maz87t2

iTrader: (6)

i have a 88 rx7 se converted to turbo 2 everything with rtek chipped ecu. 720cc primary and 1200 secondary injectors.i have a safc to fine tune it. the afr doesn't go over 12.5 at 8 to 10 pounds of boost in any gear. the question is why would my manifold and exhaust runners look like its been running lean. it even dips into the 10's right when the secondaries kick in. but still has all the signs of it running lean. the innovate wide band is a year old. car has only been driven maybe 30 times for less than 30 minutes at a time. don't drive it much. the sensor is about 2.5 to 3 feet behind the turbo. no cat or anything. has a t04b turbo with 3 inch back custom exhaust. just wondering why it would look to be lean but the wide band is saying different. i just don't want this thing blowing up. let me know what you guys think. thanks ryan

KhanArtisT

iTrader: (2)

What signs of running lean have you seen? If the exhaust is glowing it means you're running rich. I don't understand how the intake can show signs of running lean. If the wideband reads 10s you're obviously not. Can you explain further what the real problem is?

Nick_d_TII

iTrader: (6)

Maybe take a look at the plugs? rtek 1.7 is for 720x720 inj. If it hasn't blown yet, why would you think it is going to? Your probably fine. I would suggest not to turn up the boost tho... unless your AFC is down as far as possible. not sure exactly how AFC's work exactly tho...

FWIW: Even on my stock turbo the turbine had some white-ish soot on it.

K-Tune

iTrader: (26)

11.4 should be your target AFR at WOT.

FC3Sdrift

iTrader: (5)

12's are a bit on the lean side
set your safc up to work off boost rather than the TPS its a 100 times better

maz87t2

iTrader: (6)

i pulled the turbo manifold off today and the exhaust ports werent black they looked like a lean spark plug. i havent pulled the plugs yet.so i should tune it for 11's? and how would u make it work off boost instead of TPS. theres no real problem yet. just wanted to know why the exhaust on the housings and the manifold and the turbo look like a spark plug that has been lean. like a mustard color. not black at all. im trying to save up the money for a stand alone but thats a long time coming. so the safc will have to do for now. i havent had any tuning problems with it so far. i have been adjusting it myself. the car runs flawless. i had it tuned for 15 pounds of boost at 12.5 afr. i turned it down because the only reason i need that much power is to show off. so i turned it back down to 8psi. im 23 and know alot about these cars just didnt know whats going on with this lean looking situation. i dont have the money to purchase a new engine if i pop this one. i mean its a fully built 3mm seals fd corner springs s4 rotors large street port it can handle the power. just wanna make sure u know.

maz87t2

iTrader: (6)

and at 15 pounds of boost i think i had about 5% fuel added. i have room for more adjustment. id hope the 1200cc injectors can handle that little t04b.

FC3Sdrift

iTrader: (5)

you take the 5 volt source from the boost pressure sensor, instead of 5v from the TPS planty of write ups in the SAFC section, you can tune for high and low boost rather than high or low throttle

honestly man , i would be scared to run my car at 12.5 at 15psi, thats probably why it looks lean, because that is pretty lean. one little glitch or boost spike and its all over

back it down to 11.5, it gives you a nice safety margin.
i dynoed 361whp 309ft-lbs tuning with my AFC neo.
1200cc are not a problem at all, i have 2 x primary 4 x 550cc injectors


dont listen to what fuel corrections other people have it depends on what your motor needs