Lower hp ratings in HD trucks

Lessmore wrote:
Sounds like the way Chevy rated the old L-88 427 Rat motor in the late '60's. This engine was not really for the street, more of a semi race engine. Chevy rated it lower at 430 hp, than their 427 , 3X2 barrel carb 427 which was rated at 435 hp.

The 427-435 HP engine was an engine that ran well on the street and was not in the same high state of tune as the venerable L-88. Also the L-88 was very expensive and not many were made.

The reason, GM didn't want customers buying the L-88 because it was the top power rated engine in the line, then be unhappy with it, while trying to run this hopped engine on the street.

So....my understanding is that they also rated the 427 L-88's HP, not at the peak rpm where it developed it's top HP (some say around 560 HP) , but at a lower rpm, where it did, indeed develop 430 hp.

I'm sure there will be a few posters that will say...no...none of this happened.

But there you go.:D