Date registered: Mar 2010
Vehicle: 560SEC, 190E, Frontier, 240Z
Mentioned: 0 Post(s)
Quoted: 16 Post(s)
The settings on the EHA valve have to be fine-tuned for each car and Distributor.
It sets the difference in fuel pressure between upper and lower chambers.
As a rough, you could use fuel pressure gauges and get the pressure difference referenced in the manual.
Or, you can reference the Duty Cycle and see what the DC does at 2500rpm compared to idle. The DC needs to be very similar at 2500rpm vs idle and then your EHA is about right.
Remember to burp the FD each time you open the system and drive it some to normalize the changes in between.
Tom Johnson, Phoenix, Az
1973 240Z (Track only)
2003 F350 7.3