Amazing swap

[OVERKILL]

Originally Posted By: Char Baby
My buddy was telling me of a car or truck magazine article that he was reading some time last year.

These guys in the article were looking for a newish GM Truck engine in the bone yard, CHEAP! ... Found one from a recent model crashed Silverado and they built/modified it up pretty good and dyno'd the engine after the build. It produced close to 1000 hp.

To make a long story short, and I can't do the story any justice, these guys building the engine noticed some #'s on the crankshaft and had somehow detremined that the engine wasn't the 5.3L they thought it was. It was a 4.8L. This made the story more exciting!!!

I don't remember what vehicle these guys put the engine in nor do I remember much of the whole story but, It'd sure be an interesting read!


I think you are talking about the Hot Rod article where they took a 4.8L and attempted to see if they could break it. They made something like 900HP with it and it stayed together.

 

[OVERKILL]

Originally Posted By: cchase
Did I call it or what? I knew you'd be here, overkill!

Yeah, but I'm not knocking it or saying they should have used a Ford engine, LOL!

 

[The_Eric]

Originally Posted By: OVERK1LL
Originally Posted By: Char Baby
My buddy was telling me of a car or truck magazine article that he was reading some time last year.

These guys in the article were looking for a newish GM Truck engine in the bone yard, CHEAP! ... Found one from a recent model crashed Silverado and they built/modified it up pretty good and dyno'd the engine after the build. It produced close to 1000 hp.

To make a long story short, and I can't do the story any justice, these guys building the engine noticed some #'s on the crankshaft and had somehow detremined that the engine wasn't the 5.3L they thought it was. It was a 4.8L. This made the story more exciting!!!

I don't remember what vehicle these guys put the engine in nor do I remember much of the whole story but, It'd sure be an interesting read!


I think you are talking about the Hot Rod article where they took a 4.8L and attempted to see if they could break it. They made something like 900HP 1200HP with it and it stayed together.


There, I fixed it for ya...

 

[OVERKILL]

Originally Posted By: The_Eric
Originally Posted By: OVERK1LL
Originally Posted By: Char Baby
My buddy was telling me of a car or truck magazine article that he was reading some time last year.

These guys in the article were looking for a newish GM Truck engine in the bone yard, CHEAP! ... Found one from a recent model crashed Silverado and they built/modified it up pretty good and dyno'd the engine after the build. It produced close to 1000 hp.

To make a long story short, and I can't do the story any justice, these guys building the engine noticed some #'s on the crankshaft and had somehow detremined that the engine wasn't the 5.3L they thought it was. It was a 4.8L. This made the story more exciting!!!

I don't remember what vehicle these guys put the engine in nor do I remember much of the whole story but, It'd sure be an interesting read!


I think you are talking about the Hot Rod article where they took a 4.8L and attempted to see if they could break it. They made something like 900HP 1200HP with it and it stayed together.


There, I fixed it for ya...


Couldn't remember the details. Just found this:

Quote:
4.8
118 octane race gas
Twin 76mm eBay turbos
Cam
Ported heads
Arp head studs
Fast Intake and throttle body
26.8 psi for 1,203 hp!!! Still didnt go boom...


Apparently they increased the ring-gap as well.

Impressive nonetheless, though I wonder how long it would hold up in a setting that isn't dyno?

We also have to keep in mind these are engine dyno numbers, not SAE NET.

 

[CharBaby]

Ah, you folks know the article! I didn't read it so, I don't have any of the actual details

I'm glad that I brought it up.

 

[Chris142]

If that Sportage is anything like my moms he did the swap just to get away from the constant electrical problems these cars have under the hood

 

[The_Eric]

Originally Posted By: OVERK1LL
Originally Posted By: The_Eric
Originally Posted By: OVERK1LL
Originally Posted By: Char Baby
My buddy was telling me of a car or truck magazine article that he was reading some time last year.

These guys in the article were looking for a newish GM Truck engine in the bone yard, CHEAP! ... Found one from a recent model crashed Silverado and they built/modified it up pretty good and dyno'd the engine after the build. It produced close to 1000 hp.

To make a long story short, and I can't do the story any justice, these guys building the engine noticed some #'s on the crankshaft and had somehow detremined that the engine wasn't the 5.3L they thought it was. It was a 4.8L. This made the story more exciting!!!

I don't remember what vehicle these guys put the engine in nor do I remember much of the whole story but, It'd sure be an interesting read!


I think you are talking about the Hot Rod article where they took a 4.8L and attempted to see if they could break it. They made something like 900HP 1200HP with it and it stayed together.


There, I fixed it for ya...


Couldn't remember the details. Just found this:

Quote:
4.8
118 octane race gas
Twin 76mm eBay turbos
Cam
Ported heads
Arp head studs
Fast Intake and throttle body
26.8 psi for 1,203 hp!!! Still didnt go boom...


Apparently they increased the ring-gap as well.

Impressive nonetheless, though I wonder how long it would hold up in a setting that isn't dyno?

We also have to keep in mind these are engine dyno numbers, not SAE NET.



Dunno? They opined that it would last all season at those power levels, because they made over 60 pulls. I'd imagine that if they turned the wick down a bit and ran a conservative tune to avoid detonation, then I'm sure it'd live a long and happy life.

 

[OVERKILL]

Originally Posted By: The_Eric



Dunno? They opined that it would last all season at those power levels, because they made over 60 pulls. I'd imagine that if they turned the wick down a bit and ran a conservative tune to avoid detonation, then I'm sure it'd live a long and happy life.


Quite right. And it could be tuned to run on 93 octane (this was 118 octane race gas) as well, which would bring the power level down significantly.

 

[Jarlaxle]

Originally Posted By: Char Baby
My buddy was telling me of a car or truck magazine article that he was reading some time last year.

These guys in the article were looking for a newish GM Truck engine in the bone yard, CHEAP! ... Found one from a recent model crashed Silverado and they built/modified it up pretty good and dyno'd the engine after the build. It produced close to 1000 hp.

To make a long story short, and I can't do the story any justice, these guys building the engine noticed some #'s on the crankshaft and had somehow detremined that the engine wasn't the 5.3L they thought it was. It was a 4.8L. This made the story more exciting!!!

I don't remember what vehicle these guys put the engine in nor do I remember much of the whole story but, It'd sure be an interesting read!


That's the one I linked! They were trying to find the limits of the LS...and discovered that 1200HP isn't it! IIRC, it was a van engine. More than 4hp/ci from a 100,000+ mile junkyard shortblock.

 

[Jarlaxle]

Originally Posted By: OVERK1LL
Originally Posted By: The_Eric



Dunno? They opined that it would last all season at those power levels, because they made over 60 pulls. I'd imagine that if they turned the wick down a bit and ran a conservative tune to avoid detonation, then I'm sure it'd live a long and happy life.


Quite right. And it could be tuned to run on 93 octane (this was 118 octane race gas) as well, which would bring the power level down significantly.


Wonder what it could do running E85...

 

[OVERKILL]

Originally Posted By: Jarlaxle
Originally Posted By: OVERK1LL
Originally Posted By: The_Eric



Dunno? They opined that it would last all season at those power levels, because they made over 60 pulls. I'd imagine that if they turned the wick down a bit and ran a conservative tune to avoid detonation, then I'm sure it'd live a long and happy life.


Quite right. And it could be tuned to run on 93 octane (this was 118 octane race gas) as well, which would bring the power level down significantly.


Wonder what it could do running E85...


Good question! They should have tried that IMHO!

Also, if they really wanted it to fail, they could have added some detonation in there, LOL!

 

[SteveSRT8]

It would be a monster!

Like Overkill I am a fan of the late LS7, it's just the most compact little package ever! When you see one on the stand you just won't believe the little Mouse is such a MONSTER.

I have a 6.0 LS truck long block (iron) on the stand right now, and the more I look at my 05 Silverado 5.3 the more I'm thinking transplant!