Richard I sincerely hope you never run out of things to test :)

At higher boost and power levels, the bigger cam will be softer on the rods and bottom end. Something to consider for stock bottom end motors.

Again and again you are helping taking the guesswork and myths out of the turbo forums!! The results are facts and that’s all that needs to be said. You are a great help!! Thank you so very much 👍

What is your goal? That’s the first question. If you want to use your truck to pull a trailer, I’d say a small turbo, like 500 hp capable, that will give you boost at 2000 rpm or somewhere close, and probably a stock cam. If you’re building a dual purpose hot rod, choose something bigger and a smallish cam. If you’re drag racing, forget about anything below your torque converter stall speed. This was a great video, thanks Richard!

Richard, you made Friday come a day early! We appreciate everything you do, esp with the 2.2/2.5

Yes, this is excellent information, exactly what we need to see. The more we can learn about how cams intakes and turbos work in relation to each other the better.... Thanks again Richard.

This makes the 5.3 + small cam + turbo even more compelling...but still the 4.8 blows me away everytime. 700hp under 14 lbs with a tiny 202 cam is crazy...tons of torque even at low boost under 10 lbs. I think a 72 or maybe a 76mm turbo feeding a 5.3 with a 216 or truck norris cam could be an awesome and mild yet incredibly powerful combo for a truck/van that tows occasionally. Thanks Richard!

Boost response can be a double edge sword. My cruze is much easier to drive with a bigger turbo and bigger cams. The factory setup is into boost just off idle and made it very easy to spin tires. With it being a little laggy it doesn't spin as easy but still sometimes will break traction around 3500 when the boost is coming in very hard.

I took Richard's advice on a smaller cam and it works great. I used an LQ9 short block 241 heads(got a good deal and better than the 317) trail blazer intake 92mm tb with a 218/224 .604/.604 112 camshaft

man o man MY dude! I've been wanting to find an aluminum 5.3 to re-sleeve for boost to save weight but all these 4.8 videos are making me not really care about that 75ish pound difference. Thanks for putting out so much content R.H.

Great stuff Richard!!

Love it. I learn stuff from every video, thank you! turbo magnum! turbo magnum! turbo magnum!

My son has a 2011 chevy cruze eco 1.4t 6spd manual 138hp that has absolutely zero lag and my daughter has a 2016 1.4t 152 hp and is a dog off the line compared to the 2011 138hp version. Smaller cam and turbo gives a much better spool rpm at lower rpms

I'm loving the 4.8 stuff lately, I've been spending a lot of time in my twin turbo 4.8 awd truck the last 4 months or so. To be honest they work amazing on small turbo(s) on the stock cam. The power and stretch's out for eveerrrrrr. I can get 10psi boost at 2500rpm in the higher gears and still make solid power up to 6500rpm. Cruising highway at 75mph at 1900rpm it's able to make about 6-7psi and almost never downshifts. These engines are amazing for boost without even needing to be opened. Mine is 100% stock even on stock ring gap, stock head gaskets, stock head bolts. It's never been opened past valve covers and oil pan (had to fix oil leaks). Tuned on 87 octane because I'm a cheap ass it still accepts 13 degrees of timing at peak torque in phoenix az 110 degree heat. The thing is unstoppable. Wastegates are set at 10psi but it spikes 13-14 when it shifts 1st/2nd. Towing is amazing with it too. Anyhow, thanks again for the knowledge you always pass down to us through your videos!!

Great video as always 😎

I think if you are planning on a turbo engine then a person should concentrate on on low speed torque because that's what drives the turbo. Bigger torque makes the turbo more responsive and let the turbo make the hp. That's just my opinion. Great presentation. Thank you for your time and effort it's fun to learn

I would go with the Torque Cam, Truck Intake, Smaller Turbo and to bump it over 700 h.p add a pound of boost that would be super fun in a S-10 BUT, I would just start out with a 6.0 and have some more fun. 😁 I also understand where your coming from, if a 4.8 is what ya have and all ya got then go with it. 🤙🏼

Have yet to get it in the car... but I put together a 4.8L for a friend a few years ago. Gen IV 4.8L with 68K miles. 706 heads, Gen III intake, TSP 216/220 .600" 110 + 0 cam. (He's cheap and this is a bunch of cheap or free parts he acquired) I'm trying to get him to use around a 70-72mm turbo. (He seems to think he needs a 76-78mm turbo) It's going into an 82 Caddy 4 door with a 4L85E and highway gears. He's chasing a number, I'm trying to make it reliable and fun to drive. Rings aren't gapped, only 93 octane - so trying to stay around 8-10psi. No matter what, it will make way more than the factory 4.1L (125 HP)

Basically why I was trying to steer yesterday's live C30 van owner away from a 224 cam when he wants mileage

the low end torque at low engine speeds will fold rods, if you're going for power..spin it fast and have better mechanical torque management.

Well plus I suspect the more boost on the stock cam is not really a penalty if you have a good cooler as even though the boost is more the cylinder pressure is probably the same so even with running more boost in this case no need to dock the timing.

When I built my trans am engine, I asked Butler Perf for a solid roller 224/224 cam. they said that such a cam would be way too small for a 455 Pontiac. I told them I am turbocharging the engine. "oh, never mind" they said, and they asked me for my credit card number.

I WENT WITH A LM7 5.3 WITH 243 HEADS AN A SUMMIT STAGE 2 TURBO CAM A DORMAN KNOCKOFF MANIFOLD . WITH A GT45 TURBO . IM HOPING TO MAX OUT THE GT45 FOR A FUN STREET/TRACK CAR

You missed the fact that if you raise the static compression ratio, on the big cam combination, so that the dynamic compression ratio between the cams was the same the big cam would have made the power down low also. The real question is what is the efficiency of the turbo in the rpm range for which the engine is designed. I size my turbos so that the high efficiency island is near the torque peak.

Howard’s specd me out a turbo 351 Cleveland cam and it was smaller than I thought.

Thanks mate.

Great video

1:34 on that first dyno graph was that dip in the torque curve in the low rpms legit you think or just a function of the load in on the dyno making artificially high to start?

Thanks Richard

That's good s*** brother like finding out content from you thanks😊

Our 2.7 L Ecoboost twin turbo if you take the 335 whp and convert it to Fwhp it’s making 411 fwhp, at 5750, the 380 wtq I don’t know how to convert it to fwtq but 380 is still tough. The thing that helps longevity is that the power is from 2000-5700 and in the Edge ST with the 2.7 twin turbo and 7 speed with the AWD starts with an H. transverse front transmission/ transverse case to feed the rear. The car feels planted and goes. I was surprised and we take car of stuff, at 62 we have bought our last car. I have offered to allow Ford to test any OTA tune updates that they want to try. We run 93 octane Phillips 66. And I see updates on my app. Good power that shows what a well built engine and boost is capable of. 2 hp per cube to the ground.

Nice to see you do this video after me messaging you last week. You told me this sort of set up also for my street Mercury zephyr turbo 5.3 ls. When you say long runner would a car intake work also as I need the hood clearance and truck manifold won't fit?

Top left Richard! Heaps of room there

So Rich, would the other bigger cam be better paired with a supercharger instead? Since you get instant torque and the big cam makes up on top end? I keep flipping back and forth with what i want but I got the BTR red hot cam with a 402ci stroker on a 6.0l. Everytime I watch your videos I think i made a wrong choice with my combinations 😅

I'd love to have the more responsive setup I'm my 65 skylark

What about the btr stg 2 turbo cam in a 348ci with a truck intake and a 7875?

Richard, first I would like to say I really enjoy viewing your videos. With the help of my father & your channel, it has gotten me through my first ls engine rebuild. After 2.5 yrs of restoring an 86 caprice landau, I am hoping to start the engine for the very first time come March 24’. As the plan will be to break in the motor with a street tune & come back several 100 miles & oil changes later to get on the dyno. What do you think about this set up & how much power gain could I potentially get out of the motor being a street performer. First as NA. Then under boost: LQ4 6.0, 370ci, 4.030 bore. Pro LS Forged Pistons, 12cc dished, Eagle H-Beam Connecting Rod, all new bearing, ARP studs, stock crank, 24x welded reluctor wheel, BTR stage 2 turbo cam, intake duration @ .050” 226, exhaust 231, intake lift .610, exhaust lift .609, LSA 113, ported 243 heads (64cc) with dual .660 TS springs, trunnion upgrade, LS7 lifters, LS9 gaskets, 9.5 CR, 1 7/8” headers, edelbrock pro flo xt intake. What max NA hp would you say to the flywheel. Now under boost, could a FORCED INDUCTIONS V5 BILLET S476 SC 83 TW 1.00 A/R T4 Housing get me to 800whp? Air to air intercooler. Running e85. Is this too big of a turbo for a street application? Big rim family with 26” tires with a 2800-3200 stall & a 3.73 gear. I am also hoping with the right tune & timing, I dont get much boost lag. Thoughts..thank you

Makes sense

Here’s the combo I have come up with for my LR4 after watching hours and hours of your videos. Pro LS 2cc dome pistons, Pro LS stock length rods, crank work, Wilkes Performance CNC heads with 2.02/1.57 valves, BTR Torque cam, ported TBSS intake, 92mm throttle body, haven’t decided on a turbo yet. Thinking a GBC-900 , Holley rails and so forth. Shoting for 600 to the wheels for a fun street toy. Whats your opinion on the setup?

Boom!

I've known for a while, I want stock parts plus a very modest turbo... Plus my multiple fuel system to cruise on 87 octane. Treat the high octane and turbo kind of like nitrous, but less stupid. I mean, I still want to do some goofy long intake and exhaust runners, partially for pragmatic reasons, partially because 'god damn it, I just want to'.

Question for you, Richard: If you had a 4.8 and a 5.3, both built for street driving with appropriately-sized cams and turbos, would the 4.8 use noticeably less fuel in normal driving than the 5.3? I'm thinking of motor-swapping a Buick Roadmaster wagon and hoping to make much more full-throttle power with equal or better mileage cruising at 65 on the freeway. Either 'little' LS will handily make more than the old LT-1's 260 hp and 335 lb-ft, but would one be much more efficient?

Just crank up the boost…. 🙄

👍💪

Hey ,what a small cam under 600 lift

In a supercharged application this low rpm power loss with a big cam is negligible right?

What size turbo for best boost response would you recommend on a 5.3 with Truck Norris Cam 243 heads and stock truck intake running 93 octane

Won't more boost solve all problems? 😁

What about BulletRacing cams?

Can we stop using 75-80mm s400x turbos when only running 13psi max? Nobody buys a s475 80, to only run 13psi.. max 20psi the new standard

Put a m90 on a 4.3

1

I need everyone’s help I have a 05 Silverado with a 5.3 bored to 3.903 stock rods 10.9 compression a chopacabra cam I don’t drive crazy I’m not looking to make a stupid high dyno number it’s a daily driver that will never see over 5,500 rpm’s I want a responsive single turbo if it runs out of steam at 6k it doesn’t matter every body keeps suggesting a 78/75 and I think that’s way more turbo than I need suggestions would be greatly appreciated

Needs more cowbell,nope my bad,more boost is better

Now how about the 5.3? Lol

Lol, not even a contest. Who'd be running a 305 in strip form. Unless you can't plant the rubber