LS2 Swap Success and Dyno tuned

I've had the truck up and running for awhile, but have been having problems getting the tune nailed down in HP Tuners. Finally decided to take the truck in and have a local company that has done a lot of work with the LS2 tune it. Ended up putting down 330rwhp on a Mustang dyno. There is an 8 to 12% correction factor between Mustang dyno to Dynojet. Being on the conservative side with 8% would be about 350rwhp on a dynojet. The truck is very fast for being a completely stock LS2 and running the older 6.0L truck intake and throttle body. I do have a trailblazer torque converter installed with a stall of 2600rpm. We took out most of the torque management and raised the shift point to 6180rpm. Everything works on the truck besides the fuel level gauge. Only custom part that was made for the entire swap were the engine mount adaptors. Everything else was off the shelf parts from either a NBS or OBS truck. ABS, Speedo, Cruise control etc all work. No need for a converter for the tach, I was able to adjust the tach resolution in HP tuners and got it reading within 50rpm. Truck has ZERO SES codes. Just had to disable VATs on the PCM.

I'm running an '05 LS2, '05 4l65e out of an escalade, and a t-case out of a '04 NBS truck. Once I measured up the engine mount adaptors, we were able to use the stock rear driveshaft, and the front driveshaft from a NBS truck. Also used stock tranny lines, 6.0L exhaust manifolds, 6.0L cat pipes to a Flowmaster Y with 3.5" mandrel bent exhaust out from that.

We used a 5.3L engine harness and PCM from a NBS truck and mated it to the OBS fuse panel and connectors coming out of the firewall. Wiring was by far the most tedious part of the project, but really wasnt all that bad.

For the fuel pump, I bought a Racetronix kit for a '99+ F-Body and the pump dropped right in. I had to buy some intank fuel hose to connect the pump to the plastic fuel bucket fitting, but other than that, the Racetronix kit had everything needed for the install. Fuel system should easily support 600rwhp, closer to 700rwhp if we use a voltage booster. It also retains the stock Venturi feed system so no worries about running the pump dry when launching hard. I'm running the corvette fuel filter/regulator in place of the stock filter.

We ran several 1/4 Mile simulators on the dyno, and the truck is running 14.2 @ 99mph. We had problems spinning the tires on the dyno also, so that wasn't helping the 1/4 mile times. Once the track opens up, I plan on seeing how accurate that is. From a standing start while brake torqueing, the truck will spin all 4 wheels for a couple of feet. I plan to eventually get some sort of headers for the truck, possibly a cam, a better intake, and will more than likely spray it at some point also. I also have e-fans and an a/c compressor to install yet. Should get those on in the next week or so hopefully.

I'll try and get some pics up in the next day or two.

Sounds like you did a great job! How about some pics? What year model is the truck?

<div class='quotetop'>QUOTE(NITROUS &#064; Apr 6 2006, 04&#58;41 AM) [snapback]49451[/snapback]</div>

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Sounds like you did a great job&#33; How about some pics? What year model is the truck?
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I&#39;ll try and get some pics up later today.

It&#39;s a white &#39;98 Extended cab step side.

Sounds awesome. I&#39;d try the Hooker NBS headers and see if they&#39;ll fit in there. The way they run their pipes grouped together just might work in the OBS truck. If they don&#39;t, you have a set of LTs for your NBS truck. :thumb:

That&#39;s sounds awesome man. Where were you when I was trying to hook up my factory guages? Oh well it worked out pretty good the way I did it, just cost me an additional 500 bones. Yeah I want to see some pics too. :thumb:

sounds like a good combo you got there.
y not run the ls2 or ls6 intake?

<div class='quotetop'>QUOTE(bluecajun5.3 &#064; Apr 6 2006, 03&#58;14 PM) [snapback]49486[/snapback]</div>

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sounds like a good combo you got there.
y not run the ls2 or ls6 intake?
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I had the old 6.0L intake in my garage so I just used it. When I upgrade my Camaro to a FAST intake, I&#39;ll probably put that LS2 intake on the truck.

Finally got a few pics of the swap: www.eadperformance.com/ls2truck/

We just got a ton of rain today, and I live on a dirt road so the rest of the truck is very dirty. I&#39;ll try and get some more pics once everything gets washed.

Ha Ha... wasn&#39;t gonna say anything about dirt, but nice swap.

Nice job&#33; I like the green wire wraped around the coolant overflow tank hose&#33; J/K I bet it hauls&#33;

Looks good plus you got me beat by 100 HP. What are you going to do for A/C? 2-80? 2 windows down and 80 mph? :smile:

atta boy on your hard work. I bet that thing will run like a scalded dog&#33; Get rid of that stock intake tube ASAP. :thumb:

Great job&#33; I bet you love the way it runs&#33;

<div class='quotetop'>QUOTE(RedHeartbeat &#064; Apr 12 2006, 07&#58;28 PM) [snapback]49973[/snapback]</div>

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Looks good plus you got me beat by 100 HP. What are you going to do for A/C? 2-80? 2 windows down and 80 mph? :smile:
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Thanks for the comments everyone.


I picked up an A/C Compressor from a &#39;93 Bravada. We&#39;ll be fabbing up some brackets in the next week or two, but first I need to get the electric fans installed and a new intake setup as the A/C will interfere with the intake tube.

<div class='quotetop'>QUOTE(Tim Z &#064; Apr 12 2006, 08&#58;06 PM) [snapback]49985[/snapback]</div>

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atta boy on your hard work. I bet that thing will run like a scalded dog&#33; Get rid of that stock intake tube ASAP. :thumb:
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That intake tube was the only thing we could get to fit with the fan being so close to the motor. Once the efans are installed, I&#39;ll be making some sort of cold air box with nicer aluminum tubing to the throttle body.

<div class='quotetop'>QUOTE(GMCwantsLS1 &#064; Apr 12 2006, 06&#58;53 PM) [snapback]49970[/snapback]</div>

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Nice job&#33; I like the green wire wraped around the coolant overflow tank hose&#33; J/K I bet it hauls&#33;
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Yea, gotta take care of the green wire. Wasn&#39;t sure if we would be needing it for anything or not so we didnt tuck it into the rest of the wiring until we were sure.

The truck hauls for being a stock motor. Quite a bit faster than my friends stock Silverado SS, but a lot of that is because of the weight of the OBS and the tune on the LS2.

I bet that STS setup is fast.

Here&#39;s a pic of what the engine looked like before we started the swap

[attachmentid=526]

The truck it came out of obviously burned to the ground for the most part. I took an hour or two to completely wire wheel the motor with an angle grinder to a very nice polished look, put new valve covers on it, and a new front timing cover and that was it. Motor looked better than new when I was done with it.

holy shit that things fuuuuuucked up looks like brand new now compared to that picture lol

Wow what a restoration on that burned up engine. The STS works great with a best so far of 12.7 @ 105MPH. It has been retuned since then and will see some track time as well as a 6 hour drive this friday.

damn, that was probably an awesome deal on a torched engine.

Holy BBQ Batman&#33; Excellent work on bringing that crispy critter back to life&#33; :thumb:

<div class='quotetop'>QUOTE(RedHeartbeat &#064; Apr 13 2006, 08&#58;48 AM) [snapback]50025[/snapback]</div>

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damn, that was probably an awesome deal on a torched engine.
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Picked up the engine for &#036;1800. Unknown mileage, but its from a 2005 SSR so I&#39;m guessing very low mileage. The junkyard has had the car for awhile also. We checked out the internals before we put it in the truck, and it looked brand new inside. I&#39;m guessing less than 5,000 miles on the motor. At the very max, 10,000 miles.

I was very surprised at how clean the motor came.

Wow, they started putting the LS2 in the SSR? Last I heard they were sticking with the aluminum 5.3L.

<div class='quotetop'>QUOTE(RedHeartbeat &#064; Apr 13 2006, 07&#58;58 PM) [snapback]50051[/snapback]</div>

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Wow, they started putting the LS2 in the SSR? Last I heard they were sticking with the aluminum 5.3L.
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Yea, the &#39;05 and &#39;06 SSRs got the LS2 and option of a 6 speed manual.

Cool, Did you leave the new 243 heads stock? I envy you guys with your swaps complete&#33; I oughta sell mine and buy a new Z06. There&#39;s one at the Chevy dealership in La Port. Nah, I&#39;ll stick with the 5000# truck and a 150 HP Ls1 like RHB. LOL

Watch it Bucko. :nono: :rude: I&#39;m still working on it. Got it mostly wired now. All I have to do it wire up the juice and I&#39;ll be gunning for you and that one year WIP. :lol:

I think it&#39;ll be a 2 year WIP before it&#39;s all over with&#33;&#33; :cry:

how did you make the stock guages work

<div class='quotetop'>QUOTE(chencho &#064; Jun 13 2006, 04&#58;34 PM) [snapback]55376[/snapback]</div>

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how did you make the stock guages work
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Everything worked by just hooking up the wires besides the tach and fuel guage. Fuel gauge still is not working. Tach was fixed with HP Tuners by changing the resolution. You can also by a cheap &#036;30 converter from Bakers Electronics that will convert the tach signal to something the gauge can read.