After installation of the BTR/LJMS Stage 2 turbo cam, the power output of the turbo 5.3L jumped from a hair above 600hp to 730hp at 6,600 rpm and 649 lb-ft of torque at 4,900 rpm. The cam improved the power output by nearly 130hp, with gains exceeding 150hp higher in the rev range.
Yes, you can make big power by throwing boost at a stock LS engine, however, if you want the horsepower party to last for a long time you’ll need to make some changes to the engine. The stock components just can’t deal with the stress that forced induction can put on them when you really start to crank up the boost.
With a 5.3 and 6.0, you can see up to 1,000 horsepower on a stock motor if you push them. There are some who have made more, but the gaskets and internal parts are going to struggle past that level to survive.” The rotating assembly should ideally be rated for higher horsepower and RPM levels than you plan on running.
Put a 3/4 drop with 22″, just bought the K&N FIPK for it yesterday, and am pumped to throw it on. Thanks.:bowtie: well, it has about 270 HP @ 5200 RPM with bolt ons you can get more hp then a stock 5.3l which has about 285 HP @ 5200 RPM.
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.
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.
How much horsepower can you get out of a 4.8 L?
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.
Is a 4.8 L an LS engine?
The 4.8L LS Engine Family With the smallest displacement of all the engines in the LS lineage, the 4.8L is probably the closest you’ll get to an “under-the-radar” LS. But that’s good news for you, because they’re often easy to come by in junkyards and relatively cheap.
How much power can a stock 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.
How can I get more horsepower out of my 4.8 Vortec?
The entry-level V8 is a 4.8-liter Vortec that creates 295 horsepower and 305 pound-feet of torque.
What Is a Stage 2 Turbo CAM?
The stage 2 has been proven to be an excellent camshaft choice for cathedral port headed 5.3’s and 6.0’s utilizing a wide range of different turbos. It works well with units as small as a Precision 7275, and as big as the 88mm S400’s from Borg warner. This camshaft is often imitated but never duplicated.
What does a BTR Stage 3 Cam do?
The BTR Stage 3 NA Camshaft (Ls1/Ls2/Ls6) is the go to for people desiring a rough & choppy idle matched with a powerband that will stretch into the 450+ whp range. To achieve these results, you will need to pair this cam with the proper supporting mods.
What Is a Stage 2 Turbo cam?
The stage 2 has been proven to be an excellent camshaft choice for cathedral port headed 5.3’s and 6.0’s utilizing a wide range of different turbos. It works well with units as small as a Precision 7275, and as big as the 88mm S400’s from Borg warner. This camshaft is often imitated but never duplicated.
How much is a BTR Stage 2 cam?
Registered. Running a stage 2 is better than a stage 3 on a supercharger set up because of the overlap in the cam. It will let out the vacuum pressure and you end up loosing boost. the valves don’t close fast enough.
Who makes BTR Cam?
The BTR Stage 3 NA Camshaft (Ls1/Ls2/Ls6) is the go to for people desiring a rough & choppy idle matched with a powerband that will stretch into the 450+ whp range. To achieve these results, you will need to pair this cam with the proper supporting mods.
How much HP does a stage 4 cam add?
Equipped with the Summit Stage-4 cam, the peak power output jumped to 568 hp, but peak torque dropped slightly to 510 lb-ft. If you look at the curves, the wilder cam offered more power above 5,500 rpm, but it lost out to the milder Comp cam below that point.
More Answers On how much boost can a stock 4.8 handle
The Easy Way to Make 820+ HP in a 4.8L Junkyard Pull
Run in this trim on the dyno, the little 4.8L produced peak numbers of 409 hp at 6,600 rpm and 367 ft.-lbs. of torque. Now it was time for boost! 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).
4.8 Boost, Timing – HPTuners
Ive got a 4.8 that I just installed headstuds and a ls6 cam, other than that motor is stock. With the head studs I upped my boost level from ~ 7lbs at 22* of timing to ~ 18-19lbs and Im hearing a tad of knock on only 9* of timing.
650-HP 4.8l LS With a Single-Turbo Setup – Mini Mouse, Part 3
Running 7 psi of boost, an air/fuel ratio of 11.8:1, and 24 degrees of total timing (on race fuel), the intercooled turbo 4.8L produced 524 hp at 5,800 rpm and 529 lb-ft of torque at 4,700 rpm. A…
LR4 4.8L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam …
The 4.8L engine is also known as the Vortec 4800. The engine specs and information here is for a stock LR4 engine. These engines are strong and durable. Many people use them with boost or nitrous. With upgraded internals, the blocks can handle over 1,000 hp. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on …
A Look At The World’s Quickest Stock-Bottom-End 4.8-Liter LS Engine
Note the brief journey to 41.1psi of boost and peak RPM of 8,342 — from a stock 4.8L LR4 short-block, that has the same bearings and piston ring gaps as when it left the factory. Article Sources About the author Greg has spent seventeen years and counting in automotive publishing, with most of his work having a very technical focus.
Stock 4.8 horsepower?? | GMC Truck Forum
After doing these simple mods you be looking at over 300hp/300tq (Assuming you have a 5.3L expect about 30 less for a 4.8). With that said you need to start looking at new transmission parts. You can look at a Trans-go Shift kit and Corvette servos to tie you over for now. Anything further is beyond my level of knowledge.
how much boost is safe on a stock LS2 engine (upper and lower)?
There’s an 5.3 on ls1tech that’s run 100k miles on 14psi and his truck was not babied, it’s constantly towing and in boost. A failed lifter after 100k miles on boost with max boost 14 is testament to Lsx motors. Hot Rod magazine had a 4.8 on 26psi stock and pulled numerous pulls with no failure. When they hit 27psi the ignition could not keep up.
psi boost for horsepower target calculator – racingcalcs
This calculates the boost (psi) to achieve a nominated horsepower target based on your engines specifications and maximum rpm. Great when planning a new turbo kit or intercooler to see if it can achieve your goals. **check out our boost temperature calculator or our quarter mile calculator
Best engines to run high boost with stock internals? : cars
To add on to this, here’s the Hot Rod article where they boost a stock junkyard 4.8 up to 1200 with no issues. … Any Nissan RB/SR or Toyota JZ can handle boost well. Lesser known are Toyota AR/AZ and 3S/S series engines. VQ and Mitsubishi 6G72. Ive heard of 25psi on a 22R but its still am mystery. 1. Share.
How much boost can a 4.3 handle – S-10 Forum
You can pretty easily run 15-20 PSI on the engine. That seems alittle high for a stock motor! K King_Ice_Flash2 Will work for turbo parts Joined Jan 18, 2007 2,789 Posts #6 · Jan 20, 2009 Try reading some of the posts in the “BLOWERS AND BOTTLES” section. Some members have run more than 20 on a stock engine, and it lasted quite a long time. supra88
whats the max boost a stock SR20DET block can handle?
The stock engine, without cracking the valvecover, should hold around 400-410whp with the proper upgrades to fuel/turbo, etc… If you put a metal head gasket and head studs, you should be able to crank out 550whp or so, if it’s tuned correctly. However, 400whp is plenty enough for a daily driven FWD car IMO. Travis Sneakers O’Toole RIP Bob
Turbo Fun: Boost Basics For The LS-Based Engine Platform
Aug 25, 2020For most street applications and engines in the 4.8-6.0-liter size range, the 7675-7875 turbos work very well. Their size creates a package that allows the car or truck to retain as many accessories as possible up to the 750-850 rear wheel horsepower zone,” Ojczyk says. Fortifying The Engine For Boost
What is the max lift on a stock 4.8 vavle spring – ASAP
Pragueress. Bachelor’s Degree. 286 satisfied customers. My 2005 Silverado extra cab Z71 4×4 w/ 6 lift..doors. I am seriously thinking of trading my 2005 Silverado extra cab Z71 4×4 w/ 6″ lift, vortec 5300, nice truck but I need the 4 doors, and I like the 08, 09 bigger Silverado.
Make 800 HP With a Boosted 5.3 – MotorTrend
Run at a peak boost pressure of 9.6 psi, the turbocharged 5.3L produced 532 hp at 5,500 rpm and 555 lb-ft of torque at 4,700 rpm. We then applied the same turbo system (without changing the waste…
How much boost can an LS7 (or any Chevy small block for that … – reddit
They made 1200hp on stock internals. Later they found out it wasnt a 5.3, but a 4.8. https://www.hotrod.com/articles/hrdp-1109-stock-gm-ls-engine-big-bang-theory/ 18 level 2 Comment deleted by user · 2 yr. ago Continue this thread level 1 TeamJim · 2 yr. ago There’s no one number. Depends on too many variables.
Advice: 5.3L stock bottom for high boost (20 psi) – LS1GTO Forums
To a boost level of say 20 psi. This would be somewhere in the ballpark of 110 crank hp lost to just driving the procharger. Call it ~100 rwhp. So, to get 700 rwhp out of the motor on a procharger, the engine will be stressed like it is running 800 rwhp out of a turbo setup.
Sloppy Mechanics Make 1,076 Horsepower With Stock Bottom End LQ4
While the pill he used is rated for 50 horsepower, due to the affects of the boost and intercooler, he was rewarded with more than 90 horsepower at the wheel. On his next run, the truck put down 820 rwhp maxing out the boost controller at 23 psi.
Maximum Horsepower from stock LS6 when boosted. – Corvette Z06 Forum
Driveability could be an issue for you with a max effort NA build. Another thing to consider about NA here in the mountains is the fact that you lose 3% of your sea level hp with every 1000’ of elevation increase. ie: 5000’ = -15%, 7500’ =-22.5%. If you go with boost you’ll be making near sea level power here at altitude.
Boost Is King, But Can Your Head Gaskets Handle It?
Let’s say you have an engine with 9.0:1 static compression ratio, and you run 8 psi boost, your FCR will be 13.9:1. ( (8/14.7) + 1) = 1.544. 1.544 x 9.0 = 13.9. So you should choose a head gasket designed to seal continuously at around 13.9:1 CR or higher. And the more boost you make, the harder it is for the head gaskets hold it in.
How much boost can a 5.3 handle – LS1Truck
01-16-2008 12:46 AM #5. ff_jeff Guest. besides 6 psi will get you 325 whp. so 10 should be in the 350-400 range. if your at 20 psi…. who knows. 500-600whp depending on other mods. see how long 600whp will last on a stock tranny.
What You Need to Know About Supercharging a Silverado
This largely depends on which system you are looking at, but even entry level Silverado supercharger systems are good for a minimum 40% increase in horsepower and torque over stock, equating to an approximate gain of 100-125 horsepower. More aggressively engineered systems that produce higher boost levels can reach up to a 70% increase in power …
Crankshaft Tech how much can your crank take? – Kennedy’s Dynotune
Recommendations. Stock cast iron crank: these are generally suitable for up to 50% increase in power over stock. In other words, if the base motor produces ~300hp, a blower or SC setup up to 450hp total may be used with a reasonable expectation of reliability. Stock forged crank: these should be adequate up to a 75%-100% power increase over …
Preparing Your LS3 For Surviving Boost – Chevy Hardcore
The LS3 block casting is shared with the 6.2-liter L92 block that powers the Escalade and Denali trucks and LSA and LS9 supercharged applications. It features cast-in iron cylinder sleeves, however, the bore diameter is increased from 4.00-inches found in the LS2, to 4.06-inches.
How much can a stock 2.3 piston take? – Ford Focus Forum
12psi thru a GT28R on a 2.3 litre Focus might be around 240-250 WHP. 12psi thru a GT2871R on the same car might be around 30-40 WHP more. That extra power is enough to cause damage on a stock engine, that is my point. Stock engines have a limit to the output that can be produced in the long run without going boom.
Stock 4.8 horsepower?? | GMC Truck Forum
305 Posts. #2 · Feb 2, 2007. well, it has about 270 HP @ 5200 RPM with bolt ons you can get more hp then a stock 5.3l which has about 285 HP @ 5200 RPM. The tranny you most likely have is a 4L60E. To help the tranny out get a transgo shift kit, a corvette shift servo, and after you get all that, get a mail order PCM tune from westers or nelson …
What is the max lift on a stock 4.8 vavle spring – ASAP
Pragueress. Bachelor’s Degree. 286 satisfied customers. My 2005 Silverado extra cab Z71 4×4 w/ 6 lift..doors. I am seriously thinking of trading my 2005 Silverado extra cab Z71 4×4 w/ 6″ lift, vortec 5300, nice truck but I need the 4 doors, and I like the 08, 09 bigger Silverado.
How much boost can a stock 2.5 handle??? | IW STi Forum
You blew a built block, he is talking stock. On pump gas a stock engine with a 35r hour running on yesterdays borrowed time. 10-15k for a decent built block to handle that power. OP read through all the links provided, good info there. slackin via taptalk
Preparing Your LS3 For Surviving Boost – Chevy Hardcore
The LS3 block casting is shared with the 6.2-liter L92 block that powers the Escalade and Denali trucks and LSA and LS9 supercharged applications. It features cast-in iron cylinder sleeves, however, the bore diameter is increased from 4.00-inches found in the LS2, to 4.06-inches.
How much boost can a 5.3 handle – LS1Truck
01-16-2008 12:46 AM #5. ff_jeff Guest. besides 6 psi will get you 325 whp. so 10 should be in the 350-400 range. if your at 20 psi…. who knows. 500-600whp depending on other mods. see how long 600whp will last on a stock tranny.
Understanding LS Valvetrain Upgrades With Comp Cams
Another difference in the LS valvetrain is that they come stock with a fairly large diameter camshaft. “The reason the camshaft is larger is because the larger the diameter of the camshaft, the stiffer it will be and the more stable it will be,” Clay explains. The GenI and GenII Chevy small blocks came with comparatively small journal …
Resource
https://www.onallcylinders.com/2020/01/22/the-easy-way-to-make-820-hp-in-a-4-8l-junkyard-pull/
https://forum.hptuners.com/showthread.php?38488-4-8-Boost-Timing
https://www.motortrend.com/how-to/1505-650-hp-4-8l-ls-with-a-single-turbo-setup-mini-mouse-part-3/
https://www.onallcylinders.com/2019/02/07/lr4-4-8l-engine-specs-performance-bore-stroke-cylinder-heads-cam-specs/
https://www.enginelabs.com/news/a-look-at-the-worlds-quickest-stock-bottom-end-4-8-liter-ls-engine/
https://www.gmfullsize.com/threads/stock-4-8-horsepower.75034/
https://www.ls1gto.com/threads/how-much-boost-is-safe-on-a-stock-ls2-engine-upper-and-lower.430139/
https://racingcalcs.com/psi-boost-for-horsepower-target-calculator/
https://www.reddit.com/r/cars/comments/4yglgy/best_engines_to_run_high_boost_with_stock/
https://www.s10forum.com/threads/how-much-boost-can-a-4-3-handle.385485/
https://www.sr20forum.com/threads/whats-the-max-boost-a-stock-sr20det-block-can-handle.105605/
https://www.dragzine.com/tech-stories/turbo-fun-boost-basics-for-the-ls-based-engine-platform/
https://www.justanswer.com/chevy/450xz-max-lift-stock-4.html
https://www.motortrend.com/how-to/make-800-hp-boosted-5-3/
https://www.reddit.com/r/Chevy/comments/hmpfnb/how_much_boost_can_an_ls7_or_any_chevy_small/
https://www.ls1gto.com/threads/advice-5-3l-stock-bottom-for-high-boost-20-psi.423915/
https://www.lsxmag.com/features/car-features/sloppy-mechanics-make-1076-horsepower-with-stock-bottom-end-lq4/
https://www.z06vette.com/threads/maximum-horsepower-from-stock-ls6-when-boosted.121668/
https://www.enginelabs.com/engine-tech/gaskets-sealing/boost-is-king-can-your-head-gaskets-handle-it/
http://www.ls1truck.com/forums/powertrain/14835-how-much-boost-can-5-3-handle.html
https://www.americantrucks.com/what-you-need-to-know-about-supercharging-a-silverado.html
https://kennedysdynotune.com/crankshaft-tech/
https://www.chevyhardcore.com/tech-stories/engine/preparing-your-ls3-for-surviving-boost/
https://www.focaljet.com/threads/how-much-can-a-stock-2-3-piston-take.573482/
https://www.gmfullsize.com/threads/stock-4-8-horsepower.75034/
https://www.justanswer.com/chevy/450xz-max-lift-stock-4.html
https://www.iwsti.com/threads/how-much-boost-can-a-stock-2-5-handle.247390/
https://www.chevyhardcore.com/tech-stories/engine/preparing-your-ls3-for-surviving-boost/
http://www.ls1truck.com/forums/powertrain/14835-how-much-boost-can-5-3-handle.html
https://www.lsxmag.com/tech-stories/engine/understanding-ls-valvetrain-upgrades/