1966 390 hp 427 dyno results

[Jef S.]

What should a completely stock rebuilt 1966 427 390 hp engine actually develop for horsepower at break in on a dyno?

[Mike F.]

Re: 1966 390 hp 427 dyno results

You'll need to provide a little more information than that. When you say "stock", how stock? Nothing done to the heads? No decking of the block? Compression ratio? How was it configured on the dyno?

I would guess that if you pulled a typical 1966 427/390 engine off of the production line and ran it on an engine dyno, you would get somewhere in the 350-375hp (gross) range.

Here's an article on a slightly modified 427 build. http://www.corvettefever.com/techart..._engine_build/

[Jef S.]

Re: 1966 390 hp 427 dyno results

Thanks that's exactly what they got when the machine shop ran mine on their dyno. 355

[Mike F.]

Re: 1966 390 hp 427 dyno results

Can you post a pic of the dyno sheet? 355hp@???? , xxxtq@????