Back in the 80s it would have been a super charged engine just to hit 500 hp or a really built engine with alot of the good stuff and race fuel to reach 500 and that would have been with more cubic inchs, now. 325 cubic inchs will do Almost 600 hp N/A

@Texas_Road_Warrior

11 ай бұрын

It’s all in the cylinder heads… literally everything in the last 20 years is SO much more efficient than it was in the 80/90s

@philthelawnman

11 ай бұрын

Don't forget the main caps are 6 bolt not those fragile 4 bolts we had then or even the splayed 4 bolts that only wanted to be like Rotex. I had 2 NA motors around 800 and one well above at 980. That was 10 k in the 80's and close to 100k for the same parts today.

@MechanicalMafioso

11 ай бұрын

@@Texas_Road_Warriorit’s not all in the cylinder heads. Much over 500 HP and the bottom end becomes very important. I got schooled by Mr. Carl Wegner from wegner motor sports back in the day. When I witnessed a for SVO 5.0 built engine from them turn 841 HP on the dyno. Granted that was a NA late model racing engine but facts still remain the same. Lots of HP gets either lost or made in the bottom end.

@davidcunningham00

11 ай бұрын

Let it be known. I still have a soft place for sbc 350, and will build 1 this year, but I'll shot for 400 ish hp

@thetruthspeaker1978

11 ай бұрын

Those old engines didn't turn any rpm.. Hp=torque × rpm/ 5252

Those L83 heads might even be a good addition to a 5.7 ls1. I was looking at the port size of the L83, and just amazed how big they are just for a 5.3.

The LT engine reigns supreme

Richard thanks for all of your hard work!! It doesn't go unnoticed. Thumbs up 👍

@kevinshiley9061

11 ай бұрын

Richard does all the time consuming hard work , for us! Thanks Richard!!

you are the new David wizard for my time of living as a first gen millennial

@richardholdener1727

4 ай бұрын

David is a legend-I have a long way to go before I could fill his shoes

Those LT engines are pretty impressive.

You answered all my questions, thanks. That L83 is strong!

L83 heads are legit!

Yes sir Richard thanks bud have a great Sunday and blessed one with your family see ya later 🤘💪🇱🇷

More power Mr Scott!!!!

Pretty easy, hardly an inconvenience to make 500hp with the lt. Very nice. Wonder how the headers would fit in a Chevy ss/caprice.

Richard thanks

I'd love to see a similar comparison using the L8T, using a stroker LS close in displacement w/ ported LS3 heads. maybe a L8T with ported LS3 heads/intake if it's possible?

Wow, the 351 ford Cleveland was re designed with direct injecting.

more excellent content!

How about the new 6.6L truck engine? That's what I'd like to see with mild cam and trinity intake.

@shadowopsairman1583

11 ай бұрын

They are good engines,

@horsefly1020

11 ай бұрын

Probably 500hp considering they are 400 stock.

@rickbaker9053

11 ай бұрын

Their rods were made weaker so you'll have to upgrade rods....not sure at what point they break but a guy had 5 blocks with three of them having holes in them from rods letting go.

@rustysausage69

11 ай бұрын

From building a couple dozen of LTs i can tell you that you're VERY limited in camshaft upgrades because GM ran the piston-valve clearance VERY tight on LT motors. Were talking anything over 230@.050 and you really ""SHOULD"" flycut the pistons or put a different piston in it with valve reliefs. In a LT1/L8T that size camshaft (for non-flycut or upgraded pistons) and ported heads give you roughly 500-550wheel horse.

Nice

Those stock plastic intake manifolds always impress me

More like this

Could you please revisit the 8.1 and do some side by side comparisons of the intake that Raylar dropped like 8 months back? Please & thank you.

I’ve got a gen 4 iron block 6.0 and a set of LT heads just waiting for the right time.

It's all good stuff. Thank you for your time and effort and knowledge. Well yawn another 500 hp engine. I'm so used to seeing you get 1000 plus hp that 500 just seems like child's play. Just kidding. It's great I love it. Just curious. Is a LT 5.3 stroker to 383 cubes in the future or twin turbos. Or both

It's all in the heads. Port injection makes more HP than DI. I wanted to do L83 conversion on my LS1, but went with ported 706 heads :/

@richardholdener1727

11 ай бұрын

no on port injection making more power

@SMOKEY-JAYS-DIESEL

10 ай бұрын

🤣🤣 direct injection is always going to make more power. That's why diesel engines are direct Injected ✅

@shaungiles5986

8 ай бұрын

HEY RICH, WAS THE L86 INTAKE RAN PORT INJECTION OR DIRECT INJECTION?

wow that’s the direction im headed with the newer engine stuff there laying around junkyard in police tahoe’s-put that in a 2000 lbs 4 link car with-Programmable nitrous !!!

Great test... please visit the correct LSA test on the DI engines .., after the LSA test on the LS402 proved that most cam companies are grinding cams with an LSA too wide for maximum TQ/Power ... would like to see what it does with the DI engines ... thanks keep up the great testing

@richardholdener1727

11 ай бұрын

ask yourself why people buy cams-then decide on what is too wide

@lukesimeon5756

11 ай бұрын

I think most people buy cams hoping to get the maximum TQ/hp ... And I think fortunately you have decided for us that most of the cams sold have an LSA that is too wide ... at least according to your testing ... an advance/retard sweep on the cam is advancing or retarding the cam timing to see where the engine wants the adv/retard to be for maximum TQ/hp... I’m certain you’ve done this b4 ... sorry for not making it clear ... thanks for all your hard work

@richardholdener1727

11 ай бұрын

People DO NOT buy cams for max power/torque-the vast majority of cams sold are not maximum effort-in fact only a tiny fraction of cams are max effort. Every cam does not need to be a tight LSA. To think so is to not understand the cam market

@lukesimeon5756

11 ай бұрын

Maybe I should have said max tq/hp for their combination ... my mistake ... like a 5,000lb 4x4 pickup with a truck Norris cam in it ... for that combo they want the max it will give and I think everyone that has a daily driver pickup would agree with that ... with all due respect I don’t think or know of anyone who installs a cam and doesn’t expect the max out of it but maybe I’m wrong idk ... I think you would agree because when you tested the TN cam you look at the dyno graph to see the max TQ/hp and the max average TQ/hp ... my poor writing skills are shining thru... I wasn’t talking about a max effort 1000 hp NA combo... I was talking about the average Joe that watches your channel like me and many others that would just like to get the max out of their pickup or street car with a mild cam ...as with the test of the 402you proved that the wider LSA made less TQ/hp ... of the 4 people I know that have done an LSA test all came up with same conclusion that a wider LSA made less TQ/hp I do appreciate all your tests and I think that’s why you test to prove what works and what doesn’t ... thanks so much

@jimboyokel

11 ай бұрын

@@lukesimeon5756 I'd say most people want to get max "chop" out of their cam, not max hp/tq.

Id rather have lm7 anyday cus gm is recalling all 2013 LT motors to 2023

Lets see stock L92 with L86 heads

Sound like the hybrid is a good budget build depending on what LT heads are worth.

@rustysausage69

11 ай бұрын

Youd be lucky to find a pair of LT heads for less than $1200 in the midwest. Add custom cam, valvetrain, intake manifold and nickel-dime stuff and its very not not budget. If budget is in mind, youd be better off just using a L83 dropout and tossing a off-shelf cam on that thing with a DoD delete.

@craigquann

11 ай бұрын

@airplanelover1231 yea but you would do that all anyway on an LS build. My point was that the stock LT heads are probably cheaper than new ported and polished LS aftermarket heads

@cartermackenzie1135

7 ай бұрын

​@rustysausage69 man I've seen entire l83s for less than that here in DFW

Wonder what the hybrid would do with ported & milled l83 heads.

Which ECU for the LT? Haltech Nexis 5R? Can it control VVT and GDI? I really appreciate the LT content- next great thing!

@richardholdener1727

11 ай бұрын

yes on the Haltech-controls both

Hey Richard, I think it'd be a really neat idea to put these on a 4.8 l and see how they do with the short stroke and high RPM compared to the 5.3

@richardholdener1727

11 ай бұрын

it just makes less on the smaller motor

@jaysgarage4802

11 ай бұрын

@@richardholdener1727 well it would be neat to see how much the Lt heads gain on a LS1. I've been thinking about boring out my lm7 to a LS1 bore and getting my 706 heads ported by hoopers heads out of Dallas but those results That was shown with the l83 heads on the lm7 were really awesome. I appreciate all that you do man!

@Diablo_7212

10 ай бұрын

​@@jaysgarage4802I'm boring my 5.3 to a 5.7 and adding tsp prc 220 heads. Can't wait to see what it puts down

LS>LT for reliability alone. The reliability in the new LT motors is just not there. They performed very well but I would sacrifice some performance to have reliability

@Noah-me8dg

11 ай бұрын

Only issue with reliability is the lifters. Same dod/AFM lifters GM implemented in the LS. Both great engines.

@OndreaS123

11 ай бұрын

the L8T is direct injected, but has no VVT or AFM. I think it's a great candidate for a similar comparison. with built LS engines of similar displacement.

@rustysausage69

11 ай бұрын

On motors in stock cars yes absolutely. And even takeout motors, a valve job is a requirement. BUT.. Catch can not breathing through the intake, DI delete, AFM delete and you have no greater or worse reliability than the LS. Thats assuming the water pump pulley doesn't spin on the shaft, overheat it and crack the block lol

@robertmontalvo597

11 ай бұрын

I speak from experience. When I tell you the LT is just not as reliable as an LS I worked at a GM dealership for over six years in Houston. AFM failure. Dod failure. Injector failure. Connecting rod failure. I'm not downing it I'm a Chevy guy.

@joeinmi8671

11 ай бұрын

You smoking something special today?

LT 5.3 are 355hp stock

Might just sell my 243 heads and start building some LT heads now. Do they make carb manifolds for the LT?

@jamarjohnson1595

11 ай бұрын

Yes sirrr👌

What about LS stroker with Lt heads

Does the nexus have direct injection control? Otherwise how was fueling controlled with the tests on the l83? I honestly thought the R5 didnt have provisions for GDI.

@richardholdener1727

10 ай бұрын

L83 was actually run with factory ECU-my mistake

I am guessing Rich that the aftermarket cathederal port is equivalent or better than a rec port and we would see no power gains on the LS test with the rec port heads?

@richardholdener1727

11 ай бұрын

rec port heads won't fit the small bore 5.3L

Did you lock out the cam phasing on the l83 with the mild BTR cam?

@inaNis_

11 ай бұрын

I’m going to guess no just by looking at the torque curve. Locking out VVT kills a lot of the torque that you’d get down low even with a bigger cam

Do they change injectors on DI engine, or do they use stock injectors? Just curious. Thanks for the Video!

@richardholdener1727

11 ай бұрын

there are bigger DI injectors

@SMOKEY-JAYS-DIESEL

10 ай бұрын

​@@richardholdener1727l83 5.3 likes lt4 injectors with gt4202r turbo 🔥🔥

Thats impressive with the lt hybrid stuff. Would ported lt heads make 600hp with a 6 liter ls block?

@richardholdener1727

11 ай бұрын

wait til you see how they did on a 6.2L

@derekr1854

11 ай бұрын

@richardholdener1727 I'll be waiting lol. I have a ls3 block sitting for a future build 😁

Why is chevy not putting an imrc valve to get both long runners and short runners out of their intakes? Just a question dont kill me in the comments

Why no l8t stuff @richard holdener

What size injectors do i use in a 5.3 has a cam and flat top Pistons pretty much stock?

@richardholdener1727

11 ай бұрын

we used 80s, you will need something above 30s

What’s the limit on the l83 on camshaft before you have to fly cut the stock pistons ? Anyone know?

@rustysausage69

11 ай бұрын

235@.050 is where it starts getting sketchy. For that reason I personally would not go over 230.

Richard, Do you record bsfc and engine vacuum?

@richardholdener1727

11 ай бұрын

engine vacuum yes

I have a 2002 S10 with a gen 4 5.3 in front of a NV3500. Running off of a e67 ECU. can i use the same ECU if i were to build a LS/ST hybrid??

@richardholdener1727

10 ай бұрын

ALL THE ECU CARES ABOUT IS THE CRANK AND CAM TRIGGER PATTERNS-YOU WILL LIKELY KEEP THOSE THE SAME

My question is why such a long LSA on all these motors. We raced dirt track and ran cams with 106 to 108 LSA. We were running in lower classes, flat topped 358 SBC. Just wondering what affect the longer LSA has. I see drag motors running at least 110 and up.

@WildEngineering

11 ай бұрын

I think its because they dont want to flycut the pistons for PTV clearance? Idk i saw some DV videos on the topic and it seems to boil down to manufacturers that make the cam sell to the biggest market of buyers - most buyers wont flycut.

@shadowopsairman1583

11 ай бұрын

Look at TSP Chopacabra and BTR Truck Norris

@WildEngineering

11 ай бұрын

@@shadowopsairman1583 id avoid TSP grinds but BTR and GPI are good alternatives(anyone who uses spintron is better than TSP)

@lukesimeon5756

11 ай бұрын

Richard has already done an LSA test on a LS402ci 108,112,120 and yep you guessed it the 108 won ... he also did not do any advance/retard sweeps ... possibly could have found more power idk

@horsefly1020

11 ай бұрын

You would have to fly cut pistons with a tight LSA.

Are they SMOG legal?😞

Do a 6.0 or 6.2 ls and lets see those numbers

@WildEngineering

11 ай бұрын

I really wish they did more 6.2 stuff

@richardholdener1727

11 ай бұрын

There is 6.2l testing too

Why didn't they do all this with the LQ4 or LQ9

@richardholdener1727

11 ай бұрын

there is no 6.0l DI motor

Di always makes more power

@shadowopsairman1583

11 ай бұрын

Yet this is port injected L33 with L83 Heads

@joshchauvin5585

11 ай бұрын

Read the title

This assumes port injection with even the "stock" L83 runs?

@richardholdener1727

11 ай бұрын

what assumes what?

@geardogg

11 ай бұрын

@@richardholdener1727 You mentioned switching over to port injection on the hybrid. Was the L83 on port injection through all tests?

Lose the gray background on the graph

@richardholdener1727

11 ай бұрын

NO

@richardholdner1727 why no l8t stuff ?? Love your videos your the real mvp ....now lets see some l8t vs world (l92,l86,427ls/lt,lt1 mabey even 454lsx )😊

@richardholdner1727 why not l8t stuff ?? Please i must know lol love your videos your the freakin mvp

@richardholdner1727 why not l8t stuff ?? Please i must know lol love your videos your the freakin mvp