MustangWorks.com : Ford Forums - View Single Post - Getting Zex 75-125. what can I expect

RPM427 · 07-16-2002, 12:22 PM

An adjustable reg is HIGHLY recomended so you can fine tune the FP. With the dry Zex kit, the additional fuel is delivered by raising the fuel pressure while spraying. With the stock injectors, fuel pressure would be 90+ while spraying the 125 hp jet. This could lead to the injectors going static (staying open).

If you upgraded the fuel pump alone, it would help. But the injectors would still be at that elevated pressure. it would be best to get the 24 pounders, an AFR, and a 190+ fuel pump. That would be the safest bet.

ALSO!!! Run a scan on the computer and check for any codes that may be there. Fix any little problem before installing the Zex kit. Spraying N2O will not fix any problems! only make them worse.

07-16-2002, 12:22 PM	#4
RPM427 Registered Member Join Date: Aug 2001 Location: Huntington NY Posts: 573	An adjustable reg is HIGHLY recomended so you can fine tune the FP. With the dry Zex kit, the additional fuel is delivered by raising the fuel pressure while spraying. With the stock injectors, fuel pressure would be 90+ while spraying the 125 hp jet. This could lead to the injectors going static (staying open). If you upgraded the fuel pump alone, it would help. But the injectors would still be at that elevated pressure. it would be best to get the 24 pounders, an AFR, and a 190+ fuel pump. That would be the safest bet. ALSO!!! Run a scan on the computer and check for any codes that may be there. Fix any little problem before installing the Zex kit. Spraying N2O will not fix any problems! only make them worse. __________________ -1993 Mustang, 900rwhp 03-04 cobra based 4v swap, full Griggs setup, project underway -1994 Ranger w/ 427cid windsor (daily beater) check it out!