Why not more 454's?

[truckinL33]

Why are some of you so immature that you can't type a post without insults?

Again, the internet. Everyone is ignorant, except for you I guess.

[cjriojas]

The EPA forced the phase out of the big block. There was no such thing as a high performance V-8 after the early 70s. As the car manufacturers got better at emissions and mileage the motors started to make better power. Then they started to get bigger again. That's why you now have a 427 again.

i understand this already. i just think its funny that a 427 LS7 small block generates an equal amount of power as the L88 with 4 times the mpg.

But it was too late for the big block. You can still get them at the parts department, you just can't get a good one in a car anymore.

this means they were phased out for their inefficiency

If GM spent the money on the big blocks they would match everything the LSx does better than you might think.

so if GM made a big block LSX, it would be wicked awesome? i agree 100%

The big block naturally has more cubes than a small block. That's why it's a big block. To utilize the advantage of a big block, it's going to have a lot of cubes. If you want to compare a small block to a big block you are going to have to live with the fact that the big block is going to be bigger. Get over it.

if it makes you feel better about yourself that you need to resort to the 572 in comparison with a SMALL BLOCK 427 then thats fine with me.

Why are some of you so immature that you can't type a post without insults?

i have over 1300 posts without insults to members. the fact you take the 60's dyno numbers as 'solid' is what was getting me. every auto manufacturer had their own dyno with formulas to make the hp rating higher. i think in the 80's or something everyone started to the use the same formulas to reach the max rating they can get.

[IXLR8]

i understand this already. i just think its funny that a 427 LS7 small block generates an equal amount of power as the L88 with 4 times the mpg.



this means they were phased out for their inefficiency



so if GM made a big block LSX, it would be wicked awesome? i agree 100%



if it makes you feel better about yourself that you need to resort to the 572 in comparison with a SMALL BLOCK 427 then thats fine with me.


i have over 1300 posts without insults to members. the fact you take the 60's dyno numbers as 'solid' is what was getting me. every auto manufacturer had their own dyno with formulas to make the hp rating higher. i think in the 80's or something everyone started to the use the same formulas to reach the max rating they can get.

The 427 LSx doesn't get 4 times the mileage. If the old L-88 or ZL-1 had EFI and roller cams they would make more power and get much better mileage than they did.

The big block was phased out because it was too big. Everything got small for a while. The V-8 came very close to being a thing of the past.

The LSx isn't a big block for the reasons mentioned above.

So you think it's OK to compare the biggest small block to the smallest big block? I don't think so, big blocks got bigger over the years, not smaller.

The formula to compute horsepower has never changed.

The configuration of the motor when dynoed did change with GM. But it had nothing to do with privately owned dynos which regularly showed the L-88 producing 500+ horsepower back in the 60s.

[RedHeartbeat]

FWIW, the correct factor for calculated HP has changed many times and there currently are quite a few correction factors being used at this time.

[IXLR8]

FWIW, the correct factor for calculated HP has changed many times and there currently are quite a few correction factors being used at this time.

The way the factory measures horsepower has changed. But the formula to find horsepower has never changed. The correction factor only has to do with the weather and altitude.

[RedHeartbeat]

not just weather and altitude but I'm sure know that.

[IXLR8]

not just weather and altitude but I'm sure know that.

The correction factor only takes into account the weather and altitude and attempts to create a level playing field to compare dyno numbers.

[IXLR8]

I think what some of you are struggling with is when GM changed from gross horsepower to net horsepower. I believe what changed was net horsepower had the engines accessories in place. They have probably also changed the correction factor they use over the years which is why some of the GM engines seem under rated.

Back in the 60s they played major horsepower games for other reasons. Some of the ratings were purposely way off the mark.

[bangbangskeetskeet]

So you think it's OK to compare the biggest small block to the smallest big block? I don't think so, big blocks got bigger over the years, not smaller.

How about a big blok 427 vs an LSx 427? Do I really need to say it again? Or like Boz said are you that ignorant?
CUBE FOR CUBE THE LSX WILL OWN

[IXLR8]

How about a big blok 427 vs an LSx 427? Do I really need to say it again? Or like Boz said are you that ignorant?
CUBE FOR CUBE THE LSX WILL OWN

You need to go back and do some reading.