SWAMPHUNTER45 wrote:I believe that every engine based on it design and component spec will respond differently.
In testing and real world use I can tell you that in a direct drive application that getting 25 to 35 additional "pound foot" of torque is noticeable on the tachometer. Depending on the prop it can be an additional 40 to 150 rpm so it matters.
You go from a 305 with hours on it to a properly built 383 you will see a gain in push I am sure.
The 350 probably a small gain but more will depend on its condition and tune as the stroke is equal.
In this case 305 vs 350 it is only the additional 45 cubic inches of volume divided by 8 cylinders as the boost. A more powerful explosion but not a longer duration of power transfer.
Interesting, so I’ll see what happens when I run the 350. The 305 was stock besides an edelbrock performer intake. I’m planning on a low end cam and same intake on the 350. So we’ll see how much it improves the rpm. Get some testing going.