{\rtf1\ansi\ansicpg1252\deff0\deftab720{\fonttbl{\f0\fswiss MS Sans Serif;}{\f1\froman\fcharset2 Symbol;}{\f2\fswiss\fprq2 Tahoma;}{\f3\froman Times New Roman;}} {\colortbl\red0\green0\blue0;} \deflang1033\horzdoc{\*\fchars }{\*\lchars }\pard\plain\f2\fs20 re: Inlet restriction - it was me being a dumb ass. \par \par About a year or so ago, after I moved here, my car was running slower than before, so I decided to pull the air filter off at the track and see if it was clogged. (Stock longblock combo). My KB MAF has no screen and since it is a straight shot to the blower, I got some fiberglass screen from the hardware store and it had some pretty wide holes so I thought it would be okay. I attached it to teh front of the MAF. \par \par In back to back tests, I did NOT slow down any real amount ( a few 100ths) or pick up an, so I put the filter back on. \par \par Fast forward a year and the new 306 and EB heads. In the summer I slowed down 4 mph after putting the slicks and skinnies on and actually lost 1 tenth even with a better 60'. Something was wrong. \par \par I saw the filter screen one day and said - Hmm. I wonder. Turns out, the screen had closed up somewhat and was probably restricting flow. I pulled it out and picked up a couple tenths a a couple mph. added some more fuel (I was already a bit lean) and it picked up more. Added a bit more timing adn even better. \par \par In 3 subsequent trips to the track, I went from 12.8@107-108 to 12.6@110, to 12.4@111, to 12.2@112. Finally on the next trip, it went 12.0x@113.6 and 11.99@113.3 All it took was getting rid of the restriction and now the car wanted more fuel and timing where it was slower before. \par \par Since I kept getting faster, I'm looking forward to this season as the 11.99 was the last pass on the last day or racing for the season. track closed until end of feb. \par \par Anyway, i couldn't believe how a $0.28 piece slowed me down 3/4 of a second!! :D \par }