You can achieve 850whp through an auto on pump gas if you have meth and are dead on the tune. Dropping the compression just lowers the total power output per psi. For these motors I wouldn't take it lower than 10.5:1.
The hard truth is people always want to push as much power as they can on pump gas and it's just not feasible to do safely most of the time. Why spend all that money on a forged motor just to risk it on a bad batch at the pump or bad air, etc etc.
Also your turbos are quite small on a motor of our displacement. My guess is they will run out of breath around 16-18psi depending on cam combo.
Quote:
Originally Posted by jessrayo
All of the drop in pistons I have seen maintain the stock compression ratio of 11.5 to 1. This is too much compression to run significant boost on pump gas. The stock compression ratio is only going to allow about 650 whp unless you run alcohol or high octane race gas. I'm going to drop to at least 10 to 1 compression ratio so I can push more boost off of pump gas.....it is really easy with turbos, just adjust the wastegate spring/settings.
*edit* I went to the Cunningham page.. http://www.cunningham-motorsports.co...bbcfecd6d8a275 and saw that these are 10.5 to 1 pistons. That is better but I have a lot more boost potential than most superchargers so I'm going to drop it even more while it is out. The other thing is my engine failed so it needs a complete disassembly and inspection, may have piston or ring fragments in the bottom so I need all new bearings and seals. |