6.0L LS2 VS 6.2L LS3-WHICH ONE MAKES MORE HP STOCK, MINOR MODS THEN ALL THE MODS? FULL DYNO RESULTS

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Published 2024-05-22

IS BIGGER REALLY BETTER? HOW MUCH MORE POWER DOES THE LS3 MAKE COMPARED TO THE LS2? ARE THE REC-PORT 821 LS3 HEADS REALLY BETTER THAN THE CATHEDRAL-PORT 243 LS2 HEADS? WHICH ONE HAS HIGHER COMPRESSION? WHICH ONE HAS A BETTER INTAKE MANIFOLD? WHICH ONE MAKES MORE TORQUE? WHAT HAPPENS WHEN YOU START CHANGING CAMS, HEADS OR INTAKES? CHECK OUT THIS DYNO COMPARISON BETWEEN A FACTORY LS2 AND FACTORY LS3 RUN IN STOCK TRIM, THEN AFTER MINOR MODS, THEN AGAIN AFTER EVEN MORE MODIFICATIONS! HOW DOES THE 6.0L COMPARE TO THE BIGGER 6.2L?

All Comments (21)

@hitempguy 2 months ago

I did a LQ4 with LY6 heads and an ls3 intake plus a summit stage4 cam. Thing screams to 7500rpm all day long. Total cost, less than $1500. I'm a big believer in rec-port supremacy when combined with the ls3 intake. Cathedral port FAST intakes are too expensive, especially if you consider upgrade path with better heads. REC PORT FTW!
@silkyjohnson5976 2 months ago

Hell yeah, more LS tech videos!
@benmclean2291 2 months ago

Here in Australia we got the LS3 in our Holden SS Commodores (Chevy SS) and it’s an awesome motor.
@GIZZMOTORSPORTS 2 months ago

Ls3 possibly the GOAT in terms of somewhat affordable reliable power
@sodak3427 2 months ago

Chose the ls3 and made it a 416 stroker.. cant wait to try this motor.
@CHubbs376 2 months ago

After a lifter killed the LS2 that came in my GTO, it was replaced by 6.2 L92 truck engine that is now 10.7:1 with a 230ish cam, milled stock heads, and a ported LS3 intake. Maybe it’s the displacement, but I never missed the low end of the cathedral ports even at part throttle. The MPGs have definitely taken a hit even compared with the cammed LS2. That might be the big ports and displacement. The car is a lot faster, though.
@ryanherron1423 2 months ago

I just made a 408 with a set of CNC 317s, Stage 4 BTR Truck Cam, dual plane Intake with a 750 cfm FST Carb. All that in a '86 Monte Carlo LS backed by a TKX. It does not disappoint!
@robp.1995 2 months ago

Ls3 of course
@Gotboost428 2 months ago

Love the videos with Rec port heads! Make all the rec port headed content!
@dylandesmond 2 months ago

There's no replacement for displacement. I'm not even going to watch this. Keep up the great content.
@hbmdre 2 months ago

I’m building a ls2 right now so this will be helpful
@bdugle1 2 months ago

I would like to see the LS2 entrant compared to an LY6. I know the LY6 produces around 443 hp when the VVT is scrapped and an LM7 cam is installed. Putting an LS2/LS3 cam with 15° more intake lobe has to make a difference—even though you’d give up a full point of compression. Then the upgrade path has to include the flattop pistons… Great video, thanks Richard!
@erickbernard8208 2 months ago

Next video should be an LS4 that's been BUILT BUILT lol😂😂
@treybadd 2 months ago

Option 3, Stroked LS2 with ported and milled (by Ed Curtis) LS3 heads /intake and Ed Curtis FTI custom cam.
@robertbaker837 2 months ago

I take what I can get. Brilliant as usual Richard!
@danecooper1914 2 months ago

You do the Lord’s work. We are all indebted to you!
@ethan5.56 2 months ago

I’d love to drop a 408 in my 2007 suburban 4x4. Currently a stock 5.3 with 320,000+ miles on it and she could definitely use the power 😂 great video as always
@madmod 1 month ago

Just found a 6.2 Cadillac in the junkyard with a bad transmission. Hoping to get it yanked by tomorrow
@chopperking007 2 months ago

Here in Australia we have L98s which are a 6.0lt with rec port heads which are very sort after
@TK-eg7eg 2 months ago

I have a 6.0 (rods and pistons) iron block with gmpp LS3 heads with a magnuson 2300 heartbeat supercharger.