View Full Version : CARBURATION
JEFF69Z28
11-17-2008, 03:26 AM
OVER THE WINTER IM GOING TO REBULD THE TOP HALF OFF MY MOTOR(406CID CHEVY) USEING AFR 210/65CC ELIMINATOR HEADS COMPITION PORTED/ SUPER VICTOR JR INTAKE AND A COMP.CAM SOLID ROLLER WITH 1.6 RATIO ROCKER ARMS.260/264 DURATION @50, 678/688 LIFT.BOTTOM OF MOTOR IS 4340 CRANK,6"H-BEAM RODS,JE FLAT TOP PISTONS,IM GUESSING MY COMPRESSION WILL BE ABOUT 11.25 TO 11.75 TO 1.CAN I STILL USE MY 750 HOLLEY OR WILL I HAVE TO GO UP IN SIZE,IF SO WHAT SIZE WOULD WORK. :?:
jmarksdragster
11-17-2008, 06:29 AM
You don't have to go up, but a 1050 or 1000HP would be worth about .010-.015 in ET. You have to decide if the money spent is worth the gain for you.
dparker
11-17-2008, 01:23 PM
Sounds like you have some pretty good parts. I think you could bump the compression up. Get a good carb and fly...
hammertime
11-17-2008, 01:48 PM
I think a good 950 would be a need with the added upgrades.
Like mentioned above some compression would wake it up.
JEFF69Z28
11-18-2008, 05:03 AM
SHOULD I HAVE THE HEADS MILLED TO GET 12.5 OR SO COMPRESSION THAT WOULD BE CHEAPER THAN BUYING NEW PISTONS CORRECT?
hammertime
11-18-2008, 06:44 AM
SHOULD I HAVE THE HEADS MILLED TO GET 12.5 OR SO COMPRESSION THAT WOULD BE CHEAPER THAN BUYING NEW PISTONS CORRECT?
Yes this would be the cheapest way to go, just make sure you have plenty of piston to valve clerance.