Originally Posted by russ67chevelle
15:1 COMPRESSION AND ONLY GIVING HIM 600-700 HP?!?!?!???
It all depends on the heads, but 15.1 usually has really good heads. My guess if he's flowing around 390 - 400cfm is 775-800hp maybe even a little more. Sounds like his build up is close to my old motor. 502 blocks are known for being weak. Not that their bad just not as strong as other GM blocks. Like I was, sounds like he's a little worried about pushing it to far and loosing more than a block.