sLiCk WiLlIe

iTrader: (10)

I posted this before.....i don`t have a wideband yet, but it is on its way. My question is: at about 5000rpms it wants to lean according to the narrow band and loses power, this is at 12psi. i have a fmic 2.5" piping, majestic stage I turbo, ported wastegate, 550cc pri, 720 sec, rtek 1.7, s-afc, 255 walbro pump(rewired). 3"dp/exhaust. I can`t figure out why it does this, any solutions? I`m gonna try 890cc sec and put the 720s in pri. my fuel corections are: 3500rpm 18%, 4000rpm 20%, 5000rpm 26%, 6000rpm 28%, 7000rpm 30%. Any help would be appreciated!

cewrx7r1

iTrader: (2)

Most likely your injectors are too small unless you fuel filter or something is reducing fuel flow. The FD runs 550-850 and these are only safe for about 330whp.

sLiCk WiLlIe

iTrader: (10)

i just changed the fuel filter and no change....i put 3"rb dp and full exhaust....its fine at 8 psi...so i guess bigger injects.

GUITARJUNKIE28

the 550/720 combo will outflow your turbo.

could be a bunk warlboro or a plugged filter. could be a fuel pump voltage issue (is it stock or rewired?)

start by bumping up the fuel in those areas. 550/720 should give you enough gas for ~300whp @90-95% duty cycle. that's more than your turbo flows.

stock is limited to 58% duty cycle iirc. so 58% + 30% of 58%... just crank the fuel up, but definately get the wideband or get it on the dyno. it's not worth risking the engine just to find out.

sLiCk WiLlIe

iTrader: (10)

pump has been rewired, and i changed the filter.....i`m running 8psi, and now its fine....i`m gonna try bigger injectors too