Have you .....May 27 2012 at 5:18 PM
Dan in MI (Login VWDan)
Response to Pretty sure it's not a volume issue, Scot...
Have you shortened the threaded section of the of the valve body? You can shorten it to about 0.375" above the shoulder where the o-ring is sandwiched.
The valve body bore can be bored out to 0.475" to allow more air flow around the pop-it valve head.
You might want to try a search and see if you can find anything on the subject by Rich from Michigan. I know he has done a few big bores (.308) based on the QB with a modified stock valve that have produced about 100 fpe.
''If everything seems under control, you're not going fast enough!'' Mario Andretti
|This message has been edited by VWDan on May 28, 2012 7:20 AM|