Well im deffinately gonna boost the 4.8 I fully agree with you guys, a turbo 6.0 would be alot better than a turbo 4.8. Dont really see why peoplewould think the other way around lol.... I think im gonna turbo it and run it till it breaks like another person said, and in the process have another something on an engine stand waiting I guess I could see why people would wanna do a 4.8 swap though, it is pretty damn cheap for them

 

So when you do your turbo build, make sure to have a build thread Because I am thinking about doing a similar build on my ECSB

 

For sure but like I said earlier, it will be in about 6 months because my trucks still in NC, while I just got moved to the middle of the desert 29 palms lol

 

i sold my 6.0 for 1k plus a 4.8 lol and i dont regret it for nothing

 

Please rephrase; are you saying that you regret it for a reason or you don't regret it for anything? Just want to make sure I understand you properly

 

We're just getting ready to start a 4.8L TT too. That recent Hot Rod article certainly got a lot of people's attention-- that the "weak sister" 4.8 might end up being the most desirable performance engine in the after-market.

There are a bunch of attributes that make it more interesting for boost:
1) Iron block, but thicker walls than any LSx or LQ4/9 motor-- excepting the 5.3 that uses the same block
2) Smaller bore also implies lighter pistons
3) Shorter crank means less stress at the peak load parts of a combustion cycle.
4) Near-ideal rod ratio for high RPM, boosted applications.

If you read Corky Bell's book on Turbo'ing engines, it's eye-opening that the 'peak stress load' isn't when you'd think it is--- and the boost (and back-pressure from the exhaust side) actually REDUCES some key stresses. We kinda came to the conclusion that the 4.8 is the dream date for a boosted LQ/LS motor.

We'll post a build thread once we get started. We are looking at using a pair of GT2871s.

 

keep the 4.8 trust me you wont regret it we have done 2 4.8 turbo builds with a 76mm turbo and they have turned out better than everyone had expected here are the links to the 4.8 builds

https://www.performancetrucks.net/fo...me-out-485875/

https://www.performancetrucks.net/fo...umbers-486333/

https://www.performancetrucks.net/fo...-turbo-481155/

https://www.performancetrucks.net/fo...-truck-486408/

 

By keeping the shorter stroke 4.8, you can create more power in the high rpms and keep the torque down(relatively that is), which also helps contribute to the less stress factor.

I don't think you will regret going turbo on either, but I feel the same as a lot of guys and think the 4.8 is the way to go, that's why I chose it for my project car....

John

 

Whoa, those videos are incredible. What kind of boost control are you running?

I love the 108 in the 1/8th run. Wow.

 

no boost controler here


we are barely starting to experiment with a 5.3 and see how much we can get out of it ill be doing a threat once we have results from it