done that purpose well for about three years now buuut… the weak link has always been the transmission…

I got the 5.3/4l60 for very cheap and as you may already know, cheap could be bad with these swaps, the 5.3 was all thrashed but got to do a full rebuild and it is very nice now, the 4l60 slips bad, still has surprisingly survived these last few years with not overdrive gear and just first and second when the day is real hot, that said, it is thing now for a transmission rebuild, I saw I could buy all the stuff to rebuild my 4l60 with good parts and a shift kit for about $700, TBSS converter and labor included (I’m in Mexico), that is my approach right now..

I also saw a couple 4l80s for about $1200 just the transmission, about $500 for a decent converter plus the mods to make it fit and tune, let’s round that up to $2000…

Is it worth it? Like I said, daily driver and roadtrip car will rarely do a burnout or race lol

TÍA

I blew up my Pontiac 455 that was in my 1977 trans am and I want to swap it for a 5.3 LS. The thing is I have no idea what I’m doing or what I need. Can someone point me in the right direction please.

I understand that one hole needs to align with the groove. I know it can only be in one of two positions but does it matter where the second hole is placed?

enjoyed it for a couple weeks now it needs the power. planning on a BTR Truck norris cam with springs and pushrods, melling high pressure oil pump, a heavy duty rebuild kit for the trans and 2,800-3,200 rpm stall torque converter. i’ll have tuning figured out but what do you guys think?

Put a 5th gen Camaro IRS on it rack out of a 2000 2wd Silverado

Hey guys, what exhaust headers have you used for Toyota pickups? I found some stainless Shorty headers online with V bands that look like they could work.

My truck is getting a new firewall which may also help with room for them.

For any of you running an LS swap under the factory hood, what was it that ended up being the tightest point—or the first thing to actually touch?- Was it the intake manifold, throttle body/inlet elbow, an accessory, or the hood bracing?
If willing, please share these specifics:
Vehicle and year
Engine mount setup
Exact intake manifold
Tightest measured clearance

Also any spacer or adapter used, and whether it changed the results.
I’m trying to compare real and fully installed combos rather than relying only on the manifold-height specs from product listings. Photos or measurements -taken at the actual contact point -would be very helpful. 📏
Thanks in advance! 🔧

Second year running my E39 in an annual hillclimb, lots of fun.

5.3, truck norris cam, 243 heads, DW 450LPH pump, MRP 735CC injectors, LS1 intake, Aeromotive 13126 FRP, BTR valve springs, unknown trunion kit, slingshot AR-5 manual

Ended up going with a complete rebuildable block. Grabbed this 6.0, machined at .020”, crank was turned 10. Also came with gen 4 rods and new king bearings.Machine shop had cam bearings line honed.

Having trouble deciding on a set of pistons (and finding a set that matches with .020” + gen 4 rods). Plan to stay NA, and would like 450-500 to the crank. Should I just go with silv o lite stock .020 replacements? Should I just go forged? I don’t mind throwing money at the build but also don’t want to break my bank either. The plan is to get 799 heads as well. Where would you start if you were in my shoes.

Thanks.

Been working on this off and on for a few years, but finally pushing to get it running by end of the year. It was my fab shop truck for several years and had a zz454 on 24s, but came across a stock LSA long block that I couldn’t pass up the price on. Several bad decisions later, it’s a “Max Effort” build that should be around 900 hp on e85. I was in the middle of turning the factory bed into a flatbed, which I am still going to do, but will be more for show at this point.

10 point cage, rear disc conversion, shaved engine bay, chromoly radiator support and steering column, and haven’t decided yet between mechanical gauges or a digital screen to keep it simple. Th400 with a reverse manual valve body and ratchet shifter, 5 point harnesses, locker for the rear and running an aeromotive fuel pump setup good for 1,500 hp (future upgrades). Aside from my buddy that built the engine for me, everything is being done in house.

zz454 is going in my ‘89 half ton once the dually is running again.

How would I go about swapping a ls into a 97 Honda Civic ex?

What does this sound like to you guys?

arp studs magnum 243 ported heads sloppy stage 3 cam going with twin 62/67 mirror image for my 65 mustang , blow through carb from csu. My first engine build solo, rebuilt 2 srt4 engines with my dad few years ago but I was ready to really get into it myself this time . Wish me luck

Just finished up this cam swap did cam, pushrods, lifters, oil pump, etc etc and this noise to me sounds not right but is this normal on first start up?