Great video! Thank you for sharing! Keep up the great content! I believe bang for the buck is the turbo 4.great! Imagine what would happen with more boost! I'd like to see an 8.1l with a 80mm turbo and see what it would do. I've heard big torque like 1100 ft pounds at moderate boost.
I love all of Richard’s content. I’m a ford guy currently building a mild 408w, which Richard inspired me to do lol. Next build will definitely be LS! THANK YOU FOR EVERYTHING YOU TEACH US RICHARD!
LS is serious machinery. He did a recent video of TFS vs AFR LS3 heads. They peak at 380+cfm, almost 300cfm at .400" , 330+cfm at .500". As good as incredible Cleveland style or Yates heads and not expensive at all.
The 4.8 in my 02 Silverado spun a bearing. I replaced it with a 5.3. Drove it for several years on the 4.8 PCM without any problems. I'm sure a 5.3 tune would have been better but I did not have any driveability problems at all.
on a street car/truck the turbo almost needs a ducted compartment (dedicated to the turbo, maybe using the exhaust from the radiator 200f vs 800f+) so the underhood temps don't get crazy. if you turbo then leave things close to the hotside components the turbo game becomes a pain. I'm thinking (still) about a 5.3 swap for my sbf 351w efi camper van because the stock gm computers are more friendly to boost and it's a more efficient / more modern setup (compared to obd1 ford). If I keep the the sbf it will need to be efficient to run it, under 12mpg is no fun. A small cam 5.3 or 6.0 with an incognito turbo setup that I can add/remove without much trouble would be my ultimate. The 5.3 with a small cam with be a good base engine but an understressed 6.0 would be ideal if I were willing to sacrifice a few mpg for some tq. Hoping for 18 mpg n/a then more than 12 mpg with boost. The LS turbo 6.0 winnebago was getting 12 mpg in a full weight stock 6.0 turbo 4l80e which has me thinking I can get decent mileage in a van under 6k lbs. With e85 in the area a turbo 5.3 or 6.0 could be fun. Thanks Richard!
Richard checkout Porsche’s slick intake manifold design specifically designed for boosted engines. It’d be cool to see something like that design tested on a boosted 4.8. They claim higher efficiency which means more torque! Notes from Porsche: “The expansion intake manifold uses the principle of oscillating air in the intake manifold during the cooler expansion phase, keeping the temperature of the fuel/air mixture lower than in the 911 Turbo. This, in turn, means a significant increase in all-round efficiency, with fuel consumption down by up to 15 per cent under full load despite the increase in engine output.”
What I did/currently doing: 4.8 4l60 nnbs scsb truck originally got a ly6 for it and 4l80, then decided why stop there built the 4l80, added ring gap, 821 heads, bald eagle 229 cam, 1500cc snake eater injectors (flow tested closer to 1700) , dual 525 pumps and twin precision turbos, things got out of hand quickly 😂i figured it would, learned how to boost on a turbo'd b16a2 swapped CRX and I cant have a honda faster than my 6.0 truck now can I?
4.8Lx1.5= 7.2L. Like Richard has said many time in the past, a turbo is just a HP/TQ magnifier. Dial that 4.8L up to 10psi and you effectively have a 4.8Lx1.75=8.4L. BBC power right there. To make good TQ down low, you want a properly sized turbo (not too big) so that it spools quickly.
Hey Richard thanks for all you do! Was curious if you’d be able to make a video about a 6.0 w/ 2 4150/4500 throttle bodies on em ? Or maybe even just a single ! Thanks
I currently got a 07 classic Silverado with a 4.8, currently has a tsp intake manifold & 224r cam, push rods, valve springs, injectors, fuel pumps and t70 turbo kit runnin e85, what else can i do to it?
I appreciate that video. I'm towing with a 4.8 and I often wonder what other options there is. I'm contemplating a swap for a bigger stock engine as I need reliability and for what I know a turbo will affect fuel efficiency. Nice video.
More power equals more fuel usage no matter what although a turbo will likely be tuned a bit richer. Turbos often use more power because they're so much fun!
@@BLKMGK4 Yes, but when I tow I usually don't have fun and if I was to gain 50lbs/ft of torque I would rather like to have it with a longer stroke crank rather than pushing more on a short stroke crank. If I knew a turbo would improve mpg I would go that way, but my friends with turbo 4 banger told me how hard on gas their tiny engine could be when pushing it a little. And I doubt I'll be reasonable with a turbo.
@@olivierroy1301semi trucks have turbos. Size a turbo properly for the application and it’s entirely reasonable. You don’t want to oversize a turbo for towing. You’ll lose low end torque and response. That said, diesels are superior for low-end torque. They practically have nothing but low end.
Off the top of my head. For straight up junk yard find. I going to guess a little bit. But here we go. 4.8 liter engine with truck Norris cam. Injectors from a 6.o liter engine. A turbo and air to air intercooler from a 6.6 duramax . I don't know for sure if there's any difference between the 4.8 and 6.0 Injectors but I would think that the 6.0 has bigger Injectors and they should swap out just fine. So should the other parts. That's one of the reasons Chevy is popular. Parts interchangeable. I wouldn't try this with a Ford for sure. I realize there's probably going to be some fabrication or re-engineering on the Chevy, but I think it would be doable.
Already picked and built LoL. 408 with ported 317 heads and a smallish 222/233 115 lsa cam. Topped off with a TBSS intake she is 9.7:1 compression, 87 octane friendly, torque monster.
Just finished break in. 70' Chevelle Malibu 2dr, 4L80e, and a 9" with 3.50 gears. This combo plays nice with the stock LS Van (highest stock stall) converter. Foot brakes about 1700rpm, flashes around 2300rpm. Thanks to Richard videos, It ended up being Exactly what I wanted, Big block torque with small block weight and MPG (seeing 20-22mpg so far) @@Dan-rg7jj
but L83 heads with a cam that keep VVT on a 4.8 and keeping the Direct injection(maybe a belt driven high pressure fuel pump) should show some impressive numbers isn't?
Ever run sbc trickflow twisted wedge g1 heads? 13 degree intake valve setup. I have them and I can’t seem to figure them out with the proper rockers etc
For a Gen 1. I have them on a 400 sbc with comp special Rockers. They outflowed a afr head at the time. I just reassembled this thing for the second time and after 5 mins it appears to have collapsed a lifter again. The first time it actually knocked the tops right off 3 lifters
I’d like to see some inverted valve testing with boost. I know it’s almost exclusive to hemi engines but couldn’t you do the same with any engine if the camshaft was ground to to reverse the intake/exhaust lobes? I’m sure it’s more complicated than that but would it be possible?
@@richardholdener1727 yep… supposedly with enough boost to compensate for the reduced intake size, there’s a point where getting the exhaust out easier becomes more efficient. It seems plausible but I’m skeptical
I always ask myself, Do I see that run in any form of professional motorsports? Seems like a fun adventure (expensive though), but not something that will likely yield promising results.
not too put down the turbo stuff but I think long term the stroker would last longer than the boosted 4.8L. fresh built motor plus you could run 87 octane if you have the appropriate compression where as with boost your gonna need premium fuel and lets face it nobody really wants too shell out the extra cash for premium nowadays especially in a gas guzzling truck.
you have to look at the price aspect as well.. if you blow up the 4.8 $500 and you got another junkyard engine. Compare that to building a stroker. And you could also run a turbo 4.8 on 87 if you turn down the timing a few degrees.. And if you are worrying about gas price you should get a 4 cylinder instead..
@@turboimport95 i get what your saying, just pointing out some considerations, I wouldn’t build a stroker or do a turbo build personally I’d just find a junkyard 6.0 for 500 bucks cam it out and have fun
and yet for GenV they got rid of the 4.8. You can get the 5.3 V8 at 355hp, or step it down to the 4.3 V6 (at 285hp). Compare that to a GenIV 4.8 and you're at very similar power numbers, with less space taken and less weight. I wish they'd make a higher performance LTV6: 3/4 of an LT1 would be 4.65L and could work very well with good heads.
@@totensiebush Not to mention your spreading the engine workload out over more cylinders That's always an advantage especially for volumetric efficiency too I would bore the 4.8 to 5.0 liters and that's the last engine I would ever need to do The advantage of a small bore V8 you ain't moving them heavy ass 4 inch bore (even more depending on what year 4-4.125 inch pistons need a shit ton of energy to get em moving A 4.8 is gonna get going easier and quicker and still make plenty of torque thanks to the generous 3.27 stroke
88mm turbo with a camned 408 stroker in my Escalade on a conservative tune made 1022rwhp on 799 heads and TBSS intake. Made 1072rwhp same set up with ported LS3 and hi ram on a conservative tune because fail fuel injector. Video on my channel
Love your videos, I just swapped a 5.3 into my 89 Cressida and I’ve binged all your videos lately. Such good content
Glad you like them!
I wish I still had my 89 cressida =(
Yeah his content shows the overall quality builds for a particular engine combo.
DUDE! I’m wanting to swap a 4.8 in my 85 Supra🤙🏽
Great video! Thanks Richard
Need another Big Bang video on a turbo 4.8
Great video! Thank you for sharing! Keep up the great content! I believe bang for the buck is the turbo 4.great! Imagine what would happen with more boost! I'd like to see an 8.1l with a 80mm turbo and see what it would do. I've heard big torque like 1100 ft pounds at moderate boost.
Thank you as usual! turbo magnum! turbo magnum! turbo magnum!
Impressive. Boost is magical.
Great video!
I love all of Richard’s content. I’m a ford guy currently building a mild 408w, which Richard inspired me to do lol. Next build will definitely be LS! THANK YOU FOR EVERYTHING YOU TEACH US RICHARD!
Right on!
LS is serious machinery. He did a recent video of TFS vs AFR LS3 heads. They peak at 380+cfm, almost 300cfm at .400" , 330+cfm at .500". As good as incredible Cleveland style or Yates heads and not expensive at all.
The 4.8 in my 02 Silverado spun a bearing. I replaced it with a 5.3. Drove it for several years on the 4.8 PCM without any problems. I'm sure a 5.3 tune would have been better but I did not have any driveability problems at all.
on a street car/truck the turbo almost needs a ducted compartment (dedicated to the turbo, maybe using the exhaust from the radiator 200f vs 800f+) so the underhood temps don't get crazy. if you turbo then leave things close to the hotside components the turbo game becomes a pain. I'm thinking (still) about a 5.3 swap for my sbf 351w efi camper van because the stock gm computers are more friendly to boost and it's a more efficient / more modern setup (compared to obd1 ford). If I keep the the sbf it will need to be efficient to run it, under 12mpg is no fun. A small cam 5.3 or 6.0 with an incognito turbo setup that I can add/remove without much trouble would be my ultimate. The 5.3 with a small cam with be a good base engine but an understressed 6.0 would be ideal if I were willing to sacrifice a few mpg for some tq. Hoping for 18 mpg n/a then more than 12 mpg with boost. The LS turbo 6.0 winnebago was getting 12 mpg in a full weight stock 6.0 turbo 4l80e which has me thinking I can get decent mileage in a van under 6k lbs. With e85 in the area a turbo 5.3 or 6.0 could be fun. Thanks Richard!
Richard checkout Porsche’s slick intake manifold design specifically designed for boosted engines. It’d be cool to see something like that design tested on a boosted 4.8. They claim higher efficiency which means more torque!
Notes from Porsche: “The expansion intake manifold uses the principle of oscillating air in the intake manifold during the cooler expansion phase, keeping the temperature of the fuel/air mixture lower than in the 911 Turbo. This, in turn, means a significant increase in all-round efficiency, with fuel consumption down by up to 15 per cent under full load despite the increase in engine output.”
THNX-I'LL HAVE TO CHECK IT OUT
What I did/currently doing: 4.8 4l60 nnbs scsb truck originally got a ly6 for it and 4l80, then decided why stop there built the 4l80, added ring gap, 821 heads, bald eagle 229 cam, 1500cc snake eater injectors (flow tested closer to 1700) , dual 525 pumps and twin precision turbos, things got out of hand quickly 😂i figured it would, learned how to boost on a turbo'd b16a2 swapped CRX and I cant have a honda faster than my 6.0 truck now can I?
Right on
The small cam 408 looks like it would be fun on the street.
Let’s see a 67 mm turbo and the sky ram on that 4.8
I have a 5.3 in GMC Sierra 4x4 and I want more torque... so it's a turbo with 7 lbs of boost for me ... thanks
4.8Lx1.5= 7.2L. Like Richard has said many time in the past, a turbo is just a HP/TQ magnifier.
Dial that 4.8L up to 10psi and you effectively have a 4.8Lx1.75=8.4L. BBC power right there.
To make good TQ down low, you want a properly sized turbo (not too big) so that it spools quickly.
Yep. Have a cooling system that can manage it. Id suggest redline water wetter too. It really works.
Can’t beat the linear linear torque of a supercharged engine, in my opinion. For a street car, at least.
Loving these torque videos! No one does them!!!!
A smart builder looks to make all the torque he can regardless of engine use .
Hey Richard thanks for all you do! Was curious if you’d be able to make a video about a 6.0 w/ 2 4150/4500 throttle bodies on em ? Or maybe even just a single ! Thanks
the 4150 6.0l video is up (EFI vs carb) and I ran two of them on the big bang nitrous 5.3l video
@@richardholdener1727 thanks man !!
I currently got a 07 classic Silverado with a 4.8, currently has a tsp intake manifold & 224r cam, push rods, valve springs, injectors, fuel pumps and t70 turbo kit runnin e85, what else can i do to it?
Do a Howards cam 190315-08 in a 4.8 LS please
I appreciate that video. I'm towing with a 4.8 and I often wonder what other options there is. I'm contemplating a swap for a bigger stock engine as I need reliability and for what I know a turbo will affect fuel efficiency. Nice video.
More power equals more fuel usage no matter what although a turbo will likely be tuned a bit richer. Turbos often use more power because they're so much fun!
@@BLKMGK4 Yes, but when I tow I usually don't have fun and if I was to gain 50lbs/ft of torque I would rather like to have it with a longer stroke crank rather than pushing more on a short stroke crank. If I knew a turbo would improve mpg I would go that way, but my friends with turbo 4 banger told me how hard on gas their tiny engine could be when pushing it a little. And I doubt I'll be reasonable with a turbo.
@@olivierroy1301semi trucks have turbos. Size a turbo properly for the application and it’s entirely reasonable. You don’t want to oversize a turbo for towing. You’ll lose low end torque and response.
That said, diesels are superior for low-end torque. They practically have nothing but low end.
There is one more thing the 4,8 needs. TUNNELRAM 🤩
So aftermarket block 454 LS and boost right?
i got a direct injected l83 and i want a 4.2 :P
Off the top of my head. For straight up junk yard find. I going to guess a little bit. But here we go. 4.8 liter engine with truck Norris cam. Injectors from a 6.o liter engine. A turbo and air to air intercooler from a 6.6 duramax .
I don't know for sure if there's any difference between the 4.8 and
6.0 Injectors but I would think that the 6.0 has bigger Injectors and they should swap out just fine. So should the other parts. That's one of the reasons Chevy is popular. Parts interchangeable. I wouldn't try this with a Ford for sure. I realize there's probably going to be some fabrication or re-engineering on the Chevy, but I think it would be doable.
if using stock injectors-go for the flex fuel units
If you put a 5.3 on a 4.8 ECU it'll still run rich because the ECU will just adjust the fuel trims and it's allergic to the VE table.
I like your low speed torque comments 😅
Already picked and built LoL. 408 with ported 317 heads and a smallish 222/233 115 lsa cam. Topped off with a TBSS intake she is 9.7:1 compression, 87 octane friendly, torque monster.
Nice combo. Been driving it long? What trany and gears?
Just finished break in. 70' Chevelle Malibu 2dr, 4L80e, and a 9" with 3.50 gears. This combo plays nice with the stock LS Van (highest stock stall) converter. Foot brakes about 1700rpm, flashes around 2300rpm. Thanks to Richard videos, It ended up being Exactly what I wanted, Big block torque with small block weight and MPG (seeing 20-22mpg so far) @@Dan-rg7jj
@@rancherlee Nice! I need to up my stock converter. 382 stroker 206/212 cam, 4l65e and 3.73 gears. Goes ok needs more tuning.
408 with a mild cam and boost....of course! A T4 7875 should be instant on with that combo.
but L83 heads with a cam that keep VVT on a 4.8 and keeping the Direct injection(maybe a belt driven high pressure fuel pump) should show some impressive numbers isn't?
those would all be good-but also expensive
Ever run sbc trickflow twisted wedge g1 heads? 13 degree intake valve setup. I have them and I can’t seem to figure them out with the proper rockers etc
twisted wedge head for an LS?
For a Gen 1. I have them on a 400 sbc with comp special Rockers. They outflowed a afr head at the time. I just reassembled this thing for the second time and after 5 mins it appears to have collapsed a lifter again. The first time it actually knocked the tops right off 3 lifters
get a Holley sky ram on that 4.8. torque for days 🤣🤣
turbo 6L reliability closer to a stock motor, torque like a 408, and lots of power on top
Which fuel injectors are you using for these LS builds with cam upgrade, ring gap, and boost?
80S
I’d like to see some inverted valve testing with boost. I know it’s almost exclusive to hemi engines but couldn’t you do the same with any engine if the camshaft was ground to to reverse the intake/exhaust lobes? I’m sure it’s more complicated than that but would it be possible?
have the air flow in through the smaller exhaust valve?
@@richardholdener1727 yep… supposedly with enough boost to compensate for the reduced intake size, there’s a point where getting the exhaust out easier becomes more efficient. It seems plausible but I’m skeptical
I always ask myself, Do I see that run in any form of professional motorsports? Seems like a fun adventure (expensive though), but not something that will likely yield promising results.
Simple...I would add cam, heads, and turbo. Maybe even a STS remote mounted kit.
I like it!
What thermostat temperatures produce the best power and fuel economy for towing? 6.0LS
STOCK FOR TOWING-BUT NOT FOR POWER-THOSE ARE AT OPPOSITE ENDS (COLD FOR POWER, HOT FOR MPG)
Now you have me wanting to add 7 lbs to my 408!
only 7?
@@richardholdener1727 well, it’s 10.8:1 and we only have 93 octane around here. I wish we had E85!
What would be the easiest to keep cool when towing?
coolers
No replacement for displacement
So what would be a fuel consumtion comparison between the 4.8 turbo and a na 6.0?
have not tested
An educated guess would be good for me at this point. Been thinking a turbo 5.3 would give better fuel milage in my 1 ton than a 6.0 but not sure...
What about supercharger roots style
also good
💪🏾💪🏾💪🏾💪🏾💪🏾🥳🥳
4.8 all day!
What about this combination: 4.8, carburator with dual plane and turbo?
Yeah just skip all that chief
I have run carb turbo stuff with a dual plane
Add more boost to the 4.8,needs 2 turbos just because
not too put down the turbo stuff but I think long term the stroker would last longer than the boosted 4.8L. fresh built motor plus you could run 87 octane if you have the appropriate compression where as with boost your gonna need premium fuel and lets face it nobody really wants too shell out the extra cash for premium nowadays especially in a gas guzzling truck.
you have to look at the price aspect as well.. if you blow up the 4.8 $500 and you got another junkyard engine. Compare that to building a stroker. And you could also run a turbo 4.8 on 87 if you turn down the timing a few degrees.. And if you are worrying about gas price you should get a 4 cylinder instead..
@@turboimport95 i get what your saying, just pointing out some considerations, I wouldn’t build a stroker or do a turbo build personally I’d just find a junkyard 6.0 for 500 bucks cam it out and have fun
@@chrishansen7004 problem is you cant really find a 6.0 for 500 they are a lot more. More like 1200 to 1500
Now I wanna know what a turbocharged 408 stroker puts out...
the one here would do 1250 hp at 15 psi
@@richardholdener1727 Spicy!
@@richardholdener1727damn i need that and need it now.
6.2 bored an stroked to a 427 .then throw a turbo on it for shits anm giggles
needs to be sleeved to make a 4.125 bore
I’d boost the 4.8
GM was brilliant to make the 4.8
It's like the company recognized the fact that smaller v8s are the way of the future
The 4.8 is the way to go
and yet for GenV they got rid of the 4.8. You can get the 5.3 V8 at 355hp, or step it down to the 4.3 V6 (at 285hp). Compare that to a GenIV 4.8 and you're at very similar power numbers, with less space taken and less weight. I wish they'd make a higher performance LTV6: 3/4 of an LT1 would be 4.65L and could work very well with good heads.
@@totensiebush
Not to mention your spreading the engine workload out over more cylinders
That's always an advantage especially for volumetric efficiency too
I would bore the 4.8 to 5.0 liters and that's the last engine I would ever need to do
The advantage of a small bore V8 you ain't moving them heavy ass 4 inch bore (even more depending on what year 4-4.125 inch pistons need a shit ton of energy to get em moving
A 4.8 is gonna get going easier and quicker and still make plenty of torque thanks to the generous 3.27 stroke
Add boost!!!!
2nd
Take the 4.8/5.3 and build it to a 6.3L
First view . I must win something 😂
points
IMO a 383 on a street driven vehicle. Just Bullitt proof and low tech.
do it all lol
88mm turbo with a camned 408 stroker in my Escalade on a conservative tune made 1022rwhp on 799 heads and TBSS intake. Made 1072rwhp same set up with ported LS3 and hi ram on a conservative tune because fail fuel injector. Video on my channel
how high was the boost
@@richardholdener1727 21#
the rec ported heads are about 30 hp better than 799 heads on a cammed NA 6.0L, so with boost 50 hp seems right-maybe even a tad low