5.3 or 6.0
Thread Starter
Staging Lane
Joined: Sep 2005
Posts: 68
Likes: 0
From: columbus ga.
5.3 or 6.0 Hey everyone, I have a buddy that tells me I need to skip the 5.3 and go 6.0 so that I can run the LS3 heads. He says that I will never make 700whp with a street able turbo 5.3. I don't believe this is true. I told him that a 5.3 with rods and pistons and heads and cam will make this no problem and probably a lot more. What do you guys think, am I wrong is the expense of the 6.0 and LS3 heads really worth it? Thanks
TECH Fanatic
Joined: Jan 2022
Posts: 1,034
Likes: 468
From: Seattle
You will absolutely be able to make 700whp with cathedral heads if you have the right turbo. You could make 700whp with a 4.8L and cathedral heads if you wanted to. Show him any number of Richard Holdners videos where he does just that. In those equations the turbo being able to support the HP number is the key.
Trending Topics
TECH Fanatic
Joined: Dec 2019
Posts: 1,129
Likes: 478
I did about 900 wheel on pump/meth on a stock 5.3 with a billet S475 with a small cam and it drove great.
I did 900 wheel on a stock 4.8 with a larger cam, some China turbos and E85, surprisingly on less boost than it took me to do it with the 5.3. Also a street car.
The right combo and tune, you could build a daily driver with a 5.3 well above 700 wheel.
I did 900 wheel on a stock 4.8 with a larger cam, some China turbos and E85, surprisingly on less boost than it took me to do it with the 5.3. Also a street car.
The right combo and tune, you could build a daily driver with a 5.3 well above 700 wheel.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo Thread Starter
Staging Lane
Joined: Sep 2005
Posts: 68
Likes: 0
From: columbus ga.
Thanks guys I got a 5.3 for $150, thats why I want to build it. The 6.0’s are way more expensive then you've got to get the ls3 heads he wants to use. I will be running pump 93 and don't mind running meth to get where I need to be.
There's been videos on youtube where a tuner took a 200k mile 4.8, pulled it down, cleaned it up, put all the stock components back in (gapped rings, I'm sure, but still the stock rings/pistons/rods/crank), put a cam and twin turbos on it and dyno'd at over 900 rwhp. Your friend sounds like an old school thinking guy.