ok so this is my setup in case your wondering

87 Turbo II (Stock Ports)
Rtek 2.1
FMIC
T3/T4 turbo (8 PSI)
R-Magic manifold
550/1200 injectors
255 walbro
old school hks bov
all emissions removed except omp
innovate LC-1 WB

The seven runs fine if im cruising afr are like 14-15 but when i step on it and boost it goes from 10-9 afrs but right when i reach my transition point at 3072 the car just falls on its face and afr's jump to like 14-15ish so my questions is, is it timing related or do i just keep adding fuel. by falling on its face i mean when i push the gas pedal it just doesn't go anywhere and the boost dies. hope that helps thanks.

 

Its your 550/1200 combination. That is a HUGE difference, you will find it is impossible to tune that stumble out. If you search around in this forum, you will find explanations of why this is bad. I suggest you upgrade to something like 720/850 or 720/1000 injectors. You probably don't need 1200cc injectors for 8 psi even with the bigger turbo.

 

https://www.rx7club.com/showpost.php...33&postcount=2

 

Ok thanks a lot i do plan on running 14psi hence the bigger injectors i originally ordered 1000cc but i received 1200 by mistake so guess ill try putting some 720's for primaries see if that will help me, If that doesn't help me then ill bring my secondaries down to 1000's. Again thanks a lot for the help.