HOW TO MAKE HP WITH YOUR JUNKYARD 4.8L LS! CHEAP 4.8L POWER MODS. CARB VS EFI, SINGLE VS DUAL PLANE
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- เผยแพร่เมื่อ 5 ต.ค. 2024
- CHEAP, JUNKYARD 4.8L POWER MODS. WHAT CAM SHOULD I RUN IN MY 4.8L? CAN I MAKE 500 HP WITH MY 4.8L? CAN I RUN NITROUS ON MY 4.8L? SHOULD I RUN A BIG CAM ON MY 4.8L? WHICH INTAKE SHOULD I PICK FOR MY 4.8L? WILL A SINGLE PLANE MAKE MORE POWER THAN A DUAL PLANE ON A CARBURETED LS? WILL A CARB MAKE MORE POWER THAN EFI? CHECK OUT THIS VIDEO WHERE I RAN A STOCK 4.8L ON THE DYNO, THEN ADDED A MILD CAM AND NITROUS TO THE EFI COMBO. I THEN COMPARED THE EFI INTAKE TO CARBURETED INTAKE. I ALSO COMPARED A SINGLE PLANE TO A DUAL PLANE CARBURETED INTAKE ON THE LITTLE 4.8L!
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This guy gives more information in 10 min. Than most channels do in weeks. Love it!
He is straight to the topic and it’s excellent
I 100% agree! Cuts to the chase then elaborates Why later. Perfect
My 92 S10 with 4.8, 220/220 edelbrock 2215 cam, .510/.510 lift, performer rpm intake, 650 double pumper, 1 5/8 mid length headers to a 3” Y pipe made 312 rwhp and 308 torque through a T56 and 8.8 diff in my S10.
Pretty decent for such small
Components. Ran it in LS6 springs, stock pushrods and banged the 7200 rev limiter every time I drove it.
Seems light for your parts list. My buddy's 5.3 dynod at 409hp with a ls3 cam, intake, headers andfull exhaust and cai and 90mm tb. Obviously a tune. That trucks a single cab 1500 on coilovers and grippy tires.
I seen dudes push 320 with just a stage 2 cam and 1-3/4 headers
@nathanstout7763 I thought the exact same thing. There's a severe bottleneck/mistune Somewhere.
@@nathanstout7763 there are LS1s out there barely making 390 wheel with cam and headers. No two dynos read the same. The number are only good for tuning
@@MikeComberger you must not know how chassis dynos work
This is helpful thank you Richard!
A 4.8 with a 650 carb seems to be perfect for my future C10 swap.
word. it has no torque curve at all. its a flat line!
I have a BTR stage 4 ls1 cam in my 4.8. 799's milled .030, TBSS intake, Terminator X, 1.75"LT's, with a t5 behind it. Idled choppy at 950 and pulled past 7200...
Sounds wicked, I'm building a very similar 4.8 for high revs/power. Did you use bigger pushrods?
@@zacharylewis3528 I used a set of 7.375" pushrods. I only milled the heads because I had those. Also did trunnion upgrade. It drives well. I also have 3.90 gears.
I know most guys look down on a 4.8 vs it's bigger cousins, but I would like to make my first LS swap to be the little 4.8 I like to run against the grain, I'm just weird like that, especially with the carb setup.
Years ago I built a 0.060"-over 283 and the Edelbrock tech guy at the time didn't want me even going with a Performer RPM under 300 cubes. A single plain would have been awful.
I'm a bit of a 4.8 fan for a daily driver. I've had the one with the 706 heads in my truck 19 years now and use to get 24mpg out of it on interstate with 3.73 gears before they started dumping ethanol in fuel. Really torn between going 4.8 or 5.3 for my 85 el camino. I'd like more torque for my nice weather daily driver but I'd really like decent fuel mileage as well. The El gets 21mpg now out of the very tired 4.3 non overdrive 5 cylinder 😂😂 and a 4.8 with the cam in the video would be 3 times the hp and +130tq compared to what the 4.3 in my car was originally rated at 125hp @ 4,000 and 210tq at 2,000. Currently waiting on the fuel tank, pump, filter and lines to come in. I bet a 4.8 with a 4l60e and factory towing stall out of a 2500 truck and 3.23 gears would be alright and still get decent mileage being I run basically all highway.
The 5.3 is just worth it since the price is usually the same. More power
@@ZONES89RS it depends if you want the extra fuel mileage though. I have yet to see a 5.3 get 24mpg in a full size extended cab at 80mph. My 4.8 gmc has the 3.73 gear with 30'' tires. The equivalent gearing for the El camino's 26'' tire would be a 3.23 to keep the engine rpm the same for mph. My little 4.8 can still roast a tire from a light so I imagine it would be fairly peppy in a nearly 1,500lb lighter vehicle. Spanish league with a mild stall. But LS prices are outrageous here so I'm just going to finish the 385 lol
@@nashvilleoutlaw fuel mileage concerns with a V8 are laughable. If 30 ci makes your world upside down for fuel mileage you might wanna stock to economy cars.
@@ZONES89RS why is there always somebody online with the build it bigger or not at all mentality. For some reason I've wanted to build a v8 for fuel mileage for every bit of 4 years now. I know it won't get anywhere near 4 banger economy. Why not take your vast engine knowledge and try building something in a different direction. This should get your blood boiling as well. That 385 I'm currently building, should be pushing nearly 500 and it'll run exclusively on 87.... enter screaming libtard meme here🤣🤣🤣
@@nashvilleoutlaw then just leave a stock 4.8 alone and don’t complain about lack of power. Lol
I really think a 4.8 with like a truck cam btr stage 2 and a turbo is the way to go for max mileage and 500 hp
How about the TBSS manifold and see what would be the hottest street truck build. Not everybody wants a full tilt race engine.
what does hottest street ruck build mean?
I have a stock 4.8 with an Edelbrock dual plane and Edelbrock AVS2 650 with a BTR Torque cam. I have a FITECH 4bbl on the shelf. I'd be curious to see a follow up with single planes vs dual planes with 4BBL EFI like mine or Sniper. Also I running exhaust manifolds.
that won't change anything
@@richardholdener1727 I was under the impression 4bbl EFI likes single planes.
A 4 BRL EFI SUPPLYING FUEL TO THE SAME TWO INTAKES DOESN'T CHANGE THE INTAKE DESIGNS. IT IS THE DIFFERENCE IN THE INTAKE DESIGNS THAT DETERMINES THE POWER.
Just picked up a 4.8 for my truck looking to do some work on it
Answer is yes
Perfect swap for my rv
Scored a alumina 53 block with spun rod but has a ss2 and the 243’s with pac springs.
Whats ss2?
@@shadowopsairman1583sloppy stage 2 cam
WOW. i'm @4:47 and that cam woke that motor up. yeah it made big HP gains after 5k but look at that torque! it never dropped below 300 and it kept the original cams low end power
You think the carb would be good for towing? I tow horse trailers and camper trailers and want more torque
Thank you Richard!
Richard, I noticed the Performer RPM isn't notched. Would doing so extend top end power/torque?
Also, how about adding a 1 inch open spacer?
I know with BBC's all of this stuff has an effect.
It seems to hurt. Edelbrock did their homework it seems
Do you know, the muffin man?!
Has something to do with air an fuel, a carburetor that's what I suspect
What cam would you recommend mainly for sound with long tube headers and tune. More sound and small power upgrade is all I want.
YOU WANT THE CHOP
Better video.. tag me if you do it.. junk yard 1984 f-250 big block 460.. I put 1 in my 77 f-150.. don't take the heads off.. just carb and cam swap. Factory exhaust manifold..🤔 can you make big power?
you can't make big power with the stock heads, cam and exhaust manaifolds
@@richardholdener1727 so... what about good power from a cam and throttle body efi? Or bigger carb?
Do you need LS2 timing chain, LS7 spec lifters, LS2 timing chain damper, and Chromoly pushrods. When adding a cam to the LR4?
no
carb spacer would have been nice because the efi sees full throttle plate . where daul plane is seeing half per side
the single plane sees full throttle plate
@@richardholdener1727 its something im looking for answer for because of the GM 304 holden. Its efi manifold is horrendous
Do you have a book on making 1000 hp with a 4.8
cam, springs, turbo, intercooler, injectors and fuel pump
Good evening!
But, what about the single plane on nitrous with a big cam in a race application?
nitrous just adds to what is there-good or bad
Not all 4.8 are exactly the same gen4 they were terribly detuned
I have a 2007 Chevrolet Silverado Classic 4.8 daily driver any suggestions what cam everything is stock except S&B cold air intake and exhaust Carven R series muffler.
Low Buck Truck
@@richardholdener1727 Truck Norris?
I'd like to see some tests on the msd timing controller. I have a Holley sniper on a stock 5.3. With the msd box. And it runs good. Starts good. Even in cold weather. But I tried several different carbs on it. And they all had a slight hesitation off idle. Has a Holley dual plane intake on it as well. But just curious if I should build a custom timing table for it. Maybe the factory settings are not great for a carb
you definitely don't rely on the timing curves that come with the msd
Pity you never did the nitrous on the carb test against EFI
it does the same thing-and i have many times
How to make HP with a junkyard 4.8? Add boost. We all know the drill. 😎
Cam an heads is a good start
I'd like to know how a carb spacer would work out on the both carb set ups are they worth anything??
I doubt much on the single plane, dual plane might change something
For a 4.8 in a 72 cutlass what would bring in more power at lower rpm?
Stall converter to match cam
Hi Richard. I don't know if they make a Torker for the LS, but wouldn't that be a better single plain for a smaller engine?
they don't and the dual plane is best
Torker manifolds weren't very good. Great for hood clearance, not so much for performance
🛻 I want a 2007 GMC sierra 1500 2WD standard cab truck with a 4.8L v8 engine.How much money 💰 would it cost me to build a 550 horsepower naturally aspirated 4.8L v8 engine powered sierra truck?No supercharger,no turbo chargers,no nitrous.I would build the custom modified engine myself & modify automatic transmission.I will work with a professional automotive machinist for other performance enhancement🔧
I’ll say motor parts around 4-5k with everything
@richardholdener how much more horsepower would “more cam” produce up top for the drag race, super loose converter guys? Asking for a friend. 🤙🏼
see the other 4.8l videos
4.8 Short stroke, loves to ruv
The 293 already loves to rev but so does the 325, 346, 364, 382. taking a 293 Crank and dropping into a 364 only makes a 328. Not worth it. You're better off taking a 293/325 and making it into a 370 or a 383 Stroker (6.3L)
@@shadowopsairman1583 why refer to the new engines in CID and not L?
What is too big of a cam for a 4.8?
depends on what you want the motor to do
I want to put a 4.8 in my 73 Chevelle. I want it to have good power, but also be reliable to drive on the interstate for long distances like power tour for example. Suggestions? Should I build it with a turbo or no?
stock cam turbo
@@richardholdener1727 so leave the entire setup stock and put a turbo on it? intercooler as well? What kind of numbers?
Love the vids but please stop pushing carbs, most engines come with a computer anyway and the tuning possibilities are way better unless you ignore all the stuff a carb doesn't benefit from.
pushing carbs? you need to look at the channel a little closer
Do you think the single plane would have shined with a larger cam like cammotion titan king 236/244?
It will definetly make more peak power than the smaller cam but its already losing out on power most of the way up to 6500rpms. Unless youre looking for a 7k+ rpm combo, youll average better power with the milder cam and longer runner induction reving lower.
When you testes motors u have a afr. Why would I ask that
I love all you do Richard have been following you since the early Honda days. Keep up the good work and thank you for everything!!
What spark plugs are you using in tht 4.8L ???
Should i run a carburetor spacer on my duel plane 4.8😮
no
The best 4.8 power mod is a 6.0
True flat top pistons like on the Gen 3 not the valve relieved gen4, or domed, 862s for torque.
@@shadowopsairman1583I have a flat top 6.0(lq9) and flat top 5.3 l33 both gen4 rods of course but I don't have a 4.8 which all gen3 were flat top lol.
I do want to put a set of 4.8 pistons in my other 5.3 cuz they're cheap and why not lol.
@@BDauto86 no 2005+ are counted as Gen 3.5 which improved the conrods, but kept flat tops, gen 4 were valve relieved which dropped theor compression along with the 799 heads...
@@shadowopsairman1583I’ve seen 02’s with gen 4 rods and almost all 03’s.
Yes, but it’s 4X the money.
Im not really a lover of the 4.8 or really of the 5.3. I figure if you want to make easy power go with the bigger engine. I dont care about gas mileage if im having fun.
What Gen is a 2011
GEN 4
Richard, can you do a LS with a distributor and not coil pack?
Gm Performance actually makes a special timing cover that accepts a small block ford distributor.
@@nrgzrbunny7775 yes I know. but I never see anybody show any dyno results. I want to see the carb and distributor. I would use a HEI Davis Unified Ignition.
Nobody wants to see a backdated modern engine. Do it yourself
Spark and timing is spark and timing.
There would be no gains.
@@Hillsautomotive simplicity.
Personally I blame squirrels.....
Nuts!!
Smoke weed every day
GM has NEVER beat Ferrari..
Ford did with a V6!!!
Yawn
GM has some cars that have obliterated Ferrari times at the ring.
And the corvette has an insane amount of lemans wins.
@@ZONES89RS The only way GM beats anything is to the junk yard. One more screw up and GM will become Volkswagen.
@@raginroadrunner fk off lol. Pathetic dodge guys
Everyone with a few brain cells can build an LS..
Nitrous was the only interesting part. Besides that, more tiny cams and outdated carbs. meh
The data is still very useful. Theres a ton of people putting short runner manifolds on their mild combos and are losing out on significant power.
Also the point of running a small cam was to show that you dont need to overcam your combo.
Dont like it theres the door
out dated carbs? I take it you are new
@@richardholdener1727That's a great idea. Why don't you throw a Quadrajet on a LS just for us old guys who love outdated carbs.
Are you using the stock timing table or is the timming table changed if so is there a way i could see i have a e-mail or Instagram let me know thanks 😀✌
I run Holley ECU as indicated in the video-not the stock ecu or timing table
@@richardholdener1727 that's awesome I love your videos brother 😁👍 been following your channel for the past 3years that's for sure