I was talking to a tech from Manafuel on the phone a couple of nights ago. He was trying to explain to me the volume and pressure on fuel systems. I told him that my car has run 10.15 at almost 132 with the small 110 or 140 pump on it. He feels that I may be leaving a bit on the table on the top end. I think Jim said my car has about 6 1/2# pressure on the top end. What say ye? He did recommend a 275 and said a 300 would handle anything that I could throw at it.