[olrocker]

Just thinking about the old SAE gross ratings of the original muscle car era and I had a real mind blower…..

If our 455 hp LT1s were rated in gross circa 1963-71 it’d have been rated about 570 hp!!!

Those of you with the 650 hp supercharged LT4? 810 hp!!!!

Take that Chevelle SS396, Charger 440 Magnum and 426 Hemi, and Ford 428 Cobra Jet

[ctrlz]

Here's what he's talking about:
https://www.carscoops.com/2022/01/50...w-it-happened/

[JT6Speed]

Yeah it would be nice if it worked like that lol, but with electric fans, no power steering pump to turn, a much better exhaust, etc, you probably could take the 1 away from the 130hp.

[DaveC113]

LT4 is rated w/o SC losses so you get -100 whp vs -50 for the LT1. So LT4 is really only +150 hp, not +200.

Otherwise accessory losses aren't nearly that large on a modern engine.

[olrocker]

Originally Posted by JT6Speed

Yeah it would be nice if it worked like that lol, but with electric fans, no power steering pump to turn, a much better exhaust, etc, you probably could take the 1 away from the 130hp.

Well then, to equalize that you’d have to remove all 4 catalytic converters and every ounce of smog control on a modern engine.

Even with the advanced computers managing everything there would still be a substantial increase in hp on the modern engine.

[JT6Speed]

Originally Posted by olrocker

Well then, to equalize that you’d have to remove all 4 catalytic converters and every ounce of smog control on a modern engine.

Even with the advanced computers managing everything there would still be a substantial increase in hp on the modern engine.

Oh yeah there would definitely be a decent increase, but I'd be shocked if it was anything more than 500hp (so we're losing about 45hp or so). The tri-y style headers flow pretty well and so does our intake. That's why you really don't gain much by doing a no-tune cold air intake or a cat-back exhaust.

[Alan47717]

Originally Posted by olrocker

Just thinking about the old SAE gross ratings of the original muscle car era and I had a real mind blower…..

If our 455 hp LT1s were rated in gross circa 1963-71 it’d have been rated about 570 hp!!!

Those of you with the 650 hp supercharged LT4? 810 hp!!!!

Take that Chevelle SS396, Charger 440 Magnum and 426 Hemi, and Ford 428 Cobra Jet

Your point is well taken, however, you have to remember that the advertised horsepower ratings for most of that era's "King Kong" engines were pure fiction, mostly to pacify insurance companies. 430 hp for the L88? 375 hp for the Boss 429? Please.

[2SS Capt]

Originally Posted by Alan47717

Your point is well taken, however, you have to remember that the advertised horsepower ratings for most of that era's "King Kong" engines were pure fiction, mostly to pacify insurance companies. 430 hp for the L88? 375 hp for the Boss 429? Please.

However most didn't have the technology or capability to put that power down... Perfect example the 1972 Olds 442 bragging about "wider 14x7" wheels... Please... I had 9.5" wheels with 275's on the back of my 2020 SS and couldn't get traction... Finally with 11.0" and 305 summer tires I can finally hook with some sort of reasonableness..