I'd be happy with that vf1 power figure! Shame most of them dyno less than 220kw (alot of them making barely over 200kw).. looks like it got left behind after a few mods which would back cudas claims of the ls3 being favorable with basic mods.
You are still generalising with your opinion without evidence regarding both engines and confusing absolute uncorrected dyno figures subject to temp, baro and other variable setup parameters with actual calibrated SAE or STD standards. Is not a shame or pity, is just not suitable for comparison. Nor is general comment in keeping with the technical nature of this thread.
Off- Topic re: LS3 being inherently “better” for unopened mods
Flex fuel is not a mod, +5% should be noted as highest stock peak, puts L77 ahead.
The unopened RPM ceiling for daily driver tuning mods usually occurs before the engine’s redline. John is an expert, he has built many drag cars like this. GenIV with hypereutectic pistons redline is 6600 RPM, John’s tune revs 6750+. That’s 1000 RPM more than the 6.0 was allowed to spin, aka significantly higher HP potential.
John clearly has the experience however I also have experience (and more faith) in revisions to the AFM setup courtesy of drag race testing by the car’s current NA world record holder, who regularly takes the AFM engine past redline. My RPM ceiling for example was 6400 unopened, limited by injectors on flex, not AFM.
Tune results can’t be compared when one puts an RPM (HP) ceiling 1000 RPM less vs the other. So
@monty_vfssv to assert that one engine “gets left behind after a few mods” is baseless.
Also incorrect to derive from max effort drag tuning that LS3 is “better” for daily driver mods, when peak power is shown within 5% of each other, that is until the lesser valve lift of the stock 6.0 cam takes a toll around 270-285 rwkw.
It is correct to state the cam fitted as standard to the LS3 allows greater peak power, no doubt.
Different cam events, more than anything else to do with head / bore fit, allow the 6.2 to reach the higher power peak.
From the evidence there is 2.5% difference stock, less than 5% with mods up to 270-285 rwkw where the AFM cam restricts power.
[It is worth a note that bolting high ratio rockers to increase lift (time/area duration) brings flow of the AFM cam back to within 5%.]
LS3 cam with FBO makes 304 rwkw on 98, +7.5% vs 6.0 on 98. Flex fuel does level the score