PDA

View Full Version : Modded Sirio09 carb settings???



tdrinc1
02-05-2008, 05:24 PM
I modded the intake and turbo ports cut channels and cleaned up and opened up crank and face as well as polish and modded rod. My ? is now instead of running needle at 3 turns out Im having to run even leaner at 2 to 2 1/4 turns out ? According to others modding motors they say I should be having to richen instead of leaning it but thats 2 needle carb compared to my single needle. It does make a ton and I mean a ton of more power all across the power range and temps are at 235 degress near the end of hard quailier style runs up and down the street. I was wondering if anyone had any insight?

46u
02-17-2008, 04:01 AM
Modifying and engine you are making it more efficient so I would think you would have to lean it out. Normally a modified engine gets better fuel economy do to this.