Table of Contents
How much power can a 4.8 make?
Dyno tested, and bone-stock internally, with headers a single-plane intake and 650 cfm carb, the 4.8L LR4 made 333 hp at 5,400 rpm and just over 343 lb-ft of torque at 4,700 rpm. With the truck EFI intake and GM throttle body we typically see just over 350 hp.
Is the 4.8 LS a good motor?
However, I consider the 4.8L to actually be more reliable than the 5.3L as the 5.3’s all had Active Fuel Management (AFM) which cause a lot of excessive fuel consumption issues. Overall, the engine blocks are considered bulletproof and are very strong.
How much HP does a stock 4.8 have?
Equipped with the stock heads, cam, and truck intake, the 4.8L produced 336 hp at 5,900 rpm and 347 lb-ft of torque at 4,900 rpm. Torque production exceeded 300 lb-ft from 3,200 rpm (the start of the test) to 5,800 rpm. Owners of the original 283 small-block will envy this type of torque curve.
How much HP does a turbo add to a 4.8 Vortec?
Equipped with the new TFS heads, the power output of the turbo 4.8L jumped to 574 hp at 5,800 rpm and 566 lb-ft of torque at 4,900 rpm. As much as we liked the peak power gains, we loved the fact that the head swap improved the power output throughout the entire powerband—a sign of a well-designed modification.
Is a 4.8 a 327?
Given the bore and stroke of each, a better comparison might be the 327 and larger 350, as the 4.8L and 5.3L share the same bore size of 3.78 inches while the 4.8L makes due with a shorter 3.267-inch stroke (down from the typical LS stroke of 3.622 inches).
How much can you bore a 4.8 LS?
All dimensions in inches unless otherwise noted. Notes: Some rare 4.8L/5.3L iron truck blocks can be bored out to 4.00-inch (see text for details).
How long do 4.8 engines last?
With regular oil changes and proper maintenance, these engines can serve you for up to 250,000 to 300,000 miles.
Is a 4.8 and 5.3 same block?
It’s difficult to identify the 5.3L and 4.8L because the blocks are the same; the difference is inside. The 4.8L uses an 83mm stroke and the 5.3L’s is 92mm (the same stroke as a 5.7L, 6.0L, and 6.2L).
What is the fastest LS engine?
At Speed Week 2017, George Poteet and the Speed Demon team used that LS to run 428.784mph and this year, with a better racing surface, it ran 448.508mph, ensuring that it’s the fastest LS engine in the world.
How much can a 4.8 V8 tow?
the 4.8 is adequate to tow what you are towing- make sure you engage the tow haul mode so the transmission does not try to go into overdrive unless it is safe. it is rated for 4600 lbs.
Can a 4.8 be bored?
Notes: Some rare 4.8L/5.3L iron truck blocks can be bored out to 4.00-inch (see text for details). LS4: Modified block for transverse engine installations only.
How many miles will a Chevy 4.8 last?
How do you tell the difference between a 4.8 and a 5.3 LS?
If you see a flat-top piston, you’ve either got yourself a garden-variety 4.8L or a higher-output, Gen IV 5.3L. Time to check the crank. If you see casting number 12553482, you’ve got a 4.8L. The 5.3L should have the same crank casting number as other 3.62-stroke LS engines—12552216.
What heads came on 4.8 LS?
The LR4 is a 4.8L iron block truck engine that was introduced in 1999. Along with the LM7 and LQ4, they were the first LS truck engines….LR4 Cylinder Heads.
|LR4 Cylinder Head Specs
|Exhaust Port Shape
|Exhaust Runner Volume
|Intake Valve Diameter
|Exhaust Valve Diameter
What LS motor is best for turbo?
“All of the engines are great with a turbo, but the 5.3 and 6.0-liter engines are the most popular. The 5.3 is the cheapest and easiest to find, so you’ll see a lot of people use it. With a 5.3 and 6.0, you can see up to 1,000 horsepower on a stock motor if you push them.
How much HP does a Turbo add to a car?
Run on the dyno with the Summit turbo, the boosted 4.8L produced 576 hp near 7 psi with a soft tune, but we eventually ramped this up to 828 hp and 762 ft.-lbs. of torque at 16 psi.
Can you put a turbo on a stock LS engine?
Please try again later. When it comes to LS engines, it seems like “junkyard” and “stock bottom-end” builds are all the rage. And while it’s true that you can slap a turbo on a stock LS and make stupid power, it’s usually a ticking time bomb.
What does a single turbo kit look like?
The single-turbo kit revolved around these turbo manifolds supplied by DNA Motoring. The manifolds featured mandrel bends, stainless steel construction, and V-band exit flanges. 3. We welded up this custom Y-pipe to channel the exhaust gases to the T4 turbo flange.
What kind of Turbo does Summit Racing use?
Boost was supplied by the S475 turbo from Summit Racing. The twin-scroll, T6 turbo featured a 75-mm compressor (inducer) and an 88-mm turbine (exducer). The turbo also featured a 1.32-A/R ratio turbine housing and the ability to support near 1,000 hp on the right application.