View Full Version : AFP question

12-02-2005, 11:03 AM
i dont have a fuel pressure gauge but what is one fuel turn equal to in terms on psi increments.

ex) does one full turn it= 1 psi

12-02-2005, 01:23 PM

I found that with my old ATR regulator (modified Bosch 237), one full turn was about 6 PSI.

Best to just attach a gauge and see what the facts are. It may vary by manufacturer due to thread progression on the adjustment screw, size of the bellows, etc.

12-02-2005, 09:12 PM
FWIW, you can buy one at an auto parts store for about $30 for general "idle" tuning, or get a T and a underhood/hoodmount for about $70 for WOT runs.